/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 false -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 0.1.25-177f698 [2020-08-21 13:28:28,683 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 13:28:28,688 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 13:28:28,715 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 13:28:28,715 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 13:28:28,717 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 13:28:28,718 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 13:28:28,720 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 13:28:28,722 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 13:28:28,722 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 13:28:28,723 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 13:28:28,724 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 13:28:28,725 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 13:28:28,726 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 13:28:28,727 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 13:28:28,728 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 13:28:28,729 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 13:28:28,730 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 13:28:28,731 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 13:28:28,733 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 13:28:28,735 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 13:28:28,736 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 13:28:28,737 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 13:28:28,738 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 13:28:28,740 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 13:28:28,741 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 13:28:28,741 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 13:28:28,742 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 13:28:28,742 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 13:28:28,743 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 13:28:28,743 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 13:28:28,744 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 13:28:28,745 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 13:28:28,746 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 13:28:28,747 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 13:28:28,747 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 13:28:28,748 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 13:28:28,748 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 13:28:28,748 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 13:28:28,749 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 13:28:28,750 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 13:28:28,751 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 13:28:28,774 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 13:28:28,774 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 13:28:28,775 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 13:28:28,775 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 13:28:28,776 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 13:28:28,776 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 13:28:28,776 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 13:28:28,776 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 13:28:28,776 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 13:28:28,777 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 13:28:28,777 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 13:28:28,777 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 13:28:28,777 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 13:28:28,777 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 13:28:28,778 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 13:28:28,778 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 13:28:28,778 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 13:28:28,778 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 13:28:28,778 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 13:28:28,779 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 13:28:28,779 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 13:28:28,779 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 13:28:28,779 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 13:28:28,780 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 13:28:28,780 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 13:28:28,780 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 13:28:28,780 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 13:28:28,780 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 13:28:28,781 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 13:28:28,781 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 -> false [2020-08-21 13:28:29,076 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 13:28:29,090 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 13:28:29,094 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 13:28:29,097 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 13:28:29,097 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 13:28:29,098 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded/pals_STARTPALS_ActiveStandby.1.ufo.UNBOUNDED.pals.c [2020-08-21 13:28:29,181 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/84f3afcf4/7647e5d7f4f54f09807528ce8a865e47/FLAG616fc412f [2020-08-21 13:28:29,721 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 13:28:29,722 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded/pals_STARTPALS_ActiveStandby.1.ufo.UNBOUNDED.pals.c [2020-08-21 13:28:29,733 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/84f3afcf4/7647e5d7f4f54f09807528ce8a865e47/FLAG616fc412f [2020-08-21 13:28:30,046 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/84f3afcf4/7647e5d7f4f54f09807528ce8a865e47 [2020-08-21 13:28:30,055 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 13:28:30,057 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 13:28:30,058 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 13:28:30,058 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 13:28:30,062 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 13:28:30,063 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 01:28:30" (1/1) ... [2020-08-21 13:28:30,066 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17866592 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:28:30, skipping insertion in model container [2020-08-21 13:28:30,067 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 01:28:30" (1/1) ... [2020-08-21 13:28:30,075 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 13:28:30,126 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 13:28:30,533 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 13:28:30,549 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 13:28:30,656 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 13:28:30,695 INFO L208 MainTranslator]: Completed translation [2020-08-21 13:28:30,695 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:28:30 WrapperNode [2020-08-21 13:28:30,695 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 13:28:30,696 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 13:28:30,696 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 13:28:30,697 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 13:28:30,709 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:28:30" (1/1) ... [2020-08-21 13:28:30,709 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:28:30" (1/1) ... [2020-08-21 13:28:30,723 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:28:30" (1/1) ... [2020-08-21 13:28:30,724 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:28:30" (1/1) ... [2020-08-21 13:28:30,743 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:28:30" (1/1) ... [2020-08-21 13:28:30,763 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:28:30" (1/1) ... [2020-08-21 13:28:30,768 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:28:30" (1/1) ... [2020-08-21 13:28:30,776 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 13:28:30,776 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 13:28:30,776 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 13:28:30,777 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 13:28:30,778 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:28:30" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 13:28:30,842 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 13:28:30,842 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 13:28:30,842 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-21 13:28:30,842 INFO L138 BoogieDeclarations]: Found implementation of procedure write_side1_failed_history [2020-08-21 13:28:30,842 INFO L138 BoogieDeclarations]: Found implementation of procedure read_side1_failed_history [2020-08-21 13:28:30,842 INFO L138 BoogieDeclarations]: Found implementation of procedure write_side2_failed_history [2020-08-21 13:28:30,842 INFO L138 BoogieDeclarations]: Found implementation of procedure read_side2_failed_history [2020-08-21 13:28:30,848 INFO L138 BoogieDeclarations]: Found implementation of procedure write_active_side_history [2020-08-21 13:28:30,848 INFO L138 BoogieDeclarations]: Found implementation of procedure read_active_side_history [2020-08-21 13:28:30,848 INFO L138 BoogieDeclarations]: Found implementation of procedure write_manual_selection_history [2020-08-21 13:28:30,848 INFO L138 BoogieDeclarations]: Found implementation of procedure read_manual_selection_history [2020-08-21 13:28:30,849 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2020-08-21 13:28:30,850 INFO L138 BoogieDeclarations]: Found implementation of procedure flip_the_side [2020-08-21 13:28:30,850 INFO L138 BoogieDeclarations]: Found implementation of procedure Console_task_each_pals_period [2020-08-21 13:28:30,850 INFO L138 BoogieDeclarations]: Found implementation of procedure Side1_activestandby_task_each_pals_period [2020-08-21 13:28:30,850 INFO L138 BoogieDeclarations]: Found implementation of procedure Side2_activestandby_task_each_pals_period [2020-08-21 13:28:30,850 INFO L138 BoogieDeclarations]: Found implementation of procedure Pendulum_prism_task_each_pals_period [2020-08-21 13:28:30,851 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-08-21 13:28:30,851 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 13:28:30,851 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2020-08-21 13:28:30,851 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 13:28:30,851 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-21 13:28:30,852 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-08-21 13:28:30,852 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-08-21 13:28:30,852 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-08-21 13:28:30,852 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-08-21 13:28:30,852 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-21 13:28:30,852 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-21 13:28:30,852 INFO L130 BoogieDeclarations]: Found specification of procedure write_side1_failed_history [2020-08-21 13:28:30,853 INFO L130 BoogieDeclarations]: Found specification of procedure read_side1_failed_history [2020-08-21 13:28:30,853 INFO L130 BoogieDeclarations]: Found specification of procedure