/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.BOUNDED-10.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-03 01:31:40,355 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-03 01:31:40,356 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-03 01:31:40,390 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-03 01:31:40,391 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-03 01:31:40,393 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-03 01:31:40,397 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-03 01:31:40,399 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-03 01:31:40,400 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-03 01:31:40,404 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-03 01:31:40,405 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-03 01:31:40,405 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-03 01:31:40,405 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-03 01:31:40,406 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-03 01:31:40,406 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-03 01:31:40,407 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-03 01:31:40,407 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-03 01:31:40,408 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-03 01:31:40,409 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-03 01:31:40,410 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-03 01:31:40,410 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-03 01:31:40,413 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-03 01:31:40,414 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-03 01:31:40,415 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-03 01:31:40,424 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-03 01:31:40,425 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-03 01:31:40,425 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-03 01:31:40,426 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-03 01:31:40,426 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-03 01:31:40,427 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-03 01:31:40,427 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-03 01:31:40,427 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-03 01:31:40,428 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-03 01:31:40,429 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-03 01:31:40,429 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-03 01:31:40,429 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-03 01:31:40,430 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-03 01:31:40,430 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-03 01:31:40,430 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-03 01:31:40,430 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-03 01:31:40,431 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-03 01:31:40,432 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 01:31:40,457 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-03 01:31:40,457 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-03 01:31:40,457 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-03 01:31:40,457 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-03 01:31:40,458 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-03 01:31:40,458 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-03 01:31:40,458 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-03 01:31:40,458 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-03 01:31:40,458 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-03 01:31:40,459 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-03 01:31:40,459 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-03 01:31:40,459 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-03 01:31:40,459 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-03 01:31:40,459 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-03 01:31:40,460 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-03 01:31:40,460 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-03 01:31:40,460 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-03 01:31:40,460 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-03 01:31:40,460 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-03 01:31:40,460 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-03 01:31:40,460 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-03 01:31:40,460 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-03 01:31:40,461 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-03 01:31:40,461 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-03 01:31:40,461 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-03 01:31:40,461 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-03 01:31:40,461 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-03 01:31:40,461 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-03 01:31:40,461 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-03 01:31:40,461 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-03 01:31:40,461 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-03 01:31:40,462 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-03 01:31:40,462 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 01:31:40,462 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-03 01:31:40,462 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-03 01:31:40,462 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-03 01:31:40,462 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-03 01:31:40,462 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-03 01:31:40,462 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-03 01:31:40,462 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-03 01:31:40,462 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-03 01:31:40,463 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-03 01:31:40,660 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-03 01:31:40,692 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-03 01:31:40,694 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-03 01:31:40,695 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-03 01:31:40,695 INFO L275 PluginConnector]: CDTParser initialized [2023-04-03 01:31:40,696 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.4_1.ufo.BOUNDED-10.pals.c [2023-04-03 01:31:41,830 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-03 01:31:42,052 INFO L351 CDTParser]: Found 1 translation units. [2023-04-03 01:31:42,053 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.4_1.ufo.BOUNDED-10.pals.c [2023-04-03 01:31:42,059 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fadbdbb63/f5218f47aa3d44ccb917f8ced64c4e16/FLAG3bc52879a [2023-04-03 01:31:42,069 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fadbdbb63/f5218f47aa3d44ccb917f8ced64c4e16 [2023-04-03 01:31:42,071 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-03 01:31:42,072 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-03 