/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 EqDomain -i ../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.4_2.ufo.UNBOUNDED.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 12:19:13,687 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 12:19:13,689 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 12:19:13,727 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 12:19:13,727 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 12:19:13,728 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 12:19:13,729 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 12:19:13,731 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 12:19:13,732 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 12:19:13,733 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 12:19:13,734 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 12:19:13,735 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 12:19:13,735 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 12:19:13,736 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 12:19:13,739 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 12:19:13,741 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 12:19:13,742 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 12:19:13,746 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 12:19:13,750 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 12:19:13,752 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 12:19:13,753 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 12:19:13,754 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 12:19:13,754 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 12:19:13,755 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 12:19:13,760 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 12:19:13,760 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 12:19:13,760 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 12:19:13,761 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 12:19:13,761 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 12:19:13,762 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 12:19:13,762 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 12:19:13,763 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 12:19:13,763 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 12:19:13,764 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 12:19:13,765 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 12:19:13,765 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 12:19:13,765 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 12:19:13,766 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 12:19:13,766 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 12:19:13,766 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 12:19:13,767 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 12:19:13,775 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 [2023-04-01 12:19:13,799 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 12:19:13,799 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 12:19:13,800 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 12:19:13,800 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 12:19:13,800 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 12:19:13,800 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 12:19:13,801 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 12:19:13,801 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 12:19:13,801 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 12:19:13,801 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 12:19:13,801 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 12:19:13,801 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 12:19:13,801 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 12:19:13,801 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 12:19:13,802 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 12:19:13,802 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 12:19:13,802 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 12:19:13,802 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 12:19:13,802 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 12:19:13,802 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 12:19:13,803 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 12:19:13,803 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 12:19:13,803 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 12:19:13,803 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 12:19:13,803 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 12:19:13,803 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 12:19:13,803 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 12:19:13,803 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 12:19:13,804 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 12:19:13,804 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 12:19:13,804 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 12:19:13,804 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 12:19:13,804 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 12:19:13,804 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 12:19:13,804 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 12:19:13,807 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 12:19:13,808 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 12:19:13,808 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 12:19:13,808 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 12:19:13,808 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 12:19:13,808 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 12:19:13,808 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 12:19:14,036 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 12:19:14,054 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 12:19:14,057 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 12:19:14,058 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 12:19:14,059 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 12:19:14,060 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.4_2.ufo.UNBOUNDED.pals.c [2023-04-01 12:19:15,277 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 12:19:15,486 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 12:19:15,486 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.4_2.ufo.UNBOUNDED.pals.c [2023-04-01 12:19:15,495 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6cf058866/f7a9e88a7cc2494c859fb41e0e5e173b/FLAG563fdc75d [2023-04-01 12:19:15,507 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6cf058866/f7a9e88a7cc2494c859fb41e0e5e173b [2023-04-01 12:19:15,509 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 12:19:15,510 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 12:19:15,511 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 12:19:15,511 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 12:19:15,514 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 12:19:15,514 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:19:15" (1/1) ... [2023-04-01 12:19:15,515 