/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --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_spec1_product52.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 19:31:39,092 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 19:31:39,094 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 19:31:39,116 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 19:31:39,117 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 19:31:39,118 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 19:31:39,119 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 19:31:39,121 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 19:31:39,122 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 19:31:39,123 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 19:31:39,124 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 19:31:39,125 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 19:31:39,125 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 19:31:39,126 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 19:31:39,127 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 19:31:39,128 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 19:31:39,129 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 19:31:39,130 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 19:31:39,131 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 19:31:39,133 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 19:31:39,134 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 19:31:39,135 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 19:31:39,136 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 19:31:39,137 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 19:31:39,139 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 19:31:39,140 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 19:31:39,140 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 19:31:39,141 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 19:31:39,141 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 19:31:39,142 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 19:31:39,142 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 19:31:39,143 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 19:31:39,144 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 19:31:39,144 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 19:31:39,145 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 19:31:39,145 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 19:31:39,146 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 19:31:39,146 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 19:31:39,146 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 19:31:39,147 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 19:31:39,148 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 19:31:39,149 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 19:31:39,170 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 19:31:39,170 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 19:31:39,171 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 19:31:39,171 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 19:31:39,172 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 19:31:39,172 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 19:31:39,172 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 19:31:39,172 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 19:31:39,173 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 19:31:39,173 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 19:31:39,173 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 19:31:39,173 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 19:31:39,173 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 19:31:39,174 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 19:31:39,174 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 19:31:39,174 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 19:31:39,174 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 19:31:39,174 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 19:31:39,175 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 19:31:39,175 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 19:31:39,175 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 19:31:39,175 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 19:31:39,175 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 19:31:39,176 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 19:31:39,176 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 19:31:39,176 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 19:31:39,176 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 19:31:39,176 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 19:31:39,177 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 19:31:39,177 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true; [2020-08-21 19:31:39,456 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 19:31:39,469 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 19:31:39,472 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 19:31:39,474 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 19:31:39,474 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 19:31:39,475 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec1_product52.cil.c [2020-08-21 19:31:39,552 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7687cd4bf/eaf6a69d2c074b259504c50afb6bf546/FLAGc4d53a51b [2020-08-21 19:31:40,076 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 19:31:40,077 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/product-lines/minepump_spec1_product52.cil.c [2020-08-21 19:31:40,092 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7687cd4bf/eaf6a69d2c074b259504c50afb6bf546/FLAGc4d53a51b [2020-08-21 19:31:40,369 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7687cd4bf/eaf6a69d2c074b259504c50afb6bf546 [2020-08-21 19:31:40,377 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 19:31:40,379 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 19:31:40,380 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 19:31:40,380 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 19:31:40,383 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 19:31:40,384 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 07:31:40" (1/1) ... [2020-08-21 19:31:40,387 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fa7080 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:31:40, skipping insertion in model container [2020-08-21 19:31:40,387 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 07:31:40" (1/1) ... [2020-08-21 19:31:40,396 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 19:31:40,447 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 19:31:40,789 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 19:31:40,803 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 19:31:40,998 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 19:31:41,033 INFO L208 MainTranslator]: Completed translation [2020-08-21 19:31:41,033 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:31:41 WrapperNode [2020-08-21 19:31:41,033 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 19:31:41,034 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 19:31:41,034 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 19:31:41,034 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 19:31:41,044 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:31:41" (1/1) ... [2020-08-21 19:31:41,045 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:31:41" (1/1) ... [2020-08-21 19:31:41,069 