/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain EqDomain -i ../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.1.ufo.BOUNDED-10.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 12:19:02,233 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 12:19:02,235 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 12:19:02,275 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 12:19:02,276 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 12:19:02,278 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 12:19:02,281 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 12:19:02,283 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 12:19:02,284 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 12:19:02,288 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 12:19:02,290 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 12:19:02,291 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 12:19:02,292 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 12:19:02,294 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 12:19:02,294 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 12:19:02,298 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 12:19:02,298 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 12:19:02,299 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 12:19:02,301 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 12:19:02,305 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 12:19:02,306 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 12:19:02,307 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 12:19:02,308 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 12:19:02,309 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 12:19:02,316 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 12:19:02,316 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 12:19:02,317 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 12:19:02,318 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 12:19:02,318 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 12:19:02,319 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 12:19:02,319 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 12:19:02,319 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 12:19:02,320 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 12:19:02,321 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 12:19:02,322 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 12:19:02,322 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 12:19:02,322 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 12:19:02,322 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 12:19:02,322 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 12:19:02,323 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 12:19:02,324 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 12:19:02,324 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 12:19:02,346 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 12:19:02,346 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 12:19:02,346 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 12:19:02,346 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 12:19:02,347 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 12:19:02,347 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 12:19:02,347 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 12:19:02,347 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 12:19:02,347 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 12:19:02,347 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 12:19:02,347 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 12:19:02,348 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 12:19:02,348 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 12:19:02,348 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 12:19:02,348 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 12:19:02,348 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 12:19:02,348 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 12:19:02,348 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 12:19:02,349 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 12:19:02,349 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 12:19:02,349 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 12:19:02,349 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 12:19:02,349 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 12:19:02,349 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 12:19:02,349 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 12:19:02,350 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 12:19:02,350 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 12:19:02,350 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 12:19:02,350 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 12:19:02,350 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 12:19:02,350 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 12:19:02,350 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 12:19:02,350 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 12:19:02,351 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 12:19:02,351 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 12:19:02,351 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 12:19:02,351 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 12:19:02,351 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 12:19:02,351 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 12:19:02,351 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 12:19:02,351 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 12:19:02,351 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 12:19:02,556 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 12:19:02,589 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 12:19:02,591 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 12:19:02,593 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 12:19:02,594 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 12:19:02,595 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.1.ufo.BOUNDED-10.pals.c [2023-04-01 12:19:03,773 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 12:19:04,012 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 12:19:04,012 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.1.ufo.BOUNDED-10.pals.c [2023-04-01 12:19:04,028 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/96af7d624/49b29ab4200a4e8aad4220b946af6749/FLAGa009926cb [2023-04-01 12:19:04,040 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/96af7d624/49b29ab4200a4e8aad4220b946af6749 [2023-04-01 12:19:04,042 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 12:19:04,043 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 12:19:04,045 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 12:19:04,045 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 12:19:04,049 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 12:19:04,050 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:19:04" (1/1) ... [2023-04-01 12:19:04,051 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c27a04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:19:04, skipping insertion in model container [2023-04-01 12:19:04,051 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:19:04" (1/1) ... [2023-04-01 12:19:04,059 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 12:19:04,103 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 12:19:04,299 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.BOUNDED-10.pals.c[14700,14713] [2023-04-01 12:19:04,302 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 12:19:04,313 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 12:19:04,365 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.BOUNDED-10.pals.c[14700,14713] [2023-04-01 12:19:04,365 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 12:19:04,380 INFO L208 MainTranslator]: Completed translation [2023-04-01 12:19:04,381 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:19:04 WrapperNode [2023-04-01 12:19:04,381 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 12:19:04,382 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 