/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 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/product-lines/minepump_spec1_product56.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 16:03:06,134 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 16:03:06,136 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 16:03:06,164 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 16:03:06,164 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 16:03:06,165 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 16:03:06,166 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 16:03:06,169 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 16:03:06,170 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 16:03:06,171 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 16:03:06,172 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 16:03:06,173 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 16:03:06,174 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 16:03:06,175 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 16:03:06,176 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 16:03:06,177 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 16:03:06,178 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 16:03:06,179 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 16:03:06,180 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 16:03:06,183 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 16:03:06,184 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 16:03:06,185 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 16:03:06,187 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 16:03:06,188 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 16:03:06,191 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 16:03:06,191 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 16:03:06,191 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 16:03:06,192 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 16:03:06,193 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 16:03:06,194 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 16:03:06,194 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 16:03:06,195 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 16:03:06,196 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 16:03:06,197 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 16:03:06,198 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 16:03:06,198 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 16:03:06,199 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 16:03:06,199 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 16:03:06,200 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 16:03:06,204 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 16:03:06,205 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 16:03:06,205 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 [2020-08-18 16:03:06,230 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 16:03:06,230 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 16:03:06,231 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 16:03:06,231 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 16:03:06,232 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 16:03:06,232 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 16:03:06,232 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 16:03:06,232 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 16:03:06,232 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 16:03:06,233 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 16:03:06,233 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 16:03:06,233 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 16:03:06,233 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 16:03:06,233 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 16:03:06,234 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 16:03:06,234 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 16:03:06,234 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 16:03:06,234 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 16:03:06,234 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 16:03:06,235 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 16:03:06,235 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 16:03:06,235 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 16:03:06,235 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 16:03:06,235 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 16:03:06,236 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 16:03:06,236 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 16:03:06,236 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 16:03:06,236 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 16:03:06,236 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 16:03:06,237 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 [2020-08-18 16:03:06,521 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 16:03:06,532 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 16:03:06,536 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 16:03:06,537 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 16:03:06,538 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 16:03:06,538 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec1_product56.cil.c [2020-08-18 16:03:06,596 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d3689d2d6/c6b486a75b064a0691cd7d96f5f7f663/FLAG37c25025c [2020-08-18 16:03:07,099 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 16:03:07,100 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/product-lines/minepump_spec1_product56.cil.c [2020-08-18 16:03:07,118 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d3689d2d6/c6b486a75b064a0691cd7d96f5f7f663/FLAG37c25025c [2020-08-18 16:03:07,454 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d3689d2d6/c6b486a75b064a0691cd7d96f5f7f663 [2020-08-18 16:03:07,466 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 16:03:07,467 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 16:03:07,468 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 16:03:07,469 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 16:03:07,472 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 16:03:07,473 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 04:03:07" (1/1) ... [2020-08-18 16:03:07,476 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64d2a1ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:03:07, skipping insertion in model container [2020-08-18 16:03:07,476 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 04:03:07" (1/1) ... [2020-08-18 16:03:07,484 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 16:03:07,535 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 16:03:07,959 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 16:03:07,972 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 16:03:08,111 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 16:03:08,160 INFO L208 MainTranslator]: Completed translation [2020-08-18 16:03:08,162 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:03:08 WrapperNode [2020-08-18 16:03:08,162 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 16:03:08,163 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 16:03:08,163 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 16:03:08,163 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 16:03:08,178 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:03:08" (1/1) ... [2020-08-18 16:03:08,180 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:03:08" (1/1) ... [2020-08-18 16:03:08,219 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:03:08" (1/1) ... [2020-08-18 