/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.1.ufo.UNBOUNDED.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-03 01:31:14,288 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-03 01:31:14,290 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-03 01:31:14,320 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-03 01:31:14,321 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-03 01:31:14,323 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-03 01:31:14,326 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-03 01:31:14,327 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-03 01:31:14,328 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-03 01:31:14,332 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-03 01:31:14,333 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-03 01:31:14,334 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-03 01:31:14,334 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-03 01:31:14,336 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-03 01:31:14,336 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-03 01:31:14,337 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-03 01:31:14,338 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-03 01:31:14,338 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-03 01:31:14,340 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-03 01:31:14,343 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-03 01:31:14,344 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-03 01:31:14,345 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-03 01:31:14,346 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-03 01:31:14,347 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-03 01:31:14,353 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-03 01:31:14,353 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-03 01:31:14,353 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-03 01:31:14,354 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-03 01:31:14,354 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-03 01:31:14,355 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-03 01:31:14,355 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-03 01:31:14,356 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-03 01:31:14,357 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-03 01:31:14,357 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-03 01:31:14,357 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-03 01:31:14,358 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-03 01:31:14,358 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-03 01:31:14,358 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-03 01:31:14,358 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-03 01:31:14,359 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-03 01:31:14,359 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-03 01:31:14,360 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 01:31:14,384 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-03 01:31:14,384 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-03 01:31:14,384 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-03 01:31:14,384 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-03 01:31:14,385 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-03 01:31:14,385 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-03 01:31:14,385 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-03 01:31:14,385 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-03 01:31:14,385 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-03 01:31:14,385 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-03 01:31:14,386 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-03 01:31:14,386 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-03 01:31:14,386 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-03 01:31:14,386 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-03 01:31:14,386 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-03 01:31:14,386 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-03 01:31:14,387 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-03 01:31:14,387 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-03 01:31:14,387 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-03 01:31:14,387 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-03 01:31:14,387 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-03 01:31:14,387 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-03 01:31:14,387 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-03 01:31:14,387 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-03 01:31:14,387 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-03 01:31:14,388 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-03 01:31:14,388 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-03 01:31:14,388 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-03 01:31:14,388 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-03 01:31:14,388 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-03 01:31:14,388 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-03 01:31:14,388 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-03 01:31:14,389 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 01:31:14,389 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-03 01:31:14,389 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-03 01:31:14,389 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-03 01:31:14,389 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-03 01:31:14,389 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-03 01:31:14,389 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-03 01:31:14,389 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-03 01:31:14,389 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-03 01:31:14,389 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-03 01:31:14,581 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-03 01:31:14,599 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-03 01:31:14,603 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-03 01:31:14,604 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-03 01:31:14,604 INFO L275 PluginConnector]: CDTParser initialized [2023-04-03 01:31:14,605 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.1.ufo.UNBOUNDED.pals.c [2023-04-03 01:31:15,741 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-03 01:31:15,951 INFO L351 CDTParser]: Found 1 translation units. [2023-04-03 01:31:15,952 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.1.ufo.UNBOUNDED.pals.c [2023-04-03 01:31:15,958 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c59b1306f/e9f1d507f84a45aebb0231df2c7e005e/FLAG1d8bbe9ce [2023-04-03 01:31:15,967 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c59b1306f/e9f1d507f84a45aebb0231df2c7e005e [2023-04-03 01:31:15,969 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-03 01:31:15,970 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-03 01:31:15,971 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-03 01:31:15,971 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-03 01:31:15,973 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-03 01:31:15,974 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 01:31:15" (1/1) ... [2023-04-03 01:31:15,974 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19c0745 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:31:15, skipping insertion in model container [2023-04-03 01:31:15,974 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 01:31:15" (1/1) ... [2023-04-03 01:31:15,979 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-03 01:31:16,000 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-03 01:31:16,133 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.1.ufo.UNBOUNDED.pals.c[14682,14695] [2023-04-03 01:31:16,135 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 01:31:16,143 INFO L203 MainTranslator]: Completed pre-run [2023-04-03 01:31:16,184 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.1.ufo.UNBOUNDED.pals.c[14682,14695] [2023-04-03 01:31:16,184 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 01:31:16,197 INFO L208 MainTranslator]: Completed translation [2023-04-03 01:31:16,197 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:31:16 WrapperNode [2023-04-03 01:31:16,197 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-03 01:31:16,198 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-03 01:31:16,198 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-03 01:31:16,198 