/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.4_1.ufo.UNBOUNDED.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-03 01:31:47,469 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-03 01:31:47,471 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-03 01:31:47,506 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-03 01:31:47,506 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-03 01:31:47,509 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-03 01:31:47,511 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-03 01:31:47,513 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-03 01:31:47,516 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-03 01:31:47,521 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-03 01:31:47,522 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-03 01:31:47,524 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-03 01:31:47,524 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-03 01:31:47,527 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-03 01:31:47,528 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-03 01:31:47,529 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-03 01:31:47,529 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-03 01:31:47,530 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-03 01:31:47,532 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-03 01:31:47,536 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-03 01:31:47,537 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-03 01:31:47,538 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-03 01:31:47,539 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-03 01:31:47,540 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-03 01:31:47,547 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-03 01:31:47,547 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-03 01:31:47,548 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-03 01:31:47,549 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-03 01:31:47,549 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-03 01:31:47,550 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-03 01:31:47,550 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-03 01:31:47,550 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-03 01:31:47,552 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-03 01:31:47,552 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-03 01:31:47,553 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-03 01:31:47,553 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-03 01:31:47,553 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-03 01:31:47,554 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-03 01:31:47,554 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-03 01:31:47,554 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-03 01:31:47,555 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-03 01:31:47,556 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 01:31:47,575 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-03 01:31:47,575 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-03 01:31:47,575 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-03 01:31:47,575 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-03 01:31:47,576 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-03 01:31:47,576 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-03 01:31:47,576 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-03 01:31:47,576 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-03 01:31:47,576 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-03 01:31:47,576 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-03 01:31:47,576 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-03 01:31:47,577 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-03 01:31:47,577 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-03 01:31:47,577 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-03 01:31:47,577 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-03 01:31:47,577 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-03 01:31:47,577 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-03 01:31:47,577 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-03 01:31:47,578 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-03 01:31:47,578 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-03 01:31:47,578 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-03 01:31:47,578 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-03 01:31:47,578 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-03 01:31:47,578 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-03 01:31:47,579 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-03 01:31:47,579 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-03 01:31:47,579 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-03 01:31:47,579 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-03 01:31:47,579 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-03 01:31:47,579 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-03 01:31:47,579 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-03 01:31:47,579 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-03 01:31:47,580 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 01:31:47,580 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-03 01:31:47,580 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-03 01:31:47,580 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-03 01:31:47,580 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-03 01:31:47,580 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-03 01:31:47,580 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-03 01:31:47,580 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-03 01:31:47,580 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-03 01:31:47,581 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-03 01:31:47,767 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-03 01:31:47,783 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-03 01:31:47,785 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-03 01:31:47,786 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-03 01:31:47,786 INFO L275 PluginConnector]: CDTParser initialized [2023-04-03 01:31:47,787 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.4_1.ufo.UNBOUNDED.pals.c [2023-04-03 01:31:49,033 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-03 01:31:49,259 INFO L351 CDTParser]: Found 1 translation units. [2023-04-03 01:31:49,260 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.4_1.ufo.UNBOUNDED.pals.c [2023-04-03 01:31:49,267 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b5df311f/42b86999522b4d03a32b4b1ec6a33316/FLAGb1b3a9b77 [2023-04-03 01:31:49,283 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b5df311f/42b86999522b4d03a32b4b1ec6a33316 [2023-04-03 01:31:49,285 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-03 01:31:49,286 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-03 01:31:49,290 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-03 01:31:49,290 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-03 01:31:49,293 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-03 01:31:49,295 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 01:31:49" (1/1) ... [2023-04-03 