12:19:04,382 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 12:19:04,382 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 12:19:04,403 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:19:04" (1/1) ... [2023-04-01 12:19:04,403 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:19:04" (1/1) ... [2023-04-01 12:19:04,429 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:19:04" (1/1) ... [2023-04-01 12:19:04,429 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:19:04" (1/1) ... [2023-04-01 12:19:04,444 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:19:04" (1/1) ... [2023-04-01 12:19:04,451 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:19:04" (1/1) ... [2023-04-01 12:19:04,455 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:19:04" (1/1) ... [2023-04-01 12:19:04,457 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:19:04" (1/1) ... [2023-04-01 12:19:04,462 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 12:19:04,463 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 12:19:04,463 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 12:19:04,463 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 12:19:04,464 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:19:04" (1/1) ... [2023-04-01 12:19:04,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 12:19:04,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:19:04,502 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 12:19:04,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 12:19:04,537 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 12:19:04,537 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 12:19:04,537 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 12:19:04,537 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 12:19:04,537 INFO L138 BoogieDeclarations]: Found implementation of procedure write_side1_failed_history [2023-04-01 12:19:04,537 INFO L138 BoogieDeclarations]: Found implementation of procedure read_side1_failed_history [2023-04-01 12:19:04,538 INFO L138 BoogieDeclarations]: Found implementation of procedure write_side2_failed_history [2023-04-01 12:19:04,538 INFO L138 BoogieDeclarations]: Found implementation of procedure read_side2_failed_history [2023-04-01 12:19:04,538 INFO L138 BoogieDeclarations]: Found implementation of procedure write_active_side_history [2023-04-01 12:19:04,538 INFO L138 BoogieDeclarations]: Found implementation of procedure read_active_side_history [2023-04-01 12:19:04,538 INFO L138 BoogieDeclarations]: Found implementation of procedure write_manual_selection_history [2023-04-01 12:19:04,538 INFO L138 BoogieDeclarations]: Found implementation of procedure read_manual_selection_history [2023-04-01 12:19:04,538 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2023-04-01 12:19:04,538 INFO L138 BoogieDeclarations]: Found implementation of procedure flip_the_side [2023-04-01 12:19:04,539 INFO L138 BoogieDeclarations]: Found implementation of procedure Console_task_each_pals_period [2023-04-01 12:19:04,539 INFO L138 BoogieDeclarations]: Found implementation of procedure Side1_activestandby_task_each_pals_period [2023-04-01 12:19:04,539 INFO L138 BoogieDeclarations]: Found implementation of procedure Side2_activestandby_task_each_pals_period [2023-04-01 12:19:04,539 INFO L138 BoogieDeclarations]: Found implementation of procedure Pendulum_prism_task_each_pals_period [2023-04-01 12:19:04,539 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2023-04-01 12:19:04,539 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 12:19:04,539 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2023-04-01 12:19:04,540 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 12:19:04,540 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 12:19:04,540 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 12:19:04,540 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 12:19:04,540 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-01 12:19:04,540 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-01 12:19:04,540 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-01 12:19:04,541 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-01 12:19:04,541 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-01 12:19:04,541 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 12:19:04,541 INFO L130 BoogieDeclarations]: Found specification of procedure write_side1_failed_history [2023-04-01 12:19:04,541 INFO L130 BoogieDeclarations]: Found specification of procedure read_side1_failed_history [2023-04-01 12:19:04,541 INFO L130 BoogieDeclarations]: Found specification of procedure write_side2_failed_history [2023-04-01 12:19:04,541 INFO L130 BoogieDeclarations]: Found specification of procedure read_side2_failed_history [2023-04-01 12:19:04,542 INFO L130 BoogieDeclarations]: Found specification of procedure write_active_side_history [2023-04-01 12:19:04,542 INFO L130 BoogieDeclarations]: Found specification of procedure read_active_side_history [2023-04-01 12:19:04,542 INFO L130 BoogieDeclarations]: Found specification of procedure write_manual_selection_history [2023-04-01 12:19:04,542 INFO L130 BoogieDeclarations]: Found specification of procedure read_manual_selection_history [2023-04-01 12:19:04,542 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-01 12:19:04,542 INFO L130 BoogieDeclarations]: Found specification of procedure flip_the_side [2023-04-01 12:19:04,542 INFO L130 BoogieDeclarations]: Found specification of procedure Console_task_each_pals_period [2023-04-01 12:19:04,542 INFO L130 BoogieDeclarations]: Found specification of procedure Side1_activestandby_task_each_pals_period [2023-04-01 12:19:04,543 INFO L130 BoogieDeclarations]: Found specification of procedure Side2_activestandby_task_each_pals_period [2023-04-01 12:19:04,543 INFO L130 BoogieDeclarations]: Found specification of procedure Pendulum_prism_task_each_pals_period [2023-04-01 12:19:04,543 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-01 12:19:04,543 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 12:19:04,543 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 12:19:04,543 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 12:19:04,543 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 12:19:04,544 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 12:19:04,544 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 12:19:04,544 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 12:19:04,643 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 12:19:04,645 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 12:19:05,243 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 12:19:05,387 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 12:19:05,387 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 12:19:05,390 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:19:05 BoogieIcfgContainer [2023-04-01 12:19:05,391 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 12:19:05,395 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 12:19:05,396 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 12:19:05,399 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 12:19:05,399 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 12:19:04" (1/3) ... [2023-04-01 12:19:05,399 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1160da8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:19:05, skipping insertion in model container [2023-04-01 12:19:05,400 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:19:04" (2/3) ... [2023-04-01 12:19:05,400 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1160da8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:19:05, skipping insertion in model container [2023-04-01 12:19:05,400 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:19:05" (3/3) ... [2023-04-01 12:19:05,401 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_STARTPALS_ActiveStandby.1.ufo.BOUNDED-10.pals.c [2023-04-01 12:19:05,417 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 12:19:05,418 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 12:19:05,488 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 12:19:05,494 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;@68139339, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 