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-03 01:31:16,207 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:31:16" (1/1) ... [2023-04-03 01:31:16,207 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:31:16" (1/1) ... [2023-04-03 01:31:16,215 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:31:16" (1/1) ... [2023-04-03 01:31:16,215 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:31:16" (1/1) ... [2023-04-03 01:31:16,225 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:31:16" (1/1) ... [2023-04-03 01:31:16,230 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:31:16" (1/1) ... [2023-04-03 01:31:16,232 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:31:16" (1/1) ... [2023-04-03 01:31:16,234 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:31:16" (1/1) ... [2023-04-03 01:31:16,237 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-03 01:31:16,238 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-03 01:31:16,238 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-03 01:31:16,238 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-03 01:31:16,239 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:31:16" (1/1) ... [2023-04-03 01:31:16,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 01:31:16,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:31:16,261 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 01:31:16,324 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 01:31:16,334 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-03 01:31:16,335 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-03 01:31:16,335 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-03 01:31:16,335 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-03 01:31:16,335 INFO L138 BoogieDeclarations]: Found implementation of procedure write_side1_failed_history [2023-04-03 01:31:16,335 INFO L138 BoogieDeclarations]: Found implementation of procedure read_side1_failed_history [2023-04-03 01:31:16,335 INFO L138 BoogieDeclarations]: Found implementation of procedure write_side2_failed_history [2023-04-03 01:31:16,335 INFO L138 BoogieDeclarations]: Found implementation of procedure read_side2_failed_history [2023-04-03 01:31:16,335 INFO L138 BoogieDeclarations]: Found implementation of procedure write_active_side_history [2023-04-03 01:31:16,335 INFO L138 BoogieDeclarations]: Found implementation of procedure read_active_side_history [2023-04-03 01:31:16,335 INFO L138 BoogieDeclarations]: Found implementation of procedure write_manual_selection_history [2023-04-03 01:31:16,335 INFO L138 BoogieDeclarations]: Found implementation of procedure read_manual_selection_history [2023-04-03 01:31:16,335 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2023-04-03 01:31:16,336 INFO L138 BoogieDeclarations]: Found implementation of procedure flip_the_side [2023-04-03 01:31:16,336 INFO L138 BoogieDeclarations]: Found implementation of procedure Console_task_each_pals_period [2023-04-03 01:31:16,336 INFO L138 BoogieDeclarations]: Found implementation of procedure Side1_activestandby_task_each_pals_period [2023-04-03 01:31:16,336 INFO L138 BoogieDeclarations]: Found implementation of procedure Side2_activestandby_task_each_pals_period [2023-04-03 01:31:16,336 INFO L138 BoogieDeclarations]: Found implementation of procedure Pendulum_prism_task_each_pals_period [2023-04-03 01:31:16,336 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2023-04-03 01:31:16,336 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-03 01:31:16,336 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2023-04-03 01:31:16,336 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-03 01:31:16,336 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-03 01:31:16,336 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-03 01:31:16,337 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-03 01:31:16,337 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-03 01:31:16,337 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-03 01:31:16,337 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-03 01:31:16,337 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-03 01:31:16,337 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-03 01:31:16,337 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-03 01:31:16,337 INFO L130 BoogieDeclarations]: Found specification of procedure write_side1_failed_history [2023-04-03 01:31:16,337 INFO L130 BoogieDeclarations]: Found specification of procedure read_side1_failed_history [2023-04-03 01:31:16,337 INFO L130 BoogieDeclarations]: Found specification of procedure write_side2_failed_history [2023-04-03 01:31:16,337 INFO L130 BoogieDeclarations]: Found specification of procedure read_side2_failed_history [2023-04-03 01:31:16,337 INFO L130 BoogieDeclarations]: Found specification of procedure write_active_side_history [2023-04-03 01:31:16,337 INFO L130 BoogieDeclarations]: Found specification of procedure read_active_side_history [2023-04-03 01:31:16,337 INFO L130 BoogieDeclarations]: Found specification of procedure write_manual_selection_history [2023-04-03 01:31:16,338 INFO L130 BoogieDeclarations]: Found specification of procedure read_manual_selection_history [2023-04-03 01:31:16,338 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-03 01:31:16,338 INFO L130 BoogieDeclarations]: Found specification of procedure flip_the_side [2023-04-03 01:31:16,338 INFO L130 BoogieDeclarations]: Found specification of procedure Console_task_each_pals_period [2023-04-03 01:31:16,338 INFO L130 BoogieDeclarations]: Found specification of procedure Side1_activestandby_task_each_pals_period [2023-04-03 01:31:16,338 INFO L130 BoogieDeclarations]: Found specification of procedure Side2_activestandby_task_each_pals_period [2023-04-03 01:31:16,338 INFO L130 BoogieDeclarations]: Found specification of procedure Pendulum_prism_task_each_pals_period [2023-04-03 01:31:16,338 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-03 01:31:16,338 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-03 01:31:16,338 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-03 01:31:16,338 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-03 01:31:16,338 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-03 01:31:16,338 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-03 01:31:16,339 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-03 01:31:16,339 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-03 01:31:16,475 INFO L236 CfgBuilder]: Building ICFG [2023-04-03 01:31:16,476 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-03 01:31:16,911 INFO L277 CfgBuilder]: Performing block encoding [2023-04-03 01:31:17,008 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-03 01:31:17,008 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-03 01:31:17,011 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 01:31:17 BoogieIcfgContainer [2023-04-03 01:31:17,012 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-03 01:31:17,014 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-03 01:31:17,014 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-03 01:31:17,016 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-03 01:31:17,016 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.04 01:31:15" (1/3) ... [2023-04-03 01:31:17,016 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12f6b9b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 01:31:17, skipping insertion in model container [2023-04-03 01:31:17,016 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:31:16" (2/3) ... [2023-04-03 01:31:17,017 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12f6b9b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 01:31:17, skipping insertion in model container [2023-04-03 01:31:17,017 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 01:31:17" (3/3) ... [2023-04-03 01:31:17,019 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_STARTPALS_ActiveStandby.1.ufo.UNBOUNDED.pals.c [2023-04-03 01:31:17,031 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-03 01:31:17,031 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-03 01:31:17,079 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-03 01:31:17,085 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;@6af3430c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-03 01:31:17,085 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-03 01:31:17,090 INFO L276 IsEmpty]: Start isEmpty. Operand has 189 states, 125 states have (on average 1.472) internal successors, (184), 127 states have internal predecessors, (184), 