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 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/product-lines/minepump_spec4_product57.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:38:52,025 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:38:52,028 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:38:52,046 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:38:52,047 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:38:52,049 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:38:52,051 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:38:52,064 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:38:52,066 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:38:52,067 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:38:52,067 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:38:52,069 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:38:52,069 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:38:52,073 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:38:52,075 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:38:52,077 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:38:52,078 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:38:52,081 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:38:52,083 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:38:52,089 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:38:52,094 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:38:52,095 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:38:52,099 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:38:52,100 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:38:52,104 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-14 23:38:52,104 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-14 23:38:52,104 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-14 23:38:52,106 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-14 23:38:52,108 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-14 23:38:52,109 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-14 23:38:52,109 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:38:52,111 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:38:52,112 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:38:52,113 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:38:52,115 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:38:52,115 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:38:52,115 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:38:52,116 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:38:52,116 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:38:52,118 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:38:52,120 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:38:52,121 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 23:38:52,138 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:38:52,138 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:38:52,139 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:38:52,140 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:38:52,140 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:38:52,140 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:38:52,140 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:38:52,141 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:38:52,141 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:38:52,141 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:38:52,141 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:38:52,142 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:38:52,142 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:38:52,142 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:38:52,142 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:38:52,142 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:38:52,143 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:38:52,143 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:38:52,143 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:38:52,143 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:38:52,143 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:38:52,144 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:38:52,144 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:38:52,144 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:38:52,144 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:38:52,144 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:38:52,145 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:38:52,145 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:38:52,145 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 23:38:52,426 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:38:52,448 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:38:52,451 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:38:52,453 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:38:52,454 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:38:52,454 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec4_product57.cil.c [2019-10-14 23:38:52,537 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a9aef648d/febeb45a5d4c4045a44645651b9fafea/FLAG240a064c0 [2019-10-14 23:38:53,026 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:38:53,026 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/minepump_spec4_product57.cil.c [2019-10-14 23:38:53,041 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a9aef648d/febeb45a5d4c4045a44645651b9fafea/FLAG240a064c0 [2019-10-14 23:38:53,355 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a9aef648d/febeb45a5d4c4045a44645651b9fafea [2019-10-14 23:38:53,363 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:38:53,365 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:38:53,366 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:38:53,366 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:38:53,369 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:38:53,370 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:38:53" (1/1) ... [2019-10-14 23:38:53,373 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@626b4f80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:38:53, skipping insertion in model container [2019-10-14 23:38:53,373 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:38:53" (1/1) ... [2019-10-14 23:38:53,378 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:38:53,439 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:38:53,979 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:38:54,005 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:38:54,126 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:38:54,166 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:38:54,167 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:38:54 WrapperNode [2019-10-14 23:38:54,167 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:38:54,168 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:38:54,168 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:38:54,168 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:38:54,178 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:38:54" (1/1) ... [2019-10-14 23:38:54,179 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:38:54" (1/1) ... [2019-10-14 23:38:54,198 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:38:54" (1/1) ... [2019-10-14 23:38:54,198 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:38:54" (1/1) ... [2019-10-14 23:38:54,226 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:38:54" (1/1) ... [2019-10-14 23:38:54,236 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:38:54" (1/1) ... [2019-10-14 23:38:54,241 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:38:54" (1/1) ... [2019-10-14 23:38:54,249 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:38:54,249 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:38:54,250 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:38:54,250 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:38:54,251 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:38:54" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2019-10-14 23:38:54,307 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:38:54,308 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:38:54,308 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-10-14 23:38:54,308 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-10-14 23:38:54,308 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-10-14 23:38:54,314 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2019-10-14 23:38:54,314 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2019-10-14 23:38:54,314 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2019-10-14 23:38:54,314 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump__wrappee__lowWaterSensor [2019-10-14 23:38:54,315 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2019-10-14 23:38:54,315 