12:19:05,495 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 12:19:05,500 INFO L276 IsEmpty]: Start isEmpty. Operand has 190 states, 126 states have (on average 1.4682539682539681) internal successors, (185), 127 states have internal predecessors, (185), 43 states have call successors, (43), 19 states have call predecessors, (43), 19 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2023-04-01 12:19:05,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-04-01 12:19:05,510 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:19:05,511 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:19:05,512 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:19:05,518 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:19:05,519 INFO L85 PathProgramCache]: Analyzing trace with hash -327406355, now seen corresponding path program 1 times [2023-04-01 12:19:05,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:19:05,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447012987] [2023-04-01 12:19:05,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:19:05,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:19:05,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:19:06,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:19:06,205 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:19:06,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447012987] [2023-04-01 12:19:06,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447012987] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:19:06,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:19:06,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 12:19:06,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109681894] [2023-04-01 12:19:06,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:19:06,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 12:19:06,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:19:06,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 12:19:06,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 12:19:06,260 INFO L87 Difference]: Start difference. First operand has 190 states, 126 states have (on average 1.4682539682539681) internal successors, (185), 127 states have internal predecessors, (185), 43 states have call successors, (43), 19 states have call predecessors, (43), 19 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) [2023-04-01 12:19:06,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:19:06,446 INFO L93 Difference]: Finished difference Result 373 states and 563 transitions. [2023-04-01 12:19:06,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 12:19:06,450 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) Word has length 48 [2023-04-01 12:19:06,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:19:06,459 INFO L225 Difference]: With dead ends: 373 [2023-04-01 12:19:06,459 INFO L226 Difference]: Without dead ends: 191 [2023-04-01 12:19:06,465 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 12:19:06,469 INFO L413 NwaCegarLoop]: 252 mSDtfsCounter, 5 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 746 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:19:06,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 746 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:19:06,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2023-04-01 12:19:06,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2023-04-01 12:19:06,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 128 states have (on average 1.4453125) internal successors, (185), 128 states have internal predecessors, (185), 43 states have call successors, (43), 20 states have call predecessors, (43), 19 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2023-04-01 12:19:06,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 270 transitions. [2023-04-01 12:19:06,524 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 270 transitions. Word has length 48 [2023-04-01 12:19:06,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:19:06,524 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 270 transitions. [2023-04-01 12:19:06,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) [2023-04-01 12:19:06,525 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 270 transitions. [2023-04-01 12:19:06,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-04-01 12:19:06,527 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:19:06,528 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:19:06,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 12:19:06,528 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:19:06,529 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:19:06,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1229930792, now seen corresponding path program 1 times [2023-04-01 12:19:06,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:19:06,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561505749] [2023-04-01 12:19:06,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:19:06,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:19:06,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:19:07,361 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 12:19:07,361 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:19:07,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561505749] [2023-04-01 12:19:07,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561505749] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 12:19:07,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414877810] [2023-04-01 12:19:07,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:19:07,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 12:19:07,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:19:07,366 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 12:19:07,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 12:19:07,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:19:07,601 INFO L262 TraceCheckSpWp]: Trace formula consists of 848 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 12:19:07,612 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 12:19:07,795 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:19:07,795 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 12:19:07,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414877810] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:19:07,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 12:19:07,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 15 [2023-04-01 12:19:07,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103339652] [2023-04-01 12:19:07,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:19:07,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 12:19:07,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:19:07,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 12:19:07,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2023-04-01 12:19:07,805 INFO L87 Difference]: Start difference. First operand 191 states and 270 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 6 states have call successors, (17), 5 states have call predecessors, (17), 5 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) [2023-04-01 12:19:08,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:19:08,735 INFO L93 Difference]: Finished difference Result 430 states and 607 transitions. [2023-04-01 12:19:08,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 12:19:08,736 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 6 states have call successors, (17), 5 states have call predecessors, (17), 5 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) Word has length 66 [2023-04-01 12:19:08,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:19:08,744 INFO L225 Difference]: With dead ends: 430 [2023-04-01 12:19:08,744 INFO L226 Difference]: Without dead ends: 250 [2023-04-01 12:19:08,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2023-04-01 12:19:08,747 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 507 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 1001 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 514 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 1207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 1001 