43 states have call successors, (43), 19 states have call predecessors, (43), 19 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2023-04-03 01:31:17,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-04-03 01:31:17,097 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:31:17,098 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 01:31:17,098 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:31:17,103 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:31:17,103 INFO L85 PathProgramCache]: Analyzing trace with hash 558178186, now seen corresponding path program 1 times [2023-04-03 01:31:17,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:31:17,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520043820] [2023-04-03 01:31:17,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:31:17,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:31:17,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:31:17,552 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 01:31:17,553 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:31:17,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520043820] [2023-04-03 01:31:17,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520043820] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:31:17,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:31:17,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-03 01:31:17,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147398518] [2023-04-03 01:31:17,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:31:17,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-03 01:31:17,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:31:17,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-03 01:31:17,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-03 01:31:17,603 INFO L87 Difference]: Start difference. First operand has 189 states, 125 states have (on average 1.472) internal successors, (184), 127 states have internal predecessors, (184), 43 states have call successors, (43), 19 states have call predecessors, (43), 19 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) [2023-04-03 01:31:17,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:31:17,752 INFO L93 Difference]: Finished difference Result 368 states and 559 transitions. [2023-04-03 01:31:17,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-03 01:31:17,755 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 01:31:17,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:31:17,761 INFO L225 Difference]: With dead ends: 368 [2023-04-03 01:31:17,761 INFO L226 Difference]: Without dead ends: 190 [2023-04-03 01:31:17,769 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 01:31:17,772 INFO L413 NwaCegarLoop]: 249 mSDtfsCounter, 5 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 737 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 01:31:17,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 737 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 01:31:17,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2023-04-03 01:31:17,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 190. [2023-04-03 01:31:17,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 127 states have (on average 1.4488188976377954) internal successors, (184), 128 states have internal predecessors, (184), 43 states have call successors, (43), 20 states have call predecessors, (43), 19 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2023-04-03 01:31:17,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 269 transitions. [2023-04-03 01:31:17,842 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 269 transitions. Word has length 48 [2023-04-03 01:31:17,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:31:17,843 INFO L495 AbstractCegarLoop]: Abstraction has 190 states and 269 transitions. [2023-04-03 01:31:17,845 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 01:31:17,845 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 269 transitions. [2023-04-03 01:31:17,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-04-03 01:31:17,846 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:31:17,847 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:31:17,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-03 01:31:17,847 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:31:17,847 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:31:17,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1895037546, now seen corresponding path program 1 times [2023-04-03 01:31:17,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:31:17,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41859387] [2023-04-03 01:31:17,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:31:17,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:31:17,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:31:18,366 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 01:31:18,366 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:31:18,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41859387] [2023-04-03 01:31:18,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41859387] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:31:18,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730513105] [2023-04-03 01:31:18,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:31:18,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:31:18,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:31:18,369 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 01:31:18,370 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 01:31:18,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:31:18,534 INFO L262 TraceCheckSpWp]: Trace formula consists of 848 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-03 01:31:18,540 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:31:18,667 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 01:31:18,668 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 01:31:18,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730513105] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:31:18,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 01:31:18,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 15 [2023-04-03 01:31:18,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824864949] [2023-04-03 01:31:18,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:31:18,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-03 01:31:18,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:31:18,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-03 01:31:18,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2023-04-03 01:31:18,675 INFO L87 Difference]: Start difference. First operand 190 states and 269 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 6 states have call successors, (17), 5 states have call predecessors, (17), 5 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) [2023-04-03 01:31:19,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:31:19,401 INFO L93 Difference]: Finished difference Result 428 states and 605 transitions. [2023-04-03 01:31:19,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-03 01:31:19,401 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 6 states have call successors, (17), 5 states have call predecessors, (17), 5 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) Word has length 66 [2023-04-03 01:31:19,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:31:19,409 INFO L225 Difference]: With dead ends: 428 [2023-04-03 01:31:19,409 INFO L226 Difference]: Without dead ends: 249 [2023-04-03 01:31:19,411 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2023-04-03 01:31:19,412 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 506 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1001 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 513 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 1207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 1001 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-03 01:31:19,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [513 Valid, 61 Invalid, 1207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 1001 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-03 01:31:19,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2023-04-03 01:31:19,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 244. [2023-04-03 01:31:19,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 161 states have (on average 1.4409937888198758) internal successors, (232), 163 states have internal predecessors, (232), 