/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.ufo.UNBOUNDED.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-03 01:32:16,352 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-03 01:32:16,354 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-03 01:32:16,384 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-03 01:32:16,385 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-03 01:32:16,387 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-03 01:32:16,389 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-03 01:32:16,391 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-03 01:32:16,392 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-03 01:32:16,395 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-03 01:32:16,396 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-03 01:32:16,398 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-03 01:32:16,398 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-03 01:32:16,400 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-03 01:32:16,400 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-03 01:32:16,401 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-03 01:32:16,401 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-03 01:32:16,402 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-03 01:32:16,404 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-03 01:32:16,407 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-03 01:32:16,408 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-03 01:32:16,409 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-03 01:32:16,410 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-03 01:32:16,410 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-03 01:32:16,416 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-03 01:32:16,416 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-03 01:32:16,417 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-03 01:32:16,418 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-03 01:32:16,418 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-03 01:32:16,419 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-03 01:32:16,419 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-03 01:32:16,419 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-03 01:32:16,420 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-03 01:32:16,421 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-03 01:32:16,421 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-03 01:32:16,422 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-03 01:32:16,422 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-03 01:32:16,422 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-03 01:32:16,422 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-03 01:32:16,423 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-03 01:32:16,423 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-03 01:32:16,424 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-03 01:32:16,445 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-03 01:32:16,445 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-03 01:32:16,446 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-03 01:32:16,446 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-03 01:32:16,446 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-03 01:32:16,446 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-03 01:32:16,446 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-03 01:32:16,447 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-03 01:32:16,447 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-03 01:32:16,447 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-03 01:32:16,447 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-03 01:32:16,447 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-03 01:32:16,448 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-03 01:32:16,448 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-03 01:32:16,448 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-03 01:32:16,448 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-03 01:32:16,448 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-03 01:32:16,448 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-03 01:32:16,448 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-03 01:32:16,448 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-03 01:32:16,448 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-03 01:32:16,448 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-03 01:32:16,449 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-03 01:32:16,449 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-03 01:32:16,449 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-03 01:32:16,449 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-03 01:32:16,449 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-03 01:32:16,449 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-03 01:32:16,449 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-03 01:32:16,450 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-03 01:32:16,450 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-03 01:32:16,450 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-03 01:32:16,450 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 01:32:16,450 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-03 01:32:16,450 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-03 01:32:16,450 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-03 01:32:16,450 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-03 01:32:16,450 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-03 01:32:16,450 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-03 01:32:16,450 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-03 01:32:16,451 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-03 01:32:16,451 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-03 01:32:16,627 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-03 01:32:16,655 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-03 01:32:16,656 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-03 01:32:16,657 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-03 01:32:16,657 INFO L275 PluginConnector]: CDTParser initialized [2023-04-03 01:32:16,658 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.ufo.UNBOUNDED.pals.c [2023-04-03 01:32:17,614 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-03 01:32:17,923 INFO L351 CDTParser]: Found 1 translation units. [2023-04-03 01:32:17,924 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.ufo.UNBOUNDED.pals.c [2023-04-03 01:32:17,944 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/680ea68c9/b1410e8141a94adbaf82f8709616af73/FLAG8698f5647 [2023-04-03 01:32:17,961 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/680ea68c9/b1410e8141a94adbaf82f8709616af73 [2023-04-03 01:32:17,963 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-03 01:32:17,967 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-03 01:32:17,978 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-03 01:32:17,978 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-03 01:32:17,982 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-03 01:32:17,982 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 01:32:17" (1/1) ... [2023-04-03 01:32:17,986 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b459867 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:32:17, skipping insertion in model container [2023-04-03 01:32:17,987 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 01:32:17" (1/1) ... [2023-04-03 01:32:18,005 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-03 01:32:18,054 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-03 01:32:18,348 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.ufo.UNBOUNDED.pals.c[14680,14693] [2023-04-03 01:32:18,361 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 01:32:18,373 INFO L203 MainTranslator]: Completed pre-run [2023-04-03 01:32:18,445 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.ufo.UNBOUNDED.pals.c[14680,14693] [2023-04-03 01:32:18,445 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 01:32:18,467 INFO L208 MainTranslator]: Completed translation [2023-04-03 01:32:18,467 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:32:18 WrapperNode [2023-04-03 01:32:18,467 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-03 01:32:18,493 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-03 01:32:18,493 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-03 01:32:18,494 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-03 01:32:18,502 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:32:18" (1/1) ... [2023-04-03 01:32:18,502 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:32:18" (1/1) ... [2023-04-03 01:32:18,510 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:32:18" (1/1) ... [2023-04-03 01:32:18,511 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:32:18" (1/1) ... [2023-04-03 01:32:18,521 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:32:18" (1/1) ... [2023-04-03 01:32:18,525 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:32:18" (1/1) ... [2023-04-03 01:32:18,527 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:32:18" (1/1) ... [2023-04-03 01:32:18,529 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:32:18" (1/1) ... [2023-04-03 01:32:18,532 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-03 01:32:18,533 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-03 01:32:18,533 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-03 01:32:18,533 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-03 01:32:18,533 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:32:18" (1/1) ... [2023-04-03 01:32:18,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 01:32:18,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:32:18,554 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-03 01:32:18,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-03 01:32:18,579 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-03 01:32:18,579 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-03 01:32:18,579 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-03 01:32:18,579 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-03 01:32:18,579 INFO L138 BoogieDeclarations]: Found implementation of procedure write_side1_failed_history [2023-04-03 01:32:18,579 INFO L138 BoogieDeclarations]: Found implementation of procedure read_side1_failed_history [2023-04-03 01:32:18,579 INFO L138 BoogieDeclarations]: Found implementation of procedure write_side2_failed_history [2023-04-03 01:32:18,580 INFO L138 BoogieDeclarations]: Found implementation of procedure read_side2_failed_history [2023-04-03 01:32:18,580 INFO L138 BoogieDeclarations]: Found implementation of procedure write_active_side_history [2023-04-03 01:32:18,580 INFO L138 BoogieDeclarations]: Found implementation of procedure read_active_side_history [2023-04-03 01:32:18,580 INFO L138 BoogieDeclarations]: Found implementation of procedure write_manual_selection_history [2023-04-03 01:32:18,580 INFO L138 BoogieDeclarations]: Found implementation of procedure read_manual_selection_history [2023-04-03 01:32:18,580 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2023-04-03 01:32:18,580 INFO L138 BoogieDeclarations]: Found implementation of procedure flip_the_side [2023-04-03 01:32:18,580 INFO L138 BoogieDeclarations]: Found implementation of procedure Console_task_each_pals_period [2023-04-03 01:32:18,580 INFO L138 BoogieDeclarations]: Found implementation of procedure Side1_activestandby_task_each_pals_period [2023-04-03 01:32:18,580 INFO L138 BoogieDeclarations]: Found implementation of procedure Side2_activestandby_task_each_pals_period [2023-04-03 01:32:18,580 INFO L138 BoogieDeclarations]: Found implementation of procedure Pendulum_prism_task_each_pals_period [2023-04-03 01:32:18,581 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2023-04-03 01:32:18,581 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-03 01:32:18,581 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2023-04-03 01:32:18,581 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-03 01:32:18,581 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-03 01:32:18,581 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-03 01:32:18,581 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-03 01:32:18,581 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-03 01:32:18,581 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-03 01:32:18,581 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-03 01:32:18,581 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-03 01:32:18,581 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-03 01:32:18,581 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-03 01:32:18,582 INFO L130 BoogieDeclarations]: Found specification of procedure write_side1_failed_history [2023-04-03 01:32:18,582 INFO L130 BoogieDeclarations]: Found specification of procedure read_side1_failed_history [2023-04-03 01:32:18,582 INFO L130 BoogieDeclarations]: Found specification of procedure write_side2_failed_history [2023-04-03 01:32:18,582 INFO L130 BoogieDeclarations]: Found specification of procedure read_side2_failed_history [2023-04-03 01:32:18,582 INFO L130 BoogieDeclarations]: Found specification of procedure write_active_side_history [2023-04-03 01:32:18,582 INFO L130 BoogieDeclarations]: Found specification of procedure read_active_side_history [2023-04-03 01:32:18,582 INFO L130 BoogieDeclarations]: Found specification of procedure write_manual_selection_history [2023-04-03 01:32:18,582 INFO L130 BoogieDeclarations]: Found specification of procedure read_manual_selection_history [2023-04-03 01:32:18,582 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-03 01:32:18,582 INFO L130 BoogieDeclarations]: Found specification of procedure flip_the_side [2023-04-03 01:32:18,582 INFO L130 BoogieDeclarations]: Found specification of procedure Console_task_each_pals_period [2023-04-03 01:32:18,582 INFO L130 BoogieDeclarations]: Found specification of procedure Side1_activestandby_task_each_pals_period [2023-04-03 01:32:18,583 INFO L130 BoogieDeclarations]: Found specification of procedure Side2_activestandby_task_each_pals_period [2023-04-03 01:32:18,583 INFO L130 BoogieDeclarations]: Found specification of procedure Pendulum_prism_task_each_pals_period [2023-04-03 01:32:18,583 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-03 01:32:18,583 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-03 01:32:18,583 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-03 01:32:18,583 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-03 01:32:18,583 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-03 01:32:18,583 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-03 01:32:18,583 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-03 01:32:18,583 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-03 01:32:18,670 INFO L236 CfgBuilder]: Building ICFG [2023-04-03 01:32:18,680 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-03 01:32:19,066 INFO L277 CfgBuilder]: Performing block encoding [2023-04-03 01:32:19,156 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-03 01:32:19,156 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-03 01:32:19,158 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 01:32:19 BoogieIcfgContainer [2023-04-03 01:32:19,158 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-03 01:32:19,159 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-03 01:32:19,159 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-03 01:32:19,161 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-03 01:32:19,161 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.04 01:32:17" (1/3) ... [2023-04-03 01:32:19,162 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4561be3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 