/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 interpolation-heuristic=FIRST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/product-lines/minepump_spec2_product33.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 14:43:28,047 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 14:43:28,050 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 14:43:28,089 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 14:43:28,090 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 14:43:28,098 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 14:43:28,101 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 14:43:28,104 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 14:43:28,106 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 14:43:28,109 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 14:43:28,110 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 14:43:28,111 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 14:43:28,111 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 14:43:28,114 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 14:43:28,116 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 14:43:28,117 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 14:43:28,119 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 14:43:28,120 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 14:43:28,122 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 14:43:28,129 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 14:43:28,131 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 14:43:28,132 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 14:43:28,133 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 14:43:28,134 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 14:43:28,145 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 14:43:28,145 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 14:43:28,146 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 14:43:28,147 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 14:43:28,151 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 14:43:28,152 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 14:43:28,152 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 14:43:28,155 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 14:43:28,156 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 14:43:28,156 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 14:43:28,157 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 14:43:28,157 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 14:43:28,158 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 14:43:28,160 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 14:43:28,160 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 14:43:28,161 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 14:43:28,162 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 14:43:28,162 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 14:43:28,205 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 14:43:28,205 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 14:43:28,207 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 14:43:28,207 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 14:43:28,208 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 14:43:28,208 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 14:43:28,208 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 14:43:28,209 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 14:43:28,209 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 14:43:28,209 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 14:43:28,210 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 14:43:28,210 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 14:43:28,210 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 14:43:28,211 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 14:43:28,212 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 14:43:28,212 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 14:43:28,212 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 14:43:28,212 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 14:43:28,212 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 14:43:28,213 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 14:43:28,213 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 14:43:28,213 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 14:43:28,213 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 14:43:28,214 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 14:43:28,214 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 14:43:28,214 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 14:43:28,214 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 14:43:28,214 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 14:43:28,215 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 14:43:28,215 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 -> interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> interpolation-heuristic=FIRST;log-additional-information=true; [2020-08-21 14:43:28,550 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 14:43:28,562 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 14:43:28,565 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 14:43:28,567 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 14:43:28,567 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 14:43:28,568 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec2_product33.cil.c [2020-08-21 14:43:28,624 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7a2c121d2/ec273da72bd649d483c615b3b33862d7/FLAGd7979b3e0 [2020-08-21 14:43:29,163 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 14:43:29,163 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/product-lines/minepump_spec2_product33.cil.c [2020-08-21 14:43:29,176 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7a2c121d2/ec273da72bd649d483c615b3b33862d7/FLAGd7979b3e0 [2020-08-21 14:43:29,466 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7a2c121d2/ec273da72bd649d483c615b3b33862d7 [2020-08-21 14:43:29,476 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 14:43:29,478 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 14:43:29,479 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 14:43:29,480 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 14:43:29,485 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 14:43:29,486 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 02:43:29" (1/1) ... [2020-08-21 14:43:29,489 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e399bb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:43:29, skipping insertion in model container [2020-08-21 14:43:29,489 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 02:43:29" (1/1) ... [2020-08-21 14:43:29,498 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 14:43:29,559 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 14:43:29,978 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 14:43:29,990 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 14:43:30,116 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 14:43:30,155 INFO L208 MainTranslator]: Completed translation [2020-08-21 14:43:30,156 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:43:30 WrapperNode [2020-08-21 14:43:30,156 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 14:43:30,157 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 14:43:30,157 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 14:43:30,157 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 14:43:30,169 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:43:30" (1/1) ... [2020-08-21 14:43:30,169 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:43:30" (1/1) ... [2020-08-21 14:43:30,192 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:43:30" (1/1) ... [2020-08-21 14:43:30,193 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:43:30" (1/1) ... [2020-08-21 14:43:30,236 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:43:30" (1/1) ... [2020-08-21 14:43:30,259 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:43:30" (1/1) ... [2020-08-21 14:43:30,264 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:43:30" (1/1) ... [2020-08-21 14:43:30,284 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 14:43:30,287 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 14:43:30,287 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 14:43:30,288 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 14:43:30,289 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:43:30" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 14:43:30,384 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 14:43:30,384 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 14:43:30,384 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2020-08-21 14:43:30,385 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2020-08-21 14:43:30,385 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2020-08-21 