01:31:49,296 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33bcfcb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:31:49, skipping insertion in model container [2023-04-03 01:31:49,296 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 01:31:49" (1/1) ... [2023-04-03 01:31:49,303 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-03 01:31:49,348 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-03 01:31:49,541 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_1.ufo.UNBOUNDED.pals.c[14522,14535] [2023-04-03 01:31:49,545 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 01:31:49,557 INFO L203 MainTranslator]: Completed pre-run [2023-04-03 01:31:49,608 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_1.ufo.UNBOUNDED.pals.c[14522,14535] [2023-04-03 01:31:49,609 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 01:31:49,624 INFO L208 MainTranslator]: Completed translation [2023-04-03 01:31:49,625 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:31:49 WrapperNode [2023-04-03 01:31:49,625 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-03 01:31:49,626 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-03 01:31:49,626 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-03 01:31:49,626 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-03 01:31:49,637 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:31:49" (1/1) ... [2023-04-03 01:31:49,637 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:31:49" (1/1) ... [2023-04-03 01:31:49,658 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:31:49" (1/1) ... [2023-04-03 01:31:49,658 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:31:49" (1/1) ... [2023-04-03 01:31:49,673 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:31:49" (1/1) ... [2023-04-03 01:31:49,681 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:31:49" (1/1) ... [2023-04-03 01:31:49,684 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:31:49" (1/1) ... [2023-04-03 01:31:49,686 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:31:49" (1/1) ... [2023-04-03 01:31:49,691 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-03 01:31:49,692 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-03 01:31:49,692 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-03 01:31:49,692 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-03 01:31:49,693 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:31:49" (1/1) ... [2023-04-03 01:31:49,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 01:31:49,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:31:49,744 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 01:31:49,774 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 01:31:49,794 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-03 01:31:49,794 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-03 01:31:49,794 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-03 01:31:49,795 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-03 01:31:49,795 INFO L138 BoogieDeclarations]: Found implementation of procedure write_side1_failed_history [2023-04-03 01:31:49,795 INFO L138 BoogieDeclarations]: Found implementation of procedure read_side1_failed_history [2023-04-03 01:31:49,796 INFO L138 BoogieDeclarations]: Found implementation of procedure write_side2_failed_history [2023-04-03 01:31:49,796 INFO L138 BoogieDeclarations]: Found implementation of procedure read_side2_failed_history [2023-04-03 01:31:49,796 INFO L138 BoogieDeclarations]: Found implementation of procedure write_active_side_history [2023-04-03 01:31:49,796 INFO L138 BoogieDeclarations]: Found implementation of procedure read_active_side_history [2023-04-03 01:31:49,796 INFO L138 BoogieDeclarations]: Found implementation of procedure write_manual_selection_history [2023-04-03 01:31:49,796 INFO L138 BoogieDeclarations]: Found implementation of procedure read_manual_selection_history [2023-04-03 01:31:49,796 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2023-04-03 01:31:49,796 INFO L138 BoogieDeclarations]: Found implementation of procedure flip_the_side [2023-04-03 01:31:49,796 INFO L138 BoogieDeclarations]: Found implementation of procedure Console_task_each_pals_period [2023-04-03 01:31:49,796 INFO L138 BoogieDeclarations]: Found implementation of procedure Side1_activestandby_task_each_pals_period [2023-04-03 01:31:49,797 INFO L138 BoogieDeclarations]: Found implementation of procedure Side2_activestandby_task_each_pals_period [2023-04-03 01:31:49,797 INFO L138 BoogieDeclarations]: Found implementation of procedure Pendulum_prism_task_each_pals_period [2023-04-03 01:31:49,797 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2023-04-03 01:31:49,797 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-03 01:31:49,797 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2023-04-03 01:31:49,797 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-03 01:31:49,797 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-03 01:31:49,797 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-03 01:31:49,797 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-03 01:31:49,797 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-03 01:31:49,798 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-03 01:31:49,798 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-03 01:31:49,798 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-03 01:31:49,798 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-03 01:31:49,798 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-03 01:31:49,798 INFO L130 BoogieDeclarations]: Found specification of procedure write_side1_failed_history [2023-04-03 01:31:49,798 INFO L130 BoogieDeclarations]: Found specification of procedure read_side1_failed_history [2023-04-03 01:31:49,798 INFO L130 BoogieDeclarations]: Found specification of procedure write_side2_failed_history [2023-04-03 01:31:49,798 INFO L130 BoogieDeclarations]: Found specification of procedure read_side2_failed_history [2023-04-03 01:31:49,798 INFO L130 BoogieDeclarations]: Found specification of procedure write_active_side_history [2023-04-03 01:31:49,798 INFO L130 BoogieDeclarations]: Found specification of procedure read_active_side_history [2023-04-03 01:31:49,799 INFO L130 BoogieDeclarations]: Found specification of procedure write_manual_selection_history [2023-04-03 01:31:49,799 INFO L130 BoogieDeclarations]: Found specification of procedure read_manual_selection_history [2023-04-03 01:31:49,799 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-03 01:31:49,799 INFO L130 BoogieDeclarations]: Found specification of procedure flip_the_side [2023-04-03 01:31:49,799 INFO L130 BoogieDeclarations]: Found specification of procedure Console_task_each_pals_period [2023-04-03 01:31:49,799 INFO L130 BoogieDeclarations]: Found specification of procedure Side1_activestandby_task_each_pals_period [2023-04-03 01:31:49,800 INFO L130 BoogieDeclarations]: Found specification of procedure Side2_activestandby_task_each_pals_period [2023-04-03 01:31:49,800 INFO L130 BoogieDeclarations]: Found specification of procedure Pendulum_prism_task_each_pals_period [2023-04-03 01:31:49,800 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-03 01:31:49,801 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-03 01:31:49,801 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-03 