01:31:42,073 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-03 01:31:42,073 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-03 01:31:42,075 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-03 01:31:42,076 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 01:31:42" (1/1) ... [2023-04-03 01:31:42,076 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@637d3cda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:31:42, skipping insertion in model container [2023-04-03 01:31:42,076 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 01:31:42" (1/1) ... [2023-04-03 01:31:42,081 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-03 01:31:42,100 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-03 01:31:42,394 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.BOUNDED-10.pals.c[14540,14553] [2023-04-03 01:31:42,397 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 01:31:42,404 INFO L203 MainTranslator]: Completed pre-run [2023-04-03 01:31:42,474 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.BOUNDED-10.pals.c[14540,14553] [2023-04-03 01:31:42,475 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 01:31:42,493 INFO L208 MainTranslator]: Completed translation [2023-04-03 01:31:42,493 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:31:42 WrapperNode [2023-04-03 01:31:42,494 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-03 01:31:42,494 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-03 01:31:42,495 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-03 01:31:42,495 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-03 01:31:42,502 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:31:42" (1/1) ... [2023-04-03 01:31:42,503 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:31:42" (1/1) ... [2023-04-03 01:31:42,514 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:31:42" (1/1) ... [2023-04-03 01:31:42,515 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:31:42" (1/1) ... [2023-04-03 01:31:42,528 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:31:42" (1/1) ... [2023-04-03 01:31:42,534 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:31:42" (1/1) ... [2023-04-03 01:31:42,537 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:31:42" (1/1) ... [2023-04-03 01:31:42,538 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:31:42" (1/1) ... [2023-04-03 01:31:42,542 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-03 01:31:42,542 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-03 01:31:42,543 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-03 01:31:42,543 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-03 01:31:42,543 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:31:42" (1/1) ... [2023-04-03 01:31:42,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 01:31:42,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:31:42,567 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 01:31:42,578 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 01:31:42,598 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-03 01:31:42,599 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-03 01:31:42,599 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-03 01:31:42,599 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-03 01:31:42,599 INFO L138 BoogieDeclarations]: Found implementation of procedure write_side1_failed_history [2023-04-03 01:31:42,599 INFO L138 BoogieDeclarations]: Found implementation of procedure read_side1_failed_history [2023-04-03 01:31:42,599 INFO L138 BoogieDeclarations]: Found implementation of procedure write_side2_failed_history [2023-04-03 01:31:42,599 INFO L138 BoogieDeclarations]: Found implementation of procedure read_side2_failed_history [2023-04-03 01:31:42,599 INFO L138 BoogieDeclarations]: Found implementation of procedure write_active_side_history [2023-04-03 01:31:42,599 INFO L138 BoogieDeclarations]: Found implementation of procedure read_active_side_history [2023-04-03 01:31:42,600 INFO L138 BoogieDeclarations]: Found implementation of procedure write_manual_selection_history [2023-04-03 01:31:42,600 INFO L138 BoogieDeclarations]: Found implementation of procedure read_manual_selection_history [2023-04-03 01:31:42,600 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2023-04-03 01:31:42,600 INFO L138 BoogieDeclarations]: Found implementation of procedure flip_the_side [2023-04-03 01:31:42,600 INFO L138 BoogieDeclarations]: Found implementation of procedure Console_task_each_pals_period [2023-04-03 01:31:42,600 INFO L138 BoogieDeclarations]: Found implementation of procedure Side1_activestandby_task_each_pals_period [2023-04-03 01:31:42,600 INFO L138 BoogieDeclarations]: Found implementation of procedure Side2_activestandby_task_each_pals_period [2023-04-03 01:31:42,600 INFO L138 BoogieDeclarations]: Found implementation of procedure Pendulum_prism_task_each_pals_period [2023-04-03 01:31:42,600 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2023-04-03 01:31:42,600 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-03 01:31:42,601 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2023-04-03 01:31:42,601 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-03 01:31:42,601 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-03 01:31:42,601 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-03 01:31:42,601 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-03 01:31:42,601 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-03 01:31:42,601 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-03 01:31:42,601 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-03 01:31:42,601 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-03 01:31:42,601 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-03 01:31:42,601 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-03 01:31:42,602 INFO L130 BoogieDeclarations]: Found specification of procedure write_side1_failed_history [2023-04-03 01:31:42,602 INFO L130 BoogieDeclarations]: Found specification of procedure read_side1_failed_history [2023-04-03 01:31:42,602 INFO L130 BoogieDeclarations]: Found specification of procedure write_side2_failed_history [2023-04-03 01:31:42,602 INFO L130 BoogieDeclarations]: Found specification of procedure read_side2_failed_history [2023-04-03 01:31:42,602 INFO L130 BoogieDeclarations]: Found specification of procedure write_active_side_history [2023-04-03 01:31:42,602 INFO L130 BoogieDeclarations]: Found specification of procedure read_active_side_history [2023-04-03 01:31:42,602 INFO L130 BoogieDeclarations]: Found specification of procedure write_manual_selection_history [2023-04-03 01:31:42,602 INFO L130 BoogieDeclarations]: Found specification of procedure read_manual_selection_history [2023-04-03 01:31:42,602 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-03 01:31:42,602 INFO L130 BoogieDeclarations]: Found specification of procedure flip_the_side [2023-04-03 01:31:42,603 INFO L130 BoogieDeclarations]: Found specification of procedure Console_task_each_pals_period [2023-04-03 01:31:42,603 INFO L130 BoogieDeclarations]: Found specification of procedure Side1_activestandby_task_each_pals_period [2023-04-03 01:31:42,603 INFO L130 BoogieDeclarations]: Found specification of procedure Side2_activestandby_task_each_pals_period [2023-04-03 01:31:42,603 INFO L130 BoogieDeclarations]: Found specification of procedure Pendulum_prism_task_each_pals_period [2023-04-03 01:31:42,603 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-03 01:31:42,603 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-03 01:31:42,603 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-03 01:31:42,603 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-03 01:31:42,603 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-03 01:31:42,603 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-03 01:31:42,603 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-03 01:31:42,604 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-03 01:31:42,684 INFO L236 CfgBuilder]: Building ICFG [2023-04-03 01:31:42,686 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-03 01:31:43,090 INFO L277 CfgBuilder]: Performing block encoding [2023-04-03 01:31:43,170 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-03 01:31:43,170 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-03 01:31:43,172 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 01:31:43 BoogieIcfgContainer [2023-04-03 01:31:43,173 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-03 01:31:43,174 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-03 01:31:43,174 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-03 01:31:43,176 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-03 01:31:43,176 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.04 01:31:42" (1/3) ... [2023-04-03 01:31:43,177 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d77ec6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 01:31:43, skipping insertion in model container [2023-04-03 01:31:43,177 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:31:42" (2/3) ... [2023-04-03 01:31:43,177 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d77ec6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 01:31:43, skipping insertion in model container [2023-04-03 01:31:43,177 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 01:31:43" (3/3) ... [2023-04-03 01:31:43,178 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_STARTPALS_ActiveStandby.4_1.ufo.BOUNDED-10.pals.c [2023-04-03 01:31:43,190 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-03 01:31:43,190 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-03 01:31:43,224 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-03 01:31:43,228 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;@76cf4200, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-03 01:31:43,229 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-03 01:31:43,232 INFO L276 IsEmpty]: Start isEmpty. Operand has 185 states, 121 states have (on average 1.4545454545454546) internal successors, (176), 122 states have internal predecessors, (176), 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 01:31:43,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-04-03 01:31:43,238 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:31:43,238 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 01:31:43,239 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:31:43,242 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:31:43,242 INFO L85 PathProgramCache]: Analyzing trace with hash -888344309, now seen corresponding path program 1 times [2023-04-03 01:31:43,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:31:43,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448809717] [2023-04-03 01:31:43,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:31:43,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:31:43,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:31:43,692 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 01:31:43,692 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:31:43,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448809717] [2023-04-03 01:31:43,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448809717] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:31:43,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:31:43,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-03 01:31:43,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630316083] [2023-04-03 01:31:43,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:31:43,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-03 01:31:43,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:31:43,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-03 01:31:43,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-03 01:31:43,724 INFO L87 Difference]: Start difference. First operand has 185 states, 121 states have (on average 1.4545454545454546) internal successors, (176), 122 states have internal predecessors, (176), 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 01:31:43,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:31:43,815 INFO L93 Difference]: Finished difference Result 363 states and 545 transitions. [2023-04-03 01:31:43,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-03 01:31:43,817 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 01:31:43,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:31:43,824 INFO L225 Difference]: With dead ends: 363 [2023-04-03 01:31:43,824 INFO L226 Difference]: Without dead ends: 186 [2023-04-03 01:31:43,828 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 01:31:43,830 INFO L413 NwaCegarLoop]: 243 mSDtfsCounter, 5 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 719 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 01:31:43,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 719 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 01:31:43,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2023-04-03 01:31:43,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 186. [2023-04-03 01:31:43,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 123 states have (on average 1.4308943089430894) internal successors, (176), 123 states have internal predecessors, (176), 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 01:31:43,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 261 transitions. [2023-04-03 01:31:43,887 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 261 transitions. Word has length 48 [2023-04-03 01:31:43,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:31:43,888 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 261 transitions. [2023-04-03 01:31:43,888 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 01:31:43,889 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 261 transitions. [2023-04-03 01:31:43,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-04-03 01:31:43,894 