14:43:30,385 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2020-08-21 14:43:30,386 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2020-08-21 14:43:30,386 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2020-08-21 14:43:30,386 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2020-08-21 14:43:30,386 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2020-08-21 14:43:30,387 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2020-08-21 14:43:30,387 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2020-08-21 14:43:30,387 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2020-08-21 14:43:30,387 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2020-08-21 14:43:30,388 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2020-08-21 14:43:30,388 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2020-08-21 14:43:30,389 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2020-08-21 14:43:30,389 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2020-08-21 14:43:30,389 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 14:43:30,389 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2020-08-21 14:43:30,389 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2020-08-21 14:43:30,389 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2020-08-21 14:43:30,390 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2020-08-21 14:43:30,390 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2020-08-21 14:43:30,390 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2020-08-21 14:43:30,391 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2020-08-21 14:43:30,391 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2020-08-21 14:43:30,391 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2020-08-21 14:43:30,391 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2020-08-21 14:43:30,392 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2020-08-21 14:43:30,392 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2020-08-21 14:43:30,392 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2020-08-21 14:43:30,392 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2020-08-21 14:43:30,392 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2020-08-21 14:43:30,392 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2020-08-21 14:43:30,392 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2020-08-21 14:43:30,393 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__1 [2020-08-21 14:43:30,393 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__2 [2020-08-21 14:43:30,393 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 14:43:30,393 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 14:43:30,393 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-08-21 14:43:30,393 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2020-08-21 14:43:30,394 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2020-08-21 14:43:30,394 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2020-08-21 14:43:30,395 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2020-08-21 14:43:30,395 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2020-08-21 14:43:30,396 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2020-08-21 14:43:30,396 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2020-08-21 14:43:30,396 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2020-08-21 14:43:30,396 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2020-08-21 14:43:30,396 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2020-08-21 14:43:30,396 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2020-08-21 14:43:30,396 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 14:43:30,397 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2020-08-21 14:43:30,397 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2020-08-21 14:43:30,397 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2020-08-21 14:43:30,398 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2020-08-21 14:43:30,398 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2020-08-21 14:43:30,398 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__1 [2020-08-21 14:43:30,398 INFO L130 BoogieDeclarations]: Found specification of procedure test [2020-08-21 14:43:30,398 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2020-08-21 14:43:30,399 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 14:43:30,399 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2020-08-21 14:43:30,399 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2020-08-21 14:43:30,399 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2020-08-21 14:43:30,399 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2020-08-21 14:43:30,399 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__2 [2020-08-21 14:43:30,400 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2020-08-21 14:43:30,400 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2020-08-21 14:43:30,400 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2020-08-21 14:43:30,400 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2020-08-21 14:43:30,400 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-08-21 14:43:30,401 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-21 14:43:30,401 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-21 14:43:30,402 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2020-08-21 14:43:30,402 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-21 14:43:30,403 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-21 14:43:30,403 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 14:43:30,403 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-21 14:43:30,403 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2020-08-21 14:43:30,404 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 14:43:30,404 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2020-08-21 14:43:30,404 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2020-08-21 14:43:30,404 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 14:43:30,404 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2020-08-21 14:43:30,404 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2020-08-21 14:43:30,404 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2020-08-21 14:43:30,405 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 14:43:30,405 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-21 14:43:30,405 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 14:43:31,482 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 14:43:31,483 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-08-21 14:43:31,492 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 02:43:31 BoogieIcfgContainer [2020-08-21 14:43:31,492 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 14:43:31,494 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 14:43:31,494 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 14:43:31,497 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 14:43:31,498 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 02:43:29" (1/3) ... [2020-08-21 14:43:31,499 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51d33187 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 02:43:31, skipping insertion in model container [2020-08-21 14:43:31,499 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:43:30" (2/3) ... [2020-08-21 14:43:31,500 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51d33187 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 02:43:31, skipping insertion in model container [2020-08-21 14:43:31,500 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 02:43:31" (3/3) ... [2020-08-21 14:43:31,502 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec2_product33.cil.c [2020-08-21 14:43:31,512 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 14:43:31,524 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 14:43:31,540 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 14:43:31,569 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 14:43:31,569 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 14:43:31,570 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 14:43:31,570 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 14:43:31,570 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 14:43:31,570 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 14:43:31,570 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 14:43:31,570 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 14:43:31,589 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states. [2020-08-21 14:43:31,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-21 14:43:31,598 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:43:31,599 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:43:31,599 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:43:31,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:43:31,604 INFO L82 PathProgramCache]: Analyzing trace with hash -884456721, now seen corresponding path program 1 times [2020-08-21 14:43:31,610 