16:03:08,220 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:03:08" (1/1) ... [2020-08-18 16:03:08,281 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:03:08" (1/1) ... [2020-08-18 16:03:08,291 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:03:08" (1/1) ... [2020-08-18 16:03:08,295 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:03:08" (1/1) ... [2020-08-18 16:03:08,303 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 16:03:08,304 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 16:03:08,304 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 16:03:08,304 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 16:03:08,305 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:03:08" (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 [2020-08-18 16:03:08,382 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 16:03:08,382 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 16:03:08,382 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2020-08-18 16:03:08,382 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2020-08-18 16:03:08,382 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2020-08-18 16:03:08,383 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2020-08-18 16:03:08,383 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2020-08-18 16:03:08,384 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2020-08-18 16:03:08,384 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2020-08-18 16:03:08,384 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2020-08-18 16:03:08,384 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2020-08-18 16:03:08,385 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2020-08-18 16:03:08,385 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2020-08-18 16:03:08,385 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__lowWaterSensor [2020-08-18 16:03:08,385 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2020-08-18 16:03:08,386 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2020-08-18 16:03:08,387 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2020-08-18 16:03:08,387 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2020-08-18 16:03:08,387 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2020-08-18 16:03:08,387 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2020-08-18 16:03:08,387 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2020-08-18 16:03:08,388 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterLevel [2020-08-18 16:03:08,388 INFO L138 BoogieDeclarations]: Found implementation of procedure stopSystem [2020-08-18 16:03:08,388 INFO L138 BoogieDeclarations]: Found implementation of procedure startSystem [2020-08-18 16:03:08,389 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2020-08-18 16:03:08,389 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2020-08-18 16:03:08,389 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2020-08-18 16:03:08,390 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2020-08-18 16:03:08,390 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__1 [2020-08-18 16:03:08,390 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2020-08-18 16:03:08,390 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2020-08-18 16:03:08,391 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2020-08-18 16:03:08,391 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2020-08-18 16:03:08,391 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2020-08-18 16:03:08,391 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 16:03:08,392 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2020-08-18 16:03:08,392 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2020-08-18 16:03:08,392 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2020-08-18 16:03:08,392 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2020-08-18 16:03:08,392 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2020-08-18 16:03:08,392 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2020-08-18 16:03:08,392 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2020-08-18 16:03:08,393 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterSensorDry [2020-08-18 16:03:08,393 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 16:03:08,393 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 16:03:08,393 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-08-18 16:03:08,395 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-08-18 16:03:08,396 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-18 16:03:08,397 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-18 16:03:08,397 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2020-08-18 16:03:08,397 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-18 16:03:08,397 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-18 16:03:08,397 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 16:03:08,397 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-18 16:03:08,397 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2020-08-18 16:03:08,398 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 16:03:08,398 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2020-08-18 16:03:08,398 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2020-08-18 16:03:08,398 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 16:03:08,399 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2020-08-18 16:03:08,399 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2020-08-18 16:03:08,399 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 16:03:08,399 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2020-08-18 16:03:08,400 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2020-08-18 16:03:08,400 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2020-08-18 16:03:08,400 INFO L130 BoogieDeclarations]: Found specification of procedure startSystem [2020-08-18 16:03:08,400 INFO L130 BoogieDeclarations]: Found specification of procedure stopSystem [2020-08-18 16:03:08,401 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2020-08-18 16:03:08,401 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2020-08-18 16:03:08,401 INFO L130 BoogieDeclarations]: Found specification of procedure test [2020-08-18 16:03:08,401 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2020-08-18 16:03:08,401 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2020-08-18 16:03:08,402 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2020-08-18 16:03:08,403 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2020-08-18 16:03:08,403 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterSensorDry [2020-08-18 16:03:08,403 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2020-08-18 16:03:08,404 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2020-08-18 16:03:08,404 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2020-08-18 16:03:08,404 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2020-08-18 16:03:08,405 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__1 [2020-08-18 16:03:08,405 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2020-08-18 16:03:08,405 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2020-08-18 16:03:08,406 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2020-08-18 16:03:08,406 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2020-08-18 16:03:08,406 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterLevel [2020-08-18 16:03:08,406 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__lowWaterSensor [2020-08-18 16:03:08,406 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2020-08-18 16:03:08,407 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2020-08-18 16:03:08,408 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2020-08-18 16:03:08,408 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2020-08-18 