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:31:41" (1/1) ... [2020-08-21 19:31:41,070 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:31:41" (1/1) ... [2020-08-21 19:31:41,102 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:31:41" (1/1) ... [2020-08-21 19:31:41,113 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:31:41" (1/1) ... [2020-08-21 19:31:41,118 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:31:41" (1/1) ... [2020-08-21 19:31:41,126 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 19:31:41,127 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 19:31:41,127 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 19:31:41,127 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 19:31:41,128 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:31:41" (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 19:31:41,192 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 19:31:41,193 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 19:31:41,193 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2020-08-21 19:31:41,193 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2020-08-21 19:31:41,194 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2020-08-21 19:31:41,194 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2020-08-21 19:31:41,195 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2020-08-21 19:31:41,195 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2020-08-21 19:31:41,195 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2020-08-21 19:31:41,196 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2020-08-21 19:31:41,196 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterSensorDry [2020-08-21 19:31:41,196 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2020-08-21 19:31:41,196 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2020-08-21 19:31:41,197 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2020-08-21 19:31:41,197 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2020-08-21 19:31:41,197 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2020-08-21 19:31:41,198 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2020-08-21 19:31:41,198 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2020-08-21 19:31:41,198 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2020-08-21 19:31:41,199 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2020-08-21 19:31:41,199 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2020-08-21 19:31:41,199 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterLevel [2020-08-21 19:31:41,200 INFO L138 BoogieDeclarations]: Found implementation of procedure stopSystem [2020-08-21 19:31:41,200 INFO L138 BoogieDeclarations]: Found implementation of procedure startSystem [2020-08-21 19:31:41,200 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2020-08-21 19:31:41,202 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2020-08-21 19:31:41,202 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2020-08-21 19:31:41,202 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2020-08-21 19:31:41,203 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2020-08-21 19:31:41,203 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2020-08-21 19:31:41,203 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 19:31:41,203 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__1 [2020-08-21 19:31:41,203 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2020-08-21 19:31:41,203 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2020-08-21 19:31:41,203 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2020-08-21 19:31:41,203 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2020-08-21 19:31:41,204 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2020-08-21 19:31:41,204 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2020-08-21 19:31:41,204 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2020-08-21 19:31:41,204 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2020-08-21 19:31:41,204 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2020-08-21 19:31:41,204 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2020-08-21 19:31:41,204 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 19:31:41,204 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 19:31:41,205 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-08-21 19:31:41,205 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2020-08-21 19:31:41,205 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2020-08-21 19:31:41,205 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2020-08-21 19:31:41,205 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2020-08-21 19:31:41,205 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2020-08-21 19:31:41,205 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2020-08-21 19:31:41,205 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2020-08-21 19:31:41,205 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterSensorDry [2020-08-21 19:31:41,205 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 19:31:41,206 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2020-08-21 19:31:41,206 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2020-08-21 19:31:41,206 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2020-08-21 19:31:41,206 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2020-08-21 19:31:41,206 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2020-08-21 19:31:41,206 INFO L130 BoogieDeclarations]: Found specification of procedure stopSystem [2020-08-21 19:31:41,206 INFO L130 BoogieDeclarations]: Found specification of procedure startSystem [2020-08-21 19:31:41,207 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__1 [2020-08-21 19:31:41,207 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2020-08-21 19:31:41,207 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2020-08-21 19:31:41,207 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2020-08-21 19:31:41,207 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2020-08-21 19:31:41,207 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterLevel [2020-08-21 19:31:41,207 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2020-08-21 19:31:41,207 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2020-08-21 19:31:41,207 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2020-08-21 19:31:41,207 INFO L130 BoogieDeclarations]: Found specification of procedure test [2020-08-21 19:31:41,208 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2020-08-21 19:31:41,208 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2020-08-21 19:31:41,208 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2020-08-21 19:31:41,208 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2020-08-21 19:31:41,208 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2020-08-21 19:31:41,208 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2020-08-21 19:31:41,209 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 19:31:41,209 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-08-21 19:31:41,209 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-21 19:31:41,209 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-21 19:31:41,209 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2020-08-21 19:31:41,209 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-21 19:31:41,209 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-21 19:31:41,210 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 19:31:41,210 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-21 19:31:41,210 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2020-08-21 19:31:41,210 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 19:31:41,210 