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:43:31,611 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1521028994] [2020-08-21 14:43:31,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:43:31,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:32,261 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 14:43:32,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:43:32,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:32,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:43:32,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:32,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 14:43:32,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:32,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:43:32,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:32,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 14:43:32,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:32,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 14:43:32,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:32,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-21 14:43:32,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:32,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-21 14:43:32,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:32,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:43:32,405 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1521028994] [2020-08-21 14:43:32,407 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:43:32,407 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 14:43:32,408 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971544174] [2020-08-21 14:43:32,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 14:43:32,414 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:43:32,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 14:43:32,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-08-21 14:43:32,433 INFO L87 Difference]: Start difference. First operand 156 states. Second operand 4 states. [2020-08-21 14:43:33,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:43:33,418 INFO L93 Difference]: Finished difference Result 248 states and 328 transitions. [2020-08-21 14:43:33,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 14:43:33,420 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 51 [2020-08-21 14:43:33,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:43:33,434 INFO L225 Difference]: With dead ends: 248 [2020-08-21 14:43:33,434 INFO L226 Difference]: Without dead ends: 139 [2020-08-21 14:43:33,439 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-08-21 14:43:33,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-08-21 14:43:33,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 110. [2020-08-21 14:43:33,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-08-21 14:43:33,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 129 transitions. [2020-08-21 14:43:33,537 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 129 transitions. Word has length 51 [2020-08-21 14:43:33,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:43:33,537 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 129 transitions. [2020-08-21 14:43:33,537 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 14:43:33,538 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 129 transitions. [2020-08-21 14:43:33,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-21 14:43:33,541 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:43:33,541 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:43:33,542 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 14:43:33,542 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:43:33,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:43:33,542 INFO L82 PathProgramCache]: Analyzing trace with hash -101366549, now seen corresponding path program 1 times [2020-08-21 14:43:33,543 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:43:33,543 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [223724238] [2020-08-21 14:43:33,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:43:33,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:33,854 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 14:43:33,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:43:33,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:33,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:43:33,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:33,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 14:43:33,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:33,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:43:33,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:33,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 14:43:33,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:33,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 14:43:33,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:33,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 14:43:33,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:33,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-21 14:43:33,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:33,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:43:33,907 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [223724238] [2020-08-21 14:43:33,907 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:43:33,907 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 14:43:33,907 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245766160] [2020-08-21 14:43:33,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 14:43:33,910 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:43:33,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 14:43:33,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-21 14:43:33,910 INFO L87 Difference]: Start difference. First operand 110 states and 129 transitions. Second operand 5 states. [2020-08-21 14:43:34,465 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 14:43:35,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:43:35,149 INFO L93 Difference]: Finished difference Result 193 states and 239 transitions. [2020-08-21 14:43:35,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 14:43:35,150 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 52 [2020-08-21 14:43:35,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:43:35,153 INFO L225 Difference]: With dead ends: 193 [2020-08-21 14:43:35,153 INFO L226 Difference]: Without dead ends: 129 [2020-08-21 14:43:35,155 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-08-21 14:43:35,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-08-21 14:43:35,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 101. [2020-08-21 14:43:35,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-08-21 14:43:35,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 117 transitions. [2020-08-21 14:43:35,189 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 117 transitions. Word has length 52 [2020-08-21 14:43:35,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:43:35,189 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 117 transitions. [2020-08-21 14:43:35,189 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 14:43:35,190 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 117 transitions. [2020-08-21 14:43:35,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-21 14:43:35,192 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:43:35,192 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] [2020-08-21 14:43:35,192 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 14:43:35,192 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:43:35,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:43:35,193 INFO L82 PathProgramCache]: Analyzing trace with hash -388267202, now seen corresponding path program 1 times [2020-08-21 14:43:35,193 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:43:35,193 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [269143133] [2020-08-21 14:43:35,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:43:35,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:35,520 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 14:43:35,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:43:35,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:35,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:43:35,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:35,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 14:43:35,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:35,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:43:35,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:35,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 14:43:35,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:35,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 14:43:35,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:35,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-21 14:43:35,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:35,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-21 