54 states have call successors, (54), 29 states have call predecessors, (54), 28 states have return successors, (54), 51 states have call predecessors, (54), 53 states have call successors, (54) [2023-04-03 01:31:19,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 340 transitions. [2023-04-03 01:31:19,454 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 340 transitions. Word has length 66 [2023-04-03 01:31:19,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:31:19,454 INFO L495 AbstractCegarLoop]: Abstraction has 244 states and 340 transitions. [2023-04-03 01:31:19,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 6 states have call successors, (17), 5 states have call predecessors, (17), 5 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) [2023-04-03 01:31:19,455 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 340 transitions. [2023-04-03 01:31:19,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-04-03 01:31:19,474 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:31:19,474 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 01:31:19,490 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 01:31:19,675 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 01:31:19,675 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:31:19,676 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:31:19,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1927572199, now seen corresponding path program 1 times [2023-04-03 01:31:19,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:31:19,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818386622] [2023-04-03 01:31:19,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:31:19,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:31:19,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:31:20,084 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 01:31:20,085 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:31:20,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818386622] [2023-04-03 01:31:20,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818386622] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:31:20,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513325899] [2023-04-03 01:31:20,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:31:20,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:31:20,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:31:20,087 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 01:31:20,149 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 01:31:20,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:31:20,297 INFO L262 TraceCheckSpWp]: Trace formula consists of 849 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-03 01:31:20,303 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:31:20,397 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 01:31:20,398 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 01:31:20,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513325899] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:31:20,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 01:31:20,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 15 [2023-04-03 01:31:20,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108951766] [2023-04-03 01:31:20,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:31:20,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-03 01:31:20,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:31:20,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-03 01:31:20,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2023-04-03 01:31:20,400 INFO L87 Difference]: Start difference. First operand 244 states and 340 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 6 states have call successors, (17), 5 states have call predecessors, (17), 5 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) [2023-04-03 01:31:20,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:31:20,976 INFO L93 Difference]: Finished difference Result 430 states and 607 transitions. [2023-04-03 01:31:20,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-03 01:31:20,989 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 6 states have call successors, (17), 5 states have call predecessors, (17), 5 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) Word has length 67 [2023-04-03 01:31:20,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:31:20,991 INFO L225 Difference]: With dead ends: 430 [2023-04-03 01:31:20,991 INFO L226 Difference]: Without dead ends: 248 [2023-04-03 01:31:20,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2023-04-03 01:31:20,992 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 495 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 999 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 501 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 1191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 999 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-03 01:31:20,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [501 Valid, 69 Invalid, 1191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 999 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-03 01:31:20,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2023-04-03 01:31:21,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 244. [2023-04-03 01:31:21,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 161 states have (on average 1.4409937888198758) internal successors, (232), 163 states have internal predecessors, (232), 54 states have call successors, (54), 29 states have call predecessors, (54), 28 states have return successors, (54), 51 states have call predecessors, (54), 53 states have call successors, (54) [2023-04-03 01:31:21,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 340 transitions. [2023-04-03 01:31:21,028 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 340 transitions. Word has length 67 [2023-04-03 01:31:21,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:31:21,028 INFO L495 AbstractCegarLoop]: Abstraction has 244 states and 340 transitions. [2023-04-03 01:31:21,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 6 states have call successors, (17), 5 states have call predecessors, (17), 5 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) [2023-04-03 01:31:21,029 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 340 transitions. [2023-04-03 01:31:21,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-04-03 01:31:21,030 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:31:21,030 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:31:21,048 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 01:31:21,235 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 01:31:21,235 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:31:21,236 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:31:21,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1039266438, now seen corresponding path program 1 times [2023-04-03 01:31:21,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:31:21,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486991457] [2023-04-03 01:31:21,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:31:21,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:31:21,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:31:21,754 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 01:31:21,755 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:31:21,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486991457] [2023-04-03 01:31:21,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486991457] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:31:21,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063206595] [2023-04-03 01:31:21,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:31:21,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:31:21,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:31:21,756 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 01:31:21,784 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 01:31:21,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:31:21,912 INFO L262 TraceCheckSpWp]: Trace formula consists of 848 conjuncts, 13 conjunts are in the unsatisfiable core [2023-04-03 01:31:21,916 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:31:22,066 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 01:31:22,066 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 01:31:22,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063206595] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:31:22,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 