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2020-08-21 19:31:41,210 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2020-08-21 19:31:41,210 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 19:31:41,211 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2020-08-21 19:31:41,211 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2020-08-21 19:31:41,211 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2020-08-21 19:31:41,211 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2020-08-21 19:31:41,211 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 19:31:41,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-21 19:31:41,211 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 19:31:44,342 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 19:31:44,342 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-08-21 19:31:44,347 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 07:31:44 BoogieIcfgContainer [2020-08-21 19:31:44,348 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 19:31:44,349 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 19:31:44,349 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 19:31:44,352 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 19:31:44,353 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 07:31:40" (1/3) ... [2020-08-21 19:31:44,353 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@535b6a2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 07:31:44, skipping insertion in model container [2020-08-21 19:31:44,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:31:41" (2/3) ... [2020-08-21 19:31:44,354 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@535b6a2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 07:31:44, skipping insertion in model container [2020-08-21 19:31:44,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 07:31:44" (3/3) ... [2020-08-21 19:31:44,356 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec1_product52.cil.c [2020-08-21 19:31:44,366 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 19:31:44,374 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 19:31:44,388 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 19:31:44,410 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 19:31:44,410 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 19:31:44,411 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 19:31:44,411 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 19:31:44,411 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 19:31:44,412 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 19:31:44,412 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 19:31:44,412 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 19:31:44,441 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states. [2020-08-21 19:31:44,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-21 19:31:44,451 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:31:44,452 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 19:31:44,452 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:31:44,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:31:44,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1875422794, now seen corresponding path program 1 times [2020-08-21 19:31:44,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:31:44,468 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1833515905] [2020-08-21 19:31:44,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:31:44,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:31:45,127 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 19:31:45,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:31:45,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:31:45,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 19:31:45,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:31:45,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 19:31:45,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:31:45,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 19:31:45,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:31:45,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 19:31:45,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:31:45,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-21 19:31:45,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:31:45,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-21 19:31:45,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:31:45,272 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 19:31:45,273 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1833515905] [2020-08-21 19:31:45,275 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:31:45,275 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 19:31:45,276 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415328210] [2020-08-21 19:31:45,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 19:31:45,282 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:31:45,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 19:31:45,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 19:31:45,300 INFO L87 Difference]: Start difference. First operand 184 states. Second operand 3 states. [2020-08-21 19:31:46,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:31:46,600 INFO L93 Difference]: Finished difference Result 320 states and 417 transitions. [2020-08-21 19:31:46,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 19:31:46,603 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 46 [2020-08-21 19:31:46,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:31:46,629 INFO L225 Difference]: With dead ends: 320 [2020-08-21 19:31:46,629 INFO L226 Difference]: Without dead ends: 173 [2020-08-21 19:31:46,636 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 19:31:46,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-08-21 19:31:46,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 138. [2020-08-21 19:31:46,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-08-21 19:31:46,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 162 transitions. [2020-08-21 19:31:46,755 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 162 transitions. Word has length 46 [2020-08-21 19:31:46,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:31:46,756 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 162 transitions. [2020-08-21 19:31:46,756 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 19:31:46,756 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 162 transitions. [2020-08-21 19:31:46,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-08-21 19:31:46,760 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:31:46,760 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 19:31:46,760 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 19:31:46,761 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:31:46,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:31:46,761 INFO L82 PathProgramCache]: Analyzing trace with hash -2108875382, now seen corresponding path program 1 times [2020-08-21 19:31:46,761 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:31:46,762 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [803110426] [2020-08-21 19:31:46,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:31:46,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:31:47,086 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 19:31:47,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:31:47,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:31:47,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 19:31:47,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:31:47,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 