write_side2_failed_history [2020-08-21 13:28:30,853 INFO L130 BoogieDeclarations]: Found specification of procedure read_side2_failed_history [2020-08-21 13:28:30,853 INFO L130 BoogieDeclarations]: Found specification of procedure write_active_side_history [2020-08-21 13:28:30,853 INFO L130 BoogieDeclarations]: Found specification of procedure read_active_side_history [2020-08-21 13:28:30,853 INFO L130 BoogieDeclarations]: Found specification of procedure write_manual_selection_history [2020-08-21 13:28:30,854 INFO L130 BoogieDeclarations]: Found specification of procedure read_manual_selection_history [2020-08-21 13:28:30,854 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-08-21 13:28:30,854 INFO L130 BoogieDeclarations]: Found specification of procedure flip_the_side [2020-08-21 13:28:30,854 INFO L130 BoogieDeclarations]: Found specification of procedure Console_task_each_pals_period [2020-08-21 13:28:30,854 INFO L130 BoogieDeclarations]: Found specification of procedure Side1_activestandby_task_each_pals_period [2020-08-21 13:28:30,854 INFO L130 BoogieDeclarations]: Found specification of procedure Side2_activestandby_task_each_pals_period [2020-08-21 13:28:30,854 INFO L130 BoogieDeclarations]: Found specification of procedure Pendulum_prism_task_each_pals_period [2020-08-21 13:28:30,854 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-08-21 13:28:30,855 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 13:28:30,855 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 13:28:30,855 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 13:28:31,671 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 13:28:31,672 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-21 13:28:31,678 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 01:28:31 BoogieIcfgContainer [2020-08-21 13:28:31,678 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 13:28:31,679 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 13:28:31,680 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 13:28:31,683 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 13:28:31,683 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 01:28:30" (1/3) ... [2020-08-21 13:28:31,684 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5007f59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 01:28:31, skipping insertion in model container [2020-08-21 13:28:31,684 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:28:30" (2/3) ... [2020-08-21 13:28:31,685 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5007f59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 01:28:31, skipping insertion in model container [2020-08-21 13:28:31,685 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 01:28:31" (3/3) ... [2020-08-21 13:28:31,687 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_STARTPALS_ActiveStandby.1.ufo.UNBOUNDED.pals.c [2020-08-21 13:28:31,698 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 13:28:31,706 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 13:28:31,720 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 13:28:31,745 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 13:28:31,745 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 13:28:31,745 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 13:28:31,745 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 13:28:31,746 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 13:28:31,746 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 13:28:31,746 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 13:28:31,746 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 13:28:31,771 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states. [2020-08-21 13:28:31,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-08-21 13:28:31,782 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:28:31,783 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] [2020-08-21 13:28:31,784 INFO L427 AbstractCegarLoop]: === Iteration 1 === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:28:31,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:28:31,790 INFO L82 PathProgramCache]: Analyzing trace with hash -1549655252, now seen corresponding path program 1 times [2020-08-21 13:28:31,800 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:28:31,800 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1962735569] [2020-08-21 13:28:31,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:28:32,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:32,340 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-08-21 13:28:32,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:28:32,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:32,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 13:28:32,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:32,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-21 13:28:32,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:32,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 13:28:32,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:32,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:28:32,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:32,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 13:28:32,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:32,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:28:32,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:32,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-21 13:28:32,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:32,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:28:32,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:32,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:28:32,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1962735569] [2020-08-21 13:28:32,594 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:28:32,594 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-21 13:28:32,595 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027470189] [2020-08-21 13:28:32,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 13:28:32,602 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:28:32,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 13:28:32,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-08-21 13:28:32,620 INFO L87 Difference]: Start difference. First operand 242 states. Second operand 9 states. [2020-08-21 13:28:34,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:28:34,251 INFO L93 Difference]: Finished difference Result 456 states and 705 transitions. [2020-08-21 13:28:34,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 13:28:34,256 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 71 [2020-08-21 13:28:34,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:28:34,270 INFO L225 Difference]: With dead ends: 456 [2020-08-21 13:28:34,270 INFO L226 Difference]: Without dead ends: 237 [2020-08-21 13:28:34,278 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 [2020-08-21 13:28:34,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-08-21 13:28:34,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 237. [2020-08-21 13:28:34,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2020-08-21 13:28:34,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 342 transitions. [2020-08-21 13:28:34,369 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 342 transitions. Word has length 71 [2020-08-21 13:28:34,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:28:34,369 INFO L479 AbstractCegarLoop]: Abstraction has 237 states and 342 transitions. [2020-08-21 13:28:34,369 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 13:28:34,370 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 342 transitions. [2020-08-21 13:28:34,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-08-21 13:28:34,376 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:28:34,376 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] [2020-08-21 13:28:34,376 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 13:28:34,377 INFO L427 AbstractCegarLoop]: === Iteration 2 === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:28:34,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:28:34,377 INFO L82 PathProgramCache]: Analyzing trace with hash 695502060, now seen corresponding path program 1 times [2020-08-21 13:28:34,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:28:34,378 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1168915819] [2020-08-21 13:28:34,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:28:34,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:34,639 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-08-21 13:28:34,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:28:34,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:34,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 13:28:34,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:34,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-21 13:28:34,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:34,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 13:28:34,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:34,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:28:34,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:34,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 13:28:34,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:34,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:28:34,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:34,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-21 13:28:34,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:34,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:28:34,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:34,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:28:34,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1168915819] [2020-08-21 13:28:34,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:28:34,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-08-21 13:28:34,925 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357834308] [2020-08-21 13:28:34,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-21 13:28:34,927 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:28:34,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-21 13:28:34,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2020-08-21 13:28:34,928 INFO L87 Difference]: Start difference. First operand 237 states and 342 transitions. Second operand 14 states. [2020-08-21 13:28:35,105 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-08-21 13:28:35,307 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-08-21 13:28:35,478 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-08-21 13:28:37,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:28:37,863 INFO L93 Difference]: Finished difference Result 455 states and 653 transitions. [2020-08-21 13:28:37,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-21 13:28:37,863 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 71 [2020-08-21 13:28:37,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:28:37,867 INFO L225 Difference]: With dead ends: 455 [2020-08-21 13:28:37,870 INFO L226 Difference]: Without dead ends: 237 [2020-08-21 13:28:37,873 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=137, Invalid=369, Unknown=0, NotChecked=0, Total=506 [2020-08-21 13:28:37,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-08-21 13:28:37,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 