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-01 12:19:08,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [514 Valid, 66 Invalid, 1207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 1001 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-01 12:19:08,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2023-04-01 12:19:08,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 245. [2023-04-01 12:19:08,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 162 states have (on average 1.4382716049382716) internal successors, (233), 164 states have internal predecessors, (233), 54 states have call successors, (54), 29 states have call predecessors, (54), 28 states have return successors, (54), 51 states have call predecessors, (54), 53 states have call successors, (54) [2023-04-01 12:19:08,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 341 transitions. [2023-04-01 12:19:08,774 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 341 transitions. Word has length 66 [2023-04-01 12:19:08,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:19:08,775 INFO L495 AbstractCegarLoop]: Abstraction has 245 states and 341 transitions. [2023-04-01 12:19:08,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 6 states have call successors, (17), 5 states have call predecessors, (17), 5 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) [2023-04-01 12:19:08,775 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 341 transitions. [2023-04-01 12:19:08,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-04-01 12:19:08,777 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:19:08,777 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:19:08,802 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 12:19:08,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 12:19:08,983 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:19:08,983 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:19:08,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1539548420, now seen corresponding path program 1 times [2023-04-01 12:19:08,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:19:08,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999865218] [2023-04-01 12:19:08,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:19:08,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:19:09,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:19:09,653 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 12:19:09,655 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:19:09,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999865218] [2023-04-01 12:19:09,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999865218] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 12:19:09,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842782470] [2023-04-01 12:19:09,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:19:09,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 12:19:09,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:19:09,659 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 12:19:09,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 12:19:09,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:19:09,866 INFO L262 TraceCheckSpWp]: Trace formula consists of 849 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 12:19:09,875 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 12:19:10,035 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:19:10,036 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 12:19:10,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842782470] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:19:10,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 12:19:10,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 15 [2023-04-01 12:19:10,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219645437] [2023-04-01 12:19:10,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:19:10,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 12:19:10,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:19:10,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 12:19:10,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2023-04-01 12:19:10,038 INFO L87 Difference]: Start difference. First operand 245 states and 341 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 6 states have call successors, (17), 5 states have call predecessors, (17), 5 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) [2023-04-01 12:19:10,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:19:10,833 INFO L93 Difference]: Finished difference Result 432 states and 609 transitions. [2023-04-01 12:19:10,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 12:19:10,833 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 6 states have call successors, (17), 5 states have call predecessors, (17), 5 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) Word has length 67 [2023-04-01 12:19:10,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:19:10,837 INFO L225 Difference]: With dead ends: 432 [2023-04-01 12:19:10,837 INFO L226 Difference]: Without dead ends: 249 [2023-04-01 12:19:10,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2023-04-01 12:19:10,839 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 496 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 999 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 502 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 1191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 999 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-01 12:19:10,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [502 Valid, 74 Invalid, 1191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 999 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-01 12:19:10,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2023-04-01 12:19:10,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 245. [2023-04-01 12:19:10,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 162 states have (on average 1.4382716049382716) internal successors, (233), 164 states have internal predecessors, (233), 54 states have call successors, (54), 29 states have call predecessors, (54), 28 states have return successors, (54), 51 states have call predecessors, (54), 53 states have call successors, (54) [2023-04-01 12:19:10,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 341 transitions. [2023-04-01 12:19:10,874 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 341 transitions. Word has length 67 [2023-04-01 12:19:10,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:19:10,875 INFO L495 AbstractCegarLoop]: Abstraction has 245 states and 341 transitions. [2023-04-01 12:19:10,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 6 states have call successors, (17), 5 states have call predecessors, (17), 5 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) [2023-04-01 12:19:10,875 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 341 transitions. [2023-04-01 12:19:10,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-04-01 12:19:10,876 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:19:10,876 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:19:10,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 12:19:11,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-04-01 12:19:11,084 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:19:11,085 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:19:11,085 INFO L85 PathProgramCache]: Analyzing trace with hash -377193149, now seen corresponding path program 1 times [2023-04-01 12:19:11,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:19:11,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324828949] [2023-04-01 12:19:11,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:19:11,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:19:11,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:19:11,749 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 12:19:11,750 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:19:11,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324828949] [2023-04-01 12:19:11,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324828949] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 