19:31:47,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:31:47,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 19:31:47,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:31:47,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 19:31:47,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:31:47,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 19:31:47,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:31:47,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-21 19:31:47,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:31:47,126 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 19:31:47,127 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [803110426] [2020-08-21 19:31:47,127 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:31:47,127 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 19:31:47,128 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026541202] [2020-08-21 19:31:47,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 19:31:47,130 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:31:47,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 19:31:47,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 19:31:47,130 INFO L87 Difference]: Start difference. First operand 138 states and 162 transitions. Second operand 4 states. [2020-08-21 19:31:47,608 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 19:31:48,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:31:48,527 INFO L93 Difference]: Finished difference Result 243 states and 296 transitions. [2020-08-21 19:31:48,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 19:31:48,528 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2020-08-21 19:31:48,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:31:48,531 INFO L225 Difference]: With dead ends: 243 [2020-08-21 19:31:48,532 INFO L226 Difference]: Without dead ends: 157 [2020-08-21 19:31:48,533 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-21 19:31:48,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-08-21 19:31:48,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 129. [2020-08-21 19:31:48,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-08-21 19:31:48,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 150 transitions. [2020-08-21 19:31:48,569 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 150 transitions. Word has length 47 [2020-08-21 19:31:48,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:31:48,570 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 150 transitions. [2020-08-21 19:31:48,570 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 19:31:48,570 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 150 transitions. [2020-08-21 19:31:48,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-21 19:31:48,572 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:31:48,573 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 19:31:48,573 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 19:31:48,573 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:31:48,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:31:48,573 INFO L82 PathProgramCache]: Analyzing trace with hash -2135499519, now seen corresponding path program 1 times [2020-08-21 19:31:48,574 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:31:48,574 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [137324260] [2020-08-21 19:31:48,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:31:48,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:31:48,905 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 19:31:48,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:31:48,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:31:48,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 19:31:48,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:31:48,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 19:31:48,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:31:48,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 19:31:48,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:31:48,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 19:31:48,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:31:48,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-21 19:31:48,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:31:48,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-21 19:31:48,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:31:49,001 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 19:31:49,002 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [137324260] [2020-08-21 19:31:49,002 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:31:49,002 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 19:31:49,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686643756] [2020-08-21 19:31:49,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 19:31:49,008 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:31:49,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 19:31:49,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-21 19:31:49,009 INFO L87 Difference]: Start difference. First operand 129 states and 150 transitions. Second operand 8 states. [2020-08-21 19:31:49,450 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 19:31:49,752 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 19:31:50,035 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 19:31:50,280 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 19:31:51,025 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 19:31:52,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:31:52,908 INFO L93 Difference]: Finished difference Result 442 states and 547 transitions. [2020-08-21 19:31:52,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 19:31:52,914 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 52 [2020-08-21 19:31:52,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:31:52,920 INFO L225 Difference]: With dead ends: 442 [2020-08-21 19:31:52,920 INFO L226 Difference]: Without dead ends: 337 [2020-08-21 19:31:52,922 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-08-21 19:31:52,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2020-08-21 19:31:52,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 272. [2020-08-21 19:31:52,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2020-08-21 19:31:52,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 328 transitions. [2020-08-21 19:31:52,994 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 328 transitions. Word has length 52 [2020-08-21 19:31:52,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:31:52,994 INFO L479 AbstractCegarLoop]: Abstraction has 272 states and 328 transitions. [2020-08-21 19:31:52,994 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 19:31:52,994 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 328 transitions. [2020-08-21 19:31:52,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-21 19:31:52,997 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:31:52,997 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 19:31:52,998 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 19:31:52,998 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:31:52,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:31:52,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1973278076, now seen corresponding path program 1 times [2020-08-21 19:31:52,998 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:31:52,999 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2049053850] [2020-08-21 19:31:52,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:31:53,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:31:53,285 