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1424de49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:19:15, skipping insertion in model container [2023-04-01 12:19:15,515 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:19:15" (1/1) ... [2023-04-01 12:19:15,520 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 12:19:15,554 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 12:19:15,733 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.4_2.ufo.UNBOUNDED.pals.c[14684,14697] [2023-04-01 12:19:15,736 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 12:19:15,746 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 12:19:15,807 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.4_2.ufo.UNBOUNDED.pals.c[14684,14697] [2023-04-01 12:19:15,808 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 12:19:15,823 INFO L208 MainTranslator]: Completed translation [2023-04-01 12:19:15,823 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:19:15 WrapperNode [2023-04-01 12:19:15,823 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 12:19:15,824 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 12:19:15,824 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 12:19:15,824 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 12:19:15,844 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:19:15" (1/1) ... [2023-04-01 12:19:15,844 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:19:15" (1/1) ... [2023-04-01 12:19:15,853 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:19:15" (1/1) ... [2023-04-01 12:19:15,854 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:19:15" (1/1) ... [2023-04-01 12:19:15,868 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:19:15" (1/1) ... [2023-04-01 12:19:15,876 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:19:15" (1/1) ... [2023-04-01 12:19:15,882 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:19:15" (1/1) ... [2023-04-01 12:19:15,885 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:19:15" (1/1) ... [2023-04-01 12:19:15,889 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 12:19:15,890 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 12:19:15,890 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 12:19:15,890 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 12:19:15,891 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:19:15" (1/1) ... [2023-04-01 12:19:15,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 12:19:15,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:19:15,948 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) [2023-04-01 12:19:15,985 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 12:19:15,985 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 12:19:15,985 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 12:19:15,986 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 12:19:15,987 INFO L138 BoogieDeclarations]: Found implementation of procedure write_side1_failed_history [2023-04-01 12:19:15,987 INFO L138 BoogieDeclarations]: Found implementation of procedure read_side1_failed_history [2023-04-01 12:19:15,987 INFO L138 BoogieDeclarations]: Found implementation of procedure write_side2_failed_history [2023-04-01 12:19:15,987 INFO L138 BoogieDeclarations]: Found implementation of procedure read_side2_failed_history [2023-04-01 12:19:15,987 INFO L138 BoogieDeclarations]: Found implementation of procedure write_active_side_history [2023-04-01 12:19:15,987 INFO L138 BoogieDeclarations]: Found implementation of procedure read_active_side_history [2023-04-01 12:19:15,988 INFO L138 BoogieDeclarations]: Found implementation of procedure write_manual_selection_history [2023-04-01 12:19:15,988 INFO L138 BoogieDeclarations]: Found implementation of procedure read_manual_selection_history [2023-04-01 12:19:15,988 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2023-04-01 12:19:15,988 INFO L138 BoogieDeclarations]: Found implementation of procedure flip_the_side [2023-04-01 12:19:15,988 INFO L138 BoogieDeclarations]: Found implementation of procedure Console_task_each_pals_period [2023-04-01 12:19:15,988 INFO L138 BoogieDeclarations]: Found implementation of procedure Side1_activestandby_task_each_pals_period [2023-04-01 12:19:15,989 INFO L138 BoogieDeclarations]: Found implementation of procedure Side2_activestandby_task_each_pals_period [2023-04-01 12:19:15,989 INFO L138 BoogieDeclarations]: Found implementation of procedure Pendulum_prism_task_each_pals_period [2023-04-01 12:19:15,989 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2023-04-01 12:19:15,989 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 12:19:15,989 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2023-04-01 12:19:15,990 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 12:19:15,990 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 12:19:15,990 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 12:19:15,990 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 12:19:15,990 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-01 12:19:15,990 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-01 12:19:15,990 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-01 12:19:15,990 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-01 12:19:15,990 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-01 12:19:15,990 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 12:19:15,991 INFO L130 BoogieDeclarations]: Found specification of procedure write_side1_failed_history [2023-04-01 12:19:15,991 INFO L130 BoogieDeclarations]: Found specification of procedure read_side1_failed_history [2023-04-01 12:19:15,991 INFO L130 BoogieDeclarations]: Found specification of procedure write_side2_failed_history [2023-04-01 12:19:15,991 INFO L130 BoogieDeclarations]: Found specification of procedure read_side2_failed_history [2023-04-01 12:19:15,991 INFO L130 BoogieDeclarations]: Found specification of procedure write_active_side_history [2023-04-01 12:19:15,991 INFO L130 BoogieDeclarations]: Found specification of procedure read_active_side_history [2023-04-01 12:19:15,991 INFO L130 BoogieDeclarations]: Found specification of procedure write_manual_selection_history [2023-04-01 12:19:15,991 INFO L130 BoogieDeclarations]: Found specification of procedure read_manual_selection_history [2023-04-01 12:19:15,991 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-01 12:19:15,991 INFO L130 BoogieDeclarations]: Found specification of procedure flip_the_side [2023-04-01 12:19:15,991 INFO L130 BoogieDeclarations]: Found specification of procedure Console_task_each_pals_period [2023-04-01 12:19:15,992 INFO L130 BoogieDeclarations]: Found specification of procedure Side1_activestandby_task_each_pals_period [2023-04-01 12:19:15,975 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 [2023-04-01 12:19:15,993 INFO L130 BoogieDeclarations]: Found specification of procedure Side2_activestandby_task_each_pals_period [2023-04-01 12:19:15,993 INFO L130 BoogieDeclarations]: Found specification of procedure Pendulum_prism_task_each_pals_period [2023-04-01 12:19:15,994 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-01 12:19:15,994 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 