/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded/pals_STARTPALS_ActiveStandby.1.ufo.UNBOUNDED.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 11:29:51,333 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 11:29:51,335 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 11:29:51,376 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 11:29:51,376 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 11:29:51,380 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 11:29:51,385 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 11:29:51,387 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 11:29:51,389 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 11:29:51,390 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 11:29:51,393 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 11:29:51,394 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 11:29:51,394 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 11:29:51,395 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 11:29:51,396 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 11:29:51,399 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 11:29:51,401 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 11:29:51,403 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 11:29:51,406 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 11:29:51,410 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 11:29:51,415 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 11:29:51,416 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 11:29:51,418 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 11:29:51,419 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 11:29:51,425 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 11:29:51,425 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 11:29:51,425 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 11:29:51,429 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 11:29:51,429 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 11:29:51,438 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 11:29:51,439 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 11:29:51,439 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 11:29:51,440 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 11:29:51,441 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 11:29:51,442 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 11:29:51,442 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 11:29:51,443 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 11:29:51,443 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 11:29:51,443 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 11:29:51,444 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 11:29:51,445 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 11:29:51,445 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 11:29:51,467 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 11:29:51,467 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 11:29:51,469 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 11:29:51,469 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 11:29:51,469 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 11:29:51,469 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 11:29:51,470 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 11:29:51,470 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 11:29:51,470 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 11:29:51,470 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 11:29:51,470 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 11:29:51,470 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 11:29:51,471 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 11:29:51,471 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 11:29:51,471 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 11:29:51,471 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 11:29:51,471 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 11:29:51,472 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 11:29:51,472 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 11:29:51,472 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 11:29:51,472 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 11:29:51,472 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 11:29:51,473 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 11:29:51,473 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 11:29:51,473 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 11:29:51,473 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 11:29:51,473 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 11:29:51,473 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 11:29:51,474 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 11:29:51,474 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true [2020-08-18 11:29:51,790 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 11:29:51,805 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 11:29:51,809 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 11:29:51,810 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 11:29:51,811 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 11:29:51,811 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded/pals_STARTPALS_ActiveStandby.1.ufo.UNBOUNDED.pals.c [2020-08-18 11:29:51,885 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a2f7b22ff/1d907c03a273448bb55cfbc9f058c120/FLAG5c31b8864 [2020-08-18 11:29:52,404 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 11:29:52,405 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded/pals_STARTPALS_ActiveStandby.1.ufo.UNBOUNDED.pals.c [2020-08-18 11:29:52,419 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a2f7b22ff/1d907c03a273448bb55cfbc9f058c120/FLAG5c31b8864 [2020-08-18 11:29:52,705 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a2f7b22ff/1d907c03a273448bb55cfbc9f058c120 [2020-08-18 11:29:52,716 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 11:29:52,717 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 11:29:52,718 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 11:29:52,719 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 11:29:52,722 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 11:29:52,723 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 11:29:52" (1/1) ... [2020-08-18 11:29:52,727 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51a556b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:29:52, skipping insertion in model container [2020-08-18 11:29:52,727 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 11:29:52" (1/1) ... [2020-08-18 11:29:52,735 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 11:29:52,792 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 11:29:53,082 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 11:29:53,092 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 11:29:53,264 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 11:29:53,289 INFO L208 MainTranslator]: Completed translation [2020-08-18 11:29:53,289 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:29:53 WrapperNode [2020-08-18 11:29:53,290 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 11:29:53,290 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 11:29:53,291 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 11:29:53,291 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 11:29:53,301 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:29:53" (1/1) ... [2020-08-18 11:29:53,301 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:29:53" (1/1) ... [2020-08-18 11:29:53,315 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:29:53" (1/1) ... [2020-08-18 11:29:53,315 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:29:53" (1/1) ... [2020-08-18 11:29:53,335 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:29:53" (1/1) ... [2020-08-18 11:29:53,348 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:29:53" (1/1) ... [2020-08-18 11:29:53,354 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:29:53" (1/1) ... [2020-08-18 11:29:53,360 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 11:29:53,361 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 11:29:53,361 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 11:29:53,361 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 11:29:53,363 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:29:53" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 11:29:53,436 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 11:29:53,436 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 11:29:53,436 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-18 11:29:53,436 INFO L138 BoogieDeclarations]: Found implementation of procedure write_side1_failed_history [2020-08-18 11:29:53,437 INFO L138 BoogieDeclarations]: Found implementation of procedure read_side1_failed_history [2020-08-18 11:29:53,437 INFO L138 BoogieDeclarations]: Found implementation of procedure write_side2_failed_history [2020-08-18 11:29:53,437 INFO L138 BoogieDeclarations]: Found implementation of procedure read_side2_failed_history [2020-08-18 11:29:53,437 INFO L138 BoogieDeclarations]: Found implementation of procedure write_active_side_history [2020-08-18 11:29:53,437 INFO L138 BoogieDeclarations]: Found implementation of procedure read_active_side_history [2020-08-18 11:29:53,437 INFO L138 BoogieDeclarations]: Found implementation of procedure write_manual_selection_history [2020-08-18 11:29:53,438 INFO L138 BoogieDeclarations]: Found implementation of procedure read_manual_selection_history [2020-08-18 11:29:53,438 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2020-08-18 11:29:53,438 INFO L138 BoogieDeclarations]: Found implementation of procedure flip_the_side [2020-08-18 11:29:53,438 INFO L138 BoogieDeclarations]: Found implementation of procedure Console_task_each_pals_period [2020-08-18 11:29:53,438 INFO L138 BoogieDeclarations]: Found implementation of procedure Side1_activestandby_task_each_pals_period [2020-08-18 11:29:53,438 INFO