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 19:31:53,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:31:53,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:31:53,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 19:31:53,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:31:53,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 19:31:53,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:31:53,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 19:31:53,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:31:53,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 19:31:53,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:31:53,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 19:31:53,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:31:53,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-21 19:31:53,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:31:53,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-21 19:31:53,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:31:53,418 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 19:31:53,418 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2049053850] [2020-08-21 19:31:53,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:31:53,419 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 19:31:53,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195059997] [2020-08-21 19:31:53,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 19:31:53,419 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:31:53,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 19:31:53,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-21 19:31:53,420 INFO L87 Difference]: Start difference. First operand 272 states and 328 transitions. Second operand 8 states. [2020-08-21 19:31:53,816 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 19:31:54,792 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 19:31:55,148 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 19:31:55,449 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 19:31:55,731 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 19:31:56,158 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 19:31:57,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:31:57,135 INFO L93 Difference]: Finished difference Result 877 states and 1135 transitions. [2020-08-21 19:31:57,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 19:31:57,138 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 57 [2020-08-21 19:31:57,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:31:57,145 INFO L225 Difference]: With dead ends: 877 [2020-08-21 19:31:57,145 INFO L226 Difference]: Without dead ends: 629 [2020-08-21 19:31:57,147 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2020-08-21 19:31:57,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2020-08-21 19:31:57,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 499. [2020-08-21 19:31:57,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 499 states. [2020-08-21 19:31:57,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 606 transitions. [2020-08-21 19:31:57,291 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 606 transitions. Word has length 57 [2020-08-21 19:31:57,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:31:57,292 INFO L479 AbstractCegarLoop]: Abstraction has 499 states and 606 transitions. [2020-08-21 19:31:57,292 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 19:31:57,292 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 606 transitions. [2020-08-21 19:31:57,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-21 19:31:57,296 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:31:57,296 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] [2020-08-21 19:31:57,296 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 19:31:57,297 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:31:57,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:31:57,297 INFO L82 PathProgramCache]: Analyzing trace with hash -820899264, now seen corresponding path program 1 times [2020-08-21 19:31:57,297 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:31:57,298 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [895711510] [2020-08-21 19:31:57,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:31:57,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:31:57,633 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 19:31:57,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:31:57,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:31:57,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 19:31:57,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:31:57,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 19:31:57,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:31:57,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 19:31:57,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:31:57,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 19:31:57,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:31:57,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 19:31:57,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:31:57,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 19:31:57,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:31:57,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-21 19:31:57,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:31:57,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-21 19:31:57,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:31:57,716 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 19:31:57,717 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [895711510] [2020-08-21 19:31:57,717 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:31:57,717 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-21 19:31:57,718 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175256097] [2020-08-21 19:31:57,718 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 19:31:57,718 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:31:57,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 19:31:57,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-21 19:31:57,719 INFO L87 Difference]: Start difference. First operand 499 states and 606 transitions. Second operand 9 states. [2020-08-21 19:31:58,227 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 19:31:59,143 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 19:31:59,431 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 19:31:59,661 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 19:32:00,216 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 19:32:00,518 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 19:32:01,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:32:01,532 INFO L93 Difference]: Finished difference Result 1401 states and 1876 transitions. [2020-08-21 19:32:01,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-21 19:32:01,532 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 61 [2020-08-21 19:32:01,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:32:01,540 INFO L225 Difference]: With dead ends: 1401 [2020-08-21 19:32:01,540 INFO L226 Difference]: Without dead ends: 926 [2020-08-21 19:32:01,543 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-08-21 19:32:01,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2020-08-21 19:32:01,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 739. [2020-08-21 19:32:01,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 739 states. [2020-08-21 19:32:01,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 739 states to 739 states and 907 transitions. [2020-08-21 