01:32:19, skipping insertion in model container [2023-04-03 01:32:19,162 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:32:18" (2/3) ... [2023-04-03 01:32:19,162 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4561be3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 01:32:19, skipping insertion in model container [2023-04-03 01:32:19,162 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 01:32:19" (3/3) ... [2023-04-03 01:32:19,163 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_STARTPALS_ActiveStandby.ufo.UNBOUNDED.pals.c [2023-04-03 01:32:19,173 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-03 01:32:19,173 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-03 01:32:19,211 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-03 01:32:19,216 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@61a9af61, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-03 01:32:19,216 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-03 01:32:19,220 INFO L276 IsEmpty]: Start isEmpty. Operand has 189 states, 125 states have (on average 1.472) internal successors, (184), 127 states have internal predecessors, (184), 43 states have call successors, (43), 19 states have call predecessors, (43), 19 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2023-04-03 01:32:19,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-04-03 01:32:19,228 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:32:19,229 INFO L195 NwaCegarLoop]: 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] [2023-04-03 01:32:19,229 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:32:19,233 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:32:19,233 INFO L85 PathProgramCache]: Analyzing trace with hash 558178186, now seen corresponding path program 1 times [2023-04-03 01:32:19,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:32:19,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447404110] [2023-04-03 01:32:19,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:32:19,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:32:19,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:32:19,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 01:32:19,738 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:32:19,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447404110] [2023-04-03 01:32:19,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447404110] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:32:19,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:32:19,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-03 01:32:19,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983134294] [2023-04-03 01:32:19,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:32:19,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-03 01:32:19,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:32:19,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-03 01:32:19,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-03 01:32:19,764 INFO L87 Difference]: Start difference. First operand has 189 states, 125 states have (on average 1.472) internal successors, (184), 127 states have internal predecessors, (184), 43 states have call successors, (43), 19 states have call predecessors, (43), 19 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) [2023-04-03 01:32:19,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:32:19,847 INFO L93 Difference]: Finished difference Result 368 states and 559 transitions. [2023-04-03 01:32:19,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-03 01:32:19,851 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) Word has length 48 [2023-04-03 01:32:19,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:32:19,860 INFO L225 Difference]: With dead ends: 368 [2023-04-03 01:32:19,860 INFO L226 Difference]: Without dead ends: 190 [2023-04-03 01:32:19,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-03 01:32:19,866 INFO L413 NwaCegarLoop]: 249 mSDtfsCounter, 5 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 737 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 01:32:19,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 737 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 01:32:19,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2023-04-03 01:32:19,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 190. [2023-04-03 01:32:19,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 127 states have (on average 1.4488188976377954) internal successors, (184), 128 states have internal predecessors, (184), 43 states have call successors, (43), 20 states have call predecessors, (43), 19 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2023-04-03 01:32:19,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 269 transitions. [2023-04-03 01:32:19,903 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 269 transitions. Word has length 48 [2023-04-03 01:32:19,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:32:19,903 INFO L495 AbstractCegarLoop]: Abstraction has 190 states and 269 transitions. [2023-04-03 01:32:19,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) [2023-04-03 01:32:19,904 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 269 transitions. [2023-04-03 01:32:19,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-04-03 01:32:19,910 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:32:19,911 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-03 01:32:19,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-03 01:32:19,911 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:32:19,911 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:32:19,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1895037546, now seen corresponding path program 1 times [2023-04-03 01:32:19,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:32:19,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104805629] [2023-04-03 01:32:19,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:32:19,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:32:19,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:32:20,486 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-03 01:32:20,486 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:32:20,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104805629] [2023-04-03 01:32:20,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104805629] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:32:20,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439925608] [2023-04-03 01:32:20,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:32:20,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:32:20,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:32:20,503 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 01:32:20,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-03 01:32:20,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:32:20,727 INFO L262 TraceCheckSpWp]: Trace formula consists of 848 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-03 01:32:20,735 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:32:20,858 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 01:32:20,859 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 01:32:20,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439925608] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:32:20,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 01:32:20,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 15 [2023-04-03 01:32:20,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565586323] [2023-04-03 01:32:20,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:32:20,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-03 01:32:20,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:32:20,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-03 01:32:20,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2023-04-03 01:32:20,866 INFO L87 Difference]: Start difference. First operand 190 states and 269 