L138 BoogieDeclarations]: Found implementation of procedure Side2_activestandby_task_each_pals_period [2020-08-18 11:29:53,439 INFO L138 BoogieDeclarations]: Found implementation of procedure Pendulum_prism_task_each_pals_period [2020-08-18 11:29:53,439 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-08-18 11:29:53,439 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 11:29:53,439 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2020-08-18 11:29:53,439 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 11:29:53,439 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-18 11:29:53,439 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-08-18 11:29:53,440 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-08-18 11:29:53,440 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-08-18 11:29:53,440 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-08-18 11:29:53,440 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-18 11:29:53,440 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-18 11:29:53,441 INFO L130 BoogieDeclarations]: Found specification of procedure write_side1_failed_history [2020-08-18 11:29:53,441 INFO L130 BoogieDeclarations]: Found specification of procedure read_side1_failed_history [2020-08-18 11:29:53,441 INFO L130 BoogieDeclarations]: Found specification of procedure write_side2_failed_history [2020-08-18 11:29:53,441 INFO L130 BoogieDeclarations]: Found specification of procedure read_side2_failed_history [2020-08-18 11:29:53,441 INFO L130 BoogieDeclarations]: Found specification of procedure write_active_side_history [2020-08-18 11:29:53,441 INFO L130 BoogieDeclarations]: Found specification of procedure read_active_side_history [2020-08-18 11:29:53,441 INFO L130 BoogieDeclarations]: Found specification of procedure write_manual_selection_history [2020-08-18 11:29:53,442 INFO L130 BoogieDeclarations]: Found specification of procedure read_manual_selection_history [2020-08-18 11:29:53,442 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-08-18 11:29:53,442 INFO L130 BoogieDeclarations]: Found specification of procedure flip_the_side [2020-08-18 11:29:53,442 INFO L130 BoogieDeclarations]: Found specification of procedure Console_task_each_pals_period [2020-08-18 11:29:53,442 INFO L130 BoogieDeclarations]: Found specification of procedure Side1_activestandby_task_each_pals_period [2020-08-18 11:29:53,443 INFO L130 BoogieDeclarations]: Found specification of procedure Side2_activestandby_task_each_pals_period [2020-08-18 11:29:53,443 INFO L130 BoogieDeclarations]: Found specification of procedure Pendulum_prism_task_each_pals_period [2020-08-18 11:29:53,443 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-08-18 11:29:53,443 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 11:29:53,443 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 11:29:53,443 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 11:29:54,296 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 11:29:54,296 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-18 11:29:54,303 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 11:29:54 BoogieIcfgContainer [2020-08-18 11:29:54,303 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 11:29:54,304 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 11:29:54,305 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 11:29:54,308 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 11:29:54,308 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 11:29:52" (1/3) ... [2020-08-18 11:29:54,309 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ac127ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 11:29:54, skipping insertion in model container [2020-08-18 11:29:54,309 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:29:53" (2/3) ... [2020-08-18 11:29:54,310 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ac127ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 11:29:54, skipping insertion in model container [2020-08-18 11:29:54,310 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 11:29:54" (3/3) ... [2020-08-18 11:29:54,312 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_STARTPALS_ActiveStandby.1.ufo.UNBOUNDED.pals.c [2020-08-18 11:29:54,322 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 11:29:54,331 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 11:29:54,345 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 11:29:54,369 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 11:29:54,370 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 11:29:54,370 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 11:29:54,370 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 11:29:54,370 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 11:29:54,370 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 11:29:54,371 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 11:29:54,371 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 11:29:54,393 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states. [2020-08-18 11:29:54,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-08-18 11:29:54,403 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:29:54,404 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 11:29:54,404 INFO L427 AbstractCegarLoop]: === Iteration 1 === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:29:54,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:29:54,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1549655252, now seen corresponding path program 1 times [2020-08-18 11:29:54,417 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:29:54,418 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1098214319] [2020-08-18 11:29:54,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:29:54,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:54,925 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-08-18 11:29:54,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:29:54,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:54,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:29:54,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:54,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-18 11:29:54,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:54,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 11:29:54,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:55,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:29:55,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:55,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 11:29:55,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:55,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:29:55,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:55,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-18 11:29:55,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:55,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:29:55,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:55,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 11:29:55,172 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1098214319] [2020-08-18 11:29:55,174 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:29:55,174 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-18 11:29:55,175 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198076797] [2020-08-18 11:29:55,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 11:29:55,181 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:29:55,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 11:29:55,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-08-18 11:29:55,199 INFO L87 Difference]: Start difference. First operand 242 states. Second operand 9 states. [2020-08-18 11:29:56,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:29:56,735 INFO L93 Difference]: Finished difference Result 456 states and 705 transitions. [2020-08-18 11:29:56,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 11:29:56,740 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 71 [2020-08-18 11:29:56,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:29:56,764 INFO L225 Difference]: With dead ends: 456 [2020-08-18 11:29:56,764 INFO L226 Difference]: Without dead ends: 237 [2020-08-18 11:29:56,776 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2020-08-18 11:29:56,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-08-18 11:29:56,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 237. [2020-08-18 11:29:56,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2020-08-18 11:29:56,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 342 transitions. [2020-08-18 11:29:56,861 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 342 transitions. Word has length 71 [2020-08-18 11:29:56,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:29:56,862 INFO L479 AbstractCegarLoop]: Abstraction has 237 states and 342 transitions. [2020-08-18 11:29:56,862 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 11:29:56,862 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 342 transitions. [2020-08-18 11:29:56,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-08-18 11:29:56,866 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:29:56,866 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 11:29:56,866 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 11:29:56,867 INFO L427 AbstractCegarLoop]: === Iteration 2 === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:29:56,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:29:56,867 INFO L82 PathProgramCache]: Analyzing trace with hash 695502060, now seen corresponding path program 1 times [2020-08-18 11:29:56,868 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:29:56,868 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [248779582] [2020-08-18 11:29:56,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:29:56,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:57,116 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-08-18 11:29:57,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:29:57,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:57,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:29:57,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:57,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-18 