16:03:08,408 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2020-08-18 16:03:08,408 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2020-08-18 16:03:08,408 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2020-08-18 16:03:08,409 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2020-08-18 16:03:08,409 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2020-08-18 16:03:08,409 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 16:03:08,409 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2020-08-18 16:03:08,409 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 16:03:08,410 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-18 16:03:08,410 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 16:03:09,593 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 16:03:09,594 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-08-18 16:03:09,604 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 04:03:09 BoogieIcfgContainer [2020-08-18 16:03:09,604 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 16:03:09,607 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 16:03:09,607 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 16:03:09,611 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 16:03:09,611 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 04:03:07" (1/3) ... [2020-08-18 16:03:09,612 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5889fa59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 04:03:09, skipping insertion in model container [2020-08-18 16:03:09,613 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:03:08" (2/3) ... [2020-08-18 16:03:09,613 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5889fa59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 04:03:09, skipping insertion in model container [2020-08-18 16:03:09,614 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 04:03:09" (3/3) ... [2020-08-18 16:03:09,615 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec1_product56.cil.c [2020-08-18 16:03:09,626 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 16:03:09,637 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 16:03:09,652 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 16:03:09,680 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 16:03:09,680 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 16:03:09,680 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 16:03:09,680 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 16:03:09,681 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 16:03:09,681 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 16:03:09,681 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 16:03:09,681 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 16:03:09,702 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states. [2020-08-18 16:03:09,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-18 16:03:09,713 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:03:09,715 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] [2020-08-18 16:03:09,715 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:03:09,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:03:09,721 INFO L82 PathProgramCache]: Analyzing trace with hash 733672736, now seen corresponding path program 1 times [2020-08-18 16:03:09,729 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:03:09,729 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1457820929] [2020-08-18 16:03:09,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:03:09,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:10,413 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 16:03:10,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:03:10,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:10,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 16:03:10,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:10,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 16:03:10,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:10,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 16:03:10,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:10,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 16:03:10,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:10,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-18 16:03:10,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:10,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-18 16:03:10,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:10,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:03:10,508 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1457820929] [2020-08-18 16:03:10,510 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:03:10,510 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 16:03:10,511 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944540442] [2020-08-18 16:03:10,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 16:03:10,519 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:03:10,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 16:03:10,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:03:10,537 INFO L87 Difference]: Start difference. First operand 196 states. Second operand 3 states. [2020-08-18 16:03:11,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:03:11,932 INFO L93 Difference]: Finished difference Result 352 states and 460 transitions. [2020-08-18 16:03:11,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 16:03:11,935 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 46 [2020-08-18 16:03:11,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:03:11,950 INFO L225 Difference]: With dead ends: 352 [2020-08-18 16:03:11,951 INFO L226 Difference]: Without dead ends: 190 [2020-08-18 16:03:11,957 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:03:11,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-08-18 16:03:12,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 153. [2020-08-18 16:03:12,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-08-18 16:03:12,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 182 transitions. [2020-08-18 16:03:12,103 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 182 transitions. Word has length 46 [2020-08-18 16:03:12,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:03:12,104 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 182 transitions. [2020-08-18 16:03:12,104 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 16:03:12,104 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 182 transitions. [2020-08-18 16:03:12,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-08-18 16:03:12,115 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:03:12,115 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] [2020-08-18 16:03:12,115 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 16:03:12,115 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:03:12,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:03:12,116 INFO L82 PathProgramCache]: Analyzing trace with hash 1141201306, now seen corresponding path program 1 times [2020-08-18 16:03:12,116 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:03:12,116 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1731417979] [2020-08-18 16:03:12,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:03:12,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:12,483 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 16:03:12,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:03:12,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:12,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 16:03:12,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:12,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 