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 6 states have call successors, (17), 5 states have call predecessors, (17), 5 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) [2023-04-03 01:32:21,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:32:21,505 INFO L93 Difference]: Finished difference Result 428 states and 605 transitions. [2023-04-03 01:32:21,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-03 01:32:21,506 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 6 states have call successors, (17), 5 states have call predecessors, (17), 5 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) Word has length 66 [2023-04-03 01:32:21,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:32:21,511 INFO L225 Difference]: With dead ends: 428 [2023-04-03 01:32:21,511 INFO L226 Difference]: Without dead ends: 249 [2023-04-03 01:32:21,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2023-04-03 01:32:21,516 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 506 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1001 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 513 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 1207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 1001 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-03 01:32:21,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [513 Valid, 61 Invalid, 1207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 1001 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-03 01:32:21,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2023-04-03 01:32:21,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 244. [2023-04-03 01:32:21,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 161 states have (on average 1.4409937888198758) internal successors, (232), 163 states have internal predecessors, (232), 54 states have call successors, (54), 29 states have call predecessors, (54), 28 states have return successors, (54), 51 states have call predecessors, (54), 53 states have call successors, (54) [2023-04-03 01:32:21,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 340 transitions. [2023-04-03 01:32:21,555 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 340 transitions. Word has length 66 [2023-04-03 01:32:21,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:32:21,556 INFO L495 AbstractCegarLoop]: Abstraction has 244 states and 340 transitions. [2023-04-03 01:32:21,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 6 states have call successors, (17), 5 states have call predecessors, (17), 5 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) [2023-04-03 01:32:21,556 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 340 transitions. [2023-04-03 01:32:21,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-04-03 01:32:21,562 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:32:21,562 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-03 01:32:21,569 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-03 01:32:21,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:32:21,768 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:32:21,769 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:32:21,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1927572199, now seen corresponding path program 1 times [2023-04-03 01:32:21,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:32:21,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003332499] [2023-04-03 01:32:21,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:32:21,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:32:21,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:32:22,120 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-03 01:32:22,120 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:32:22,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003332499] [2023-04-03 01:32:22,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003332499] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:32:22,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514381044] [2023-04-03 01:32:22,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:32:22,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:32:22,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:32:22,122 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 01:32:22,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-03 01:32:22,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:32:22,281 INFO L262 TraceCheckSpWp]: Trace formula consists of 849 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-03 01:32:22,284 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:32:22,403 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 01:32:22,403 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 01:32:22,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514381044] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:32:22,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 01:32:22,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 15 [2023-04-03 01:32:22,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899961785] [2023-04-03 01:32:22,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:32:22,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-03 01:32:22,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:32:22,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-03 01:32:22,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2023-04-03 01:32:22,405 INFO L87 Difference]: Start difference. First operand 244 states and 340 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 6 states have call successors, (17), 5 states have call predecessors, (17), 5 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) [2023-04-03 01:32:23,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:32:23,003 INFO L93 Difference]: Finished difference Result 430 states and 607 transitions. [2023-04-03 01:32:23,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-03 01:32:23,003 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 6 states have call successors, (17), 5 states have call predecessors, (17), 5 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) Word has length 67 [2023-04-03 01:32:23,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:32:23,005 INFO L225 Difference]: With dead ends: 430 [2023-04-03 01:32:23,005 INFO L226 Difference]: Without dead ends: 248 [2023-04-03 01:32:23,006 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2023-04-03 01:32:23,006 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 495 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 999 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 501 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 1191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 999 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-03 01:32:23,007 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [501 Valid, 69 Invalid, 1191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 999 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-03 01:32:23,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2023-04-03 01:32:23,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 244. [2023-04-03 01:32:23,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 161 states have (on average 1.4409937888198758) internal successors, (232), 163 states have internal predecessors, (232), 54 states have call successors, (54), 29 states have call predecessors, (54), 28 states have return successors, (54), 51 states have call predecessors, (54), 53 states have call successors, (54) [2023-04-03 01:32:23,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 340 transitions. [2023-04-03 01:32:23,025 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 340 transitions. Word has length 67 [2023-04-03 01:32:23,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:32:23,026 INFO L495 AbstractCegarLoop]: Abstraction has 244 states and 340 transitions. [2023-04-03 01:32:23,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 6 