01:31:49,801 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-03 01:31:49,801 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-03 01:31:49,801 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-03 01:31:49,801 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-03 01:31:49,801 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-03 01:31:49,928 INFO L236 CfgBuilder]: Building ICFG [2023-04-03 01:31:49,932 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-03 01:31:50,494 INFO L277 CfgBuilder]: Performing block encoding [2023-04-03 01:31:50,628 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-03 01:31:50,629 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-03 01:31:50,632 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 01:31:50 BoogieIcfgContainer [2023-04-03 01:31:50,632 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-03 01:31:50,636 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-03 01:31:50,636 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-03 01:31:50,639 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-03 01:31:50,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.04 01:31:49" (1/3) ... [2023-04-03 01:31:50,640 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29d41232 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 01:31:50, skipping insertion in model container [2023-04-03 01:31:50,640 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:31:49" (2/3) ... [2023-04-03 01:31:50,640 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29d41232 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 01:31:50, skipping insertion in model container [2023-04-03 01:31:50,640 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 01:31:50" (3/3) ... [2023-04-03 01:31:50,641 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_STARTPALS_ActiveStandby.4_1.ufo.UNBOUNDED.pals.c [2023-04-03 01:31:50,657 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-03 01:31:50,657 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-03 01:31:50,721 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-03 01:31:50,727 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;@610e9f73, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-03 01:31:50,728 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-03 01:31:50,731 INFO L276 IsEmpty]: Start isEmpty. Operand has 184 states, 120 states have (on average 1.4583333333333333) internal successors, (175), 122 states have internal predecessors, (175), 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 01:31:50,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-04-03 01:31:50,738 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:31:50,738 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 01:31:50,739 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:31:50,742 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:31:50,742 INFO L85 PathProgramCache]: Analyzing trace with hash -2759768, now seen corresponding path program 1 times [2023-04-03 01:31:50,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:31:50,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537623006] [2023-04-03 01:31:50,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:31:50,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:31:51,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:31:51,368 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 01:31:51,368 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:31:51,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537623006] [2023-04-03 01:31:51,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537623006] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:31:51,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:31:51,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-03 01:31:51,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97384761] [2023-04-03 01:31:51,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:31:51,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-03 01:31:51,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:31:51,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-03 01:31:51,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-03 01:31:51,406 INFO L87 Difference]: Start difference. First operand has 184 states, 120 states have (on average 1.4583333333333333) internal successors, (175), 122 states have internal predecessors, (175), 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 01:31:51,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:31:51,576 INFO L93 Difference]: Finished difference Result 358 states and 541 transitions. [2023-04-03 01:31:51,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-03 01:31:51,579 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 01:31:51,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:31:51,587 INFO L225 Difference]: With dead ends: 358 [2023-04-03 01:31:51,587 INFO L226 Difference]: Without dead ends: 185 [2023-04-03 01:31:51,591 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 01:31:51,593 INFO L413 NwaCegarLoop]: 240 mSDtfsCounter, 5 mSDsluCounter, 470 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 710 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 [2023-04-03 01:31:51,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 710 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 01:31:51,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2023-04-03 01:31:51,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2023-04-03 01:31:51,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 122 states have (on average 1.4344262295081966) internal successors, (175), 123 states have internal predecessors, (175), 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 01:31:51,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 260 transitions. [2023-04-03 01:31:51,640 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 260 transitions. Word has length 48 [2023-04-03 01:31:51,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:31:51,640 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 260 transitions. [2023-04-03 01:31:51,641 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 01:31:51,641 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 260 transitions. [2023-04-03 01:31:51,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-04-03 01:31:51,643 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:31:51,643 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] [2023-04-03 01:31:51,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-03 01:31:51,644 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:31:51,644 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:31:51,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1731884327, now seen corresponding path program 1 times [2023-04-03 01:31:51,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:31:51,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417899715] [2023-04-03 01:31:51,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:31:51,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:31:51,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:31:52,497 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 01:31:52,498 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:31:52,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417899715] [2023-04-03 