237. [2020-08-21 13:28:37,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2020-08-21 13:28:37,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 330 transitions. [2020-08-21 13:28:37,933 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 330 transitions. Word has length 71 [2020-08-21 13:28:37,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:28:37,933 INFO L479 AbstractCegarLoop]: Abstraction has 237 states and 330 transitions. [2020-08-21 13:28:37,933 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-21 13:28:37,933 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 330 transitions. [2020-08-21 13:28:37,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-08-21 13:28:37,936 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:28:37,936 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:28:37,937 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 13:28:37,937 INFO L427 AbstractCegarLoop]: === Iteration 3 === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:28:37,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:28:37,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1333871800, now seen corresponding path program 1 times [2020-08-21 13:28:37,937 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:28:37,938 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1082954627] [2020-08-21 13:28:37,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:28:37,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:38,140 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-08-21 13:28:38,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:28:38,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:38,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 13:28:38,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:38,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 13:28:38,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:38,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-21 13:28:38,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:38,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:28:38,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:38,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-21 13:28:38,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:38,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:28:38,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:38,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-08-21 13:28:38,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:38,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:28:38,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:38,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:28:38,317 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1082954627] [2020-08-21 13:28:38,318 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:28:38,318 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-21 13:28:38,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549430711] [2020-08-21 13:28:38,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 13:28:38,319 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:28:38,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 13:28:38,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-08-21 13:28:38,320 INFO L87 Difference]: Start difference. First operand 237 states and 330 transitions. Second operand 11 states. [2020-08-21 13:28:39,296 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-08-21 13:28:40,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:28:40,456 INFO L93 Difference]: Finished difference Result 454 states and 645 transitions. [2020-08-21 13:28:40,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 13:28:40,456 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 82 [2020-08-21 13:28:40,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:28:40,461 INFO L225 Difference]: With dead ends: 454 [2020-08-21 13:28:40,462 INFO L226 Difference]: Without dead ends: 241 [2020-08-21 13:28:40,463 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2020-08-21 13:28:40,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-08-21 13:28:40,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 241. [2020-08-21 13:28:40,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2020-08-21 13:28:40,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 333 transitions. [2020-08-21 13:28:40,499 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 333 transitions. Word has length 82 [2020-08-21 13:28:40,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:28:40,499 INFO L479 AbstractCegarLoop]: Abstraction has 241 states and 333 transitions. [2020-08-21 13:28:40,499 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 13:28:40,499 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 333 transitions. [2020-08-21 13:28:40,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-08-21 13:28:40,502 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:28:40,502 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] [2020-08-21 13:28:40,503 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 13:28:40,503 INFO L427 AbstractCegarLoop]: === Iteration 4 === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:28:40,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:28:40,503 INFO L82 PathProgramCache]: Analyzing trace with hash -1250466386, now seen corresponding path program 1 times [2020-08-21 13:28:40,503 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:28:40,504 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [366770744] [2020-08-21 13:28:40,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:28:40,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:40,754 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-08-21 13:28:40,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:28:40,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:40,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 13:28:40,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:40,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 13:28:40,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:40,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-21 13:28:40,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:40,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:28:40,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:40,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-21 13:28:40,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:40,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:28:40,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:40,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-08-21 13:28:40,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:40,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:28:40,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:40,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-21 13:28:40,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:41,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:28:41,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:41,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-21 13:28:41,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:41,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-21 13:28:41,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:41,084 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-08-21 13:28:41,084 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [366770744] [2020-08-21 13:28:41,085 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:28:41,085 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-08-21 13:28:41,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992842493] [2020-08-21 13:28:41,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-21 13:28:41,086 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:28:41,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-21 13:28:41,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2020-08-21 13:28:41,087 INFO L87 Difference]: Start difference. First operand 241 states and 333 transitions. Second operand 16 states. [2020-08-21 13:28:41,293 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-08-21 13:28:43,138 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-08-21 13:28:44,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:28:44,918 INFO L93 Difference]: Finished difference Result 549 states and 758 transitions. [2020-08-21 13:28:44,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-21 13:28:44,919 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 104 [2020-08-21 13:28:44,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:28:44,924 INFO L225 Difference]: With dead ends: 549 [2020-08-21 13:28:44,924 INFO L226 Difference]: Without dead ends: 332 [2020-08-21 13:28:44,926 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=299, Invalid=891, Unknown=0, NotChecked=0, Total=1190 [2020-08-21 13:28:44,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2020-08-21 13:28:44,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 331. [2020-08-21 13:28:44,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 331 states. [2020-08-21 13:28:44,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 448 transitions. [2020-08-21 13:28:44,964 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 448 transitions. Word has length 104 [2020-08-21 13:28:44,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:28:44,964 INFO L479 AbstractCegarLoop]: Abstraction has 331 states and 448 transitions. [2020-08-21 13:28:44,964 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-21 13:28:44,965 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 448 transitions. [2020-08-21 13:28:44,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-08-21 13:28:44,967 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:28:44,967 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] [2020-08-21 13:28:44,967 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 13:28:44,967 INFO L427 AbstractCegarLoop]: === Iteration 5 === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:28:44,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:28:44,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1479117531, now seen corresponding path program 1 times [2020-08-21 13:28:44,968 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:28:44,968 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1037182644] [2020-08-21 13:28:44,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:28:44,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:45,159 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-08-21 13:28:45,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:28:45,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:45,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 13:28:45,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:45,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 13:28:45,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:45,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-21 13:28:45,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:45,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:28:45,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:45,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-21 13:28:45,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:45,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:28:45,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:45,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-08-21 