12:19:11,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916442678] [2023-04-01 12:19:11,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:19:11,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 12:19:11,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:19:11,768 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 12:19:11,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 12:19:11,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:19:11,949 INFO L262 TraceCheckSpWp]: Trace formula consists of 848 conjuncts, 13 conjunts are in the unsatisfiable core [2023-04-01 12:19:11,952 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 12:19:12,139 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 12:19:12,139 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 12:19:12,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916442678] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:19:12,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 12:19:12,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2023-04-01 12:19:12,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477328704] [2023-04-01 12:19:12,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:19:12,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 12:19:12,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:19:12,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 12:19:12,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-04-01 12:19:12,142 INFO L87 Difference]: Start difference. First operand 245 states and 341 transitions. Second operand has 8 states, 6 states have (on average 6.5) internal successors, (39), 8 states have internal predecessors, (39), 5 states have call successors, (17), 4 states have call predecessors, (17), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2023-04-01 12:19:12,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:19:12,451 INFO L93 Difference]: Finished difference Result 664 states and 927 transitions. [2023-04-01 12:19:12,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 12:19:12,452 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 6.5) internal successors, (39), 8 states have internal predecessors, (39), 5 states have call successors, (17), 4 states have call predecessors, (17), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 69 [2023-04-01 12:19:12,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:19:12,457 INFO L225 Difference]: With dead ends: 664 [2023-04-01 12:19:12,457 INFO L226 Difference]: Without dead ends: 443 [2023-04-01 12:19:12,458 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2023-04-01 12:19:12,460 INFO L413 NwaCegarLoop]: 260 mSDtfsCounter, 241 mSDsluCounter, 1103 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 1363 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 12:19:12,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [242 Valid, 1363 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 12:19:12,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2023-04-01 12:19:12,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 430. [2023-04-01 12:19:12,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 287 states have (on average 1.4390243902439024) internal successors, (413), 292 states have internal predecessors, (413), 94 states have call successors, (94), 47 states have call predecessors, (94), 48 states have return successors, (97), 90 states have call predecessors, (97), 93 states have call successors, (97) [2023-04-01 12:19:12,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 604 transitions. [2023-04-01 12:19:12,557 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 604 transitions. Word has length 69 [2023-04-01 12:19:12,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:19:12,557 INFO L495 AbstractCegarLoop]: Abstraction has 430 states and 604 transitions. [2023-04-01 12:19:12,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 6.5) internal successors, (39), 8 states have internal predecessors, (39), 5 states have call successors, (17), 4 states have call predecessors, (17), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2023-04-01 12:19:12,558 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 604 transitions. [2023-04-01 12:19:12,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-04-01 12:19:12,564 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:19:12,564 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:19:12,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 12:19:12,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 12:19:12,774 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:19:12,774 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:19:12,774 INFO L85 PathProgramCache]: Analyzing trace with hash 482839559, now seen corresponding path program 1 times [2023-04-01 12:19:12,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:19:12,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080054447] [2023-04-01 12:19:12,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:19:12,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:19:12,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:19:13,377 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 12:19:13,377 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:19:13,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080054447] [2023-04-01 12:19:13,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080054447] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 12:19:13,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452656922] [2023-04-01 12:19:13,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:19:13,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 12:19:13,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:19:13,379 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 12:19:13,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 12:19:13,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:19:13,587 INFO L262 TraceCheckSpWp]: Trace formula consists of 865 conjuncts, 16 conjunts are in the unsatisfiable core [2023-04-01 12:19:13,591 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 12:19:13,678 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:19:13,678 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 12:19:13,810 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 12:19:13,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452656922] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-01 12:19:13,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-01 12:19:13,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 6] total 15 [2023-04-01 12:19:13,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720487300] [2023-04-01 12:19:13,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:19:13,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 12:19:13,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:19:13,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 12:19:13,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2023-04-01 12:19:13,813 INFO L87 Difference]: Start difference. First operand 430 states and 604 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) [2023-04-01 12:19:13,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:19:13,942 INFO L93 Difference]: Finished difference Result 774 states and 1106 transitions. [2023-04-01 12:19:13,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 12:19:13,942 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 [2023-04-01 12:19:13,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:19:13,947 INFO L225 Difference]: With dead ends: 774 [2023-04-01 12:19:13,947 INFO L226 Difference]: Without dead ends: 434 [2023-04-01 12:19:13,948 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 [2023-04-01 12:19:13,949 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 14 mSDsluCounter, 729 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 975 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 [2023-04-01 12:19:13,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 975 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:19:13,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2023-04-01 12:19:13,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 426. [2023-04-01 12:19:13,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 