14:43:35,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:35,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:43:35,620 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [269143133] [2020-08-21 14:43:35,620 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:43:35,620 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-21 14:43:35,621 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824575032] [2020-08-21 14:43:35,621 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 14:43:35,622 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:43:35,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 14:43:35,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-21 14:43:35,623 INFO L87 Difference]: Start difference. First operand 101 states and 117 transitions. Second operand 9 states. [2020-08-21 14:43:36,026 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 14:43:36,352 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 14:43:36,625 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 14:43:36,894 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 14:43:37,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:43:37,923 INFO L93 Difference]: Finished difference Result 202 states and 254 transitions. [2020-08-21 14:43:37,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 14:43:37,923 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 56 [2020-08-21 14:43:37,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:43:37,927 INFO L225 Difference]: With dead ends: 202 [2020-08-21 14:43:37,927 INFO L226 Difference]: Without dead ends: 129 [2020-08-21 14:43:37,928 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2020-08-21 14:43:37,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-08-21 14:43:37,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 101. [2020-08-21 14:43:37,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-08-21 14:43:37,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 116 transitions. [2020-08-21 14:43:37,960 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 116 transitions. Word has length 56 [2020-08-21 14:43:37,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:43:37,961 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 116 transitions. [2020-08-21 14:43:37,961 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 14:43:37,961 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 116 transitions. [2020-08-21 14:43:37,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-08-21 14:43:37,962 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:43:37,962 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] [2020-08-21 14:43:37,963 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 14:43:37,963 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:43:37,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:43:37,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1251165603, now seen corresponding path program 1 times [2020-08-21 14:43:37,964 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:43:37,964 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [46449904] [2020-08-21 14:43:37,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:43:37,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:38,259 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 14:43:38,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:43:38,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:38,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:43:38,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:38,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 14:43:38,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:38,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:43:38,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:38,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 14:43:38,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:38,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 14:43:38,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:38,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-21 14:43:38,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:38,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:43:38,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:38,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-21 14:43:38,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:38,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-21 14:43:38,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:38,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:43:38,363 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [46449904] [2020-08-21 14:43:38,364 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:43:38,364 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-21 14:43:38,364 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159273209] [2020-08-21 14:43:38,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 14:43:38,365 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:43:38,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 14:43:38,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-21 14:43:38,366 INFO L87 Difference]: Start difference. First operand 101 states and 116 transitions. Second operand 7 states. [2020-08-21 14:43:38,722 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 14:43:39,952 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 14:43:40,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:43:40,441 INFO L93 Difference]: Finished difference Result 287 states and 364 transitions. [2020-08-21 14:43:40,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-21 14:43:40,441 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 64 [2020-08-21 14:43:40,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:43:40,445 INFO L225 Difference]: With dead ends: 287 [2020-08-21 14:43:40,445 INFO L226 Difference]: Without dead ends: 214 [2020-08-21 14:43:40,446 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-08-21 14:43:40,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-08-21 14:43:40,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 168. [2020-08-21 14:43:40,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-08-21 14:43:40,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 195 transitions. [2020-08-21 14:43:40,491 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 195 transitions. Word has length 64 [2020-08-21 14:43:40,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:43:40,491 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 195 transitions. [2020-08-21 14:43:40,491 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 14:43:40,491 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 195 transitions. [2020-08-21 14:43:40,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-08-21 14:43:40,493 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:43:40,493 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:43:40,494 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 14:43:40,494 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:43:40,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:43:40,494 INFO L82 PathProgramCache]: Analyzing trace with hash 155242328, now seen corresponding path program 1 times [2020-08-21 14:43:40,495 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:43:40,495 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [90003935] [2020-08-21 14:43:40,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:43:40,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:40,784 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 14:43:40,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:43:40,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:40,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:43:40,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:40,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 14:43:40,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:40,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:43:40,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:40,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 14:43:40,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:40,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 14:43:40,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:40,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-21 14:43:40,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:40,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:43:40,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:40,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:43:40,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:40,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 14:43:40,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:40,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-21 14:43:40,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:40,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-21 