16:03:12,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:12,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 16:03:12,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:12,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 16:03:12,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:12,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-18 16:03:12,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:12,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-18 16:03:12,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:12,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:03:12,531 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1731417979] [2020-08-18 16:03:12,531 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:03:12,531 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 16:03:12,531 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591885315] [2020-08-18 16:03:12,533 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 16:03:12,533 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:03:12,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 16:03:12,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 16:03:12,534 INFO L87 Difference]: Start difference. First operand 153 states and 182 transitions. Second operand 4 states. [2020-08-18 16:03:12,974 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 16:03:14,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:03:14,004 INFO L93 Difference]: Finished difference Result 275 states and 339 transitions. [2020-08-18 16:03:14,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 16:03:14,004 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2020-08-18 16:03:14,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:03:14,009 INFO L225 Difference]: With dead ends: 275 [2020-08-18 16:03:14,009 INFO L226 Difference]: Without dead ends: 174 [2020-08-18 16:03:14,011 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 [2020-08-18 16:03:14,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-08-18 16:03:14,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 144. [2020-08-18 16:03:14,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-08-18 16:03:14,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 170 transitions. [2020-08-18 16:03:14,057 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 170 transitions. Word has length 47 [2020-08-18 16:03:14,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:03:14,058 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 170 transitions. [2020-08-18 16:03:14,058 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 16:03:14,058 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 170 transitions. [2020-08-18 16:03:14,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-18 16:03:14,060 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:03:14,060 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:03:14,060 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 16:03:14,060 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:03:14,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:03:14,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1705860394, now seen corresponding path program 1 times [2020-08-18 16:03:14,061 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:03:14,061 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [509840953] [2020-08-18 16:03:14,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:03:14,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:14,373 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 16:03:14,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:03:14,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:14,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 16:03:14,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:14,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 16:03:14,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:14,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 16:03:14,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:14,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 16:03:14,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:14,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-18 16:03:14,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:14,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-18 16:03:14,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:14,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:03:14,490 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [509840953] [2020-08-18 16:03:14,490 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:03:14,490 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 16:03:14,491 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684388507] [2020-08-18 16:03:14,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 16:03:14,496 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:03:14,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 16:03:14,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-18 16:03:14,497 INFO L87 Difference]: Start difference. First operand 144 states and 170 transitions. Second operand 8 states. [2020-08-18 16:03:14,879 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 16:03:15,157 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 16:03:15,392 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 16:03:15,630 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 16:03:16,312 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 16:03:18,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:03:18,498 INFO L93 Difference]: Finished difference Result 491 states and 613 transitions. [2020-08-18 16:03:18,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 16:03:18,510 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 52 [2020-08-18 16:03:18,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:03:18,516 INFO L225 Difference]: With dead ends: 491 [2020-08-18 16:03:18,516 INFO L226 Difference]: Without dead ends: 371 [2020-08-18 16:03:18,518 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-08-18 16:03:18,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2020-08-18 16:03:18,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 302. [2020-08-18 16:03:18,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 302 states. [2020-08-18 16:03:18,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 368 transitions. [2020-08-18 16:03:18,597 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 368 transitions. Word has length 52 [2020-08-18 16:03:18,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:03:18,598 INFO L479 AbstractCegarLoop]: Abstraction has 302 states and 368 transitions. [2020-08-18 16:03:18,598 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 16:03:18,598 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 368 transitions. [2020-08-18 16:03:18,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-18 16:03:18,600 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:03:18,600 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] [2020-08-18 16:03:18,600 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 16:03:18,601 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:03:18,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:03:18,601 INFO L82 PathProgramCache]: Analyzing trace with hash -986744431, now seen corresponding path program 1 times [2020-08-18 16:03:18,601 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:03:18,602 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1233272702] [2020-08-18 16:03:18,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:03:18,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:18,886 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 16:03:18,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:03:18,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:18,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 