11:29:57,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:57,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 11:29:57,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:57,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:29:57,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:57,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 11:29:57,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:57,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:29:57,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:57,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-18 11:29:57,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:57,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:29:57,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:57,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 11:29:57,358 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [248779582] [2020-08-18 11:29:57,358 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:29:57,359 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-08-18 11:29:57,359 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413358468] [2020-08-18 11:29:57,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-18 11:29:57,361 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:29:57,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-18 11:29:57,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2020-08-18 11:29:57,362 INFO L87 Difference]: Start difference. First operand 237 states and 342 transitions. Second operand 14 states. [2020-08-18 11:29:57,536 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-08-18 11:29:57,742 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-08-18 11:29:57,884 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-08-18 11:30:00,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:30:00,222 INFO L93 Difference]: Finished difference Result 455 states and 653 transitions. [2020-08-18 11:30:00,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-18 11:30:00,223 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 71 [2020-08-18 11:30:00,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:30:00,226 INFO L225 Difference]: With dead ends: 455 [2020-08-18 11:30:00,226 INFO L226 Difference]: Without dead ends: 237 [2020-08-18 11:30:00,228 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=137, Invalid=369, Unknown=0, NotChecked=0, Total=506 [2020-08-18 11:30:00,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-08-18 11:30:00,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 237. [2020-08-18 11:30:00,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2020-08-18 11:30:00,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 330 transitions. [2020-08-18 11:30:00,263 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 330 transitions. Word has length 71 [2020-08-18 11:30:00,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:30:00,264 INFO L479 AbstractCegarLoop]: Abstraction has 237 states and 330 transitions. [2020-08-18 11:30:00,264 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-18 11:30:00,264 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 330 transitions. [2020-08-18 11:30:00,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-08-18 11:30:00,267 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:30:00,267 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 11:30:00,267 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 11:30:00,267 INFO L427 AbstractCegarLoop]: === Iteration 3 === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:30:00,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:30:00,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1333871800, now seen corresponding path program 1 times [2020-08-18 11:30:00,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:30:00,268 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [418278749] [2020-08-18 11:30:00,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:30:00,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:00,518 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-08-18 11:30:00,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:30:00,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:00,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:30:00,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:00,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 11:30:00,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:00,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-18 11:30:00,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:00,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:30:00,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:00,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 11:30:00,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:00,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:30:00,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:00,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-08-18 11:30:00,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:00,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:30:00,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:00,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 11:30:00,687 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [418278749] [2020-08-18 11:30:00,687 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:30:00,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-18 11:30:00,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372060018] [2020-08-18 11:30:00,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 11:30:00,688 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:30:00,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 11:30:00,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-08-18 11:30:00,689 INFO L87 Difference]: Start difference. First operand 237 states and 330 transitions. Second operand 11 states. [2020-08-18 11:30:01,639 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-08-18 11:30:01,783 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-08-18 11:30:02,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:30:02,999 INFO L93 Difference]: Finished difference Result 454 states and 645 transitions. [2020-08-18 11:30:03,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 11:30:03,000 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 82 [2020-08-18 11:30:03,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:30:03,006 INFO L225 Difference]: With dead ends: 454 [2020-08-18 11:30:03,006 INFO L226 Difference]: Without dead ends: 241 [2020-08-18 11:30:03,007 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2020-08-18 11:30:03,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-08-18 11:30:03,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 241. [2020-08-18 11:30:03,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2020-08-18 11:30:03,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 333 transitions. [2020-08-18 11:30:03,044 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 333 transitions. Word has length 82 [2020-08-18 11:30:03,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:30:03,045 INFO L479 AbstractCegarLoop]: Abstraction has 241 states and 333 transitions. [2020-08-18 11:30:03,045 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 11:30:03,045 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 333 transitions. [2020-08-18 11:30:03,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-08-18 11:30:03,048 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:30:03,048 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-08-18 11:30:03,048 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 11:30:03,049 INFO L427 AbstractCegarLoop]: === Iteration 4 === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:30:03,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:30:03,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1250466386, now seen corresponding path program 1 times [2020-08-18 11:30:03,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:30:03,050 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1086972162] [2020-08-18 11:30:03,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:30:03,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:03,285 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-08-18 11:30:03,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:30:03,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:03,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:30:03,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:03,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 11:30:03,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:03,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-18 11:30:03,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:03,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:30:03,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:03,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 11:30:03,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:03,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:30:03,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:03,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-08-18 11:30:03,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:03,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:30:03,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:03,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-18 11:30:03,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:03,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:30:03,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:03,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 11:30:03,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:03,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-18 11:30:03,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:03,648 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-08-18 11:30:03,648 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1086972162] [2020-08-18 