01:31:52,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417899715] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:31:52,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768215253] [2023-04-03 01:31:52,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:31:52,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:31:52,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:31:52,503 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 01:31:52,525 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 01:31:52,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:31:52,736 INFO L262 TraceCheckSpWp]: Trace formula consists of 843 conjuncts, 13 conjunts are in the unsatisfiable core [2023-04-03 01:31:52,747 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:31:53,003 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 01:31:53,004 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 01:31:53,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768215253] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:31:53,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 01:31:53,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2023-04-03 01:31:53,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153079793] [2023-04-03 01:31:53,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:31:53,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-03 01:31:53,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:31:53,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-03 01:31:53,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-04-03 01:31:53,014 INFO L87 Difference]: Start difference. First operand 185 states and 260 transitions. Second operand has 8 states, 6 states have (on average 5.833333333333333) internal successors, (35), 8 states have internal predecessors, (35), 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 01:31:53,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:31:53,331 INFO L93 Difference]: Finished difference Result 541 states and 759 transitions. [2023-04-03 01:31:53,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-03 01:31:53,333 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 5.833333333333333) internal successors, (35), 8 states have internal predecessors, (35), 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 65 [2023-04-03 01:31:53,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:31:53,344 INFO L225 Difference]: With dead ends: 541 [2023-04-03 01:31:53,344 INFO L226 Difference]: Without dead ends: 346 [2023-04-03 01:31:53,349 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2023-04-03 01:31:53,351 INFO L413 NwaCegarLoop]: 250 mSDtfsCounter, 221 mSDsluCounter, 884 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 1134 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 01:31:53,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 1134 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 01:31:53,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2023-04-03 01:31:53,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 334. [2023-04-03 01:31:53,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 223 states have (on average 1.4394618834080717) internal successors, (321), 225 states have internal predecessors, (321), 77 states have call successors, (77), 33 states have call predecessors, (77), 33 states have return successors, (77), 76 states have call predecessors, (77), 76 states have call successors, (77) [2023-04-03 01:31:53,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 475 transitions. [2023-04-03 01:31:53,410 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 475 transitions. Word has length 65 [2023-04-03 01:31:53,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:31:53,411 INFO L495 AbstractCegarLoop]: Abstraction has 334 states and 475 transitions. [2023-04-03 01:31:53,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 5.833333333333333) internal successors, (35), 8 states have internal predecessors, (35), 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 01:31:53,411 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 475 transitions. [2023-04-03 01:31:53,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-04-03 01:31:53,419 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:31:53,419 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 01:31:53,430 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-03 01:31:53,630 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 01:31:53,631 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:31:53,631 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:31:53,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1865749501, now seen corresponding path program 1 times [2023-04-03 01:31:53,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:31:53,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130625499] [2023-04-03 01:31:53,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:31:53,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:31:53,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:31:54,292 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 01:31:54,294 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:31:54,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130625499] [2023-04-03 01:31:54,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130625499] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:31:54,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367117025] [2023-04-03 01:31:54,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:31:54,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:31:54,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:31:54,301 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 01:31:54,328 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 01:31:54,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:31:54,508 INFO L262 TraceCheckSpWp]: Trace formula consists of 860 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-03 01:31:54,512 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:31:54,550 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-03 01:31:54,550 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 01:31:54,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367117025] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:31:54,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 01:31:54,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 9 [2023-04-03 01:31:54,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116633198] [2023-04-03 01:31:54,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:31:54,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-03 01:31:54,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:31:54,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-03 01:31:54,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-04-03 01:31:54,585 INFO L87 Difference]: Start difference. First operand 334 states and 475 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-04-03 01:31:54,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:31:54,654 INFO L93 Difference]: Finished difference Result 667 states and 954 transitions. [2023-04-03 01:31:54,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-03 01:31:54,655 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) Word has length 67 [2023-04-03 