19:32:01,675 INFO L78 Accepts]: Start accepts. Automaton has 739 states and 907 transitions. Word has length 61 [2020-08-21 19:32:01,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:32:01,676 INFO L479 AbstractCegarLoop]: Abstraction has 739 states and 907 transitions. [2020-08-21 19:32:01,676 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 19:32:01,676 INFO L276 IsEmpty]: Start isEmpty. Operand 739 states and 907 transitions. [2020-08-21 19:32:01,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-08-21 19:32:01,678 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:32:01,679 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 19:32:01,679 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 19:32:01,679 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:32:01,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:32:01,679 INFO L82 PathProgramCache]: Analyzing trace with hash 16386475, now seen corresponding path program 1 times [2020-08-21 19:32:01,680 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:32:01,680 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1397326125] [2020-08-21 19:32:01,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:32:01,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:32:01,945 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 19:32:01,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:32:01,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:32:01,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 19:32:01,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:32:01,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 19:32:01,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:32:01,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 19:32:01,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:32:01,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 19:32:01,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:32:02,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 19:32:02,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:32:02,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 19:32:02,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:32:02,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:32:02,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:32:02,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:32:02,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:32:02,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 19:32:02,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:32:02,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 19:32:02,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:32:02,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-08-21 19:32:02,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:32:02,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-21 19:32:02,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:32:02,096 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 19:32:02,096 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1397326125] [2020-08-21 19:32:02,096 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:32:02,097 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-21 19:32:02,097 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934308415] [2020-08-21 19:32:02,097 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 19:32:02,098 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:32:02,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 19:32:02,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-21 19:32:02,098 INFO L87 Difference]: Start difference. First operand 739 states and 907 transitions. Second operand 9 states. [2020-08-21 19:32:03,276 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 19:32:03,504 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 19:32:03,764 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 19:32:03,993 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 19:32:05,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:32:05,007 INFO L93 Difference]: Finished difference Result 1717 states and 2277 transitions. [2020-08-21 19:32:05,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 19:32:05,008 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 84 [2020-08-21 19:32:05,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:32:05,017 INFO L225 Difference]: With dead ends: 1717 [2020-08-21 19:32:05,018 INFO L226 Difference]: Without dead ends: 1002 [2020-08-21 19:32:05,021 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2020-08-21 19:32:05,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1002 states. [2020-08-21 19:32:05,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1002 to 765. [2020-08-21 19:32:05,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 765 states. [2020-08-21 19:32:05,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 765 states to 765 states and 935 transitions. [2020-08-21 19:32:05,142 INFO L78 Accepts]: Start accepts. Automaton has 765 states and 935 transitions. Word has length 84 [2020-08-21 19:32:05,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:32:05,143 INFO L479 AbstractCegarLoop]: Abstraction has 765 states and 935 transitions. [2020-08-21 19:32:05,143 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 19:32:05,143 INFO L276 IsEmpty]: Start isEmpty. Operand 765 states and 935 transitions. [2020-08-21 19:32:05,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-08-21 19:32:05,145 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:32:05,146 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 19:32:05,146 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 19:32:05,146 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:32:05,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:32:05,146 INFO L82 PathProgramCache]: Analyzing trace with hash 39018729, now seen corresponding path program 1 times [2020-08-21 19:32:05,147 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:32:05,147 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [98411074] [2020-08-21 19:32:05,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:32:05,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:32:05,391 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 19:32:05,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:32:05,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:32:05,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 19:32:05,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:32:05,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 19:32:05,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:32:05,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 19:32:05,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:32:05,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 19:32:05,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:32:05,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 19:32:05,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:32:05,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 19:32:05,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:32:05,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:32:05,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:32:05,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:32:05,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:32:05,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 19:32:05,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:32:05,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 19:32:05,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:32:05,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-08-21 