285 states have (on average 1.4350877192982456) internal successors, (409), 290 states have internal predecessors, (409), 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) [2023-04-01 12:19:13,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 596 transitions. [2023-04-01 12:19:13,993 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 596 transitions. Word has length 71 [2023-04-01 12:19:13,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:19:13,995 INFO L495 AbstractCegarLoop]: Abstraction has 426 states and 596 transitions. [2023-04-01 12:19:13,995 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) [2023-04-01 12:19:13,995 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 596 transitions. [2023-04-01 12:19:13,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-04-01 12:19:13,996 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:19:13,996 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] [2023-04-01 12:19:14,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 12:19:14,203 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 [2023-04-01 12:19:14,204 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:19:14,204 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:19:14,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1903035337, now seen corresponding path program 1 times [2023-04-01 12:19:14,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:19:14,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712046554] [2023-04-01 12:19:14,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:19:14,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:19:14,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:19:14,695 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 12:19:14,696 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:19:14,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712046554] [2023-04-01 12:19:14,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712046554] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 12:19:14,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364612070] [2023-04-01 12:19:14,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:19:14,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 12:19:14,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:19:14,698 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) [2023-04-01 12:19:14,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 12:19:14,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:19:14,893 INFO L262 TraceCheckSpWp]: Trace formula consists of 884 conjuncts, 10 conjunts are in the unsatisfiable core [2023-04-01 12:19:14,896 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 12:19:14,912 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 12:19:14,912 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 12:19:14,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364612070] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:19:14,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 12:19:14,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 8 [2023-04-01 12:19:14,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41979007] [2023-04-01 12:19:14,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:19:14,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 12:19:14,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:19:14,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 12:19:14,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-04-01 12:19:14,917 INFO L87 Difference]: Start difference. First operand 426 states and 596 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) [2023-04-01 12:19:14,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:19:14,989 INFO L93 Difference]: Finished difference Result 766 states and 1086 transitions. [2023-04-01 12:19:14,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 12:19:14,989 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 [2023-04-01 12:19:14,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:19:14,992 INFO L225 Difference]: With dead ends: 766 [2023-04-01 12:19:14,992 INFO L226 Difference]: Without dead ends: 426 [2023-04-01 12:19:14,994 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 [2023-04-01 12:19:14,995 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 7 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 728 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 [2023-04-01 12:19:14,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 728 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:19:14,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2023-04-01 12:19:15,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 426. [2023-04-01 12:19:15,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 285 states have (on average 1.4280701754385965) internal successors, (407), 290 states have internal predecessors, (407), 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) [2023-04-01 12:19:15,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 594 transitions. [2023-04-01 12:19:15,032 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 594 transitions. Word has length 78 [2023-04-01 12:19:15,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:19:15,032 INFO L495 AbstractCegarLoop]: Abstraction has 426 states and 594 transitions. [2023-04-01 12:19:15,033 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) [2023-04-01 12:19:15,033 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 594 transitions. [2023-04-01 12:19:15,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-04-01 12:19:15,034 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:19:15,034 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] [2023-04-01 12:19:15,046 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 12:19:15,247 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 [2023-04-01 12:19:15,247 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:19:15,247 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:19:15,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1717293283, now seen corresponding path program 1 times [2023-04-01 12:19:15,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:19:15,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578941124] [2023-04-01 12:19:15,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:19:15,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:19:15,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:19:15,837 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 12:19:15,837 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:19:15,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578941124] [2023-04-01 12:19:15,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578941124] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 12:19:15,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316004472] [2023-04-01 12:19:15,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:19:15,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 12:19:15,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:19:15,841 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) [2023-04-01 12:19:15,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 12:19:16,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:19:16,031 INFO L262 TraceCheckSpWp]: Trace formula consists of 885 conjuncts, 11 conjunts are in the unsatisfiable core [2023-04-01 12:19:16,034 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 12:19:16,086 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 12:19:16,086 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 12:19:16,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316004472] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:19:16,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 12:19:16,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 11 [2023-04-01 12:19:16,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883538392] [2023-04-01 12:19:16,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:19:16,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 12:19:16,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:19:16,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 12:19:16,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2023-04-01 