11:30:03,649 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:30:03,649 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-08-18 11:30:03,649 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382622686] [2020-08-18 11:30:03,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-18 11:30:03,650 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:30:03,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-18 11:30:03,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2020-08-18 11:30:03,651 INFO L87 Difference]: Start difference. First operand 241 states and 333 transitions. Second operand 16 states. [2020-08-18 11:30:03,845 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-08-18 11:30:05,707 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-08-18 11:30:07,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:30:07,557 INFO L93 Difference]: Finished difference Result 549 states and 758 transitions. [2020-08-18 11:30:07,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-18 11:30:07,557 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 104 [2020-08-18 11:30:07,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:30:07,565 INFO L225 Difference]: With dead ends: 549 [2020-08-18 11:30:07,565 INFO L226 Difference]: Without dead ends: 332 [2020-08-18 11:30:07,568 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=299, Invalid=891, Unknown=0, NotChecked=0, Total=1190 [2020-08-18 11:30:07,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2020-08-18 11:30:07,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 331. [2020-08-18 11:30:07,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 331 states. [2020-08-18 11:30:07,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 448 transitions. [2020-08-18 11:30:07,636 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 448 transitions. Word has length 104 [2020-08-18 11:30:07,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:30:07,637 INFO L479 AbstractCegarLoop]: Abstraction has 331 states and 448 transitions. [2020-08-18 11:30:07,637 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-18 11:30:07,637 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 448 transitions. [2020-08-18 11:30:07,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-08-18 11:30:07,651 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:30:07,651 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-08-18 11:30:07,652 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 11:30:07,652 INFO L427 AbstractCegarLoop]: === Iteration 5 === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:30:07,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:30:07,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1479117531, now seen corresponding path program 1 times [2020-08-18 11:30:07,653 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:30:07,653 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [517222383] [2020-08-18 11:30:07,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:30:07,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:07,930 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-08-18 11:30:07,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:30:07,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:07,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:30:07,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:07,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 11:30:07,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:07,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-18 11:30:07,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:08,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:30:08,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:08,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 11:30:08,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:08,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:30:08,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:08,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-08-18 11:30:08,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:08,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:30:08,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:08,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-18 11:30:08,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:08,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:30:08,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:08,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 11:30:08,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:08,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-18 11:30:08,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:08,233 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-08-18 11:30:08,234 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [517222383] [2020-08-18 11:30:08,234 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:30:08,234 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-08-18 11:30:08,235 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377177095] [2020-08-18 11:30:08,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-18 11:30:08,236 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:30:08,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-18 11:30:08,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2020-08-18 11:30:08,236 INFO L87 Difference]: Start difference. First operand 331 states and 448 transitions. Second operand 16 states. [2020-08-18 11:30:08,404 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-08-18 11:30:10,182 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-08-18 11:30:11,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:30:11,992 INFO L93 Difference]: Finished difference Result 555 states and 766 transitions. [2020-08-18 11:30:11,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-18 11:30:11,992 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 105 [2020-08-18 11:30:11,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:30:11,997 INFO L225 Difference]: With dead ends: 555 [2020-08-18 11:30:11,997 INFO L226 Difference]: Without dead ends: 335 [2020-08-18 11:30:11,999 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=299, Invalid=891, Unknown=0, NotChecked=0, Total=1190 [2020-08-18 11:30:12,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2020-08-18 11:30:12,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 331. [2020-08-18 11:30:12,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 331 states. [2020-08-18 11:30:12,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 448 transitions. [2020-08-18 11:30:12,035 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 448 transitions. Word has length 105 [2020-08-18 11:30:12,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:30:12,036 INFO L479 AbstractCegarLoop]: Abstraction has 331 states and 448 transitions. [2020-08-18 11:30:12,036 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-18 11:30:12,036 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 448 transitions. [2020-08-18 11:30:12,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-08-18 11:30:12,037 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:30:12,038 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-08-18 11:30:12,038 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 11:30:12,038 INFO L427 AbstractCegarLoop]: === Iteration 6 === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:30:12,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:30:12,038 INFO L82 PathProgramCache]: Analyzing trace with hash -717194829, now seen corresponding path program 1 times [2020-08-18 11:30:12,039 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:30:12,039 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1388436364] [2020-08-18 11:30:12,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:30:12,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:12,224 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-08-18 11:30:12,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:30:12,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:12,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:30:12,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:12,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 11:30:12,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:12,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-18 11:30:12,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:12,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:30:12,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:12,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 11:30:12,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:12,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:30:12,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:12,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-08-18 11:30:12,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:12,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:30:12,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:12,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-18 11:30:12,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:12,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:30:12,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:12,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-18 11:30:12,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:12,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-18 11:30:12,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:12,453 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-08-18 11:30:12,453 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1388436364] [2020-08-18 11:30:12,455 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:30:12,455 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-08-18 11:30:12,455 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721314357] [2020-08-18 11:30:12,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-18 11:30:12,459 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:30:12,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-18 