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2019-10-14 23:38:54,315 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2019-10-14 23:38:54,315 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2019-10-14 23:38:54,315 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2019-10-14 23:38:54,316 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2019-10-14 23:38:54,316 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterLevel [2019-10-14 23:38:54,316 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification4_spec__1 [2019-10-14 23:38:54,316 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2019-10-14 23:38:54,316 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2019-10-14 23:38:54,317 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2019-10-14 23:38:54,317 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2019-10-14 23:38:54,317 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2019-10-14 23:38:54,317 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2019-10-14 23:38:54,317 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2019-10-14 23:38:54,318 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterSensorDry [2019-10-14 23:38:54,318 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-10-14 23:38:54,318 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-10-14 23:38:54,318 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-10-14 23:38:54,318 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-10-14 23:38:54,319 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-10-14 23:38:54,319 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-10-14 23:38:54,319 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-10-14 23:38:54,319 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-10-14 23:38:54,319 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:38:54,319 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-10-14 23:38:54,320 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-10-14 23:38:54,320 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-10-14 23:38:54,320 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-10-14 23:38:54,320 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-10-14 23:38:54,320 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-10-14 23:38:54,320 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-10-14 23:38:54,321 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:38:54,321 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:38:54,321 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-14 23:38:54,321 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2019-10-14 23:38:54,322 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2019-10-14 23:38:54,322 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-10-14 23:38:54,322 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-10-14 23:38:54,322 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-10-14 23:38:54,322 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2019-10-14 23:38:54,322 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2019-10-14 23:38:54,322 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2019-10-14 23:38:54,323 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2019-10-14 23:38:54,323 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterSensorDry [2019-10-14 23:38:54,323 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2019-10-14 23:38:54,323 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2019-10-14 23:38:54,323 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2019-10-14 23:38:54,323 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2019-10-14 23:38:54,323 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification4_spec__1 [2019-10-14 23:38:54,324 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2019-10-14 23:38:54,324 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2019-10-14 23:38:54,324 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2019-10-14 23:38:54,324 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2019-10-14 23:38:54,324 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterLevel [2019-10-14 23:38:54,324 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump__wrappee__lowWaterSensor [2019-10-14 23:38:54,325 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2019-10-14 23:38:54,325 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 23:38:54,325 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-10-14 23:38:54,325 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2019-10-14 23:38:54,325 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-10-14 23:38:54,325 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-10-14 23:38:54,326 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-10-14 23:38:54,326 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-10-14 23:38:54,326 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-10-14 23:38:54,326 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-10-14 23:38:54,326 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-10-14 23:38:54,326 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:38:54,327 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-14 23:38:54,327 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-14 23:38:54,327 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-14 23:38:54,327 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-10-14 23:38:54,327 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-14 23:38:54,327 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-14 23:38:54,328 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 23:38:54,328 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-14 23:38:54,328 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-10-14 23:38:54,328 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 23:38:54,328 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-10-14 23:38:54,328 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-10-14 23:38:54,329 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 23:38:54,329 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-10-14 23:38:54,329 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-10-14 23:38:54,329 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-10-14 23:38:54,329 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:38:54,329 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-14 23:38:54,329 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:38:55,457 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:38:55,458 INFO L284 CfgBuilder]: Removed 5 assume(true) statements. [2019-10-14 23:38:55,459 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:38:55 BoogieIcfgContainer [2019-10-14 23:38:55,459 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:38:55,461 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:38:55,461 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:38:55,465 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:38:55,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:38:53" (1/3) ... [2019-10-14 23:38:55,466 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d817dfe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:38:55, skipping insertion in model container [2019-10-14 23:38:55,466 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:38:54" (2/3) ... [2019-10-14 23:38:55,467 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d817dfe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:38:55, skipping insertion in model container [2019-10-14 23:38:55,467 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:38:55" (3/3) ... [2019-10-14 23:38:55,469 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec4_product57.cil.c [2019-10-14 23:38:55,479 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:38:55,488 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:38:55,500 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:38:55,527 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:38:55,528 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:38:55,528 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:38:55,528 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:38:55,528 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:38:55,528 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:38:55,529 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:38:55,529 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:38:55,557 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states. [2019-10-14 23:38:55,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-10-14 23:38:55,572 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:38:55,573 INFO L380 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] [2019-10-14 23:38:55,578 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:38:55,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:38:55,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1827061433, now seen corresponding path program 1 times [2019-10-14 23:38:55,595 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:38:55,595 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511418081] [2019-10-14 23:38:55,595 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:38:55,596 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:38:55,596 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:38:55,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:38:56,292 WARN L191 SmtUtils]: Spent 324.