16:03:18,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:18,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 16:03:18,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:18,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 16:03:18,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:18,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 16:03:18,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:18,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-18 16:03:18,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:18,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-18 16:03:18,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:18,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-18 16:03:18,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:18,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:03:18,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1233272702] [2020-08-18 16:03:18,969 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:03:18,969 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 16:03:18,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206399471] [2020-08-18 16:03:18,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 16:03:18,970 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:03:18,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 16:03:18,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-18 16:03:18,971 INFO L87 Difference]: Start difference. First operand 302 states and 368 transitions. Second operand 8 states. [2020-08-18 16:03:19,411 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 16:03:20,370 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 16:03:20,816 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 16:03:21,065 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 16:03:21,302 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 16:03:21,935 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 16:03:23,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:03:23,081 INFO L93 Difference]: Finished difference Result 975 states and 1267 transitions. [2020-08-18 16:03:23,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 16:03:23,081 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 57 [2020-08-18 16:03:23,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:03:23,091 INFO L225 Difference]: With dead ends: 975 [2020-08-18 16:03:23,091 INFO L226 Difference]: Without dead ends: 697 [2020-08-18 16:03:23,094 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2020-08-18 16:03:23,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 697 states. [2020-08-18 16:03:23,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 697 to 559. [2020-08-18 16:03:23,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 559 states. [2020-08-18 16:03:23,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 686 transitions. [2020-08-18 16:03:23,237 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 686 transitions. Word has length 57 [2020-08-18 16:03:23,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:03:23,238 INFO L479 AbstractCegarLoop]: Abstraction has 559 states and 686 transitions. [2020-08-18 16:03:23,238 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 16:03:23,238 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 686 transitions. [2020-08-18 16:03:23,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-18 16:03:23,241 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:03:23,241 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] [2020-08-18 16:03:23,241 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 16:03:23,242 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:03:23,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:03:23,242 INFO L82 PathProgramCache]: Analyzing trace with hash -1925248939, now seen corresponding path program 1 times [2020-08-18 16:03:23,242 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:03:23,243 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1833120574] [2020-08-18 16:03:23,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:03:23,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:23,512 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 16:03:23,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:03:23,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:23,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 16:03:23,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:23,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 16:03:23,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:23,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 16:03:23,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:23,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 16:03:23,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:23,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 16:03:23,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:23,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 16:03:23,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:23,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-18 16:03:23,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:23,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-18 16:03:23,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:23,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:03:23,594 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1833120574] [2020-08-18 16:03:23,594 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:03:23,594 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-18 16:03:23,595 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503027856] [2020-08-18 16:03:23,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 16:03:23,595 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:03:23,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 16:03:23,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-18 16:03:23,596 INFO L87 Difference]: Start difference. First operand 559 states and 686 transitions. Second operand 9 states. [2020-08-18 16:03:23,972 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 16:03:24,932 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 16:03:25,222 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 16:03:25,511 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 16:03:26,189 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 16:03:26,489 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 16:03:27,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:03:27,680 INFO L93 Difference]: Finished difference Result 1553 states and 2084 transitions. [2020-08-18 16:03:27,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-18 16:03:27,681 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 61 [2020-08-18 16:03:27,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:03:27,690 INFO L225 Difference]: With dead ends: 1553 [2020-08-18 16:03:27,690 INFO L226 Difference]: Without dead ends: 1018 [2020-08-18 16:03:27,693 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 [2020-08-18 16:03:27,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1018 states. [2020-08-18 16:03:27,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1018 to 831. [2020-08-18 16:03:27,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 831 states. [2020-08-18 16:03:27,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 1023 transitions. [2020-08-18 16:03:27,863 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 1023 transitions. Word has length 61 [2020-08-18 16:03:27,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:03:27,863 INFO L479 AbstractCegarLoop]: Abstraction has 831 states and 1023 transitions. [2020-08-18 16:03:27,863 