11:30:12,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-08-18 11:30:12,460 INFO L87 Difference]: Start difference. First operand 331 states and 448 transitions. Second operand 12 states. [2020-08-18 11:30:13,267 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-08-18 11:30:15,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:30:15,925 INFO L93 Difference]: Finished difference Result 788 states and 1093 transitions. [2020-08-18 11:30:15,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-18 11:30:15,925 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 107 [2020-08-18 11:30:15,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:30:15,931 INFO L225 Difference]: With dead ends: 788 [2020-08-18 11:30:15,931 INFO L226 Difference]: Without dead ends: 568 [2020-08-18 11:30:15,933 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=193, Invalid=457, Unknown=0, NotChecked=0, Total=650 [2020-08-18 11:30:15,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2020-08-18 11:30:15,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 551. [2020-08-18 11:30:15,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 551 states. [2020-08-18 11:30:16,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 551 states to 551 states and 759 transitions. [2020-08-18 11:30:16,002 INFO L78 Accepts]: Start accepts. Automaton has 551 states and 759 transitions. Word has length 107 [2020-08-18 11:30:16,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:30:16,002 INFO L479 AbstractCegarLoop]: Abstraction has 551 states and 759 transitions. [2020-08-18 11:30:16,002 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-18 11:30:16,003 INFO L276 IsEmpty]: Start isEmpty. Operand 551 states and 759 transitions. [2020-08-18 11:30:16,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-08-18 11:30:16,004 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:30:16,005 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-08-18 11:30:16,005 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 11:30:16,005 INFO L427 AbstractCegarLoop]: === Iteration 7 === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:30:16,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:30:16,006 INFO L82 PathProgramCache]: Analyzing trace with hash 654438841, now seen corresponding path program 1 times [2020-08-18 11:30:16,006 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:30:16,006 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1773891425] [2020-08-18 11:30:16,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:30:16,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:16,175 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-08-18 11:30:16,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:30:16,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:16,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:30:16,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:16,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 11:30:16,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:16,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-18 11:30:16,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:16,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:30:16,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:16,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 11:30:16,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:16,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:30:16,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:16,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-08-18 11:30:16,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:16,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:30:16,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:16,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-18 11:30:16,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:16,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:30:16,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:16,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-18 11:30:16,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:16,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-08-18 11:30:16,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:16,481 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-08-18 11:30:16,481 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1773891425] [2020-08-18 11:30:16,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:30:16,482 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-08-18 11:30:16,482 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106561355] [2020-08-18 11:30:16,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-18 11:30:16,483 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:30:16,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-18 11:30:16,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-08-18 11:30:16,484 INFO L87 Difference]: Start difference. First operand 551 states and 759 transitions. Second operand 12 states. [2020-08-18 11:30:17,569 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-08-18 11:30:20,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:30:20,257 INFO L93 Difference]: Finished difference Result 1308 states and 1846 transitions. [2020-08-18 11:30:20,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-18 11:30:20,258 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 108 [2020-08-18 11:30:20,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:30:20,270 INFO L225 Difference]: With dead ends: 1308 [2020-08-18 11:30:20,270 INFO L226 Difference]: Without dead ends: 911 [2020-08-18 11:30:20,273 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=193, Invalid=457, Unknown=0, NotChecked=0, Total=650 [2020-08-18 11:30:20,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 911 states. [2020-08-18 11:30:20,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 911 to 905. [2020-08-18 11:30:20,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 905 states. [2020-08-18 11:30:20,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1266 transitions. [2020-08-18 11:30:20,404 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1266 transitions. Word has length 108 [2020-08-18 11:30:20,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:30:20,405 INFO L479 AbstractCegarLoop]: Abstraction has 905 states and 1266 transitions. [2020-08-18 11:30:20,405 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-18 11:30:20,405 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1266 transitions. [2020-08-18 11:30:20,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-08-18 11:30:20,408 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:30:20,408 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-08-18 11:30:20,409 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 11:30:20,409 INFO L427 AbstractCegarLoop]: === Iteration 8 === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:30:20,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:30:20,409 INFO L82 PathProgramCache]: Analyzing trace with hash 925446042, now seen corresponding path program 1 times [2020-08-18 11:30:20,409 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:30:20,415 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1847847568] [2020-08-18 11:30:20,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:30:20,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:20,607 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-08-18 11:30:20,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:30:20,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:20,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:30:20,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:20,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 11:30:20,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:20,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-18 11:30:20,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:20,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:30:20,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:20,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 11:30:20,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:20,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:30:20,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:20,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-08-18 11:30:20,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:20,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:30:20,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:20,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-18 11:30:20,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:20,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:30:20,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:20,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-18 11:30:20,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:20,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-08-18 11:30:20,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:20,854 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-08-18 11:30:20,855 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1847847568] [2020-08-18 11:30:20,855 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:30:20,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-08-18 11:30:20,856 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106821990] [2020-08-18 11:30:20,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-18 11:30:20,856 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:30:20,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-18 11:30:20,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-08-18 11:30:20,857 INFO L87 Difference]: Start difference. First operand 905 states and 1266 transitions. Second operand 12 states. [2020-08-18 11:30:21,030 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-08-18 11:30:24,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:30:24,394 INFO L93 Difference]: Finished difference Result 1649 states and 2335 transitions. [2020-08-18 11:30:24,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-18 11:30:24,394 