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:31:43,894 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 01:31:43,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-03 01:31:43,897 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:31:43,898 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:31:43,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1461046358, now seen corresponding path program 1 times [2023-04-03 01:31:43,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:31:43,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487526626] [2023-04-03 01:31:43,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:31:43,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:31:43,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:31:44,573 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 01:31:44,574 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:31:44,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487526626] [2023-04-03 01:31:44,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487526626] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:31:44,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408599089] [2023-04-03 01:31:44,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:31:44,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:31:44,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:31:44,603 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 01:31:44,609 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 01:31:44,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:31:44,817 INFO L262 TraceCheckSpWp]: Trace formula consists of 843 conjuncts, 13 conjunts are in the unsatisfiable core [2023-04-03 01:31:44,823 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:31:44,976 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 01:31:44,977 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 01:31:44,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408599089] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:31:44,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 01:31:44,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2023-04-03 01:31:44,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744872245] [2023-04-03 01:31:44,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:31:44,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-03 01:31:44,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:31:44,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-03 01:31:44,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-04-03 01:31:44,979 INFO L87 Difference]: Start difference. First operand 186 states and 261 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 01:31:45,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:31:45,265 INFO L93 Difference]: Finished difference Result 544 states and 762 transitions. [2023-04-03 01:31:45,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-03 01:31:45,265 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 01:31:45,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:31:45,269 INFO L225 Difference]: With dead ends: 544 [2023-04-03 01:31:45,269 INFO L226 Difference]: Without dead ends: 348 [2023-04-03 01:31:45,271 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2023-04-03 01:31:45,271 INFO L413 NwaCegarLoop]: 251 mSDtfsCounter, 220 mSDsluCounter, 921 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 1172 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 01:31:45,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 1172 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 01:31:45,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2023-04-03 01:31:45,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 335. [2023-04-03 01:31:45,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 224 states have (on average 1.4375) internal successors, (322), 225 states have internal predecessors, (322), 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 01:31:45,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 476 transitions. [2023-04-03 01:31:45,292 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 476 transitions. Word has length 65 [2023-04-03 01:31:45,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:31:45,292 INFO L495 AbstractCegarLoop]: Abstraction has 335 states and 476 transitions. [2023-04-03 01:31:45,292 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 01:31:45,292 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 476 transitions. [2023-04-03 01:31:45,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-04-03 01:31:45,294 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:31:45,294 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 01:31:45,303 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-03 01:31:45,504 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 01:31:45,505 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:31:45,505 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:31:45,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1477725722, now seen corresponding path program 1 times [2023-04-03 01:31:45,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:31:45,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162998595] [2023-04-03 01:31:45,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:31:45,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:31:45,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:31:46,136 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 01:31:46,138 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:31:46,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162998595] [2023-04-03 01:31:46,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162998595] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:31:46,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168993758] [2023-04-03 01:31:46,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:31:46,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:31:46,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:31:46,142 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 01:31:46,175 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 01:31:46,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:31:46,349 INFO L262 TraceCheckSpWp]: Trace formula consists of 860 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-03 01:31:46,356 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:31:46,398 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 01:31:46,398 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 01:31:46,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168993758] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:31:46,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 01:31:46,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 9 [2023-04-03 01:31:46,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8406323] [2023-04-03 01:31:46,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:31:46,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-03 