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2019-10-14 23:38:56,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:38:56,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:38:56,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:38:56,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:38:56,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:38:56,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:38:56,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:38:56,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:38:56,371 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511418081] [2019-10-14 23:38:56,373 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:38:56,374 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:38:56,375 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838225818] [2019-10-14 23:38:56,380 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:38:56,381 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:38:56,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:38:56,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:38:56,399 INFO L87 Difference]: Start difference. First operand 186 states. Second operand 3 states. [2019-10-14 23:38:57,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:38:57,604 INFO L93 Difference]: Finished difference Result 329 states and 422 transitions. [2019-10-14 23:38:57,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:38:57,606 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 46 [2019-10-14 23:38:57,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:38:57,628 INFO L225 Difference]: With dead ends: 329 [2019-10-14 23:38:57,628 INFO L226 Difference]: Without dead ends: 177 [2019-10-14 23:38:57,633 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:38:57,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2019-10-14 23:38:57,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 143. [2019-10-14 23:38:57,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2019-10-14 23:38:57,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 166 transitions. [2019-10-14 23:38:57,751 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 166 transitions. Word has length 46 [2019-10-14 23:38:57,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:38:57,752 INFO L462 AbstractCegarLoop]: Abstraction has 143 states and 166 transitions. [2019-10-14 23:38:57,753 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:38:57,753 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 166 transitions. [2019-10-14 23:38:57,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-10-14 23:38:57,764 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:38:57,766 INFO L380 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] [2019-10-14 23:38:57,766 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:38:57,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:38:57,768 INFO L82 PathProgramCache]: Analyzing trace with hash 632131827, now seen corresponding path program 1 times [2019-10-14 23:38:57,768 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:38:57,769 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811477494] [2019-10-14 23:38:57,769 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:38:57,769 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:38:57,769 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:38:57,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:38:58,194 WARN L191 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2019-10-14 23:38:58,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:38:58,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:38:58,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:38:58,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:38:58,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:38:58,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:38:58,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:38:58,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:38:58,229 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811477494] [2019-10-14 23:38:58,230 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:38:58,230 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 23:38:58,230 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497958392] [2019-10-14 23:38:58,232 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:38:58,232 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:38:58,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:38:58,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:38:58,233 INFO L87 Difference]: Start difference. First operand 143 states and 166 transitions. Second operand 4 states. [2019-10-14 23:38:58,697 WARN L191 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2019-10-14 23:38:59,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:38:59,616 INFO L93 Difference]: Finished difference Result 262 states and 313 transitions. [2019-10-14 23:38:59,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 23:38:59,616 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2019-10-14 23:38:59,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:38:59,619 INFO L225 Difference]: With dead ends: 262 [2019-10-14 23:38:59,619 INFO L226 Difference]: Without dead ends: 161 [2019-10-14 23:38:59,621 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:38:59,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2019-10-14 23:38:59,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 134. [2019-10-14 23:38:59,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-10-14 23:38:59,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 154 transitions. [2019-10-14 23:38:59,661 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 154 transitions. Word has length 47 [2019-10-14 23:38:59,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:38:59,661 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 154 transitions. [2019-10-14 23:38:59,662 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:38:59,662 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 154 transitions. [2019-10-14 23:38:59,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-10-14 23:38:59,664 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:38:59,664 INFO L380 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] [2019-10-14 23:38:59,664 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:38:59,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:38:59,664 INFO L82 PathProgramCache]: Analyzing trace with hash 880596518, now seen corresponding path program 1 times [2019-10-14 23:38:59,665 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:38:59,665 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897317286] [2019-10-14 23:38:59,665 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:38:59,665 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:38:59,665 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:38:59,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:00,021 WARN L191 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2019-10-14 23:39:00,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:00,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:00,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:00,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:00,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:00,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:00,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:00,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:39:00,114 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897317286] [2019-10-14 23:39:00,115 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:39:00,115 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-14 23:39:00,115 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375923873] [2019-10-14 23:39:00,116 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 23:39:00,116 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:39:00,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 23:39:00,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:39:00,118 INFO L87 Difference]: Start difference. First operand 134 states and 154 transitions. Second operand 8 states. [2019-10-14 23:39:00,564 WARN L191 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2019-10-14 23:39:00,917 WARN L191 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2019-10-14 23:39:01,211 WARN L191 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2019-10-14 23:39:01,482 WARN L191 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2019-10-14 