12:19:15,994 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 12:19:15,994 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 12:19:15,995 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 12:19:15,995 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 12:19:15,995 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 12:19:15,995 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 12:19:16,124 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 12:19:16,126 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 12:19:16,680 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 12:19:16,800 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 12:19:16,800 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 12:19:16,804 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:19:16 BoogieIcfgContainer [2023-04-01 12:19:16,805 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 12:19:16,808 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 12:19:16,808 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 12:19:16,811 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 12:19:16,811 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 12:19:15" (1/3) ... [2023-04-01 12:19:16,811 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79d0c097 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:19:16, skipping insertion in model container [2023-04-01 12:19:16,812 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:19:15" (2/3) ... [2023-04-01 12:19:16,812 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79d0c097 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:19:16, skipping insertion in model container [2023-04-01 12:19:16,812 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:19:16" (3/3) ... [2023-04-01 12:19:16,814 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_STARTPALS_ActiveStandby.4_2.ufo.UNBOUNDED.pals.c [2023-04-01 12:19:16,829 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 12:19:16,829 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 12:19:16,889 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 12:19:16,894 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;@684e5b9d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 12:19:16,894 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 12:19:16,897 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) [2023-04-01 12:19:16,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-04-01 12:19:16,903 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:19:16,904 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] [2023-04-01 12:19:16,904 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:19:16,908 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:19:16,908 INFO L85 PathProgramCache]: Analyzing trace with hash 558178186, now seen corresponding path program 1 times [2023-04-01 12:19:16,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:19:16,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972523132] [2023-04-01 12:19:16,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:19:16,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:19:17,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:19:17,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:19:17,543 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:19:17,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972523132] [2023-04-01 12:19:17,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972523132] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:19:17,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:19:17,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 12:19:17,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899646828] [2023-04-01 12:19:17,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:19:17,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 12:19:17,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:19:17,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 12:19:17,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 12:19:17,586 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) [2023-04-01 12:19:17,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:19:17,777 INFO L93 Difference]: Finished difference Result 368 states and 559 transitions. [2023-04-01 12:19:17,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 12:19:17,782 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 [2023-04-01 12:19:17,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:19:17,791 INFO L225 Difference]: With dead ends: 368 [2023-04-01 12:19:17,791 INFO L226 Difference]: Without dead ends: 190 [2023-04-01 12:19:17,796 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 [2023-04-01 12:19:17,799 INFO L413 NwaCegarLoop]: 249 mSDtfsCounter, 5 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:19:17,800 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 737 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:19:17,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2023-04-01 12:19:17,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 190. [2023-04-01 12:19:17,877 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) [2023-04-01 12:19:17,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 269 transitions. [2023-04-01 12:19:17,884 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 269 transitions. Word has length 48 [2023-04-01 12:19:17,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:19:17,885 INFO L495 AbstractCegarLoop]: Abstraction has 190 states and 269 transitions. [2023-04-01 12:19:17,885 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) [2023-04-01 12:19:17,885 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 269 transitions. [2023-04-01 12:19:17,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-04-01 12:19:17,888 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:19:17,888 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] [2023-04-01 12:19:17,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 12:19:17,888 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:19:17,889 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:19:17,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1895037546, now seen corresponding path program 1 times [2023-04-01 12:19:17,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:19:17,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471176805] [2023-04-01 12:19:17,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:19:17,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:19:17,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:19:18,649 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 12:19:18,649 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:19:18,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471176805] [2023-04-01 12:19:18,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471176805] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 12:19:18,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866315673] [2023-04-01 12:19:18,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:19:18,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 12:19:18,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:19:18,657 