14:43:40,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:40,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:43:40,879 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [90003935] [2020-08-21 14:43:40,880 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:43:40,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-21 14:43:40,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273974410] [2020-08-21 14:43:40,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 14:43:40,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:43:40,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 14:43:40,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-21 14:43:40,882 INFO L87 Difference]: Start difference. First operand 168 states and 195 transitions. Second operand 9 states. [2020-08-21 14:43:41,273 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 14:43:42,365 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 14:43:42,633 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 14:43:42,864 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 14:43:43,106 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 14:43:43,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:43:43,940 INFO L93 Difference]: Finished difference Result 495 states and 636 transitions. [2020-08-21 14:43:43,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-21 14:43:43,942 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 78 [2020-08-21 14:43:43,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:43:43,954 INFO L225 Difference]: With dead ends: 495 [2020-08-21 14:43:43,954 INFO L226 Difference]: Without dead ends: 355 [2020-08-21 14:43:43,959 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2020-08-21 14:43:43,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2020-08-21 14:43:44,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 284. [2020-08-21 14:43:44,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2020-08-21 14:43:44,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 330 transitions. [2020-08-21 14:43:44,057 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 330 transitions. Word has length 78 [2020-08-21 14:43:44,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:43:44,058 INFO L479 AbstractCegarLoop]: Abstraction has 284 states and 330 transitions. [2020-08-21 14:43:44,058 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 14:43:44,058 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 330 transitions. [2020-08-21 14:43:44,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-08-21 14:43:44,060 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:43:44,060 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:43:44,061 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 14:43:44,061 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:43:44,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:43:44,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1734675892, now seen corresponding path program 1 times [2020-08-21 14:43:44,061 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:43:44,062 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1420234341] [2020-08-21 14:43:44,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:43:44,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:44,428 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 14:43:44,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:43:44,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:44,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:43:44,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:44,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 14:43:44,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:44,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:43:44,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:44,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 14:43:44,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:44,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 14:43:44,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:44,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-21 14:43:44,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:44,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-21 14:43:44,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:44,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:43:44,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:44,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:43:44,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:44,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 14:43:44,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:44,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-21 14:43:44,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:44,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-21 14:43:44,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:44,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:43:44,565 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1420234341] [2020-08-21 14:43:44,566 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:43:44,566 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-21 14:43:44,567 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395362649] [2020-08-21 14:43:44,567 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 14:43:44,568 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:43:44,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 14:43:44,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-08-21 14:43:44,568 INFO L87 Difference]: Start difference. First operand 284 states and 330 transitions. Second operand 10 states. [2020-08-21 14:43:45,040 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 14:43:46,062 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 14:43:46,285 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 14:43:46,556 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 14:43:46,850 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 14:43:47,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:43:47,570 INFO L93 Difference]: Finished difference Result 646 states and 813 transitions. [2020-08-21 14:43:47,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-21 14:43:47,571 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 82 [2020-08-21 14:43:47,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:43:47,575 INFO L225 Difference]: With dead ends: 646 [2020-08-21 14:43:47,575 INFO L226 Difference]: Without dead ends: 390 [2020-08-21 14:43:47,577 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=182, Invalid=468, Unknown=0, NotChecked=0, Total=650 [2020-08-21 14:43:47,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2020-08-21 14:43:47,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 283. [2020-08-21 14:43:47,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 283 states. [2020-08-21 14:43:47,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 327 transitions. [2020-08-21 14:43:47,632 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 327 transitions. Word has length 82 [2020-08-21 14:43:47,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:43:47,633 INFO L479 AbstractCegarLoop]: Abstraction has 283 states and 327 transitions. [2020-08-21 14:43:47,633 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 14:43:47,633 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 327 transitions. [2020-08-21 14:43:47,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-08-21 14:43:47,635 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:43:47,635 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:43:47,635 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 14:43:47,635 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:43:47,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:43:47,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1892436078, now seen corresponding path program 1 times [2020-08-21 14:43:47,636 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:43:47,636 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [675980631] [2020-08-21 14:43:47,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:43:47,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:47,885 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 14:43:47,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:43:47,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:47,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:43:47,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:47,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 14:43:47,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:47,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:43:47,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:47,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 14:43:47,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:47,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 14:43:47,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:47,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-21 