23:39:02,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:39:02,827 INFO L93 Difference]: Finished difference Result 271 states and 327 transitions. [2019-10-14 23:39:02,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 23:39:02,827 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 51 [2019-10-14 23:39:02,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:39:02,830 INFO L225 Difference]: With dead ends: 271 [2019-10-14 23:39:02,830 INFO L226 Difference]: Without dead ends: 161 [2019-10-14 23:39:02,833 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:39:02,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2019-10-14 23:39:02,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 134. [2019-10-14 23:39:02,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-10-14 23:39:02,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 153 transitions. [2019-10-14 23:39:02,868 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 153 transitions. Word has length 51 [2019-10-14 23:39:02,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:39:02,869 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 153 transitions. [2019-10-14 23:39:02,869 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 23:39:02,869 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 153 transitions. [2019-10-14 23:39:02,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-10-14 23:39:02,871 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:39:02,871 INFO L380 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] [2019-10-14 23:39:02,871 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:39:02,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:39:02,872 INFO L82 PathProgramCache]: Analyzing trace with hash -316946775, now seen corresponding path program 1 times [2019-10-14 23:39:02,872 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:39:02,872 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699931006] [2019-10-14 23:39:02,873 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:39:02,873 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:39:02,873 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:39:02,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:03,158 WARN L191 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2019-10-14 23:39:03,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:03,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:03,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:03,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:03,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:03,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:03,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:03,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:03,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:03,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:03,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:39:03,250 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699931006] [2019-10-14 23:39:03,250 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:39:03,251 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 23:39:03,251 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843826759] [2019-10-14 23:39:03,251 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:39:03,251 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:39:03,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:39:03,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:39:03,252 INFO L87 Difference]: Start difference. First operand 134 states and 153 transitions. Second operand 6 states. [2019-10-14 23:39:03,702 WARN L191 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2019-10-14 23:39:05,042 WARN L191 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2019-10-14 23:39:05,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:39:05,722 INFO L93 Difference]: Finished difference Result 363 states and 443 transitions. [2019-10-14 23:39:05,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 23:39:05,723 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 64 [2019-10-14 23:39:05,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:39:05,726 INFO L225 Difference]: With dead ends: 363 [2019-10-14 23:39:05,727 INFO L226 Difference]: Without dead ends: 253 [2019-10-14 23:39:05,728 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2019-10-14 23:39:05,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2019-10-14 23:39:05,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 212. [2019-10-14 23:39:05,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2019-10-14 23:39:05,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 240 transitions. [2019-10-14 23:39:05,770 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 240 transitions. Word has length 64 [2019-10-14 23:39:05,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:39:05,771 INFO L462 AbstractCegarLoop]: Abstraction has 212 states and 240 transitions. [2019-10-14 23:39:05,771 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:39:05,771 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 240 transitions. [2019-10-14 23:39:05,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-10-14 23:39:05,773 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:39:05,773 INFO L380 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] [2019-10-14 23:39:05,773 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:39:05,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:39:05,774 INFO L82 PathProgramCache]: Analyzing trace with hash 924041624, now seen corresponding path program 1 times [2019-10-14 23:39:05,774 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:39:05,774 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757564265] [2019-10-14 23:39:05,774 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:39:05,774 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:39:05,775 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:39:05,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:06,115 WARN L191 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2019-10-14 23:39:06,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:06,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:06,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:06,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:06,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:06,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:06,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:06,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:06,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:06,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:06,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:06,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:06,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:39:06,287 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757564265] [2019-10-14 23:39:06,287 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:39:06,287 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2019-10-14 23:39:06,288 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620582404] [2019-10-14 23:39:06,288 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 23:39:06,288 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:39:06,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 23:39:06,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:39:06,289 INFO L87 Difference]: Start difference. First operand 212 states and 240 transitions. Second operand 12 states. [2019-10-14 23:39:06,826 WARN L191 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2019-10-14 23:39:07,206 WARN L191 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2019-10-14 23:39:07,501 WARN L191 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2019-10-14 23:39:07,769 WARN L191 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2019-10-14 23:39:08,414 WARN L191 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2019-10-14 23:39:09,423 WARN L191 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2019-10-14 23:39:09,804 WARN L191 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2019-10-14 23:39:10,139 WARN L191 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2019-10-14 23:39:10,469 WARN L191 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2019-10-14 23:39:10,838 WARN L191 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2019-10-14 23:39:11,126 WARN L191 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2019-10-14 23:39:12,669 WARN L191 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2019-10-14 23:39:13,105 WARN L191 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2019-10-14 23:39:13,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:39:13,905 INFO L93 Difference]: Finished difference Result 745 states and 951 transitions. [2019-10-14 23:39:13,905 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-14 23:39:13,905 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 