01:31:54,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:31:54,661 INFO L225 Difference]: With dead ends: 667 [2023-04-03 01:31:54,661 INFO L226 Difference]: Without dead ends: 344 [2023-04-03 01:31:54,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-04-03 01:31:54,664 INFO L413 NwaCegarLoop]: 242 mSDtfsCounter, 6 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 722 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 01:31:54,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 722 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 01:31:54,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2023-04-03 01:31:54,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 344. [2023-04-03 01:31:54,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 231 states have (on average 1.4242424242424243) internal successors, (329), 233 states have internal predecessors, (329), 77 states have call successors, (77), 35 states have call predecessors, (77), 35 states have return successors, (77), 76 states have call predecessors, (77), 76 states have call successors, (77) [2023-04-03 01:31:54,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 483 transitions. [2023-04-03 01:31:54,697 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 483 transitions. Word has length 67 [2023-04-03 01:31:54,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:31:54,698 INFO L495 AbstractCegarLoop]: Abstraction has 344 states and 483 transitions. [2023-04-03 01:31:54,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-04-03 01:31:54,698 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 483 transitions. [2023-04-03 01:31:54,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-04-03 01:31:54,701 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:31:54,701 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, 1, 1, 1, 1] [2023-04-03 01:31:54,712 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 01:31:54,909 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 01:31:54,909 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:31:54,910 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:31:54,910 INFO L85 PathProgramCache]: Analyzing trace with hash 497662041, now seen corresponding path program 1 times [2023-04-03 01:31:54,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:31:54,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686471319] [2023-04-03 01:31:54,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:31:54,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:31:54,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:31:55,669 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 01:31:55,670 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:31:55,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686471319] [2023-04-03 01:31:55,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686471319] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:31:55,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897177180] [2023-04-03 01:31:55,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:31:55,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:31:55,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:31:55,683 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 01:31:55,686 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 01:31:55,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:31:55,885 INFO L262 TraceCheckSpWp]: Trace formula consists of 880 conjuncts, 11 conjunts are in the unsatisfiable core [2023-04-03 01:31:55,892 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:31:55,959 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-03 01:31:55,960 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 01:31:55,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897177180] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:31:55,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 01:31:55,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 11 [2023-04-03 01:31:55,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410849930] [2023-04-03 01:31:55,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:31:55,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-03 01:31:55,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:31:55,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-03 01:31:55,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2023-04-03 01:31:55,962 INFO L87 Difference]: Start difference. First operand 344 states and 483 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 states have internal predecessors, (42), 2 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2023-04-03 01:31:56,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:31:56,085 INFO L93 Difference]: Finished difference Result 691 states and 980 transitions. [2023-04-03 01:31:56,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-03 01:31:56,086 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 states have internal predecessors, (42), 2 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) Word has length 75 [2023-04-03 01:31:56,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:31:56,088 INFO L225 Difference]: With dead ends: 691 [2023-04-03 01:31:56,088 INFO L226 Difference]: Without dead ends: 354 [2023-04-03 01:31:56,090 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2023-04-03 01:31:56,091 INFO L413 NwaCegarLoop]: 230 mSDtfsCounter, 17 mSDsluCounter, 903 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 1133 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 01:31:56,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 1133 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 01:31:56,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2023-04-03 01:31:56,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 354. [2023-04-03 01:31:56,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 239 states have (on average 1.401673640167364) internal successors, (335), 241 states have internal predecessors, (335), 77 states have call successors, (77), 37 states have call predecessors, (77), 37 states have return successors, (77), 76 states have call predecessors, (77), 76 states have call successors, (77) [2023-04-03 01:31:56,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 489 transitions. [2023-04-03 01:31:56,108 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 489 transitions. Word has length 75 [2023-04-03 01:31:56,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:31:56,108 INFO L495 AbstractCegarLoop]: Abstraction has 354 states and 489 transitions. [2023-04-03 01:31:56,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 states have internal predecessors, (42), 2 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2023-04-03 01:31:56,109 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 489 transitions. [2023-04-03 01:31:56,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-04-03 01:31:56,110 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:31:56,110 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:31:56,119 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 01:31:56,317 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 01:31:56,317 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:31:56,318 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:31:56,318 INFO L85 PathProgramCache]: Analyzing trace with hash -981157405, now