01:31:46,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:31:46,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-03 01:31:46,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-04-03 01:31:46,401 INFO L87 Difference]: Start difference. First operand 335 states and 476 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 01:31:46,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:31:46,466 INFO L93 Difference]: Finished difference Result 669 states and 956 transitions. [2023-04-03 01:31:46,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-03 01:31:46,467 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 01:31:46,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:31:46,472 INFO L225 Difference]: With dead ends: 669 [2023-04-03 01:31:46,472 INFO L226 Difference]: Without dead ends: 345 [2023-04-03 01:31:46,474 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 01:31:46,476 INFO L413 NwaCegarLoop]: 243 mSDtfsCounter, 6 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 725 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 01:31:46,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 725 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 01:31:46,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2023-04-03 01:31:46,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 345. [2023-04-03 01:31:46,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 232 states have (on average 1.4224137931034482) internal successors, (330), 233 states have internal predecessors, (330), 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 01:31:46,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 484 transitions. [2023-04-03 01:31:46,507 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 484 transitions. Word has length 67 [2023-04-03 01:31:46,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:31:46,508 INFO L495 AbstractCegarLoop]: Abstraction has 345 states and 484 transitions. [2023-04-03 01:31:46,508 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 01:31:46,508 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 484 transitions. [2023-04-03 01:31:46,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-04-03 01:31:46,516 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:31:46,516 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 01:31:46,524 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 01:31:46,723 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 01:31:46,724 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:31:46,724 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:31:46,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1560652298, now seen corresponding path program 1 times [2023-04-03 01:31:46,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:31:46,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521260564] [2023-04-03 01:31:46,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:31:46,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:31:46,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:31:47,307 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 01:31:47,307 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:31:47,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521260564] [2023-04-03 01:31:47,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521260564] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:31:47,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356270659] [2023-04-03 01:31:47,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:31:47,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:31:47,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:31:47,330 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 01:31:47,354 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 01:31:47,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:31:47,509 INFO L262 TraceCheckSpWp]: Trace formula consists of 880 conjuncts, 11 conjunts are in the unsatisfiable core [2023-04-03 01:31:47,515 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:31:47,572 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 01:31:47,572 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 01:31:47,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356270659] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:31:47,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 01:31:47,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 11 [2023-04-03 01:31:47,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021254316] [2023-04-03 01:31:47,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:31:47,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-03 01:31:47,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:31:47,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-03 01:31:47,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2023-04-03 01:31:47,575 INFO L87 Difference]: Start difference. First operand 345 states and 484 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 01:31:47,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:31:47,702 INFO L93 Difference]: Finished difference Result 693 states and 982 transitions. [2023-04-03 01:31:47,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-03 01:31:47,703 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 01:31:47,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:31:47,706 INFO L225 Difference]: With dead ends: 693 [2023-04-03 01:31:47,706 INFO L226 Difference]: Without dead ends: 355 [2023-04-03 01:31:47,707 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 01:31:47,709 INFO L413 NwaCegarLoop]: 231 mSDtfsCounter, 17 mSDsluCounter, 907 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 1138 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 01:31:47,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 1138 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 01:31:47,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2023-04-03 01:31:47,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 355. [2023-04-03 01:31:47,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 240 states have (on average 1.4) internal successors, (336), 241 states have internal predecessors, (336), 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 01:31:47,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 490 transitions. [2023-04-03 01:31:47,735 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 490 transitions. Word has length 75 [2023-04-03 01:31:47,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:31:47,736 INFO L495 AbstractCegarLoop]: Abstraction has 355 states and 490 transitions. [2023-04-03 01:31:47,736 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 01:31:47,736 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 490 transitions. [2023-04-03 01:31:47,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-04-03 01:31:47,738 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:31:47,738 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 01:31:47,755 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 