78 [2019-10-14 23:39:13,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:39:13,910 INFO L225 Difference]: With dead ends: 745 [2019-10-14 23:39:13,910 INFO L226 Difference]: Without dead ends: 557 [2019-10-14 23:39:13,911 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=155, Invalid=547, Unknown=0, NotChecked=0, Total=702 [2019-10-14 23:39:13,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2019-10-14 23:39:14,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 499. [2019-10-14 23:39:14,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 499 states. [2019-10-14 23:39:14,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 583 transitions. [2019-10-14 23:39:14,019 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 583 transitions. Word has length 78 [2019-10-14 23:39:14,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:39:14,019 INFO L462 AbstractCegarLoop]: Abstraction has 499 states and 583 transitions. [2019-10-14 23:39:14,019 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 23:39:14,020 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 583 transitions. [2019-10-14 23:39:14,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-10-14 23:39:14,023 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:39:14,024 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:39:14,024 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:39:14,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:39:14,025 INFO L82 PathProgramCache]: Analyzing trace with hash -2049323846, now seen corresponding path program 1 times [2019-10-14 23:39:14,025 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:39:14,025 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525231807] [2019-10-14 23:39:14,025 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:39:14,026 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:39:14,026 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:39:14,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:14,305 WARN L191 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2019-10-14 23:39:14,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:14,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:14,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:14,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:14,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:14,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:14,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:14,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:14,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:14,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:14,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:14,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:14,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:14,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:14,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:14,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:14,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:14,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:14,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:14,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:14,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:14,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:14,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:14,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:14,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:14,476 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 17 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-14 23:39:14,477 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525231807] [2019-10-14 23:39:14,477 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207818089] [2019-10-14 23:39:14,477 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:39:14,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:14,687 INFO L256 TraceCheckSpWp]: Trace formula consists of 877 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-14 23:39:14,701 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:39:14,919 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:39:14,919 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:39:14,920 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 16 [2019-10-14 23:39:14,920 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45242953] [2019-10-14 23:39:14,921 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 23:39:14,921 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:39:14,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 23:39:14,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2019-10-14 23:39:14,922 INFO L87 Difference]: Start difference. First operand 499 states and 583 transitions. Second operand 8 states. [2019-10-14 23:39:16,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:39:16,267 INFO L93 Difference]: Finished difference Result 1250 states and 1614 transitions. [2019-10-14 23:39:16,267 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 23:39:16,268 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 152 [2019-10-14 23:39:16,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:39:16,274 INFO L225 Difference]: With dead ends: 1250 [2019-10-14 23:39:16,274 INFO L226 Difference]: Without dead ends: 892 [2019-10-14 23:39:16,276 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2019-10-14 23:39:16,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 892 states. [2019-10-14 23:39:16,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 892 to 821. [2019-10-14 23:39:16,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 821 states. [2019-10-14 23:39:16,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 1002 transitions. [2019-10-14 23:39:16,434 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 1002 transitions. Word has length 152 [2019-10-14 23:39:16,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:39:16,435 INFO L462 AbstractCegarLoop]: Abstraction has 821 states and 1002 transitions. [2019-10-14 23:39:16,435 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 23:39:16,435 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 1002 transitions. [2019-10-14 23:39:16,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2019-10-14 23:39:16,438 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:39:16,438 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:39:16,642 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:39:16,644 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:39:16,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:39:16,645 INFO L82 PathProgramCache]: Analyzing trace with hash 173885476, now seen corresponding path program 1 times [2019-10-14 23:39:16,645 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:39:16,645 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264807322] [2019-10-14 23:39:16,646 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:39:16,646 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:39:16,646 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:39:16,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:16,988 WARN L191 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2019-10-14 23:39:16,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:17,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:17,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:17,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:17,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:17,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:17,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:17,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:17,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:17,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:17,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:17,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:17,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:17,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:17,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:17,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:17,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:17,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:17,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:17,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:17,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:17,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:17,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:17,186 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-14 23:39:17,186 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264807322] [2019-10-14 23:39:17,187 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442990467] [2019-10-14 23:39:17,187 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:39:17,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:17,381 INFO L256 TraceCheckSpWp]: Trace formula consists