13:28:45,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:45,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:28:45,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:45,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-21 13:28:45,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:45,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:28:45,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:45,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 13:28:45,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:45,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-21 13:28:45,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:45,467 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-08-21 13:28:45,467 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1037182644] [2020-08-21 13:28:45,468 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:28:45,468 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-08-21 13:28:45,468 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481027546] [2020-08-21 13:28:45,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-21 13:28:45,470 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:28:45,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-21 13:28:45,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2020-08-21 13:28:45,471 INFO L87 Difference]: Start difference. First operand 331 states and 448 transitions. Second operand 16 states. [2020-08-21 13:28:45,654 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-08-21 13:28:47,416 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-08-21 13:28:49,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:28:49,203 INFO L93 Difference]: Finished difference Result 555 states and 766 transitions. [2020-08-21 13:28:49,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-21 13:28:49,204 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 105 [2020-08-21 13:28:49,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:28:49,208 INFO L225 Difference]: With dead ends: 555 [2020-08-21 13:28:49,208 INFO L226 Difference]: Without dead ends: 335 [2020-08-21 13:28:49,210 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 [2020-08-21 13:28:49,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2020-08-21 13:28:49,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 331. [2020-08-21 13:28:49,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 331 states. [2020-08-21 13:28:49,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 448 transitions. [2020-08-21 13:28:49,247 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 448 transitions. Word has length 105 [2020-08-21 13:28:49,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:28:49,248 INFO L479 AbstractCegarLoop]: Abstraction has 331 states and 448 transitions. [2020-08-21 13:28:49,248 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-21 13:28:49,248 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 448 transitions. [2020-08-21 13:28:49,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-08-21 13:28:49,250 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:28:49,251 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] [2020-08-21 13:28:49,251 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 13:28:49,251 INFO L427 AbstractCegarLoop]: === Iteration 6 === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:28:49,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:28:49,252 INFO L82 PathProgramCache]: Analyzing trace with hash -717194829, now seen corresponding path program 1 times [2020-08-21 13:28:49,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:28:49,252 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [425718403] [2020-08-21 13:28:49,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:28:49,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:49,466 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-08-21 13:28:49,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:28:49,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:49,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 13:28:49,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:49,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 13:28:49,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:49,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-21 13:28:49,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:49,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:28:49,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:49,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-21 13:28:49,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:49,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:28:49,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:49,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-08-21 13:28:49,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:49,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:28:49,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:49,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-21 13:28:49,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:49,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:28:49,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:49,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-21 13:28:49,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:49,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-21 13:28:49,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:49,696 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-08-21 13:28:49,696 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [425718403] [2020-08-21 13:28:49,697 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:28:49,697 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-08-21 13:28:49,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34805342] [2020-08-21 13:28:49,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 13:28:49,699 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:28:49,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 13:28:49,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-08-21 13:28:49,699 INFO L87 Difference]: Start difference. First operand 331 states and 448 transitions. Second operand 12 states. [2020-08-21 13:28:50,418 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-08-21 13:28:52,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:28:52,982 INFO L93 Difference]: Finished difference Result 788 states and 1093 transitions. [2020-08-21 13:28:52,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-21 13:28:52,982 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 107 [2020-08-21 13:28:52,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:28:52,988 INFO L225 Difference]: With dead ends: 788 [2020-08-21 13:28:52,988 INFO L226 Difference]: Without dead ends: 568 [2020-08-21 13:28:52,990 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=193, Invalid=457, Unknown=0, NotChecked=0, Total=650 [2020-08-21 13:28:52,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2020-08-21 13:28:53,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 551. [2020-08-21 13:28:53,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 551 states. [2020-08-21 13:28:53,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 551 states to 551 states and 759 transitions. [2020-08-21 13:28:53,079 INFO L78 Accepts]: Start accepts. Automaton has 551 states and 759 transitions. Word has length 107 [2020-08-21 13:28:53,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:28:53,080 INFO L479 AbstractCegarLoop]: Abstraction has 551 states and 759 transitions. [2020-08-21 13:28:53,080 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 13:28:53,080 INFO L276 IsEmpty]: Start isEmpty. Operand 551 states and 759 transitions. [2020-08-21 13:28:53,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-08-21 13:28:53,082 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:28:53,082 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] [2020-08-21 13:28:53,082 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 13:28:53,083 INFO L427 AbstractCegarLoop]: === Iteration 7 === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:28:53,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:28:53,083 INFO L82 PathProgramCache]: Analyzing trace with hash 654438841, now seen corresponding path program 1 times [2020-08-21 13:28:53,083 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:28:53,084 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [382310795] [2020-08-21 13:28:53,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:28:53,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:53,275 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-08-21 13:28:53,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:28:53,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:53,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 13:28:53,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:53,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 13:28:53,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:53,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-21 13:28:53,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:53,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:28:53,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:53,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-21 13:28:53,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:53,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:28:53,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:53,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-08-21 13:28:53,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:53,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:28:53,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:53,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-21 13:28:53,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:53,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:28:53,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:53,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-21 13:28:53,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:53,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-08-21 13:28:53,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:53,493 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-08-21 13:28:53,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [382310795] [2020-08-21 13:28:53,494 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:28:53,494 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-08-21 13:28:53,494 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768840760] [2020-08-21 13:28:53,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 13:28:53,495 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:28:53,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 13:28:53,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-08-21 13:28:53,496 INFO L87 Difference]: Start difference. First operand 551 states and 759 transitions. Second operand 12 states. [2020-08-21 13:28:54,474 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-08-21 13:28:56,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:28:56,813 INFO L93 Difference]: Finished difference Result 1308 states and 1846 transitions. [2020-08-21 13:28:56,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-21 13:28:56,814 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 108 [2020-08-21 