01:31:47,946 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 01:31:47,946 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:31:47,947 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:31:47,947 INFO L85 PathProgramCache]: Analyzing trace with hash 2137733888, now seen corresponding path program 1 times [2023-04-03 01:31:47,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:31:47,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276752608] [2023-04-03 01:31:47,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:31:47,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:31:47,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:31:48,110 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 01:31:48,111 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:31:48,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276752608] [2023-04-03 01:31:48,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276752608] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:31:48,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:31:48,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-03 01:31:48,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000243757] [2023-04-03 01:31:48,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:31:48,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-03 01:31:48,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:31:48,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-03 01:31:48,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-03 01:31:48,114 INFO L87 Difference]: Start difference. First operand 355 states and 490 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 01:31:48,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:31:48,166 INFO L93 Difference]: Finished difference Result 707 states and 982 transitions. [2023-04-03 01:31:48,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-03 01:31:48,167 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 01:31:48,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:31:48,171 INFO L225 Difference]: With dead ends: 707 [2023-04-03 01:31:48,171 INFO L226 Difference]: Without dead ends: 363 [2023-04-03 01:31:48,172 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 01:31:48,172 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 5 mSDsluCounter, 475 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 720 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 01:31:48,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 720 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 01:31:48,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2023-04-03 01:31:48,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 363. [2023-04-03 01:31:48,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 246 states have (on average 1.3902439024390243) internal successors, (342), 247 states have internal predecessors, (342), 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 01:31:48,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 496 transitions. [2023-04-03 01:31:48,187 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 496 transitions. Word has length 83 [2023-04-03 01:31:48,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:31:48,187 INFO L495 AbstractCegarLoop]: Abstraction has 363 states and 496 transitions. [2023-04-03 01:31:48,187 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 01:31:48,187 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 496 transitions. [2023-04-03 01:31:48,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-04-03 01:31:48,188 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:31:48,188 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 01:31:48,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-03 01:31:48,188 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:31:48,189 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:31:48,189 INFO L85 PathProgramCache]: Analyzing trace with hash -157087330, now seen corresponding path program 1 times [2023-04-03 01:31:48,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:31:48,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087626228] [2023-04-03 01:31:48,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:31:48,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:31:48,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:31:48,701 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 01:31:48,701 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:31:48,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087626228] [2023-04-03 01:31:48,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087626228] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:31:48,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981916441] [2023-04-03 01:31:48,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:31:48,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:31:48,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:31:48,703 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 01:31:48,705 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 01:31:48,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:31:48,867 INFO L262 TraceCheckSpWp]: Trace formula consists of 896 conjuncts, 11 conjunts are in the unsatisfiable core [2023-04-03 01:31:48,870 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:31:48,911 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 01:31:48,911 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 01:31:48,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981916441] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:31:48,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 01:31:48,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 11 [2023-04-03 01:31:48,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930678013] [2023-04-03 01:31:48,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:31:48,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-03 01:31:48,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:31:48,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-03 01:31:48,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2023-04-03 01:31:48,913 INFO L87 Difference]: Start difference. First operand 363 states and 496 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 01:31:49,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:31:49,011 INFO L93 Difference]: Finished difference Result 725 states and 1002 transitions. [2023-04-03 01:31:49,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-03 01:31:49,011 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 01:31:49,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:31:49,013 INFO L225 Difference]: With dead ends: 725 [2023-04-03 01:31:49,013 INFO L226 Difference]: Without dead ends: 373 [2023-04-03 01:31:49,014 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 01:31:49,015 INFO L413 NwaCegarLoop]: 231 mSDtfsCounter, 16 mSDsluCounter, 907 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 1138 