19:32:05,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:32:05,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-21 19:32:05,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:32:05,551 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 19:32:05,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [98411074] [2020-08-21 19:32:05,553 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:32:05,553 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-21 19:32:05,553 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388855249] [2020-08-21 19:32:05,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 19:32:05,554 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:32:05,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 19:32:05,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-08-21 19:32:05,555 INFO L87 Difference]: Start difference. First operand 765 states and 935 transitions. Second operand 11 states. [2020-08-21 19:32:06,126 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 19:32:06,382 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 19:32:06,614 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 19:32:07,336 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 19:32:07,611 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 19:32:07,856 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 19:32:09,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:32:09,177 INFO L93 Difference]: Finished difference Result 1771 states and 2388 transitions. [2020-08-21 19:32:09,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 19:32:09,178 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 84 [2020-08-21 19:32:09,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:32:09,190 INFO L225 Difference]: With dead ends: 1771 [2020-08-21 19:32:09,190 INFO L226 Difference]: Without dead ends: 1030 [2020-08-21 19:32:09,195 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2020-08-21 19:32:09,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1030 states. [2020-08-21 19:32:09,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1030 to 781. [2020-08-21 19:32:09,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 781 states. [2020-08-21 19:32:09,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 951 transitions. [2020-08-21 19:32:09,395 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 951 transitions. Word has length 84 [2020-08-21 19:32:09,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:32:09,395 INFO L479 AbstractCegarLoop]: Abstraction has 781 states and 951 transitions. [2020-08-21 19:32:09,396 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 19:32:09,396 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 951 transitions. [2020-08-21 19:32:09,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-08-21 19:32:09,399 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:32:09,400 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 19:32:09,400 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 19:32:09,400 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:32:09,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:32:09,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1064510728, now seen corresponding path program 1 times [2020-08-21 19:32:09,401 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:32:09,401 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1909080504] [2020-08-21 19:32:09,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:32:09,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:32:09,675 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 19:32:09,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:32:09,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:32:09,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 19:32:09,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:32:09,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 19:32:09,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:32:09,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 19:32:09,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:32:09,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 19:32:09,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:32:09,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 19:32:09,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:32:09,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 19:32:09,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:32:09,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:32:09,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:32:09,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:32:09,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:32:09,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 19:32:09,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:32:09,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 19:32:09,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:32:09,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-08-21 19:32:09,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:32:09,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-21 19:32:09,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:32:09,824 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 19:32:09,824 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1909080504] [2020-08-21 19:32:09,824 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:32:09,824 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-21 19:32:09,825 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973134276] [2020-08-21 19:32:09,825 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 19:32:09,825 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:32:09,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 19:32:09,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-21 19:32:09,826 INFO L87 Difference]: Start difference. First operand 781 states and 951 transitions. Second operand 7 states. [2020-08-21 19:32:10,232 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 19:32:10,729 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 19:32:13,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:32:13,217 INFO L93 Difference]: Finished difference Result 2699 states and 3665 transitions. [2020-08-21 19:32:13,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 19:32:13,218 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 84 [2020-08-21 19:32:13,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:32:13,231 INFO L225 Difference]: With dead ends: 2699 [2020-08-21 19:32:13,232 INFO L226 Difference]: Without dead ends: 1942 [2020-08-21 19:32:13,236 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-08-21 19:32:13,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1942 states. [2020-08-21 19:32:13,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1942 to 1619. [2020-08-21 19:32:13,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1619 states. [2020-08-21 19:32:13,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1619 states to 1619 states and 1989 transitions. [2020-08-21 19:32:13,622 INFO L78 Accepts]: Start accepts. Automaton has 1619 states and 1989 transitions. Word has length 84 [2020-08-21 19:32:13,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:32:13,625 INFO L479 AbstractCegarLoop]: Abstraction has 1619 states and 1989 transitions. [2020-08-21 19:32:13,625 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 19:32:13,626 INFO L276 IsEmpty]: Start isEmpty. Operand 1619 states and 1989 transitions. [2020-08-21 19:32:13,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-08-21 19:32:13,628 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:32:13,629 