13:28:56,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:28:56,822 INFO L225 Difference]: With dead ends: 1308 [2020-08-21 13:28:56,822 INFO L226 Difference]: Without dead ends: 911 [2020-08-21 13:28:56,825 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=193, Invalid=457, Unknown=0, NotChecked=0, Total=650 [2020-08-21 13:28:56,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 911 states. [2020-08-21 13:28:56,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 911 to 905. [2020-08-21 13:28:56,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 905 states. [2020-08-21 13:28:56,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1266 transitions. [2020-08-21 13:28:56,952 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1266 transitions. Word has length 108 [2020-08-21 13:28:56,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:28:56,953 INFO L479 AbstractCegarLoop]: Abstraction has 905 states and 1266 transitions. [2020-08-21 13:28:56,953 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 13:28:56,953 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1266 transitions. [2020-08-21 13:28:56,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-08-21 13:28:56,955 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:28:56,955 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] [2020-08-21 13:28:56,956 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 13:28:56,956 INFO L427 AbstractCegarLoop]: === Iteration 8 === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:28:56,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:28:56,956 INFO L82 PathProgramCache]: Analyzing trace with hash 925446042, now seen corresponding path program 1 times [2020-08-21 13:28:56,956 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:28:56,957 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [504624342] [2020-08-21 13:28:56,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:28:56,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:57,122 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-08-21 13:28:57,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:28:57,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:57,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 13:28:57,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:57,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 13:28:57,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:57,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-21 13:28:57,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:57,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:28:57,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:57,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-21 13:28:57,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:57,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:28:57,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:57,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-08-21 13:28:57,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:57,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:28:57,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:57,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-21 13:28:57,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:57,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:28:57,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:57,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-21 13:28:57,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:57,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-08-21 13:28:57,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:57,373 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-08-21 13:28:57,374 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [504624342] [2020-08-21 13:28:57,374 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:28:57,375 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-08-21 13:28:57,375 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125094993] [2020-08-21 13:28:57,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 13:28:57,376 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:28:57,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 13:28:57,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-08-21 13:28:57,377 INFO L87 Difference]: Start difference. First operand 905 states and 1266 transitions. Second operand 12 states. [2020-08-21 13:28:57,567 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-08-21 13:28:58,942 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-08-21 13:28:59,100 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-08-21 13:29:01,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:29:01,239 INFO L93 Difference]: Finished difference Result 1649 states and 2335 transitions. [2020-08-21 13:29:01,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-21 13:29:01,240 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 109 [2020-08-21 13:29:01,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:29:01,246 INFO L225 Difference]: With dead ends: 1649 [2020-08-21 13:29:01,246 INFO L226 Difference]: Without dead ends: 916 [2020-08-21 13:29:01,255 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=193, Invalid=457, Unknown=0, NotChecked=0, Total=650 [2020-08-21 13:29:01,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 916 states. [2020-08-21 13:29:01,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 916 to 910. [2020-08-21 13:29:01,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 910 states. [2020-08-21 13:29:01,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 910 states to 910 states and 1268 transitions. [2020-08-21 13:29:01,401 INFO L78 Accepts]: Start accepts. Automaton has 910 states and 1268 transitions. Word has length 109 [2020-08-21 13:29:01,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:29:01,403 INFO L479 AbstractCegarLoop]: Abstraction has 910 states and 1268 transitions. [2020-08-21 13:29:01,403 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 13:29:01,403 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states and 1268 transitions. [2020-08-21 13:29:01,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-08-21 13:29:01,406 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:29:01,406 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] [2020-08-21 13:29:01,406 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 13:29:01,407 INFO L427 AbstractCegarLoop]: === Iteration 9 === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:29:01,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:29:01,407 INFO L82 PathProgramCache]: Analyzing trace with hash -625424837, now seen corresponding path program 1 times [2020-08-21 13:29:01,408 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:29:01,408 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1416474461] [2020-08-21 13:29:01,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:29:01,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:01,636 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-08-21 13:29:01,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:29:01,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:01,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 13:29:01,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:01,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 13:29:01,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:01,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-21 13:29:01,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:01,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:29:01,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:01,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-21 13:29:01,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:01,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:29:01,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:01,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-08-21 13:29:01,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:01,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:29:01,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:01,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-21 13:29:01,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:01,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:29:01,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:01,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-21 13:29:01,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:01,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-08-21 13:29:01,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:01,937 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-08-21 13:29:01,938 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1416474461] [2020-08-21 13:29:01,938 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:29:01,938 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-08-21 13:29:01,939 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046145016] [2020-08-21 13:29:01,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 13:29:01,939 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:29:01,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 13:29:01,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-08-21 13:29:01,940 INFO L87 Difference]: Start difference. First operand 910 states and 1268 transitions. Second operand 13 states. [2020-08-21 13:29:03,298 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-08-21 13:29:03,426 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-08-21 13:29:04,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:29:04,286 INFO L93 Difference]: Finished difference Result 1663 states and 2354 transitions. [2020-08-21 13:29:04,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 13:29:04,287 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 108 [2020-08-21 13:29:04,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:29:04,296 INFO L225 Difference]: With dead ends: 1663 [2020-08-21 13:29:04,296 INFO L226 Difference]: Without dead ends: 930 [2020-08-21 13:29:04,301 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 [2020-08-21 13:29:04,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2020-08-21 13:29:04,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 930. [2020-08-21 13:29:04,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 930 states. [2020-08-21 13:29:04,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 930 states to 930 states and 1284 transitions. [2020-08-21 13:29:04,444 INFO L78 Accepts]: Start accepts. Automaton has 930 states and 1284 transitions. Word has length 108 [2020-08-21 13:29:04,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:29:04,444 INFO L479 AbstractCegarLoop]: Abstraction has 930 states and 1284 transitions. [2020-08-21 13:29:04,445 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 13:29:04,445 INFO L276 IsEmpty]: Start isEmpty. Operand 930 states and 1284 transitions. [2020-08-21 13:29:04,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-08-21 13:29:04,450 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:29:04,450 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] [2020-08-21 13:29:04,450 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 13:29:04,451 INFO L427 AbstractCegarLoop]: === Iteration 10 === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:29:04,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:29:04,451 INFO L82 PathProgramCache]: Analyzing trace with hash 442586826, now seen corresponding path program 1 times [2020-08-21 13:29:04,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:29:04,452 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1494462995] [2020-08-21 13:29:04,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:29:04,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:04,660 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-08-21 13:29:04,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:29:04,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:04,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 13:29:04,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:04,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 13:29:04,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:04,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-21 13:29:04,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:04,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:29:04,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:04,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-21 13:29:04,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:04,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:29:04,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:04,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-21 13:29:04,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:04,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:29:04,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:04,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-21 13:29:04,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:04,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:29:04,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:04,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-21 13:29:04,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:04,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-08-21 13:29:04,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:04,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-21 13:29:04,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:04,932 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-08-21 13:29:04,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1494462995] [2020-08-21 13:29:04,933 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:29:04,933 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-08-21 13:29:04,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152253931] [2020-08-21 13:29:04,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 13:29:04,934 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:29:04,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 13:29:04,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-08-21 13:29:04,935 INFO L87 Difference]: Start difference. First operand 930 states and 1284 transitions. Second operand 12 states. [2020-08-21 13:29:05,125 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-08-21 13:29:08,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:29:08,388 INFO L93 Difference]: Finished difference Result 1715 states and 2391 transitions. [2020-08-21 13:29:08,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-21 13:29:08,389 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 117 [2020-08-21 13:29:08,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:29:08,396 INFO L225 Difference]: With dead ends: 1715 [2020-08-21 13:29:08,396 INFO L226 Difference]: Without dead ends: 962 [2020-08-21 13:29:08,399 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=193, Invalid=457, Unknown=0, NotChecked=0, Total=650 [2020-08-21 13:29:08,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 962 states. [2020-08-21 13:29:08,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 962 to 930. [2020-08-21 13:29:08,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 930 states. [2020-08-21 13:29:08,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 930 states to 930 states and 1280 transitions. [2020-08-21 13:29:08,500 INFO L78 Accepts]: Start accepts. Automaton has 930 states and 1280 transitions. Word has length 117 [2020-08-21 13:29:08,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:29:08,501 INFO L479 AbstractCegarLoop]: Abstraction has 930 states and 1280 transitions. [2020-08-21 13:29:08,501 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 13:29:08,501 INFO L276 IsEmpty]: Start isEmpty. Operand 930 states and 1280 transitions. [2020-08-21 13:29:08,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-08-21 13:29:08,504 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:29:08,505 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] [2020-08-21 13:29:08,505 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 13:29:08,505 INFO L427 AbstractCegarLoop]: === Iteration 11 === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:29:08,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:29:08,506 INFO L82 PathProgramCache]: Analyzing trace with hash -208311273, now seen corresponding path program 1 times [2020-08-21 13:29:08,506 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:29:08,507 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [377228685] [2020-08-21 13:29:08,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:29:08,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:08,731 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-08-21 13:29:08,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:29:08,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:08,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 13:29:08,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:08,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 13:29:08,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:08,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-21 13:29:08,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:08,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:29:08,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:08,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-21 13:29:08,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:08,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:29:08,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:08,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-08-21 13:29:08,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:08,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:29:08,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:08,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-21 13:29:08,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:08,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:29:08,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:08,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-21 13:29:08,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:08,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-08-21 13:29:08,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:08,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2020-08-21 13:29:08,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:08,943 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-08-21 13:29:08,943 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [377228685] [2020-08-21 13:29:08,944 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:29:08,944 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-08-21 13:29:08,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868148549] [2020-08-21 13:29:08,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 13:29:08,946 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:29:08,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 13:29:08,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-08-21 13:29:08,946 INFO L87 Difference]: Start difference. First operand 930 states and 1280 transitions. Second operand 13 states. [2020-08-21 13:29:10,277 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-08-21 13:29:10,428 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-08-21 13:29:11,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:29:11,265 INFO L93 Difference]: Finished difference Result 1703 states and 2388 transitions. [2020-08-21 13:29:11,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 13:29:11,266 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 116 [2020-08-21 13:29:11,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:29:11,272 INFO L225 Difference]: With dead ends: 1703 [2020-08-21 13:29:11,272 INFO L226 Difference]: Without dead ends: 950 [2020-08-21 13:29:11,276 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 [2020-08-21 13:29:11,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 950 states. [2020-08-21 13:29:11,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 950 to 950. [2020-08-21 13:29:11,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 950 states. [2020-08-21 13:29:11,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 950 states to 950 states and 1296 transitions. [2020-08-21 13:29:11,370 INFO L78 Accepts]: Start accepts. Automaton has 950 states and 1296 transitions. Word has length 116 [2020-08-21 13:29:11,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:29:11,370 INFO L479 AbstractCegarLoop]: Abstraction has 950 states and 1296 transitions. [2020-08-21 13:29:11,370 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 13:29:11,371 INFO L276 IsEmpty]: Start isEmpty. Operand 950 states and 1296 transitions. [2020-08-21 13:29:11,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-08-21 13:29:11,373 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:29:11,373 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] [2020-08-21 13:29:11,374 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 13:29:11,374 INFO L427 AbstractCegarLoop]: === Iteration 12 === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:29:11,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:29:11,374 INFO L82 PathProgramCache]: Analyzing trace with hash -2072056031, now seen corresponding path program 1 times [2020-08-21 13:29:11,374 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:29:11,375 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1063602637] [2020-08-21 13:29:11,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:29:11,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:11,548 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-08-21 13:29:11,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:29:11,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:11,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 13:29:11,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:11,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 13:29:11,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:11,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-21 13:29:11,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:11,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:29:11,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:11,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-21 13:29:11,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:11,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:29:11,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:11,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-08-21 13:29:11,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:11,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:29:11,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:11,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-21 