01:31:22,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2023-04-03 01:31:22,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824168570] [2023-04-03 01:31:22,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:31:22,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-03 01:31:22,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:31:22,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-03 01:31:22,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-04-03 01:31:22,068 INFO L87 Difference]: Start difference. First operand 244 states and 340 transitions. Second operand has 8 states, 6 states have (on average 6.5) internal successors, (39), 8 states have internal predecessors, (39), 5 states have call successors, (17), 4 states have call predecessors, (17), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2023-04-03 01:31:22,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:31:22,348 INFO L93 Difference]: Finished difference Result 661 states and 924 transitions. [2023-04-03 01:31:22,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-03 01:31:22,349 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 6.5) internal successors, (39), 8 states have internal predecessors, (39), 5 states have call successors, (17), 4 states have call predecessors, (17), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 69 [2023-04-03 01:31:22,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:31:22,353 INFO L225 Difference]: With dead ends: 661 [2023-04-03 01:31:22,354 INFO L226 Difference]: Without dead ends: 441 [2023-04-03 01:31:22,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2023-04-03 01:31:22,357 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 240 mSDsluCounter, 1198 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 1457 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 01:31:22,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 1457 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 01:31:22,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2023-04-03 01:31:22,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 429. [2023-04-03 01:31:22,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 286 states have (on average 1.4405594405594406) internal successors, (412), 291 states have internal predecessors, (412), 94 states have call successors, (94), 47 states have call predecessors, (94), 48 states have return successors, (97), 90 states have call predecessors, (97), 93 states have call successors, (97) [2023-04-03 01:31:22,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 603 transitions. [2023-04-03 01:31:22,405 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 603 transitions. Word has length 69 [2023-04-03 01:31:22,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:31:22,405 INFO L495 AbstractCegarLoop]: Abstraction has 429 states and 603 transitions. [2023-04-03 01:31:22,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 6.5) internal successors, (39), 8 states have internal predecessors, (39), 5 states have call successors, (17), 4 states have call predecessors, (17), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2023-04-03 01:31:22,405 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 603 transitions. [2023-04-03 01:31:22,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-04-03 01:31:22,409 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:31:22,409 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:31:22,416 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-04-03 01:31:22,615 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 01:31:22,616 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:31:22,616 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:31:22,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1911334742, now seen corresponding path program 1 times [2023-04-03 01:31:22,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:31:22,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410075507] [2023-04-03 01:31:22,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:31:22,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:31:22,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:31:23,109 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 01:31:23,109 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:31:23,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410075507] [2023-04-03 01:31:23,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410075507] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:31:23,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152091991] [2023-04-03 01:31:23,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:31:23,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:31:23,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:31:23,111 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 01:31:23,117 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 01:31:23,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:31:23,267 INFO L262 TraceCheckSpWp]: Trace formula consists of 865 conjuncts, 16 conjunts are in the unsatisfiable core [2023-04-03 01:31:23,270 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:31:23,386 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 01:31:23,386 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-03 01:31:23,502 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 01:31:23,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152091991] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-03 01:31:23,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-03 01:31:23,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 6] total 15 [2023-04-03 01:31:23,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883683929] [2023-04-03 01:31:23,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:31:23,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-03 01:31:23,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:31:23,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-03 01:31:23,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2023-04-03 01:31:23,505 INFO L87 Difference]: Start difference. First operand 429 states and 603 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 states have internal predecessors, (40), 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 01:31:23,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:31:23,624 INFO L93 Difference]: Finished difference Result 772 states and 1104 transitions. [2023-04-03 01:31:23,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-03 01:31:23,624 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 states have internal predecessors, (40), 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 71 [2023-04-03 01:31:23,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:31:23,628 INFO L225 Difference]: With dead ends: 772 [2023-04-03 01:31:23,628 INFO L226 Difference]: Without dead ends: 433 [2023-04-03 01:31:23,629 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 138 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2023-04-03 01:31:23,629 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 14 mSDsluCounter, 726 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 971 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 01:31:23,630 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 971 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 01:31:23,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2023-04-03 01:31:23,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 425. [2023-04-03 01:31:23,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 284 states have (on average 1.4366197183098592) internal successors, (408), 289 states have internal predecessors, (408), 92 states have call successors, (92), 47 states have call predecessors, (92), 48 states have return successors, (95), 88 states have call predecessors, (95), 91 states have call successors, (95) [2023-04-03 01:31:23,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 595 transitions. [2023-04-03 01:31:23,664 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 595 transitions. Word has length 71 [2023-04-03 01:31:23,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:31:23,666 INFO L495 AbstractCegarLoop]: Abstraction has 425 states and 595 transitions. [2023-04-03 01:31:23,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 states have internal predecessors, (40), 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 01:31:23,666 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 595 transitions. [2023-04-03 