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 16:03:27,863 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 1023 transitions. [2020-08-18 16:03:27,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-08-18 16:03:27,866 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:03:27,866 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:03:27,867 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 16:03:27,867 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:03:27,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:03:27,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1051920088, now seen corresponding path program 1 times [2020-08-18 16:03:27,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:03:27,868 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [791357892] [2020-08-18 16:03:27,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:03:27,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:28,096 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 16:03:28,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:03:28,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:28,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 16:03:28,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:28,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 16:03:28,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:28,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 16:03:28,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:28,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 16:03:28,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:28,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 16:03:28,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:28,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-18 16:03:28,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:28,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:03:28,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:28,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:03:28,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:28,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:03:28,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:28,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 16:03:28,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:28,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 16:03:28,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:28,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-18 16:03:28,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:28,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-18 16:03:28,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:28,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:03:28,250 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [791357892] [2020-08-18 16:03:28,252 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:03:28,252 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-18 16:03:28,253 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873994035] [2020-08-18 16:03:28,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 16:03:28,254 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:03:28,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 16:03:28,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-18 16:03:28,255 INFO L87 Difference]: Start difference. First operand 831 states and 1023 transitions. Second operand 9 states. [2020-08-18 16:03:29,292 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 16:03:29,549 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-18 16:03:29,796 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 16:03:30,060 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 16:03:31,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:03:31,315 INFO L93 Difference]: Finished difference Result 1901 states and 2517 transitions. [2020-08-18 16:03:31,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 16:03:31,316 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 89 [2020-08-18 16:03:31,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:03:31,325 INFO L225 Difference]: With dead ends: 1901 [2020-08-18 16:03:31,325 INFO L226 Difference]: Without dead ends: 1094 [2020-08-18 16:03:31,329 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2020-08-18 16:03:31,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1094 states. [2020-08-18 16:03:31,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1094 to 857. [2020-08-18 16:03:31,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 857 states. [2020-08-18 16:03:31,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 1051 transitions. [2020-08-18 16:03:31,531 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 1051 transitions. Word has length 89 [2020-08-18 16:03:31,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:03:31,533 INFO L479 AbstractCegarLoop]: Abstraction has 857 states and 1051 transitions. [2020-08-18 16:03:31,533 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 16:03:31,533 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 1051 transitions. [2020-08-18 16:03:31,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-08-18 16:03:31,538 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:03:31,538 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:03:31,540 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 16:03:31,540 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:03:31,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:03:31,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1326679702, now seen corresponding path program 1 times [2020-08-18 16:03:31,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:03:31,542 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1417106828] [2020-08-18 16:03:31,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:03:31,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:31,795 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 16:03:31,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:03:31,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:31,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 16:03:31,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:31,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 16:03:31,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:31,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 16:03:31,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:31,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 16:03:31,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:31,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 16:03:31,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:31,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-18 16:03:31,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:31,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:03:31,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:31,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:03:31,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:31,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:03:31,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:31,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 16:03:31,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:31,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 16:03:31,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:31,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-18 16:03:31,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:31,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-18 16:03:31,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:31,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:03:31,958 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1417106828] [2020-08-18 16:03:31,963 