12:19:16,089 INFO L87 Difference]: Start difference. First operand 426 states and 594 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) [2023-04-01 12:19:16,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:19:16,214 INFO L93 Difference]: Finished difference Result 782 states and 1110 transitions. [2023-04-01 12:19:16,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 12:19:16,214 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 [2023-04-01 12:19:16,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:19:16,218 INFO L225 Difference]: With dead ends: 782 [2023-04-01 12:19:16,218 INFO L226 Difference]: Without dead ends: 446 [2023-04-01 12:19:16,220 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 [2023-04-01 12:19:16,221 INFO L413 NwaCegarLoop]: 237 mSDtfsCounter, 14 mSDsluCounter, 934 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 1171 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 [2023-04-01 12:19:16,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 1171 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:19:16,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2023-04-01 12:19:16,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 446. [2023-04-01 12:19:16,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 301 states have (on average 1.4053156146179402) internal successors, (423), 306 states have internal predecessors, (423), 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) [2023-04-01 12:19:16,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 610 transitions. [2023-04-01 12:19:16,262 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 610 transitions. Word has length 79 [2023-04-01 12:19:16,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:19:16,263 INFO L495 AbstractCegarLoop]: Abstraction has 446 states and 610 transitions. [2023-04-01 12:19:16,263 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) [2023-04-01 12:19:16,263 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 610 transitions. [2023-04-01 12:19:16,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-04-01 12:19:16,266 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:19:16,266 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] [2023-04-01 12:19:16,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-01 12:19:16,480 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 [2023-04-01 12:19:16,480 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:19:16,481 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:19:16,481 INFO L85 PathProgramCache]: Analyzing trace with hash 32371437, now seen corresponding path program 1 times [2023-04-01 12:19:16,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:19:16,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741101569] [2023-04-01 12:19:16,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:19:16,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:19:16,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:19:16,665 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 12:19:16,665 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:19:16,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741101569] [2023-04-01 12:19:16,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741101569] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:19:16,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:19:16,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 12:19:16,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213820237] [2023-04-01 12:19:16,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:19:16,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 12:19:16,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:19:16,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 12:19:16,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 12:19:16,668 INFO L87 Difference]: Start difference. First operand 446 states and 610 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) [2023-04-01 12:19:16,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:19:16,736 INFO L93 Difference]: Finished difference Result 810 states and 1120 transitions. [2023-04-01 12:19:16,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 12:19:16,737 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 [2023-04-01 12:19:16,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:19:16,740 INFO L225 Difference]: With dead ends: 810 [2023-04-01 12:19:16,740 INFO L226 Difference]: Without dead ends: 454 [2023-04-01 12:19:16,742 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 [2023-04-01 12:19:16,742 INFO L413 NwaCegarLoop]: 249 mSDtfsCounter, 5 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 732 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 [2023-04-01 12:19:16,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 732 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:19:16,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2023-04-01 12:19:16,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 454. [2023-04-01 12:19:16,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 307 states have (on average 1.3973941368078175) internal successors, (429), 312 states have internal predecessors, (429), 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) [2023-04-01 12:19:16,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 616 transitions. [2023-04-01 12:19:16,773 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 616 transitions. Word has length 87 [2023-04-01 12:19:16,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:19:16,773 INFO L495 AbstractCegarLoop]: Abstraction has 454 states and 616 transitions. [2023-04-01 12:19:16,773 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) [2023-04-01 12:19:16,773 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 616 transitions. [2023-04-01 12:19:16,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-04-01 12:19:16,776 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:19:16,777 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] [2023-04-01 12:19:16,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-01 12:19:16,777 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:19:16,777 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:19:16,777 INFO L85 PathProgramCache]: Analyzing trace with hash 178888331, now seen corresponding path program 1 times [2023-04-01 12:19:16,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:19:16,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528468769] [2023-04-01 12:19:16,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:19:16,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:19:16,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:19:17,367 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 12:19:17,367 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:19:17,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528468769] [2023-04-01 12:19:17,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528468769] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 12:19:17,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409076290] [2023-04-01 12:19:17,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:19:17,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 12:19:17,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:19:17,369 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) [2023-04-01 12:19:17,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 12:19:17,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:19:17,575 INFO L262 TraceCheckSpWp]: Trace formula consists of 901 conjuncts, 11 conjunts are in the unsatisfiable core [2023-04-01 12:19:17,578 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 12:19:17,633 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 12:19:17,633 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 12:19:17,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409076290] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:19:17,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 12:19:17,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 11 [2023-04-01 12:19:17,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248063404] [2023-04-01 12:19:17,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:19:17,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 