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 109 [2020-08-18 11:30:24,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:30:24,401 INFO L225 Difference]: With dead ends: 1649 [2020-08-18 11:30:24,402 INFO L226 Difference]: Without dead ends: 916 [2020-08-18 11:30:24,406 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=193, Invalid=457, Unknown=0, NotChecked=0, Total=650 [2020-08-18 11:30:24,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 916 states. [2020-08-18 11:30:24,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 916 to 910. [2020-08-18 11:30:24,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 910 states. [2020-08-18 11:30:24,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 910 states to 910 states and 1268 transitions. [2020-08-18 11:30:24,510 INFO L78 Accepts]: Start accepts. Automaton has 910 states and 1268 transitions. Word has length 109 [2020-08-18 11:30:24,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:30:24,510 INFO L479 AbstractCegarLoop]: Abstraction has 910 states and 1268 transitions. [2020-08-18 11:30:24,510 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-18 11:30:24,510 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states and 1268 transitions. [2020-08-18 11:30:24,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-08-18 11:30:24,512 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:30:24,513 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-08-18 11:30:24,513 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 11:30:24,513 INFO L427 AbstractCegarLoop]: === Iteration 9 === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:30:24,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:30:24,514 INFO L82 PathProgramCache]: Analyzing trace with hash -625424837, now seen corresponding path program 1 times [2020-08-18 11:30:24,514 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:30:24,514 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1571956127] [2020-08-18 11:30:24,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:30:24,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:24,705 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-08-18 11:30:24,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:30:24,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:24,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:30:24,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:24,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 11:30:24,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:24,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-18 11:30:24,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:24,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:30:24,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:24,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 11:30:24,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:24,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:30:24,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:24,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-08-18 11:30:24,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:24,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:30:24,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:24,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-18 11:30:24,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:24,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:30:24,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:24,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-18 11:30:24,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:24,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-08-18 11:30:24,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:24,934 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-08-18 11:30:24,934 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1571956127] [2020-08-18 11:30:24,934 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:30:24,935 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-08-18 11:30:24,935 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950572644] [2020-08-18 11:30:24,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-18 11:30:24,935 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:30:24,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-18 11:30:24,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-08-18 11:30:24,936 INFO L87 Difference]: Start difference. First operand 910 states and 1268 transitions. Second operand 13 states. [2020-08-18 11:30:26,505 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-08-18 11:30:26,637 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-08-18 11:30:27,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:30:27,533 INFO L93 Difference]: Finished difference Result 1663 states and 2354 transitions. [2020-08-18 11:30:27,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 11:30:27,538 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 108 [2020-08-18 11:30:27,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:30:27,544 INFO L225 Difference]: With dead ends: 1663 [2020-08-18 11:30:27,544 INFO L226 Difference]: Without dead ends: 930 [2020-08-18 11:30:27,548 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2020-08-18 11:30:27,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2020-08-18 11:30:27,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 930. [2020-08-18 11:30:27,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 930 states. [2020-08-18 11:30:27,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 930 states to 930 states and 1284 transitions. [2020-08-18 11:30:27,645 INFO L78 Accepts]: Start accepts. Automaton has 930 states and 1284 transitions. Word has length 108 [2020-08-18 11:30:27,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:30:27,646 INFO L479 AbstractCegarLoop]: Abstraction has 930 states and 1284 transitions. [2020-08-18 11:30:27,646 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-18 11:30:27,646 INFO L276 IsEmpty]: Start isEmpty. Operand 930 states and 1284 transitions. [2020-08-18 11:30:27,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-08-18 11:30:27,648 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:30:27,648 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2020-08-18 11:30:27,649 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 11:30:27,649 INFO L427 AbstractCegarLoop]: === Iteration 10 === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:30:27,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:30:27,649 INFO L82 PathProgramCache]: Analyzing trace with hash 442586826, now seen corresponding path program 1 times [2020-08-18 11:30:27,649 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:30:27,650 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1738812853] [2020-08-18 11:30:27,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:30:27,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:27,857 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-08-18 11:30:27,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:30:27,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:27,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:30:27,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:27,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 11:30:27,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:27,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-18 11:30:27,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:27,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:30:27,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:27,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 11:30:27,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:27,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:30:27,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:28,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-18 11:30:28,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:28,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:30:28,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:28,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-18 11:30:28,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:28,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:30:28,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:28,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-18 11:30:28,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:28,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-08-18 11:30:28,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:28,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-18 11:30:28,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:28,171 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-08-18 11:30:28,171 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1738812853] [2020-08-18 11:30:28,172 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:30:28,172 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-08-18 11:30:28,172 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553780470] [2020-08-18 11:30:28,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-18 11:30:28,173 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:30:28,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-18 11:30:28,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-08-18 11:30:28,174 INFO L87 Difference]: Start difference. First operand 930 states and 1284 transitions. Second operand 12 states. [2020-08-18 11:30:28,403 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-08-18 11:30:32,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:30:32,245 INFO L93 Difference]: Finished difference Result 1715 states and 2391 transitions. [2020-08-18 11:30:32,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-18 11:30:32,246 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 117 [2020-08-18 11:30:32,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:30:32,253 INFO L225 Difference]: With dead ends: 1715 [2020-08-18 11:30:32,253 INFO L226 Difference]: Without dead ends: 962 [2020-08-18 11:30:32,257 