13:29:11,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:11,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:29:11,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:11,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-21 13:29:11,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:11,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-08-21 13:29:11,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:11,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2020-08-21 13:29:11,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:11,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-08-21 13:29:11,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:11,764 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-08-21 13:29:11,764 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1063602637] [2020-08-21 13:29:11,764 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:29:11,765 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-08-21 13:29:11,765 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439327708] [2020-08-21 13:29:11,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 13:29:11,765 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:29:11,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 13:29:11,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-08-21 13:29:11,767 INFO L87 Difference]: Start difference. First operand 950 states and 1296 transitions. Second operand 13 states. [2020-08-21 13:29:13,179 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-08-21 13:29:13,306 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-08-21 13:29:14,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:29:14,014 INFO L93 Difference]: Finished difference Result 1739 states and 2404 transitions. [2020-08-21 13:29:14,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 13:29:14,015 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 124 [2020-08-21 13:29:14,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:29:14,021 INFO L225 Difference]: With dead ends: 1739 [2020-08-21 13:29:14,021 INFO L226 Difference]: Without dead ends: 966 [2020-08-21 13:29:14,025 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2020-08-21 13:29:14,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 966 states. [2020-08-21 13:29:14,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 966 to 966. [2020-08-21 13:29:14,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 966 states. [2020-08-21 13:29:14,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 966 states to 966 states and 1308 transitions. [2020-08-21 13:29:14,118 INFO L78 Accepts]: Start accepts. Automaton has 966 states and 1308 transitions. Word has length 124 [2020-08-21 13:29:14,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:29:14,119 INFO L479 AbstractCegarLoop]: Abstraction has 966 states and 1308 transitions. [2020-08-21 13:29:14,119 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 13:29:14,119 INFO L276 IsEmpty]: Start isEmpty. Operand 966 states and 1308 transitions. [2020-08-21 13:29:14,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-08-21 13:29:14,121 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:29:14,121 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] [2020-08-21 13:29:14,121 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 13:29:14,122 INFO L427 AbstractCegarLoop]: === Iteration 13 === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:29:14,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:29:14,122 INFO L82 PathProgramCache]: Analyzing trace with hash 689076351, now seen corresponding path program 1 times [2020-08-21 13:29:14,122 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:29:14,122 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1448522092] [2020-08-21 13:29:14,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:29:14,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:14,321 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-08-21 13:29:14,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:29:14,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:14,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 13:29:14,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:14,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 13:29:14,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:14,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-21 13:29:14,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:14,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:29:14,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:14,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-21 13:29:14,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:14,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:29:14,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:14,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-08-21 13:29:14,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:14,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:29:14,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:14,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-21 13:29:14,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:14,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:29:14,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:14,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-21 13:29:14,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:14,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-08-21 13:29:14,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:14,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2020-08-21 13:29:14,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:14,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-08-21 13:29:14,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:14,707 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-08-21 13:29:14,707 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1448522092] [2020-08-21 13:29:14,707 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:29:14,708 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2020-08-21 13:29:14,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871948355] [2020-08-21 13:29:14,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-21 13:29:14,709 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:29:14,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-21 13:29:14,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-08-21 13:29:14,710 INFO L87 Difference]: Start difference. First operand 966 states and 1308 transitions. Second operand 18 states. [2020-08-21 13:29:15,002 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 133 [2020-08-21 13:29:15,171 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-08-21 13:29:15,585 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-08-21 13:29:17,066 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-08-21 13:29:17,232 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-08-21 13:29:17,380 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-08-21 13:29:18,974 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-08-21 13:29:19,129 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-08-21 13:29:21,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:29:21,169 INFO L93 Difference]: Finished difference Result 2593 states and 3617 transitions. [2020-08-21 13:29:21,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-21 13:29:21,170 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 124 [2020-08-21 13:29:21,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:29:21,181 INFO L225 Difference]: With dead ends: 2593 [2020-08-21 13:29:21,181 INFO L226 Difference]: Without dead ends: 1792 [2020-08-21 13:29:21,185 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 [2020-08-21 13:29:21,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1792 states. [2020-08-21 13:29:21,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1792 to 1552. [2020-08-21 13:29:21,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1552 states. [2020-08-21 13:29:21,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1552 states to 1552 states and 2122 transitions. [2020-08-21 13:29:21,347 INFO L78 Accepts]: Start accepts. Automaton has 1552 states and 2122 transitions. Word has length 124 [2020-08-21 13:29:21,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:29:21,348 INFO L479 AbstractCegarLoop]: Abstraction has 1552 states and 2122 transitions. [2020-08-21 13:29:21,348 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-21 13:29:21,348 INFO L276 IsEmpty]: Start isEmpty. Operand 1552 states and 2122 transitions. [2020-08-21 13:29:21,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-08-21 13:29:21,350 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:29:21,350 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] [2020-08-21 13:29:21,350 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 13:29:21,350 INFO L427 AbstractCegarLoop]: === Iteration 14 === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:29:21,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:29:21,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1938608124, now seen corresponding path program 1 times [2020-08-21 13:29:21,351 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:29:21,351 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2125522885] [2020-08-21 13:29:21,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:29:21,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:21,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:29:21,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:21,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 13:29:21,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:21,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 13:29:21,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:21,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-21 13:29:21,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:21,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:29:21,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:21,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-21 13:29:21,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:21,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:29:21,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:21,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-08-21 13:29:21,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:21,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:29:21,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:21,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-21 13:29:21,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:21,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:29:21,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:21,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-21 13:29:21,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:21,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-08-21 13:29:21,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:21,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2020-08-21 13:29:21,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:21,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-08-21 13:29:21,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:21,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2020-08-21 13:29:21,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:21,760 