12:19:17,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:19:17,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 12:19:17,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2023-04-01 12:19:17,637 INFO L87 Difference]: Start difference. First operand 454 states and 616 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) [2023-04-01 12:19:17,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:19:17,762 INFO L93 Difference]: Finished difference Result 828 states and 1140 transitions. [2023-04-01 12:19:17,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 12:19:17,763 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 [2023-04-01 12:19:17,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:19:17,766 INFO L225 Difference]: With dead ends: 828 [2023-04-01 12:19:17,766 INFO L226 Difference]: Without dead ends: 464 [2023-04-01 12:19:17,768 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 [2023-04-01 12:19:17,770 INFO L413 NwaCegarLoop]: 237 mSDtfsCounter, 14 mSDsluCounter, 934 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 1171 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 [2023-04-01 12:19:17,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 1171 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:19:17,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2023-04-01 12:19:17,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 464. [2023-04-01 12:19:17,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 315 states have (on average 1.3873015873015873) internal successors, (437), 320 states have internal predecessors, (437), 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) [2023-04-01 12:19:17,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 624 transitions. [2023-04-01 12:19:17,802 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 624 transitions. Word has length 87 [2023-04-01 12:19:17,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:19:17,802 INFO L495 AbstractCegarLoop]: Abstraction has 464 states and 624 transitions. [2023-04-01 12:19:17,802 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) [2023-04-01 12:19:17,802 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 624 transitions. [2023-04-01 12:19:17,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-04-01 12:19:17,804 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:19:17,804 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] [2023-04-01 12:19:17,815 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-01 12:19:18,014 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 [2023-04-01 12:19:18,015 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:19:18,015 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:19:18,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1853869837, now seen corresponding path program 1 times [2023-04-01 12:19:18,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:19:18,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449966307] [2023-04-01 12:19:18,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:19:18,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:19:18,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:19:18,212 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-01 12:19:18,213 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:19:18,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449966307] [2023-04-01 12:19:18,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449966307] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:19:18,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:19:18,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 12:19:18,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635420119] [2023-04-01 12:19:18,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:19:18,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 12:19:18,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:19:18,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 12:19:18,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 12:19:18,214 INFO L87 Difference]: Start difference. First operand 464 states and 624 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) [2023-04-01 12:19:18,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:19:18,288 INFO L93 Difference]: Finished difference Result 850 states and 1154 transitions. [2023-04-01 12:19:18,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 12:19:18,289 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 [2023-04-01 12:19:18,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:19:18,292 INFO L225 Difference]: With dead ends: 850 [2023-04-01 12:19:18,292 INFO L226 Difference]: Without dead ends: 476 [2023-04-01 12:19:18,294 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 [2023-04-01 12:19:18,294 INFO L413 NwaCegarLoop]: 248 mSDtfsCounter, 7 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 734 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 [2023-04-01 12:19:18,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 734 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:19:18,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2023-04-01 12:19:18,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 476. [2023-04-01 12:19:18,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 325 states have (on average 1.3753846153846154) internal successors, (447), 330 states have internal predecessors, (447), 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) [2023-04-01 12:19:18,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 634 transitions. [2023-04-01 12:19:18,327 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 634 transitions. Word has length 95 [2023-04-01 12:19:18,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:19:18,328 INFO L495 AbstractCegarLoop]: Abstraction has 476 states and 634 transitions. [2023-04-01 12:19:18,328 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) [2023-04-01 12:19:18,328 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 634 transitions. [2023-04-01 12:19:18,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-04-01 12:19:18,329 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:19:18,329 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] [2023-04-01 12:19:18,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-01 12:19:18,330 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:19:18,330 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:19:18,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1875677509, now seen corresponding path program 1 times [2023-04-01 12:19:18,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:19:18,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520868639] [2023-04-01 12:19:18,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:19:18,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:19:18,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:19:18,834 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 12:19:18,834 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:19:18,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520868639] [2023-04-01 12:19:18,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520868639] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 12:19:18,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031828261] [2023-04-01 12:19:18,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:19:18,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 12:19:18,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:19:18,837 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) [2023-04-01 12:19:18,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 12:19:19,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:19:19,028 INFO L262 TraceCheckSpWp]: Trace formula consists of 937 conjuncts, 27 conjunts are in the unsatisfiable core [2023-04-01 12:19:19,033 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 12:19:20,148 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:19:20,148 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 12:19:22,219 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 8191 disjunctions. This might take some time... [2023-04-01 12:19:25,594 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 8191 disjunctions.