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=193, Invalid=457, Unknown=0, NotChecked=0, Total=650 [2020-08-18 11:30:32,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 962 states. [2020-08-18 11:30:32,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 962 to 930. [2020-08-18 11:30:32,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 930 states. [2020-08-18 11:30:32,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 930 states to 930 states and 1280 transitions. [2020-08-18 11:30:32,379 INFO L78 Accepts]: Start accepts. Automaton has 930 states and 1280 transitions. Word has length 117 [2020-08-18 11:30:32,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:30:32,380 INFO L479 AbstractCegarLoop]: Abstraction has 930 states and 1280 transitions. [2020-08-18 11:30:32,380 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-18 11:30:32,380 INFO L276 IsEmpty]: Start isEmpty. Operand 930 states and 1280 transitions. [2020-08-18 11:30:32,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-08-18 11:30:32,383 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:30:32,383 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1] [2020-08-18 11:30:32,383 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 11:30:32,383 INFO L427 AbstractCegarLoop]: === Iteration 11 === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:30:32,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:30:32,384 INFO L82 PathProgramCache]: Analyzing trace with hash -208311273, now seen corresponding path program 1 times [2020-08-18 11:30:32,384 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:30:32,384 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1829572497] [2020-08-18 11:30:32,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:30:32,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:32,641 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-08-18 11:30:32,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:30:32,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:32,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:30:32,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:32,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 11:30:32,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:32,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-18 11:30:32,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:32,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:30:32,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:32,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 11:30:32,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:32,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:30:32,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:32,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-08-18 11:30:32,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:32,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:30:32,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:32,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-18 11:30:32,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:32,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:30:32,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:32,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-18 11:30:32,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:32,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-08-18 11:30:32,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:32,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2020-08-18 11:30:32,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:32,859 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-08-18 11:30:32,859 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1829572497] [2020-08-18 11:30:32,860 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:30:32,860 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-08-18 11:30:32,860 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067575643] [2020-08-18 11:30:32,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-18 11:30:32,861 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:30:32,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-18 11:30:32,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-08-18 11:30:32,862 INFO L87 Difference]: Start difference. First operand 930 states and 1280 transitions. Second operand 13 states. [2020-08-18 11:30:34,282 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-08-18 11:30:34,429 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-08-18 11:30:35,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:30:35,524 INFO L93 Difference]: Finished difference Result 1703 states and 2388 transitions. [2020-08-18 11:30:35,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 11:30:35,524 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 116 [2020-08-18 11:30:35,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:30:35,532 INFO L225 Difference]: With dead ends: 1703 [2020-08-18 11:30:35,532 INFO L226 Difference]: Without dead ends: 950 [2020-08-18 11:30:35,536 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2020-08-18 11:30:35,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 950 states. [2020-08-18 11:30:35,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 950 to 950. [2020-08-18 11:30:35,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 950 states. [2020-08-18 11:30:35,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 950 states to 950 states and 1296 transitions. [2020-08-18 11:30:35,648 INFO L78 Accepts]: Start accepts. Automaton has 950 states and 1296 transitions. Word has length 116 [2020-08-18 11:30:35,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:30:35,648 INFO L479 AbstractCegarLoop]: Abstraction has 950 states and 1296 transitions. [2020-08-18 11:30:35,648 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-18 11:30:35,649 INFO L276 IsEmpty]: Start isEmpty. Operand 950 states and 1296 transitions. [2020-08-18 11:30:35,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-08-18 11:30:35,653 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:30:35,653 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 11:30:35,654 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 11:30:35,654 INFO L427 AbstractCegarLoop]: === Iteration 12 === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:30:35,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:30:35,654 INFO L82 PathProgramCache]: Analyzing trace with hash -2072056031, now seen corresponding path program 1 times [2020-08-18 11:30:35,654 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:30:35,657 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1023632192] [2020-08-18 11:30:35,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:30:35,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:35,861 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-08-18 11:30:35,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:30:35,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:35,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:30:35,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:35,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 11:30:35,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:35,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-18 11:30:35,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:35,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:30:35,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:35,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 11:30:35,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:35,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:30:35,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:35,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-08-18 11:30:35,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:36,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:30:36,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:36,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-18 11:30:36,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:36,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:30:36,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:36,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-18 11:30:36,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:36,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-08-18 11:30:36,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:36,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2020-08-18 11:30:36,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:36,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-08-18 11:30:36,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:36,100 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-08-18 11:30:36,101 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1023632192] [2020-08-18 11:30:36,101 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:30:36,101 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-08-18 11:30:36,101 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432551092] [2020-08-18 11:30:36,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-18 11:30:36,102 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:30:36,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-18 11:30:36,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-08-18 11:30:36,103 INFO L87 Difference]: Start difference. First operand 950 states and 1296 transitions. Second operand 13 states. [2020-08-18 11:30:37,681 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-08-18 11:30:37,820 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-08-18 11:30:38,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:30:38,565 INFO L93 Difference]: Finished difference Result 1739 states and 2404 transitions. [2020-08-18 11:30:38,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 11:30:38,566 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 124 [2020-08-18 11:30:38,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:30:38,572 INFO L225 Difference]: With dead ends: 1739 [2020-08-18 11:30:38,573 INFO L226 Difference]: Without dead ends: 966 [2020-08-18 11:30:38,582 