of 858 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-14 23:39:17,388 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:39:17,405 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-14 23:39:17,406 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:39:17,406 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 10 [2019-10-14 23:39:17,406 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921266089] [2019-10-14 23:39:17,407 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:39:17,407 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:39:17,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:39:17,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-10-14 23:39:17,408 INFO L87 Difference]: Start difference. First operand 821 states and 1002 transitions. Second operand 6 states. [2019-10-14 23:39:17,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:39:17,596 INFO L93 Difference]: Finished difference Result 1646 states and 2084 transitions. [2019-10-14 23:39:17,597 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 23:39:17,597 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 143 [2019-10-14 23:39:17,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:39:17,603 INFO L225 Difference]: With dead ends: 1646 [2019-10-14 23:39:17,603 INFO L226 Difference]: Without dead ends: 849 [2019-10-14 23:39:17,606 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2019-10-14 23:39:17,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 849 states. [2019-10-14 23:39:17,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 849 to 841. [2019-10-14 23:39:17,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 841 states. [2019-10-14 23:39:17,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 1026 transitions. [2019-10-14 23:39:17,753 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 1026 transitions. Word has length 143 [2019-10-14 23:39:17,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:39:17,753 INFO L462 AbstractCegarLoop]: Abstraction has 841 states and 1026 transitions. [2019-10-14 23:39:17,754 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:39:17,754 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 1026 transitions. [2019-10-14 23:39:17,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2019-10-14 23:39:17,756 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:39:17,756 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:39:17,962 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:39:17,963 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:39:17,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:39:17,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1445089438, now seen corresponding path program 1 times [2019-10-14 23:39:17,965 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:39:17,965 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598898130] [2019-10-14 23:39:17,965 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:39:17,966 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:39:17,966 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:39:17,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:18,243 WARN L191 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2019-10-14 23:39:18,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:18,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:18,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:18,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:18,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:18,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:18,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:18,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:18,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:18,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:18,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:18,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:18,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:18,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:18,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:18,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:18,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:18,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:18,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:18,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:18,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:18,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:18,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:18,463 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-14 23:39:18,463 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598898130] [2019-10-14 23:39:18,463 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968725439] [2019-10-14 23:39:18,464 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:39:18,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:18,687 INFO L256 TraceCheckSpWp]: Trace formula consists of 859 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 23:39:18,693 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:39:18,769 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-14 23:39:18,769 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:39:18,769 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 15 [2019-10-14 23:39:18,770 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935016247] [2019-10-14 23:39:18,770 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:39:18,771 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:39:18,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:39:18,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2019-10-14 23:39:18,771 INFO L87 Difference]: Start difference. First operand 841 states and 1026 transitions. Second operand 5 states. [2019-10-14 23:39:18,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:39:18,940 INFO L93 Difference]: Finished difference Result 1482 states and 1850 transitions. [2019-10-14 23:39:18,941 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 23:39:18,941 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 143 [2019-10-14 23:39:18,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:39:18,945 INFO L225 Difference]: With dead ends: 1482 [2019-10-14 23:39:18,946 INFO L226 Difference]: Without dead ends: 665 [2019-10-14 23:39:18,948 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2019-10-14 23:39:18,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2019-10-14 23:39:19,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 665. [2019-10-14 23:39:19,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 665 states. [2019-10-14 23:39:19,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 804 transitions. [2019-10-14 23:39:19,097 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 804 transitions. Word has length 143 [2019-10-14 23:39:19,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:39:19,098 INFO L462 AbstractCegarLoop]: Abstraction has 665 states and 804 transitions. [2019-10-14 23:39:19,098 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:39:19,098 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 804 transitions. [2019-10-14 23:39:19,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-10-14 23:39:19,100 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:39:19,100 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:39:19,306 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:39:19,306 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:39:19,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:39:19,307 INFO L82 PathProgramCache]: Analyzing trace with hash -416837817, now seen corresponding path program 1 times [2019-10-14 23:39:19,307 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:39:19,307 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65697735] [2019-10-14 23:39:19,307 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:39:19,308 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:39:19,308 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:39:19,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:19,583 WARN L191 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2019-10-14 23:39:19,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:19,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:19,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:19,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:19,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:19,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:19,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:19,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:19,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:19,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:19,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:19,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:19,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:19,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:19,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:19,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:19,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:19,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:19,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:19,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:19,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:19,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:19,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:19,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:19,769 