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-08-21 13:29:21,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2125522885] [2020-08-21 13:29:21,761 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:29:21,761 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-08-21 13:29:21,761 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161454444] [2020-08-21 13:29:21,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 13:29:21,762 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:29:21,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 13:29:21,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-08-21 13:29:21,763 INFO L87 Difference]: Start difference. First operand 1552 states and 2122 transitions. Second operand 13 states. [2020-08-21 13:29:23,263 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-08-21 13:29:23,394 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-08-21 13:29:24,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:29:24,256 INFO L93 Difference]: Finished difference Result 2817 states and 3930 transitions. [2020-08-21 13:29:24,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 13:29:24,257 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 131 [2020-08-21 13:29:24,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:29:24,266 INFO L225 Difference]: With dead ends: 2817 [2020-08-21 13:29:24,266 INFO L226 Difference]: Without dead ends: 1592 [2020-08-21 13:29:24,271 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2020-08-21 13:29:24,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1592 states. [2020-08-21 13:29:24,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1592 to 1592. [2020-08-21 13:29:24,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1592 states. [2020-08-21 13:29:24,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1592 states to 1592 states and 2154 transitions. [2020-08-21 13:29:24,463 INFO L78 Accepts]: Start accepts. Automaton has 1592 states and 2154 transitions. Word has length 131 [2020-08-21 13:29:24,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:29:24,464 INFO L479 AbstractCegarLoop]: Abstraction has 1592 states and 2154 transitions. [2020-08-21 13:29:24,464 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 13:29:24,464 INFO L276 IsEmpty]: Start isEmpty. Operand 1592 states and 2154 transitions. [2020-08-21 13:29:24,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-08-21 13:29:24,467 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:29:24,467 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:29:24,467 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 13:29:24,467 INFO L427 AbstractCegarLoop]: === Iteration 15 === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:29:24,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:29:24,468 INFO L82 PathProgramCache]: Analyzing trace with hash -417494266, now seen corresponding path program 1 times [2020-08-21 13:29:24,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:29:24,468 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1357252958] [2020-08-21 13:29:24,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:29:24,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:24,685 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-08-21 13:29:24,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:29:24,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:24,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 13:29:24,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:24,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 13:29:24,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:24,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-21 13:29:24,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:24,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:29:24,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:24,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-21 13:29:24,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:24,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:29:24,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:24,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-08-21 13:29:24,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:24,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:29:24,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:24,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-21 13:29:24,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:24,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:29:24,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:24,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-21 13:29:24,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:24,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-08-21 13:29:24,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:24,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2020-08-21 13:29:24,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:24,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-08-21 13:29:24,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:24,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2020-08-21 13:29:24,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:24,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2020-08-21 13:29:24,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:24,917 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-08-21 13:29:24,917 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1357252958] [2020-08-21 13:29:24,918 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:29:24,918 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-08-21 13:29:24,918 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933277242] [2020-08-21 13:29:24,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 13:29:24,919 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:29:24,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 13:29:24,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-08-21 13:29:24,919 INFO L87 Difference]: Start difference. First operand 1592 states and 2154 transitions. Second operand 13 states. [2020-08-21 13:29:26,482 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-08-21 13:29:26,619 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-08-21 13:29:27,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:29:27,397 INFO L93 Difference]: Finished difference Result 2877 states and 3942 transitions. [2020-08-21 13:29:27,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 13:29:27,398 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 139 [2020-08-21 13:29:27,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:29:27,406 INFO L225 Difference]: With dead ends: 2877 [2020-08-21 13:29:27,406 INFO L226 Difference]: Without dead ends: 1624 [2020-08-21 13:29:27,410 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2020-08-21 13:29:27,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1624 states. [2020-08-21 13:29:27,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1624 to 1624. [2020-08-21 13:29:27,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1624 states. [2020-08-21 13:29:27,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1624 states to 1624 states and 2178 transitions. [2020-08-21 13:29:27,578 INFO L78 Accepts]: Start accepts. Automaton has 1624 states and 2178 transitions. Word has length 139 [2020-08-21 13:29:27,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:29:27,578 INFO L479 AbstractCegarLoop]: Abstraction has 1624 states and 2178 transitions. [2020-08-21 13:29:27,578 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 13:29:27,578 INFO L276 IsEmpty]: Start isEmpty. Operand 1624 states and 2178 transitions. [2020-08-21 13:29:27,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-08-21 13:29:27,580 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:29:27,581 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2020-08-21 13:29:27,581 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-21 13:29:27,581 INFO L427 AbstractCegarLoop]: === Iteration 16 === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:29:27,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:29:27,581 INFO L82 PathProgramCache]: Analyzing trace with hash 678570065, now seen corresponding path program 1 times [2020-08-21 13:29:27,582 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:29:27,582 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [504387179] [2020-08-21 13:29:27,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:29:27,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:27,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:29:27,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:27,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 13:29:27,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:27,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 13:29:27,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:27,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-21 13:29:27,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:27,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:29:27,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:27,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-21 13:29:27,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:27,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:29:27,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:27,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-08-21 13:29:27,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:27,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:29:27,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:27,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-21 13:29:27,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:27,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:29:27,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:27,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-21 13:29:27,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:27,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-08-21 13:29:27,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:27,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2020-08-21 13:29:27,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:27,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-08-21 13:29:27,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:27,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2020-08-21 13:29:27,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:27,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2020-08-21 13:29:27,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:29:27,978 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-08-21 13:29:27,978 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [504387179] [2020-08-21 13:29:27,981 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:29:27,981 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-08-21 13:29:27,985 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341060080] [2020-08-21 13:29:27,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 13:29:27,986 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:29:27,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 13:29:27,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-08-21 13:29:27,986 INFO L87 Difference]: Start difference. First operand 1624 states and 2178 transitions. Second operand 13 states.