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) [2023-04-01 12:19:18,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 12:19:18,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:19:18,885 INFO L262 TraceCheckSpWp]: Trace formula consists of 848 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 12:19:18,897 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 12:19:19,078 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:19:19,078 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 12:19:19,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866315673] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:19:19,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 12:19:19,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 15 [2023-04-01 12:19:19,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128263449] [2023-04-01 12:19:19,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:19:19,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 12:19:19,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:19:19,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 12:19:19,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2023-04-01 12:19:19,087 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) [2023-04-01 12:19:19,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:19:19,991 INFO L93 Difference]: Finished difference Result 428 states and 605 transitions. [2023-04-01 12:19:19,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 12:19:19,992 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 [2023-04-01 12:19:19,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:19:19,998 INFO L225 Difference]: With dead ends: 428 [2023-04-01 12:19:19,998 INFO L226 Difference]: Without dead ends: 249 [2023-04-01 12:19:19,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2023-04-01 12:19:20,000 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 506 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1001 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.7s IncrementalHoareTripleChecker+Time [2023-04-01 12:19:20,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [513 Valid, 61 Invalid, 1207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 1001 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-01 12:19:20,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2023-04-01 12:19:20,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 244. [2023-04-01 12:19:20,041 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) [2023-04-01 12:19:20,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 340 transitions. [2023-04-01 12:19:20,047 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 340 transitions. Word has length 66 [2023-04-01 12:19:20,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:19:20,047 INFO L495 AbstractCegarLoop]: Abstraction has 244 states and 340 transitions. [2023-04-01 12:19:20,048 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) [2023-04-01 12:19:20,048 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 340 transitions. [2023-04-01 12:19:20,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-04-01 12:19:20,055 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:19:20,055 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] [2023-04-01 12:19:20,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 12:19:20,261 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 [2023-04-01 12:19:20,261 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:19:20,262 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:19:20,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1927572199, now seen corresponding path program 1 times [2023-04-01 12:19:20,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:19:20,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190808665] [2023-04-01 12:19:20,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:19:20,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:19:20,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:19:20,820 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 12:19:20,821 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:19:20,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190808665] [2023-04-01 12:19:20,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190808665] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 12:19:20,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513705377] [2023-04-01 12:19:20,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:19:20,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 12:19:20,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:19:20,823 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) [2023-04-01 12:19:20,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 12:19:21,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:19:21,024 INFO L262 TraceCheckSpWp]: Trace formula consists of 849 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 12:19:21,033 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 12:19:21,129 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:19:21,129 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 12:19:21,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513705377] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:19:21,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 12:19:21,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 15 [2023-04-01 12:19:21,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830232799] [2023-04-01 12:19:21,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:19:21,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 12:19:21,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:19:21,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 12:19:21,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2023-04-01 12:19:21,131 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) [2023-04-01 12:19:21,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:19:21,919 INFO L93 Difference]: Finished difference Result 430 states and 607 transitions. [2023-04-01 12:19:21,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 12:19:21,919 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 [2023-04-01 12:19:21,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:19:21,922 INFO L225 Difference]: With dead ends: 430 [2023-04-01 12:19:21,922 INFO L226 Difference]: Without dead ends: 248 [2023-04-01 12:19:21,924 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 [2023-04-01 12:19:21,925 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 495 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 999 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.7s IncrementalHoareTripleChecker+Time [2023-04-01 12:19:21,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [501 Valid, 69 Invalid, 1191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 999 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-01 12:19:21,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2023-04-01 12:19:21,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 244. [2023-04-01 12:19:21,949 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) [2023-04-01 12:19:21,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 340 