01:31:23,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-04-03 01:31:23,667 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:31:23,668 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] [2023-04-03 01:31:23,677 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 01:31:23,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:31:23,875 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:31:23,876 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:31:23,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1535705286, now seen corresponding path program 1 times [2023-04-03 01:31:23,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:31:23,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636849600] [2023-04-03 01:31:23,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:31:23,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:31:23,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:31:24,221 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 01:31:24,221 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:31:24,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636849600] [2023-04-03 01:31:24,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636849600] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:31:24,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613976441] [2023-04-03 01:31:24,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:31:24,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:31:24,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:31:24,263 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 01:31:24,302 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 01:31:24,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:31:24,429 INFO L262 TraceCheckSpWp]: Trace formula consists of 884 conjuncts, 10 conjunts are in the unsatisfiable core [2023-04-03 01:31:24,432 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:31:24,446 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 01:31:24,447 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 01:31:24,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613976441] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:31:24,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 01:31:24,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 8 [2023-04-03 01:31:24,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438235285] [2023-04-03 01:31:24,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:31:24,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-03 01:31:24,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:31:24,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-03 01:31:24,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-04-03 01:31:24,453 INFO L87 Difference]: Start difference. First operand 425 states and 595 transitions. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) [2023-04-03 01:31:24,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:31:24,507 INFO L93 Difference]: Finished difference Result 764 states and 1084 transitions. [2023-04-03 01:31:24,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-03 01:31:24,507 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) Word has length 78 [2023-04-03 01:31:24,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:31:24,509 INFO L225 Difference]: With dead ends: 764 [2023-04-03 01:31:24,509 INFO L226 Difference]: Without dead ends: 425 [2023-04-03 01:31:24,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-04-03 01:31:24,512 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 7 mSDsluCounter, 481 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 725 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 01:31:24,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 725 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 01:31:24,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2023-04-03 01:31:24,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 425. [2023-04-03 01:31:24,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 284 states have (on average 1.4295774647887325) internal successors, (406), 289 states have internal predecessors, (406), 92 states have call successors, (92), 47 states have call predecessors, (92), 48 states have return successors, (95), 88 states have call predecessors, (95), 91 states have call successors, (95) [2023-04-03 01:31:24,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 593 transitions. [2023-04-03 01:31:24,539 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 593 transitions. Word has length 78 [2023-04-03 01:31:24,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:31:24,539 INFO L495 AbstractCegarLoop]: Abstraction has 425 states and 593 transitions. [2023-04-03 01:31:24,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) [2023-04-03 01:31:24,540 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 593 transitions. [2023-04-03 01:31:24,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-04-03 01:31:24,541 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:31:24,541 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] [2023-04-03 01:31:24,550 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-03 01:31:24,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:31:24,748 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:31:24,749 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:31:24,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1373406714, now seen corresponding path program 1 times [2023-04-03 01:31:24,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:31:24,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988197804] [2023-04-03 01:31:24,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:31:24,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:31:24,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:31:25,202 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 01:31:25,203 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:31:25,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988197804] [2023-04-03 01:31:25,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988197804] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:31:25,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491896973] [2023-04-03 01:31:25,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:31:25,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:31:25,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:31:25,225 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 01:31:25,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-03 01:31:25,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:31:25,378 INFO L262 TraceCheckSpWp]: Trace formula consists of 885 conjuncts, 11 conjunts are in the unsatisfiable core [2023-04-03 01:31:25,382 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:31:25,420 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 01:31:25,421 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 01:31:25,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491896973] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:31:25,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 01:31:25,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 11 [2023-04-03 01:31:25,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176496171] [2023-04-03 01:31:25,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:31:25,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-03 01:31:25,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:31:25,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-03 01:31:25,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2023-04-03 01:31:25,423 INFO L87 Difference]: Start difference. First operand 425 states and 593 transitions. Second operand has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 5 states have internal predecessors, (46), 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 01:31:25,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:31:25,516 INFO L93 Difference]: Finished difference Result 780 states and 1108 transitions. [2023-04-03 01:31:25,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-03 01:31:25,517 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 5 states have internal predecessors, (46), 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 79 [2023-04-03 01:31:25,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:31:25,519 INFO L225 Difference]: With dead ends: 780 [2023-04-03 01:31:25,521 INFO L226 Difference]: Without dead ends: 445 [2023-04-03 01:31:25,522 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 79 