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 01:31:49,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 1138 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 01:31:49,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2023-04-03 01:31:49,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 373. [2023-04-03 01:31:49,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 254 states have (on average 1.3779527559055118) internal successors, (350), 255 states have internal predecessors, (350), 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 01:31:49,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 504 transitions. [2023-04-03 01:31:49,025 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 504 transitions. Word has length 83 [2023-04-03 01:31:49,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:31:49,025 INFO L495 AbstractCegarLoop]: Abstraction has 373 states and 504 transitions. [2023-04-03 01:31:49,025 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 01:31:49,025 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 504 transitions. [2023-04-03 01:31:49,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-04-03 01:31:49,026 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:31:49,026 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 01:31:49,047 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 01:31:49,233 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 01:31:49,233 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:31:49,234 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:31:49,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1888953824, now seen corresponding path program 1 times [2023-04-03 01:31:49,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:31:49,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754355096] [2023-04-03 01:31:49,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:31:49,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:31:49,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:31:49,398 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 01:31:49,399 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:31:49,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754355096] [2023-04-03 01:31:49,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754355096] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:31:49,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:31:49,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-03 01:31:49,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328681431] [2023-04-03 01:31:49,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:31:49,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-03 01:31:49,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:31:49,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-03 01:31:49,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-03 01:31:49,401 INFO L87 Difference]: Start difference. First operand 373 states and 504 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 01:31:49,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:31:49,446 INFO L93 Difference]: Finished difference Result 747 states and 1016 transitions. [2023-04-03 01:31:49,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-03 01:31:49,446 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 01:31:49,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:31:49,449 INFO L225 Difference]: With dead ends: 747 [2023-04-03 01:31:49,449 INFO L226 Difference]: Without dead ends: 385 [2023-04-03 01:31:49,450 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 01:31:49,450 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 7 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 722 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 01:31:49,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 722 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 01:31:49,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2023-04-03 01:31:49,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 385. [2023-04-03 01:31:49,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 264 states have (on average 1.3636363636363635) internal successors, (360), 265 states have internal predecessors, (360), 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 01:31:49,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 514 transitions. [2023-04-03 01:31:49,466 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 514 transitions. Word has length 91 [2023-04-03 01:31:49,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:31:49,466 INFO L495 AbstractCegarLoop]: Abstraction has 385 states and 514 transitions. [2023-04-03 01:31:49,466 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 01:31:49,466 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 514 transitions. [2023-04-03 01:31:49,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-04-03 01:31:49,469 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:31:49,469 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 01:31:49,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-03 01:31:49,469 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:31:49,470 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:31:49,470 INFO L85 PathProgramCache]: Analyzing trace with hash 1039841706, now seen corresponding path program 1 times [2023-04-03 01:31:49,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:31:49,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644088443] [2023-04-03 01:31:49,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:31:49,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:31:49,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:31:49,903 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 01:31:49,903 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:31:49,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644088443] [2023-04-03 01:31:49,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644088443] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:31:49,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325176966] [2023-04-03 01:31:49,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:31:49,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:31:49,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:31:49,911 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 01:31:49,912 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 01:31:50,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:31:50,085 INFO L262 TraceCheckSpWp]: Trace formula consists of 932 conjuncts, 27 conjunts are in the unsatisfiable core [2023-04-03 01:31:50,092 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:31:51,242 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 01:31:51,242 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-03 01:31:53,749 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 8191 disjunctions. This might take some time... [2023-04-03 01:31:58,776 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 8191 disjunctions.