states have call successors, (17), 5 states have call predecessors, (17), 5 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) [2023-04-03 01:32:23,026 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 340 transitions. [2023-04-03 01:32:23,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-04-03 01:32:23,027 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:32:23,027 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-03 01:32:23,035 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-03 01:32:23,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-04-03 01:32:23,233 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:32:23,234 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:32:23,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1039266438, now seen corresponding path program 1 times [2023-04-03 01:32:23,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:32:23,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959945855] [2023-04-03 01:32:23,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:32:23,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:32:23,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:32:23,616 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-03 01:32:23,616 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:32:23,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959945855] [2023-04-03 01:32:23,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959945855] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:32:23,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201404052] [2023-04-03 01:32:23,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:32:23,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:32:23,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:32:23,618 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 01:32:23,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-03 01:32:23,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:32:23,770 INFO L262 TraceCheckSpWp]: Trace formula consists of 848 conjuncts, 13 conjunts are in the unsatisfiable core [2023-04-03 01:32:23,772 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:32:23,941 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-03 01:32:23,941 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 01:32:23,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201404052] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:32:23,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 01:32:23,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2023-04-03 01:32:23,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404114741] [2023-04-03 01:32:23,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:32:23,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-03 01:32:23,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:32:23,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-03 01:32:23,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-04-03 01:32:23,943 INFO L87 Difference]: Start difference. First operand 244 states and 340 transitions. Second operand has 8 states, 6 states have (on average 6.5) internal successors, (39), 8 states have internal predecessors, (39), 5 states have call successors, (17), 4 states have call predecessors, (17), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2023-04-03 01:32:24,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:32:24,212 INFO L93 Difference]: Finished difference Result 661 states and 924 transitions. [2023-04-03 01:32:24,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-03 01:32:24,213 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 6.5) internal successors, (39), 8 states have internal predecessors, (39), 5 states have call successors, (17), 4 states have call predecessors, (17), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 69 [2023-04-03 01:32:24,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:32:24,216 INFO L225 Difference]: With dead ends: 661 [2023-04-03 01:32:24,216 INFO L226 Difference]: Without dead ends: 441 [2023-04-03 01:32:24,217 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2023-04-03 01:32:24,219 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 240 mSDsluCounter, 1198 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 1457 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 01:32:24,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 1457 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 01:32:24,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2023-04-03 01:32:24,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 429. [2023-04-03 01:32:24,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 286 states have (on average 1.4405594405594406) internal successors, (412), 291 states have internal predecessors, (412), 94 states have call successors, (94), 47 states have call predecessors, (94), 48 states have return successors, (97), 90 states have call predecessors, (97), 93 states have call successors, (97) [2023-04-03 01:32:24,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 603 transitions. [2023-04-03 01:32:24,258 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 603 transitions. Word has length 69 [2023-04-03 01:32:24,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:32:24,258 INFO L495 AbstractCegarLoop]: Abstraction has 429 states and 603 transitions. [2023-04-03 01:32:24,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 6.5) internal successors, (39), 8 states have internal predecessors, (39), 5 states have call successors, (17), 4 states have call predecessors, (17), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2023-04-03 01:32:24,258 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 603 transitions. [2023-04-03 01:32:24,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-04-03 01:32:24,260 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:32:24,260 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-03 01:32:24,268 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-03 01:32:24,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:32:24,467 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:32:24,467 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:32:24,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1911334742, now seen corresponding path program 1 times [2023-04-03 01:32:24,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:32:24,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634664731] [2023-04-03 01:32:24,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:32:24,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:32:24,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:32:24,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-03 01:32:24,817 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:32:24,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634664731] [2023-04-03 01:32:24,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634664731] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:32:24,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825002735] [2023-04-03 01:32:24,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:32:24,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:32:24,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:32:24,833 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 01:32:24,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-03 01:32:25,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:32:25,045 INFO L262 TraceCheckSpWp]: Trace formula consists of 865 conjuncts, 20 conjunts are in the unsatisfiable core [2023-04-03 01:32:25,047 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:32:25,862 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-03 01:32:25,863 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-03 01:32:27,532 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 8191 disjunctions. This might take some time... [2023-04-03 01:32:30,988 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 8191 disjunctions.