transitions. [2023-04-01 12:19:21,951 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 340 transitions. Word has length 67 [2023-04-01 12:19:21,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:19:21,952 INFO L495 AbstractCegarLoop]: Abstraction has 244 states and 340 transitions. [2023-04-01 12:19:21,952 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) [2023-04-01 12:19:21,952 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 340 transitions. [2023-04-01 12:19:21,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-04-01 12:19:21,953 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:19:21,953 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] [2023-04-01 12:19:21,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 12:19:22,160 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 [2023-04-01 12:19:22,161 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:19:22,162 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:19:22,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1039266438, now seen corresponding path program 1 times [2023-04-01 12:19:22,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:19:22,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616190220] [2023-04-01 12:19:22,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:19:22,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:19:22,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:19:22,727 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 12:19:22,728 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:19:22,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616190220] [2023-04-01 12:19:22,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616190220] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 12:19:22,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26258358] [2023-04-01 12:19:22,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:19:22,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 12:19:22,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:19:22,743 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) [2023-04-01 12:19:22,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 12:19:22,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:19:22,931 INFO L262 TraceCheckSpWp]: Trace formula consists of 848 conjuncts, 13 conjunts are in the unsatisfiable core [2023-04-01 12:19:22,934 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 12:19:23,105 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 12:19:23,106 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 12:19:23,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26258358] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:19:23,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 12:19:23,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2023-04-01 12:19:23,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044153829] [2023-04-01 12:19:23,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:19:23,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 12:19:23,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:19:23,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 12:19:23,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-04-01 12:19:23,108 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) [2023-04-01 12:19:23,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:19:23,449 INFO L93 Difference]: Finished difference Result 661 states and 924 transitions. [2023-04-01 12:19:23,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 12:19:23,449 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 [2023-04-01 12:19:23,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:19:23,454 INFO L225 Difference]: With dead ends: 661 [2023-04-01 12:19:23,454 INFO L226 Difference]: Without dead ends: 441 [2023-04-01 12:19:23,455 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 [2023-04-01 12:19:23,456 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 240 mSDsluCounter, 1198 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2023-04-01 12:19:23,457 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] [2023-04-01 12:19:23,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2023-04-01 12:19:23,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 429. [2023-04-01 12:19:23,513 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) [2023-04-01 12:19:23,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 603 transitions. [2023-04-01 12:19:23,517 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 603 transitions. Word has length 69 [2023-04-01 12:19:23,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:19:23,517 INFO L495 AbstractCegarLoop]: Abstraction has 429 states and 603 transitions. [2023-04-01 12:19:23,517 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) [2023-04-01 12:19:23,517 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 603 transitions. [2023-04-01 12:19:23,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-04-01 12:19:23,520 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:19:23,520 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] [2023-04-01 12:19:23,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 12:19:23,727 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 [2023-04-01 12:19:23,728 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:19:23,728 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:19:23,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1911334742, now seen corresponding path program 1 times [2023-04-01 12:19:23,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:19:23,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886315459] [2023-04-01 12:19:23,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:19:23,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:19:23,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:19:24,322 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 12:19:24,323 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:19:24,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886315459] [2023-04-01 12:19:24,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886315459] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 12:19:24,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431152027] [2023-04-01 12:19:24,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:19:24,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 12:19:24,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:19:24,325 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) [2023-04-01 12:19:24,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 12:19:24,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:19:24,525 INFO L262 TraceCheckSpWp]: Trace formula consists of 865 conjuncts, 20 conjunts are in the unsatisfiable core [2023-04-01 12:19:24,529 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 12:19:25,889 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 12:19:25,889 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 12:19:28,122 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 8191 disjunctions. This might take some time... [2023-04-01 12:19:32,727 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 8191 disjunctions.