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2020-08-18 11:30:38,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 966 states. [2020-08-18 11:30:38,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 966 to 966. [2020-08-18 11:30:38,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 966 states. [2020-08-18 11:30:38,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 966 states to 966 states and 1308 transitions. [2020-08-18 11:30:38,699 INFO L78 Accepts]: Start accepts. Automaton has 966 states and 1308 transitions. Word has length 124 [2020-08-18 11:30:38,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:30:38,700 INFO L479 AbstractCegarLoop]: Abstraction has 966 states and 1308 transitions. [2020-08-18 11:30:38,700 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-18 11:30:38,701 INFO L276 IsEmpty]: Start isEmpty. Operand 966 states and 1308 transitions. [2020-08-18 11:30:38,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-08-18 11:30:38,704 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:30:38,704 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 11:30:38,704 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 11:30:38,705 INFO L427 AbstractCegarLoop]: === Iteration 13 === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:30:38,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:30:38,705 INFO L82 PathProgramCache]: Analyzing trace with hash 689076351, now seen corresponding path program 1 times [2020-08-18 11:30:38,705 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:30:38,706 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [4901456] [2020-08-18 11:30:38,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:30:38,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:38,939 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-08-18 11:30:38,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:30:38,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:38,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:30:38,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:38,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 11:30:38,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:38,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-18 11:30:38,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:39,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:30:39,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:39,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 11:30:39,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:39,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:30:39,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:39,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-08-18 11:30:39,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:39,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:30:39,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:39,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-18 11:30:39,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:39,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:30:39,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:39,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-18 11:30:39,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:39,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-08-18 11:30:39,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:39,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2020-08-18 11:30:39,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:39,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-08-18 11:30:39,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:39,329 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-08-18 11:30:39,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [4901456] [2020-08-18 11:30:39,330 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:30:39,330 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2020-08-18 11:30:39,330 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034305130] [2020-08-18 11:30:39,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-18 11:30:39,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:30:39,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-18 11:30:39,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-08-18 11:30:39,332 INFO L87 Difference]: Start difference. First operand 966 states and 1308 transitions. Second operand 18 states. [2020-08-18 11:30:39,656 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 133 [2020-08-18 11:30:39,834 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-08-18 11:30:40,261 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-08-18 11:30:41,754 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-08-18 11:30:41,928 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-08-18 11:30:42,074 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-08-18 11:30:43,676 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-08-18 11:30:43,832 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-08-18 11:30:45,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:30:45,866 INFO L93 Difference]: Finished difference Result 2593 states and 3617 transitions. [2020-08-18 11:30:45,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-18 11:30:45,866 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 124 [2020-08-18 11:30:45,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:30:45,879 INFO L225 Difference]: With dead ends: 2593 [2020-08-18 11:30:45,879 INFO L226 Difference]: Without dead ends: 1792 [2020-08-18 11:30:45,883 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=410, Invalid=1230, Unknown=0, NotChecked=0, Total=1640 [2020-08-18 11:30:45,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1792 states. [2020-08-18 11:30:46,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1792 to 1552. [2020-08-18 11:30:46,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1552 states. [2020-08-18 11:30:46,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1552 states to 1552 states and 2122 transitions. [2020-08-18 11:30:46,051 INFO L78 Accepts]: Start accepts. Automaton has 1552 states and 2122 transitions. Word has length 124 [2020-08-18 11:30:46,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:30:46,051 INFO L479 AbstractCegarLoop]: Abstraction has 1552 states and 2122 transitions. [2020-08-18 11:30:46,051 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-18 11:30:46,051 INFO L276 IsEmpty]: Start isEmpty. Operand 1552 states and 2122 transitions. [2020-08-18 11:30:46,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-08-18 11:30:46,054 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:30:46,054 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 11:30:46,054 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 11:30:46,054 INFO L427 AbstractCegarLoop]: === Iteration 14 === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:30:46,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:30:46,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1938608124, now seen corresponding path program 1 times [2020-08-18 11:30:46,055 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:30:46,055 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1647346639] [2020-08-18 11:30:46,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:30:46,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:46,245 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-08-18 11:30:46,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:30:46,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:46,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:30:46,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:46,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 11:30:46,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:46,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-18 11:30:46,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:46,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:30:46,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:46,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 11:30:46,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:46,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:30:46,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:46,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-08-18 11:30:46,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:46,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:30:46,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:46,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-18 11:30:46,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:46,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:30:46,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:46,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-18 11:30:46,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:46,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-08-18 11:30:46,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:46,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2020-08-18 11:30:46,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:46,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-08-18 11:30:46,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:46,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2020-08-18 11:30:46,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:46,503 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-08-18 11:30:46,503 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1647346639] [2020-08-18 11:30:46,504 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:30:46,504 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-08-18 11:30:46,504 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934437960] [2020-08-18 11:30:46,505 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-18 11:30:46,505 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:30:46,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-18 11:30:46,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-08-18 11:30:46,506 INFO L87 Difference]: Start difference. First operand 1552 states and 2122 transitions. Second operand 13 states.