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:03:31,966 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-18 16:03:31,966 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824570625] [2020-08-18 16:03:31,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 16:03:31,967 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:03:31,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 16:03:31,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-08-18 16:03:31,968 INFO L87 Difference]: Start difference. First operand 857 states and 1051 transitions. Second operand 11 states. [2020-08-18 16:03:32,521 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 16:03:32,797 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 16:03:33,020 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 16:03:33,780 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 16:03:34,041 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 16:03:34,299 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 16:03:35,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:03:35,513 INFO L93 Difference]: Finished difference Result 1955 states and 2636 transitions. [2020-08-18 16:03:35,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 16:03:35,513 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 89 [2020-08-18 16:03:35,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:03:35,521 INFO L225 Difference]: With dead ends: 1955 [2020-08-18 16:03:35,521 INFO L226 Difference]: Without dead ends: 1122 [2020-08-18 16:03:35,526 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2020-08-18 16:03:35,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1122 states. [2020-08-18 16:03:35,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1122 to 873. [2020-08-18 16:03:35,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 873 states. [2020-08-18 16:03:35,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873 states to 873 states and 1067 transitions. [2020-08-18 16:03:35,709 INFO L78 Accepts]: Start accepts. Automaton has 873 states and 1067 transitions. Word has length 89 [2020-08-18 16:03:35,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:03:35,709 INFO L479 AbstractCegarLoop]: Abstraction has 873 states and 1067 transitions. [2020-08-18 16:03:35,710 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 16:03:35,710 INFO L276 IsEmpty]: Start isEmpty. Operand 873 states and 1067 transitions. [2020-08-18 16:03:35,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-08-18 16:03:35,712 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:03:35,712 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:03:35,712 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 16:03:35,713 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:03:35,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:03:35,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1017987339, now seen corresponding path program 1 times [2020-08-18 16:03:35,713 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:03:35,714 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1613421017] [2020-08-18 16:03:35,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:03:35,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:35,999 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 16:03:36,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:03:36,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:36,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 16:03:36,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:36,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 16:03:36,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:36,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 16:03:36,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:36,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 16:03:36,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:36,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 16:03:36,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:36,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-18 16:03:36,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:36,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:03:36,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:36,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:03:36,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:36,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:03:36,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:36,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 16:03:36,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:36,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 16:03:36,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:36,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-18 16:03:36,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:36,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-18 16:03:36,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:36,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:03:36,147 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1613421017] [2020-08-18 16:03:36,147 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:03:36,147 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-18 16:03:36,147 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572077925] [2020-08-18 16:03:36,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 16:03:36,148 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:03:36,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 16:03:36,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-18 16:03:36,149 INFO L87 Difference]: Start difference. First operand 873 states and 1067 transitions. Second operand 7 states. [2020-08-18 16:03:36,481 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 16:03:37,001 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 16:03:39,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:03:39,699 INFO L93 Difference]: Finished difference Result 2923 states and 3961 transitions. [2020-08-18 16:03:39,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-18 16:03:39,702 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 89 [2020-08-18 16:03:39,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:03:39,716 INFO L225 Difference]: With dead ends: 2923 [2020-08-18 16:03:39,717 INFO L226 Difference]: Without dead ends: 2074 [2020-08-18 16:03:39,721 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-08-18 16:03:39,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2074 states. [2020-08-18 16:03:40,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2074 to 1751. [2020-08-18 16:03:40,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1751 states. [2020-08-18 16:03:40,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1751 states to 1751 states and 2157 transitions. [2020-08-18 16:03:40,116 INFO L78 Accepts]: Start accepts. Automaton has 1751 states and 2157 transitions. Word has length 89 [2020-08-18 16:03:40,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:03:40,117 INFO L479 AbstractCegarLoop]: Abstraction has 1751 states and 2157 transitions. [2020-08-18 16:03:40,117 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 16:03:40,117 INFO L276 IsEmpty]: Start isEmpty. Operand 1751 states and 2157 transitions. [2020-08-18 16:03:40,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-08-18 16:03:40,120 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:03:40,120 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:03:40,120 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 16:03:40,120 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:03:40,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:03:40,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1174397627, now seen corresponding path program 1 times [2020-08-18 16:03:40,121 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:03:40,121 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [392139407] [2020-08-18 16:03:40,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:03:40,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 16:03:40,205 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 16:03:40,205 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 16:03:40,210 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 16:03:40,248 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 04:03:40 BoogieIcfgContainer [2020-08-18 16:03:40,249 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 16:03:40,251 INFO L168 Benchmark]: Toolchain (without parser) took 32783.45 ms. Allocated memory was 148.4 MB in the beginning and 674.2 MB in the end (delta: 525.9 MB). Free memory was 103.1 MB in the beginning and 130.0 MB in the end (delta: -26.9 MB). Peak memory consumption was 499.0 MB. Max. memory is 7.1 GB. [2020-08-18 16:03:40,251 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 148.4 MB. Free memory was 122.9 MB in the beginning and 122.