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 19:32:13,629 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 19:32:13,629 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:32:13,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:32:13,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1546821858, now seen corresponding path program 1 times [2020-08-21 19:32:13,630 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:32:13,630 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1549085064] [2020-08-21 19:32:13,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:32:13,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 19:32:13,703 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 19:32:13,704 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 19:32:13,708 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 19:32:13,747 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 07:32:13 BoogieIcfgContainer [2020-08-21 19:32:13,748 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 19:32:13,750 INFO L168 Benchmark]: Toolchain (without parser) took 33371.13 ms. Allocated memory was 138.9 MB in the beginning and 639.6 MB in the end (delta: 500.7 MB). Free memory was 101.0 MB in the beginning and 109.2 MB in the end (delta: -8.2 MB). Peak memory consumption was 492.5 MB. Max. memory is 7.1 GB. [2020-08-21 19:32:13,750 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 19:32:13,754 INFO L168 Benchmark]: CACSL2BoogieTranslator took 653.96 ms. Allocated memory was 138.9 MB in the beginning and 202.4 MB in the end (delta: 63.4 MB). Free memory was 100.8 MB in the beginning and 172.4 MB in the end (delta: -71.6 MB). Peak memory consumption was 29.1 MB. Max. memory is 7.1 GB. [2020-08-21 19:32:13,758 INFO L168 Benchmark]: Boogie Preprocessor took 92.08 ms. Allocated memory is still 202.4 MB. Free memory was 172.4 MB in the beginning and 167.2 MB in the end (delta: 5.2 MB). Peak memory consumption was 5.2 MB. Max. memory is 7.1 GB. [2020-08-21 19:32:13,763 INFO L168 Benchmark]: RCFGBuilder took 3221.24 ms. Allocated memory was 202.4 MB in the beginning and 234.4 MB in the end (delta: 32.0 MB). Free memory was 167.2 MB in the beginning and 197.6 MB in the end (delta: -30.4 MB). Peak memory consumption was 86.0 MB. Max. memory is 7.1 GB. [2020-08-21 19:32:13,765 INFO L168 Benchmark]: TraceAbstraction took 29398.72 ms. Allocated memory was 234.4 MB in the beginning and 639.6 MB in the end (delta: 405.3 MB). Free memory was 196.2 MB in the beginning and 109.2 MB in the end (delta: 87.0 MB). Peak memory consumption was 492.3 MB. Max. memory is 7.1 GB. [2020-08-21 19:32:13,775 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 653.96 ms. Allocated memory was 138.9 MB in the beginning and 202.4 MB in the end (delta: 63.4 MB). Free memory was 100.8 MB in the beginning and 172.4 MB in the end (delta: -71.6 MB). Peak memory consumption was 29.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 92.08 ms. Allocated memory is still 202.4 MB. Free memory was 172.4 MB in the beginning and 167.2 MB in the end (delta: 5.2 MB). Peak memory consumption was 5.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 3221.24 ms. Allocated memory was 202.4 MB in the beginning and 234.4 MB in the end (delta: 32.0 MB). Free memory was 167.2 MB in the beginning and 197.6 MB in the end (delta: -30.4 MB). Peak memory consumption was 86.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 29398.72 ms. Allocated memory was 234.4 MB in the beginning and 639.6 MB in the end (delta: 405.3 MB). Free memory was 196.2 MB in the beginning and 109.2 MB in the end (delta: 87.0 MB). Peak memory consumption was 492.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 383]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L48] int waterLevel = 1; [L49] int methaneLevelCritical = 0; [L158] int pumpRunning = 0; [L159] int systemActive = 1; [L458] int cleanupTimeShifts = 4; [L752] static struct __ACC__ERR *head = (struct __ACC__ERR *)0; [L534] int retValue_acc ; [L535] int tmp ; [L539] FCALL select_helpers() [L540] FCALL select_features() [L541] CALL, EXPR valid_product() [L975] int retValue_acc ; [L978] retValue_acc = 1 [L979] return (retValue_acc); [L541] RET, EXPR valid_product() [L541] tmp = valid_product() [L543] COND TRUE \read(tmp) [L545] FCALL setup() [L546] CALL runTest() [L525] CALL test() [L390] int splverifierCounter ; [L391] int tmp ; [L392] int tmp___0 ; [L393] int tmp___1 ; [L394] int tmp___2 ; [L397] splverifierCounter = 0 [L399] COND TRUE 1 [L401] COND TRUE splverifierCounter < 4 [L407] tmp = __VERIFIER_nondet_int() [L409] COND TRUE \read(tmp) [L411] CALL waterRise() [L66] COND TRUE waterLevel < 2 [L67] waterLevel = waterLevel + 1 [L411] RET waterRise() [L417] tmp___0 = __VERIFIER_nondet_int() [L419] COND TRUE \read(tmp___0) [L421] CALL changeMethaneLevel() [L78] COND FALSE !(\read(methaneLevelCritical)) [L81] methaneLevelCritical = 1 [L421] RET changeMethaneLevel() [L427] tmp___2 = __VERIFIER_nondet_int() [L429] COND FALSE !(\read(tmp___2)) [L435] tmp___1 = __VERIFIER_nondet_int() [L437] COND FALSE !(\read(tmp___1)) [L446] CALL timeShift() [L166] COND FALSE !(\read(pumpRunning)) [L173] COND TRUE \read(systemActive) [L175] CALL processEnvironment() [L221] int tmp ; [L224] COND FALSE !(\read(pumpRunning)) [L239] CALL processEnvironment__wrappee__highWaterSensor() [L195] int tmp ; [L198] COND TRUE ! pumpRunning [L200] CALL, EXPR isHighWaterLevel() [L318] int retValue_acc ; [L319] int tmp ; [L320] int tmp___0 ; [L324] CALL, EXPR isHighWaterSensorDry() [L128] int retValue_acc ; [L131] COND FALSE !(waterLevel < 2) [L135] retValue_acc = 0 [L136] return (retValue_acc); [L324] RET, EXPR isHighWaterSensorDry() [L324] tmp = isHighWaterSensorDry() [L326] COND FALSE !(\read(tmp)) [L329] tmp___0 = 1 [L331] retValue_acc = tmp___0 [L332] return (retValue_acc); [L200] RET, EXPR isHighWaterLevel() [L200] tmp = isHighWaterLevel() [L202] COND TRUE \read(tmp) [L204] CALL activatePump() [L249] pumpRunning = 1 [L204] RET activatePump() [L239] RET processEnvironment__wrappee__highWaterSensor() [L175] RET processEnvironment() [L181] CALL __utac_acc__Specification1_spec__1() [L558] int tmp ; [L559] int tmp___0 ; [L563] CALL, EXPR isMethaneLevelCritical() [L87] int retValue_acc ; [L90] retValue_acc = methaneLevelCritical [L91] return (retValue_acc); [L563] RET, EXPR isMethaneLevelCritical() [L563] tmp = isMethaneLevelCritical() [L565] COND TRUE \read(tmp) [L567] CALL, EXPR isPumpRunning() [L273] int retValue_acc ; [L276] retValue_acc = pumpRunning [L277] return (retValue_acc); [L567] RET, EXPR isPumpRunning() [L567] tmp___0 = isPumpRunning() [L569] COND TRUE \read(tmp___0) [L571] CALL __automaton_fail() [L383] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 42 procedures, 245 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 29.3s, OverallIterations: 9, TraceHistogramMax: 1, AutomataDifference: 24.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1018 SDtfs, 1814 SDslu, 1099 SDs, 0 SdLazy, 5422 SolverSat, 1167 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 13.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 268 GetRequests, 178 SyntacticMatches, 4 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 8.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1619occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 1254 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 3.1s InterpolantComputationTime, 603 NumberOfCodeBlocks, 603 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 507 ConstructedInterpolants, 0 QuantifiedInterpolants, 150948 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 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...