14:43:47,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:47,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-21 14:43:47,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:47,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:43:47,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:48,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:43:48,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:48,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 14:43:48,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:48,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-08-21 14:43:48,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:48,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-08-21 14:43:48,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:48,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:43:48,057 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [675980631] [2020-08-21 14:43:48,058 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:43:48,058 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-21 14:43:48,058 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811181212] [2020-08-21 14:43:48,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 14:43:48,059 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:43:48,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 14:43:48,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-08-21 14:43:48,060 INFO L87 Difference]: Start difference. First operand 283 states and 327 transitions. Second operand 10 states. [2020-08-21 14:43:48,999 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 14:43:49,239 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 194 [2020-08-21 14:43:49,479 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 14:43:49,711 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 14:43:50,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:43:50,490 INFO L93 Difference]: Finished difference Result 649 states and 823 transitions. [2020-08-21 14:43:50,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-21 14:43:50,491 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 83 [2020-08-21 14:43:50,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:43:50,495 INFO L225 Difference]: With dead ends: 649 [2020-08-21 14:43:50,495 INFO L226 Difference]: Without dead ends: 394 [2020-08-21 14:43:50,497 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-08-21 14:43:50,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2020-08-21 14:43:50,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 293. [2020-08-21 14:43:50,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 293 states. [2020-08-21 14:43:50,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 337 transitions. [2020-08-21 14:43:50,561 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 337 transitions. Word has length 83 [2020-08-21 14:43:50,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:43:50,562 INFO L479 AbstractCegarLoop]: Abstraction has 293 states and 337 transitions. [2020-08-21 14:43:50,562 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 14:43:50,562 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 337 transitions. [2020-08-21 14:43:50,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-08-21 14:43:50,563 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:43:50,564 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:43:50,564 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 14:43:50,564 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:43:50,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:43:50,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1016327824, now seen corresponding path program 1 times [2020-08-21 14:43:50,565 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:43:50,565 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [460014110] [2020-08-21 14:43:50,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:43:50,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:50,840 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 14:43:50,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:43:50,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:50,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:43:50,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:50,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 14:43:50,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:50,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:43:50,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:50,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 14:43:50,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:50,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 14:43:50,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:50,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-21 14:43:50,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:50,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-21 14:43:50,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:50,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:43:50,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:50,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:43:50,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:50,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 14:43:50,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:50,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-08-21 14:43:50,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:50,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-08-21 14:43:50,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:50,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:43:50,994 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [460014110] [2020-08-21 14:43:50,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:43:50,995 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-08-21 14:43:50,996 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397574115] [2020-08-21 14:43:50,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 14:43:50,998 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:43:50,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 14:43:50,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-08-21 14:43:50,999 INFO L87 Difference]: Start difference. First operand 293 states and 337 transitions. Second operand 12 states. [2020-08-21 14:43:51,482 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 14:43:51,740 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 14:43:51,980 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 14:43:52,596 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 14:43:52,864 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 14:43:53,098 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 14:43:54,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:43:54,005 INFO L93 Difference]: Finished difference Result 673 states and 863 transitions. [2020-08-21 14:43:54,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 14:43:54,005 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 83 [2020-08-21 14:43:54,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:43:54,010 INFO L225 Difference]: With dead ends: 673 [2020-08-21 14:43:54,010 INFO L226 Difference]: Without dead ends: 408 [2020-08-21 14:43:54,011 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-08-21 14:43:54,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2020-08-21 14:43:54,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 301. [2020-08-21 14:43:54,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2020-08-21 14:43:54,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 345 transitions. [2020-08-21 14:43:54,077 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 345 transitions. Word has length 83 [2020-08-21 14:43:54,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:43:54,077 INFO L479 AbstractCegarLoop]: Abstraction has 301 states and 345 transitions. [2020-08-21 14:43:54,078 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 14:43:54,078 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 345 transitions. [2020-08-21 14:43:54,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-08-21 14:43:54,079 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:43:54,079 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:43:54,080 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 14:43:54,080 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:43:54,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:43:54,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1094962545, now seen corresponding path program 1 times [2020-08-21 14:43:54,080 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:43:54,081 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1329919644] [2020-08-21 14:43:54,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:43:54,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:54,346 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 