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 16:03:40,255 INFO L168 Benchmark]: CACSL2BoogieTranslator took 693.88 ms. Allocated memory was 148.4 MB in the beginning and 205.0 MB in the end (delta: 56.6 MB). Free memory was 102.9 MB in the beginning and 170.4 MB in the end (delta: -67.5 MB). Peak memory consumption was 23.7 MB. Max. memory is 7.1 GB. [2020-08-18 16:03:40,259 INFO L168 Benchmark]: Boogie Preprocessor took 140.70 ms. Allocated memory is still 205.0 MB. Free memory was 170.4 MB in the beginning and 165.8 MB in the end (delta: 4.6 MB). Peak memory consumption was 4.6 MB. Max. memory is 7.1 GB. [2020-08-18 16:03:40,264 INFO L168 Benchmark]: RCFGBuilder took 1300.55 ms. Allocated memory was 205.0 MB in the beginning and 235.9 MB in the end (delta: 30.9 MB). Free memory was 165.8 MB in the beginning and 187.0 MB in the end (delta: -21.2 MB). Peak memory consumption was 78.6 MB. Max. memory is 7.1 GB. [2020-08-18 16:03:40,265 INFO L168 Benchmark]: TraceAbstraction took 30641.66 ms. Allocated memory was 235.9 MB in the beginning and 674.2 MB in the end (delta: 438.3 MB). Free memory was 187.0 MB in the beginning and 130.0 MB in the end (delta: 57.0 MB). Peak memory consumption was 495.3 MB. Max. memory is 7.1 GB. [2020-08-18 16:03:40,273 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 148.4 MB. Free memory was 122.9 MB in the beginning and 122.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 693.88 ms. Allocated memory was 148.4 MB in the beginning and 205.0 MB in the end (delta: 56.6 MB). Free memory was 102.9 MB in the beginning and 170.4 MB in the end (delta: -67.5 MB). Peak memory consumption was 23.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 140.70 ms. Allocated memory is still 205.0 MB. Free memory was 170.4 MB in the beginning and 165.8 MB in the end (delta: 4.6 MB). Peak memory consumption was 4.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1300.55 ms. Allocated memory was 205.0 MB in the beginning and 235.9 MB in the end (delta: 30.9 MB). Free memory was 165.8 MB in the beginning and 187.0 MB in the end (delta: -21.2 MB). Peak memory consumption was 78.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 30641.66 ms. Allocated memory was 235.9 MB in the beginning and 674.2 MB in the end (delta: 438.3 MB). Free memory was 187.0 MB in the beginning and 130.0 MB in the end (delta: 57.0 MB). Peak memory consumption was 495.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 806]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L209] static struct __ACC__ERR *head = (struct __ACC__ERR *)0; [L490] int pumpRunning = 0; [L491] int systemActive = 1; [L811] int cleanupTimeShifts = 4; [L908] int waterLevel = 1; [L909] int methaneLevelCritical = 0; [L884] int retValue_acc ; [L885] int tmp ; [L889] FCALL select_helpers() [L890] FCALL select_features() [L891] CALL, EXPR valid_product() [L766] int retValue_acc ; [L769] retValue_acc = 1 [L770] return (retValue_acc); [L891] RET, EXPR valid_product() [L891] tmp = valid_product() [L893] COND TRUE \read(tmp) [L895] FCALL setup() [L896] CALL runTest() [L878] CALL test() [L413] int splverifierCounter ; [L414] int tmp ; [L415] int tmp___0 ; [L416] int tmp___1 ; [L417] int tmp___2 ; [L420] splverifierCounter = 0 [L422] COND TRUE 1 [L424] COND TRUE splverifierCounter < 4 [L430] tmp = __VERIFIER_nondet_int() [L432] COND TRUE \read(tmp) [L434] CALL waterRise() [L926] COND TRUE waterLevel < 2 [L927] waterLevel = waterLevel + 1 [L434] RET waterRise() [L440] tmp___0 = __VERIFIER_nondet_int() [L442] COND TRUE \read(tmp___0) [L444] CALL changeMethaneLevel() [L938] COND FALSE !(\read(methaneLevelCritical)) [L941] methaneLevelCritical = 1 [L444] RET changeMethaneLevel() [L450] tmp___2 = __VERIFIER_nondet_int() [L452] COND FALSE !(\read(tmp___2)) [L458] tmp___1 = __VERIFIER_nondet_int() [L460] COND FALSE !(\read(tmp___1)) [L469] CALL timeShift() [L498] COND FALSE !(\read(pumpRunning)) [L505] COND TRUE \read(systemActive) [L507] CALL processEnvironment() [L579] int tmp ; [L582] COND FALSE !(\read(pumpRunning)) [L597] CALL processEnvironment__wrappee__lowWaterSensor() [L553] int tmp ; [L556] COND FALSE !(\read(pumpRunning)) [L571] CALL processEnvironment__wrappee__highWaterSensor() [L527] int tmp ; [L530] COND TRUE ! pumpRunning [L532] CALL, EXPR isHighWaterLevel() [L676] int retValue_acc ; [L677] int tmp ; [L678] int tmp___0 ; [L682] CALL, EXPR isHighWaterSensorDry() [L988] int retValue_acc ; [L991] COND FALSE !(waterLevel < 2) [L995] retValue_acc = 0 [L996] return (retValue_acc); [L682] RET, EXPR isHighWaterSensorDry() [L682] tmp = isHighWaterSensorDry() [L684] COND FALSE !(\read(tmp)) [L687] tmp___0 = 1 [L689] retValue_acc = tmp___0 [L690] return (retValue_acc); [L532] RET, EXPR isHighWaterLevel() [L532] tmp = isHighWaterLevel() [L534] COND TRUE \read(tmp) [L536] CALL activatePump() [L607] pumpRunning = 1 [L536] RET activatePump() [L571] RET processEnvironment__wrappee__highWaterSensor() [L597] RET processEnvironment__wrappee__lowWaterSensor() [L507] RET processEnvironment() [L513] CALL __utac_acc__Specification1_spec__1() [L777] int tmp ; [L778] int tmp___0 ; [L782] CALL, EXPR isMethaneLevelCritical() [L947] int retValue_acc ; [L950] retValue_acc = methaneLevelCritical [L951] return (retValue_acc); [L782] RET, EXPR isMethaneLevelCritical() [L782] tmp = isMethaneLevelCritical() [L784] COND TRUE \read(tmp) [L786] CALL, EXPR isPumpRunning() [L631] int retValue_acc ; [L634] retValue_acc = pumpRunning [L635] return (retValue_acc); [L786] RET, EXPR isPumpRunning() [L786] tmp___0 = isPumpRunning() [L788] COND TRUE \read(tmp___0) [L790] CALL __automaton_fail() [L806] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 43 procedures, 255 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 30.5s, OverallIterations: 9, TraceHistogramMax: 1, AutomataDifference: 25.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1128 SDtfs, 2314 SDslu, 1156 SDs, 0 SdLazy, 5898 SolverSat, 1571 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 14.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 277 GetRequests, 186 SyntacticMatches, 5 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 8.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1751occurred 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: 1.3s AutomataMinimizationTime, 8 MinimizatonAttempts, 1270 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 2.9s InterpolantComputationTime, 623 NumberOfCodeBlocks, 623 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 522 ConstructedInterpolants, 0 QuantifiedInterpolants, 159558 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...