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 01:31:25,523 INFO L413 NwaCegarLoop]: 236 mSDtfsCounter, 14 mSDsluCounter, 930 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 1166 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 01:31:25,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 1166 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 01:31:25,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2023-04-03 01:31:25,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 445. [2023-04-03 01:31:25,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 300 states have (on average 1.4066666666666667) internal successors, (422), 305 states have internal predecessors, (422), 92 states have call successors, (92), 51 states have call predecessors, (92), 52 states have return successors, (95), 88 states have call predecessors, (95), 91 states have call successors, (95) [2023-04-03 01:31:25,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 609 transitions. [2023-04-03 01:31:25,547 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 609 transitions. Word has length 79 [2023-04-03 01:31:25,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:31:25,547 INFO L495 AbstractCegarLoop]: Abstraction has 445 states and 609 transitions. [2023-04-03 01:31:25,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 5 states have internal predecessors, (46), 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 01:31:25,548 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 609 transitions. [2023-04-03 01:31:25,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-04-03 01:31:25,552 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:31:25,553 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, 1, 1, 1, 1] [2023-04-03 01:31:25,562 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-04-03 01:31:25,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:31:25,762 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:31:25,763 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:31:25,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1724709008, now seen corresponding path program 1 times [2023-04-03 01:31:25,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:31:25,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377555411] [2023-04-03 01:31:25,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:31:25,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:31:25,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:31:25,877 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 01:31:25,877 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:31:25,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377555411] [2023-04-03 01:31:25,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377555411] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:31:25,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:31:25,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-03 01:31:25,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731986232] [2023-04-03 01:31:25,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:31:25,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-03 01:31:25,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:31:25,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-03 01:31:25,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-03 01:31:25,880 INFO L87 Difference]: Start difference. First operand 445 states and 609 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 3 states have internal predecessors, (52), 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 01:31:25,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:31:25,933 INFO L93 Difference]: Finished difference Result 808 states and 1118 transitions. [2023-04-03 01:31:25,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-03 01:31:25,933 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 3 states have internal predecessors, (52), 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 87 [2023-04-03 01:31:25,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:31:25,935 INFO L225 Difference]: With dead ends: 808 [2023-04-03 01:31:25,935 INFO L226 Difference]: Without dead ends: 453 [2023-04-03 01:31:25,936 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 01:31:25,937 INFO L413 NwaCegarLoop]: 248 mSDtfsCounter, 5 mSDsluCounter, 481 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 729 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 01:31:25,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 729 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 01:31:25,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2023-04-03 01:31:25,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 453. [2023-04-03 01:31:25,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 306 states have (on average 1.3986928104575163) internal successors, (428), 311 states have internal predecessors, (428), 92 states have call successors, (92), 53 states have call predecessors, (92), 54 states have return successors, (95), 88 states have call predecessors, (95), 91 states have call successors, (95) [2023-04-03 01:31:25,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 615 transitions. [2023-04-03 01:31:25,958 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 615 transitions. Word has length 87 [2023-04-03 01:31:25,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:31:25,959 INFO L495 AbstractCegarLoop]: Abstraction has 453 states and 615 transitions. [2023-04-03 01:31:25,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 3 states have internal predecessors, (52), 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 01:31:25,959 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 615 transitions. [2023-04-03 01:31:25,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-04-03 01:31:25,963 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:31:25,964 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, 1, 1, 1, 1] [2023-04-03 01:31:25,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-03 01:31:25,964 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:31:25,964 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:31:25,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1871225902, now seen corresponding path program 1 times [2023-04-03 01:31:25,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:31:25,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954210796] [2023-04-03 01:31:25,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:31:25,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:31:25,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:31:26,454 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 01:31:26,455 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:31:26,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954210796] [2023-04-03 01:31:26,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954210796] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:31:26,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992557917] [2023-04-03 01:31:26,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:31:26,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:31:26,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:31:26,456 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 01:31:26,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-03 01:31:26,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:31:26,633 INFO L262 TraceCheckSpWp]: Trace formula consists of 901 conjuncts, 11 conjunts are in the unsatisfiable core [2023-04-03 01:31:26,636 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:31:26,675 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 01:31:26,675 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 01:31:26,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992557917] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:31:26,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 01:31:26,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 11 [2023-04-03 01:31:26,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266307867] [2023-04-03 01:31:26,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:31:26,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-03 01:31:26,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:31:26,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-03 01:31:26,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2023-04-03 01:31:26,678 INFO L87 Difference]: Start difference. First operand 453 states and 615 transitions. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 5 states have internal predecessors, (52), 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 01:31:26,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:31:26,770 INFO L93 Difference]: Finished difference Result 826 states and 1138 transitions. [2023-04-03 01:31:26,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-03 01:31:26,770 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 5 states have internal predecessors, (52), 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 87 [2023-04-03 01:31:26,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:31:26,772 INFO L225 Difference]: With dead ends: 826 [2023-04-03 01:31:26,772 INFO L226 Difference]: Without dead ends: 463 [2023-04-03 01:31:26,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 87 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 01:31:26,774 INFO L413 NwaCegarLoop]: 236 mSDtfsCounter, 14 mSDsluCounter, 930 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 1166 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 01:31:26,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 1166 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 01:31:26,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2023-04-03 01:31:26,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 463. [2023-04-03 01:31:26,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 314 states have (on average 1.3885350318471337) internal successors, (436), 319 states have internal predecessors, (436), 92 states have call successors, (92), 55 states have call predecessors, (92), 56 states have return successors, (95), 88 states have call predecessors, (95), 91 states have call successors, (95) [2023-04-03 01:31:26,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 623 transitions. [2023-04-03 01:31:26,794 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 623 transitions. Word has length 87 [2023-04-03 01:31:26,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:31:26,794 INFO L495 AbstractCegarLoop]: Abstraction has 463 states and 623 transitions. [2023-04-03 01:31:26,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 5 states have internal predecessors, (52), 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 01:31:26,794 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 623 transitions. [2023-04-03 01:31:26,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-04-03 01:31:26,795 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:31:26,795 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, 1, 1, 1, 1] [2023-04-03 01:31:26,803 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-03 01:31:27,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:31:27,001 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:31:27,001 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:31:27,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1550733008, now seen corresponding path program 1 times [2023-04-03 01:31:27,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:31:27,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091079808] [2023-04-03 01:31:27,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:31:27,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:31:27,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:31:27,171 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 01:31:27,171 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:31:27,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091079808] [2023-04-03 01:31:27,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091079808] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:31:27,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:31:27,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-03 01:31:27,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545148137] [2023-04-03 01:31:27,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:31:27,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-03 01:31:27,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:31:27,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-03 01:31:27,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-03 01:31:27,172 INFO L87 Difference]: Start difference. First operand 463 states and 623 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 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 01:31:27,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:31:27,231 INFO L93 Difference]: Finished difference Result 848 states and 1152 transitions. [2023-04-03 01:31:27,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-03 01:31:27,231 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 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 95 [2023-04-03 01:31:27,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:31:27,234 INFO L225 Difference]: With dead ends: 848 [2023-04-03 01:31:27,234 INFO L226 Difference]: Without dead ends: 475 [2023-04-03 01:31:27,235 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 01:31:27,235 INFO L413 NwaCegarLoop]: 247 mSDtfsCounter, 7 mSDsluCounter, 484 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 731 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 01:31:27,236 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 731 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 01:31:27,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2023-04-03 01:31:27,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 475. [2023-04-03 01:31:27,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 324 states have (on average 1.376543209876543) internal successors, (446), 329 states have internal predecessors, (446), 92 states have call successors, (92), 57 states have call predecessors, (92), 58 states have return successors, (95), 88 states have call predecessors, (95), 91 states have call successors, (95) [2023-04-03 01:31:27,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 633 transitions. [2023-04-03 01:31:27,261 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 633 transitions. Word has length 95 [2023-04-03 01:31:27,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:31:27,262 INFO L495 AbstractCegarLoop]: Abstraction has 475 states and 633 transitions. [2023-04-03 01:31:27,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 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 01:31:27,262 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 633 transitions. [2023-04-03 01:31:27,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-04-03 01:31:27,263 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:31:27,263 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, 1, 1, 1, 1] [2023-04-03 01:31:27,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-03 01:31:27,263 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:31:27,264 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:31:27,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1605299006, now seen corresponding path program 1 times [2023-04-03 01:31:27,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:31:27,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042220738] [2023-04-03 01:31:27,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:31:27,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:31:27,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:31:27,637 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 01:31:27,638 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:31:27,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042220738] [2023-04-03 01:31:27,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042220738] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:31:27,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657189284] [2023-04-03 01:31:27,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:31:27,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:31:27,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:31:27,653 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 01:31:27,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-03 01:31:27,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:31:27,798 INFO L262 TraceCheckSpWp]: Trace formula consists of 937 conjuncts, 27 conjunts are in the unsatisfiable core [2023-04-03 01:31:27,801 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:31:28,675 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 01:31:28,675 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-03 01:31:30,556 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 8191 disjunctions. This might take some time... [2023-04-03 01:31:34,150 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 8191 disjunctions.