seen corresponding path program 1 times [2023-04-03 01:31:56,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:31:56,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015143240] [2023-04-03 01:31:56,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:31:56,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:31:56,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:31:56,484 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-03 01:31:56,484 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:31:56,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015143240] [2023-04-03 01:31:56,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015143240] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:31:56,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:31:56,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-03 01:31:56,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443713762] [2023-04-03 01:31:56,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:31:56,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-03 01:31:56,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:31:56,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-03 01:31:56,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-03 01:31:56,486 INFO L87 Difference]: Start difference. First operand 354 states and 489 transitions. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-04-03 01:31:56,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:31:56,547 INFO L93 Difference]: Finished difference Result 705 states and 980 transitions. [2023-04-03 01:31:56,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-03 01:31:56,547 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) Word has length 83 [2023-04-03 01:31:56,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:31:56,550 INFO L225 Difference]: With dead ends: 705 [2023-04-03 01:31:56,551 INFO L226 Difference]: Without dead ends: 362 [2023-04-03 01:31:56,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 01:31:56,553 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 5 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 717 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 01:31:56,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 717 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 01:31:56,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2023-04-03 01:31:56,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 362. [2023-04-03 01:31:56,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 245 states have (on average 1.3918367346938776) internal successors, (341), 247 states have internal predecessors, (341), 77 states have call successors, (77), 39 states have call predecessors, (77), 39 states have return successors, (77), 76 states have call predecessors, (77), 76 states have call successors, (77) [2023-04-03 01:31:56,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 495 transitions. [2023-04-03 01:31:56,572 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 495 transitions. Word has length 83 [2023-04-03 01:31:56,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:31:56,572 INFO L495 AbstractCegarLoop]: Abstraction has 362 states and 495 transitions. [2023-04-03 01:31:56,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-04-03 01:31:56,573 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 495 transitions. [2023-04-03 01:31:56,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-04-03 01:31:56,574 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:31:56,574 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:31:56,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-03 01:31:56,574 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:31:56,574 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:31:56,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1018988673, now seen corresponding path program 1 times [2023-04-03 01:31:56,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:31:56,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927624460] [2023-04-03 01:31:56,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:31:56,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:31:56,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:31:57,226 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 01:31:57,226 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:31:57,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927624460] [2023-04-03 01:31:57,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927624460] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:31:57,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473092773] [2023-04-03 01:31:57,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:31:57,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:31:57,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:31:57,229 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 01:31:57,231 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 01:31:57,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:31:57,446 INFO L262 TraceCheckSpWp]: Trace formula consists of 896 conjuncts, 11 conjunts are in the unsatisfiable core [2023-04-03 01:31:57,449 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:31:57,503 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-03 01:31:57,504 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 01:31:57,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473092773] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:31:57,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 01:31:57,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 11 [2023-04-03 01:31:57,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844305948] [2023-04-03 01:31:57,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:31:57,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-03 01:31:57,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:31:57,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-03 01:31:57,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2023-04-03 01:31:57,506 INFO L87 Difference]: Start difference. First operand 362 states and 495 transitions. Second operand has 6 states, 6 states have (on average 8.0) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-04-03 01:31:57,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:31:57,636 INFO L93 Difference]: Finished difference Result 723 states and 1000 transitions. [2023-04-03 01:31:57,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-03 01:31:57,637 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) Word has length 83 [2023-04-03 01:31:57,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:31:57,639 INFO L225 Difference]: With dead ends: 723 [2023-04-03 01:31:57,640 INFO L226 Difference]: Without dead ends: 372 [2023-04-03 01:31:57,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2023-04-03 01:31:57,642 INFO L413 NwaCegarLoop]: 230 mSDtfsCounter, 16 mSDsluCounter, 903 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 1133 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 01:31:57,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 1133 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 01:31:57,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2023-04-03 01:31:57,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 372. [2023-04-03 