14:43:54,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:43:54,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:54,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:43:54,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:54,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 14:43:54,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:54,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:43:54,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:54,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 14:43:54,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:54,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 14:43:54,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:54,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-21 14:43:54,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:54,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-21 14:43:54,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:54,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:43:54,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:54,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:43:54,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:54,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 14:43:54,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:54,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-08-21 14:43:54,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:54,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-08-21 14:43:54,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:54,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:43:54,484 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1329919644] [2020-08-21 14:43:54,484 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:43:54,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 14:43:54,485 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915697159] [2020-08-21 14:43:54,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 14:43:54,485 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:43:54,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 14:43:54,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-08-21 14:43:54,486 INFO L87 Difference]: Start difference. First operand 301 states and 345 transitions. Second operand 8 states. [2020-08-21 14:43:54,862 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 14:43:55,416 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 14:43:57,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:43:57,306 INFO L93 Difference]: Finished difference Result 972 states and 1282 transitions. [2020-08-21 14:43:57,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-21 14:43:57,306 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 83 [2020-08-21 14:43:57,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:43:57,311 INFO L225 Difference]: With dead ends: 972 [2020-08-21 14:43:57,312 INFO L226 Difference]: Without dead ends: 699 [2020-08-21 14:43:57,313 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2020-08-21 14:43:57,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2020-08-21 14:43:57,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 567. [2020-08-21 14:43:57,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 567 states. [2020-08-21 14:43:57,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 673 transitions. [2020-08-21 14:43:57,476 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 673 transitions. Word has length 83 [2020-08-21 14:43:57,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:43:57,476 INFO L479 AbstractCegarLoop]: Abstraction has 567 states and 673 transitions. [2020-08-21 14:43:57,476 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 14:43:57,476 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 673 transitions. [2020-08-21 14:43:57,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-08-21 14:43:57,478 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:43:57,478 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:43:57,479 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 14:43:57,479 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:43:57,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:43:57,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1057623401, now seen corresponding path program 1 times [2020-08-21 14:43:57,480 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:43:57,480 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [394372333] [2020-08-21 14:43:57,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:43:57,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:57,845 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 14:43:57,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:43:57,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:57,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:43:57,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:57,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 14:43:57,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:57,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:43:57,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:57,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 14:43:57,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:57,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 14:43:57,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:57,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-21 14:43:57,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:57,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-21 14:43:57,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:57,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-21 14:43:57,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:57,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:43:57,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:57,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:43:57,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:57,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 14:43:57,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:57,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-21 14:43:57,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:57,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-08-21 14:43:57,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:43:57,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:43:57,944 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [394372333] [2020-08-21 14:43:57,944 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:43:57,944 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 14:43:57,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124427195] [2020-08-21 14:43:57,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 14:43:57,945 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:43:57,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 14:43:57,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-21 14:43:57,946 INFO L87 Difference]: Start difference. First operand 567 states and 673 transitions. Second operand 8 states. [2020-08-21 14:43:58,309 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 14:44:00,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:44:00,139 INFO L93 Difference]: Finished difference Result 1114 states and 1455 transitions. [2020-08-21 14:44:00,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-21 14:44:00,140 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 87 [2020-08-21 14:44:00,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:44:00,149 INFO L225 Difference]: With dead ends: 1114 [2020-08-21 14:44:00,150 INFO L226 Difference]: Without dead ends: 1111 [2020-08-21 14:44:00,151 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=149, Invalid=403, Unknown=0, NotChecked=0, Total=552 [2020-08-21 14:44:00,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1111 states. [2020-08-21 14:44:00,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1111 to 919. [2020-08-21 14:44:00,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 919 states. [2020-08-21 14:44:00,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1098 transitions. [2020-08-21 14:44:00,342 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1098 transitions. Word has length 87 [2020-08-21 14:44:00,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:44:00,345 INFO L479 AbstractCegarLoop]: Abstraction has 919 states and 1098 transitions. [2020-08-21 14:44:00,345 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 14:44:00,345 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1098 transitions. [2020-08-21 14:44:00,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-08-21 14:44:00,353 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:44:00,354 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:44:00,354 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 14:44:00,354 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:44:00,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:44:00,354 INFO L82 PathProgramCache]: Analyzing trace with hash -2007066912, now seen corresponding path program 1 times [2020-08-21 14:44:00,355 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:44:00,358 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [125155340] [2020-08-21 14:44:00,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:44:00,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 14:44:00,446 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 14:44:00,447 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 14:44:00,451 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 14:44:00,499 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 02:44:00 BoogieIcfgContainer [2020-08-21 14:44:00,499 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 14:44:00,504 INFO L168 Benchmark]: Toolchain (without parser) took 31023.33 ms. Allocated memory was 140.5 MB in the beginning and 620.8 MB in the end (delta: 480.2 MB). Free memory was 101.1 MB in the beginning and 337.8 MB in the end (delta: -236.7 MB). Peak memory consumption was 243.5 MB. Max. memory is 7.1 GB. [2020-08-21 14:44:00,505 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 140.5 MB. Free memory was 120.7 MB in the beginning and 120.