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-14 23:39:19,769 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65697735] [2019-10-14 23:39:19,770 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845219688] [2019-10-14 23:39:19,770 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:39:19,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:19,996 INFO L256 TraceCheckSpWp]: Trace formula consists of 868 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-14 23:39:20,007 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:39:20,162 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:39:20,163 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:39:20,163 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2019-10-14 23:39:20,163 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498342734] [2019-10-14 23:39:20,164 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-14 23:39:20,164 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:39:20,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-14 23:39:20,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2019-10-14 23:39:20,165 INFO L87 Difference]: Start difference. First operand 665 states and 804 transitions. Second operand 17 states. [2019-10-14 23:39:20,825 WARN L191 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2019-10-14 23:39:21,598 WARN L191 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2019-10-14 23:39:22,848 WARN L191 SmtUtils]: Spent 303.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2019-10-14 23:39:23,218 WARN L191 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2019-10-14 23:39:23,544 WARN L191 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2019-10-14 23:39:24,094 WARN L191 SmtUtils]: Spent 493.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 188 [2019-10-14 23:39:24,459 WARN L191 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2019-10-14 23:39:24,775 WARN L191 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2019-10-14 23:39:25,629 WARN L191 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2019-10-14 23:39:25,941 WARN L191 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2019-10-14 23:39:26,251 WARN L191 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2019-10-14 23:39:26,557 WARN L191 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2019-10-14 23:39:27,229 WARN L191 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2019-10-14 23:39:27,540 WARN L191 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2019-10-14 23:39:27,827 WARN L191 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2019-10-14 23:39:28,134 WARN L191 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2019-10-14 23:39:29,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:39:29,517 INFO L93 Difference]: Finished difference Result 1352 states and 1730 transitions. [2019-10-14 23:39:29,517 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-10-14 23:39:29,517 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 147 [2019-10-14 23:39:29,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:39:29,524 INFO L225 Difference]: With dead ends: 1352 [2019-10-14 23:39:29,524 INFO L226 Difference]: Without dead ends: 770 [2019-10-14 23:39:29,528 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=431, Invalid=1461, Unknown=0, NotChecked=0, Total=1892 [2019-10-14 23:39:29,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2019-10-14 23:39:29,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 662. [2019-10-14 23:39:29,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 662 states. [2019-10-14 23:39:29,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 795 transitions. [2019-10-14 23:39:29,667 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 795 transitions. Word has length 147 [2019-10-14 23:39:29,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:39:29,669 INFO L462 AbstractCegarLoop]: Abstraction has 662 states and 795 transitions. [2019-10-14 23:39:29,669 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-14 23:39:29,669 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 795 transitions. [2019-10-14 23:39:29,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2019-10-14 23:39:29,674 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:39:29,674 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:39:29,879 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:39:29,879 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:39:29,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:39:29,880 INFO L82 PathProgramCache]: Analyzing trace with hash -121591931, now seen corresponding path program 1 times [2019-10-14 23:39:29,880 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:39:29,880 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813681029] [2019-10-14 23:39:29,880 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:39:29,880 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:39:29,880 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:39:29,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:30,204 WARN L191 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2019-10-14 23:39:30,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:30,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:30,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:30,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:30,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:30,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:30,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:30,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:30,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:30,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:30,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:30,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:30,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:30,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:30,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:30,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:30,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:30,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:30,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:30,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:30,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:30,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:30,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:30,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:30,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:30,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:30,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:30,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:30,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:30,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:30,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:30,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:30,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:30,400 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-10-14 23:39:30,401 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813681029] [2019-10-14 23:39:30,401 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077029150] [2019-10-14 23:39:30,401 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:39:30,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:30,650 INFO L256 TraceCheckSpWp]: Trace formula consists of 989 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-14 23:39:30,654 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:39:30,779 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:39:30,839 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 79 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-14 23:39:30,839 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:39:30,839 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2019-10-14 23:39:30,840 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477339364] [2019-10-14 23:39:30,840 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-14 23:39:30,840 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:39:30,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-14 23:39:30,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2019-10-14 23:39:30,841 INFO L87 Difference]: Start difference. First operand 662 states and 795 transitions. Second operand 18 states.