01:31:57,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 253 states have (on average 1.3794466403162056) internal successors, (349), 255 states have internal predecessors, (349), 77 states have call successors, (77), 41 states have call predecessors, (77), 41 states have return successors, (77), 76 states have call predecessors, (77), 76 states have call successors, (77) [2023-04-03 01:31:57,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 503 transitions. [2023-04-03 01:31:57,659 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 503 transitions. Word has length 83 [2023-04-03 01:31:57,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:31:57,660 INFO L495 AbstractCegarLoop]: Abstraction has 372 states and 503 transitions. [2023-04-03 01:31:57,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-04-03 01:31:57,660 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 503 transitions. [2023-04-03 01:31:57,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-04-03 01:31:57,661 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:31:57,661 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:31:57,674 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-03 01:31:57,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:31:57,870 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:31:57,870 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:31:57,870 INFO L85 PathProgramCache]: Analyzing trace with hash 893908355, now seen corresponding path program 1 times [2023-04-03 01:31:57,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:31:57,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678927803] [2023-04-03 01:31:57,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:31:57,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:31:57,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:31:58,102 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-03 01:31:58,103 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:31:58,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678927803] [2023-04-03 01:31:58,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678927803] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:31:58,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:31:58,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-03 01:31:58,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947121983] [2023-04-03 01:31:58,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:31:58,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-03 01:31:58,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:31:58,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-03 01:31:58,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-03 01:31:58,105 INFO L87 Difference]: Start difference. First operand 372 states and 503 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 3 states have internal predecessors, (50), 2 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-04-03 01:31:58,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:31:58,157 INFO L93 Difference]: Finished difference Result 745 states and 1014 transitions. [2023-04-03 01:31:58,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-03 01:31:58,158 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 3 states have internal predecessors, (50), 2 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) Word has length 91 [2023-04-03 01:31:58,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:31:58,160 INFO L225 Difference]: With dead ends: 745 [2023-04-03 01:31:58,160 INFO L226 Difference]: Without dead ends: 384 [2023-04-03 01:31:58,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 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 01:31:58,162 INFO L413 NwaCegarLoop]: 243 mSDtfsCounter, 7 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 719 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 01:31:58,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 719 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 01:31:58,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2023-04-03 01:31:58,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 384. [2023-04-03 01:31:58,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 263 states have (on average 1.3650190114068441) internal successors, (359), 265 states have internal predecessors, (359), 77 states have call successors, (77), 43 states have call predecessors, (77), 43 states have return successors, (77), 76 states have call predecessors, (77), 76 states have call successors, (77) [2023-04-03 01:31:58,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 513 transitions. [2023-04-03 01:31:58,177 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 513 transitions. Word has length 91 [2023-04-03 01:31:58,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:31:58,178 INFO L495 AbstractCegarLoop]: Abstraction has 384 states and 513 transitions. [2023-04-03 01:31:58,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 3 states have internal predecessors, (50), 2 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-04-03 01:31:58,178 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 513 transitions. [2023-04-03 01:31:58,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-04-03 01:31:58,181 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:31:58,181 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:31:58,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-03 01:31:58,182 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:31:58,182 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:31:58,182 INFO L85 PathProgramCache]: Analyzing trace with hash 658754535, now seen corresponding path program 1 times [2023-04-03 01:31:58,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:31:58,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77888365] [2023-04-03 01:31:58,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:31:58,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:31:58,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:31:58,685 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-03 01:31:58,685 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:31:58,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77888365] [2023-04-03 01:31:58,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77888365] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:31:58,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286649566] [2023-04-03 01:31:58,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:31:58,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:31:58,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:31:58,687 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 01:31:58,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-03 01:31:58,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:31:58,894 INFO L262 TraceCheckSpWp]: Trace formula consists of 932 conjuncts, 27 conjunts are in the unsatisfiable core [2023-04-03 01:31:58,899 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:32:00,287 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 01:32:00,287 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-03 01:32:02,553 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 8191 disjunctions. This might take some time... [2023-04-03 01:32:06,014 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 8191 disjunctions.