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-21 14:44:00,512 INFO L168 Benchmark]: CACSL2BoogieTranslator took 677.33 ms. Allocated memory was 140.5 MB in the beginning and 201.9 MB in the end (delta: 61.3 MB). Free memory was 100.9 MB in the beginning and 168.1 MB in the end (delta: -67.2 MB). Peak memory consumption was 22.8 MB. Max. memory is 7.1 GB. [2020-08-21 14:44:00,514 INFO L168 Benchmark]: Boogie Preprocessor took 129.77 ms. Allocated memory is still 201.9 MB. Free memory was 168.1 MB in the beginning and 164.2 MB in the end (delta: 3.9 MB). Peak memory consumption was 3.9 MB. Max. memory is 7.1 GB. [2020-08-21 14:44:00,518 INFO L168 Benchmark]: RCFGBuilder took 1204.93 ms. Allocated memory was 201.9 MB in the beginning and 236.5 MB in the end (delta: 34.6 MB). Free memory was 164.2 MB in the beginning and 195.9 MB in the end (delta: -31.7 MB). Peak memory consumption was 80.3 MB. Max. memory is 7.1 GB. [2020-08-21 14:44:00,521 INFO L168 Benchmark]: TraceAbstraction took 29005.51 ms. Allocated memory was 236.5 MB in the beginning and 620.8 MB in the end (delta: 384.3 MB). Free memory was 194.5 MB in the beginning and 337.8 MB in the end (delta: -143.3 MB). Peak memory consumption was 241.0 MB. Max. memory is 7.1 GB. [2020-08-21 14:44:00,531 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 140.5 MB. Free memory was 120.7 MB in the beginning and 120.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 677.33 ms. Allocated memory was 140.5 MB in the beginning and 201.9 MB in the end (delta: 61.3 MB). Free memory was 100.9 MB in the beginning and 168.1 MB in the end (delta: -67.2 MB). Peak memory consumption was 22.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 129.77 ms. Allocated memory is still 201.9 MB. Free memory was 168.1 MB in the beginning and 164.2 MB in the end (delta: 3.9 MB). Peak memory consumption was 3.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1204.93 ms. Allocated memory was 201.9 MB in the beginning and 236.5 MB in the end (delta: 34.6 MB). Free memory was 164.2 MB in the beginning and 195.9 MB in the end (delta: -31.7 MB). Peak memory consumption was 80.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 29005.51 ms. Allocated memory was 236.5 MB in the beginning and 620.8 MB in the end (delta: 384.3 MB). Free memory was 194.5 MB in the beginning and 337.8 MB in the end (delta: -143.3 MB). Peak memory consumption was 241.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 284]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L85] int waterLevel = 1; [L86] int methaneLevelCritical = 0; [L179] int cleanupTimeShifts = 4; [L292] int pumpRunning = 0; [L293] int systemActive = 1; [L679] static struct __ACC__ERR *head = (struct __ACC__ERR *)0; [L876] int methAndRunningLastTime ; [L257] int retValue_acc ; [L258] int tmp ; [L262] FCALL select_helpers() [L263] FCALL select_features() [L264] CALL, EXPR valid_product() [L69] int retValue_acc ; [L72] retValue_acc = 1 [L73] return (retValue_acc); [L264] RET, EXPR valid_product() [L264] tmp = valid_product() [L266] COND TRUE \read(tmp) [L268] FCALL setup() [L269] CALL runTest() [L250] CALL __utac_acc__Specification2_spec__1() [L881] methAndRunningLastTime = 0 [L250] RET __utac_acc__Specification2_spec__1() [L251] CALL test() [L446] int splverifierCounter ; [L447] int tmp ; [L448] int tmp___0 ; [L449] int tmp___1 ; [L450] int tmp___2 ; [L453] splverifierCounter = 0 [L455] COND TRUE 1 [L457] COND TRUE splverifierCounter < 4 [L463] tmp = __VERIFIER_nondet_int() [L465] COND TRUE \read(tmp) [L467] CALL waterRise() [L103] COND TRUE waterLevel < 2 [L104] waterLevel = waterLevel + 1 [L467] RET waterRise() [L473] tmp___0 = __VERIFIER_nondet_int() [L475] COND TRUE \read(tmp___0) [L477] CALL changeMethaneLevel() [L115] COND FALSE !(\read(methaneLevelCritical)) [L118] methaneLevelCritical = 1 [L477] RET changeMethaneLevel() [L483] tmp___2 = __VERIFIER_nondet_int() [L485] COND TRUE \read(tmp___2) [L498] CALL timeShift() [L300] COND FALSE !(\read(pumpRunning)) [L307] COND TRUE \read(systemActive) [L309] CALL processEnvironment() [L329] int tmp ; [L332] COND TRUE ! pumpRunning [L334] CALL, EXPR isHighWaterLevel() [L426] int retValue_acc ; [L427] int tmp ; [L428] int tmp___0 ; [L432] CALL, EXPR isHighWaterSensorDry() [L165] int retValue_acc ; [L168] COND FALSE !(waterLevel < 2) [L172] retValue_acc = 0 [L173] return (retValue_acc); [L432] RET, EXPR isHighWaterSensorDry() [L432] tmp = isHighWaterSensorDry() [L434] COND FALSE !(\read(tmp)) [L437] tmp___0 = 1 [L439] retValue_acc = tmp___0 [L440] return (retValue_acc); [L334] RET, EXPR isHighWaterLevel() [L334] tmp = isHighWaterLevel() [L336] COND TRUE \read(tmp) [L338] CALL activatePump() [L357] pumpRunning = 1 [L338] RET activatePump() [L309] RET processEnvironment() [L315] CALL __utac_acc__Specification2_spec__2() [L886] int tmp ; [L887] int tmp___0 ; [L891] CALL, EXPR isMethaneLevelCritical() [L124] int retValue_acc ; [L127] retValue_acc = methaneLevelCritical [L128] return (retValue_acc); [L891] RET, EXPR isMethaneLevelCritical() [L891] tmp = isMethaneLevelCritical() [L893] COND TRUE \read(tmp) [L895] CALL, EXPR isPumpRunning() [L381] int retValue_acc ; [L384] retValue_acc = pumpRunning [L385] return (retValue_acc); [L895] RET, EXPR isPumpRunning() [L895] tmp___0 = isPumpRunning() [L897] COND TRUE \read(tmp___0) [L898] COND FALSE !(\read(methAndRunningLastTime)) [L903] methAndRunningLastTime = 1 [L315] RET __utac_acc__Specification2_spec__2() [L498] RET timeShift() [L455] COND TRUE 1 [L457] COND TRUE splverifierCounter < 4 [L463] tmp = __VERIFIER_nondet_int() [L465] COND FALSE !(\read(tmp)) [L473] tmp___0 = __VERIFIER_nondet_int() [L475] COND FALSE !(\read(tmp___0)) [L483] tmp___2 = __VERIFIER_nondet_int() [L485] COND TRUE \read(tmp___2) [L498] CALL timeShift() [L300] COND TRUE \read(pumpRunning) [L302] CALL lowerWaterLevel() [L91] COND TRUE waterLevel > 0 [L92] waterLevel = waterLevel - 1 [L302] RET lowerWaterLevel() [L307] COND TRUE \read(systemActive) [L309] CALL processEnvironment() [L329] int tmp ; [L332] COND FALSE !(! pumpRunning) [L347] FCALL processEnvironment__wrappee__base() [L309] RET processEnvironment() [L315] CALL __utac_acc__Specification2_spec__2() [L886] int tmp ; [L887] int tmp___0 ; [L891] CALL, EXPR isMethaneLevelCritical() [L124] int retValue_acc ; [L127] retValue_acc = methaneLevelCritical [L128] return (retValue_acc); [L891] RET, EXPR isMethaneLevelCritical() [L891] tmp = isMethaneLevelCritical() [L893] COND TRUE \read(tmp) [L895] CALL, EXPR isPumpRunning() [L381] int retValue_acc ; [L384] retValue_acc = pumpRunning [L385] return (retValue_acc); [L895] RET, EXPR isPumpRunning() [L895] tmp___0 = isPumpRunning() [L897] COND TRUE \read(tmp___0) [L898] COND TRUE \read(methAndRunningLastTime) [L900] CALL __automaton_fail() [L284] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 38 procedures, 220 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 28.8s, OverallIterations: 11, TraceHistogramMax: 2, AutomataDifference: 23.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 973 SDtfs, 2411 SDslu, 1145 SDs, 0 SdLazy, 4899 SolverSat, 1528 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 12.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 413 GetRequests, 259 SyntacticMatches, 3 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 536 ImplicationChecksByTransitivity, 10.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=919occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.8s AutomataMinimizationTime, 10 MinimizatonAttempts, 841 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 3.9s InterpolantComputationTime, 848 NumberOfCodeBlocks, 848 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 709 ConstructedInterpolants, 0 QuantifiedInterpolants, 223096 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 10 InterpolantComputations, 10 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...