/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/systemc/token_ring.04.cil-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-03 01:23:29,365 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-03 01:23:29,367 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-03 01:23:29,411 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-03 01:23:29,411 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-03 01:23:29,412 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-03 01:23:29,413 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-03 01:23:29,415 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-03 01:23:29,419 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-03 01:23:29,423 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-03 01:23:29,424 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-03 01:23:29,426 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-03 01:23:29,426 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-03 01:23:29,428 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-03 01:23:29,429 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-03 01:23:29,431 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-03 01:23:29,432 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-03 01:23:29,432 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-03 01:23:29,435 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-03 01:23:29,439 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-03 01:23:29,440 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-03 01:23:29,441 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-03 01:23:29,442 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-03 01:23:29,443 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-03 01:23:29,450 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-03 01:23:29,450 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-03 01:23:29,451 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-03 01:23:29,452 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-03 01:23:29,452 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-03 01:23:29,453 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-03 01:23:29,453 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-03 01:23:29,453 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-03 01:23:29,455 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-03 01:23:29,455 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-03 01:23:29,456 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-03 01:23:29,456 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-03 01:23:29,456 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-03 01:23:29,457 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-03 01:23:29,457 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-03 01:23:29,457 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-03 01:23:29,458 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-03 01:23:29,459 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-03 01:23:29,484 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-03 01:23:29,484 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-03 01:23:29,484 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-03 01:23:29,484 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-03 01:23:29,485 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-03 01:23:29,485 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-03 01:23:29,485 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-03 01:23:29,485 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-03 01:23:29,486 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-03 01:23:29,486 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-03 01:23:29,486 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-03 01:23:29,486 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-03 01:23:29,486 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-03 01:23:29,486 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-03 01:23:29,486 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-03 01:23:29,486 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-03 01:23:29,487 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-03 01:23:29,487 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-03 01:23:29,487 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-03 01:23:29,487 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-03 01:23:29,487 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-03 01:23:29,488 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-03 01:23:29,488 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-03 01:23:29,488 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-03 01:23:29,488 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-03 01:23:29,488 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-03 01:23:29,488 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-03 01:23:29,488 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-03 01:23:29,488 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-03 01:23:29,489 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-03 01:23:29,489 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-03 01:23:29,489 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-03 01:23:29,489 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 01:23:29,489 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-03 01:23:29,489 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-03 01:23:29,490 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-03 01:23:29,490 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-03 01:23:29,490 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-03 01:23:29,490 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-03 01:23:29,490 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-03 01:23:29,490 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-03 01:23:29,490 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-03 01:23:29,717 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-03 01:23:29,735 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-03 01:23:29,737 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-03 01:23:29,738 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-03 01:23:29,738 INFO L275 PluginConnector]: CDTParser initialized [2023-04-03 01:23:29,739 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/systemc/token_ring.04.cil-2.c [2023-04-03 01:23:30,890 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-03 01:23:31,070 INFO L351 CDTParser]: Found 1 translation units. [2023-04-03 01:23:31,071 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/systemc/token_ring.04.cil-2.c [2023-04-03 01:23:31,080 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5afb629ba/85f713a2daaf4651a580e6128f6020db/FLAGa93c643ca [2023-04-03 01:23:31,097 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5afb629ba/85f713a2daaf4651a580e6128f6020db [2023-04-03 01:23:31,099 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-03 01:23:31,101 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-03 01:23:31,104 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-03 01:23:31,104 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-03 01:23:31,107 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-03 01:23:31,109 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 01:23:31" (1/1) ... [2023-04-03 01:23:31,110 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5dd60b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:23:31, skipping insertion in model container [2023-04-03 01:23:31,110 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 01:23:31" (1/1) ... [2023-04-03 01:23:31,115 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-03 01:23:31,158 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-03 01:23:31,300 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/systemc/token_ring.04.cil-2.c[671,684] [2023-04-03 01:23:31,363 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 01:23:31,378 INFO L203 MainTranslator]: Completed pre-run [2023-04-03 01:23:31,388 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/systemc/token_ring.04.cil-2.c[671,684] [2023-04-03 01:23:31,417 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 01:23:31,431 INFO L208 MainTranslator]: Completed translation [2023-04-03 01:23:31,432 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:23:31 WrapperNode [2023-04-03 01:23:31,432 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-03 01:23:31,433 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-03 01:23:31,433 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-03 01:23:31,433 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-03 01:23:31,443 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:23:31" (1/1) ... [2023-04-03 01:23:31,443 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:23:31" (1/1) ... [2023-04-03 01:23:31,462 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:23:31" (1/1) ... [2023-04-03 01:23:31,463 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:23:31" (1/1) ... [2023-04-03 01:23:31,493 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:23:31" (1/1) ... [2023-04-03 01:23:31,503 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:23:31" (1/1) ... [2023-04-03 01:23:31,505 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:23:31" (1/1) ... [2023-04-03 01:23:31,506 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:23:31" (1/1) ... [2023-04-03 01:23:31,526 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-03 01:23:31,527 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-03 01:23:31,527 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-03 01:23:31,527 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-03 01:23:31,528 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:23:31" (1/1) ... [2023-04-03 01:23:31,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 01:23:31,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:23:31,558 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-03 01:23:31,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-03 01:23:31,598 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-03 01:23:31,598 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-03 01:23:31,598 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-03 01:23:31,598 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2023-04-03 01:23:31,599 INFO L138 BoogieDeclarations]: Found implementation of procedure master [2023-04-03 01:23:31,600 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit1 [2023-04-03 01:23:31,600 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit2 [2023-04-03 01:23:31,600 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit3 [2023-04-03 01:23:31,600 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit4 [2023-04-03 01:23:31,600 INFO L138 BoogieDeclarations]: Found implementation of procedure is_master_triggered [2023-04-03 01:23:31,600 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit1_triggered [2023-04-03 01:23:31,600 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit2_triggered [2023-04-03 01:23:31,600 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit3_triggered [2023-04-03 01:23:31,600 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit4_triggered [2023-04-03 01:23:31,601 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-04-03 01:23:31,601 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2023-04-03 01:23:31,601 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-04-03 01:23:31,601 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2023-04-03 01:23:31,601 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-04-03 01:23:31,601 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-04-03 01:23:31,601 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-04-03 01:23:31,601 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-04-03 01:23:31,602 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_time_events [2023-04-03 01:23:31,602 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_time_events [2023-04-03 01:23:31,602 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2023-04-03 01:23:31,602 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2023-04-03 01:23:31,602 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2023-04-03 01:23:31,602 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-03 01:23:31,602 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-03 01:23:31,602 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-03 01:23:31,602 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-03 01:23:31,603 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-03 01:23:31,603 INFO L130 BoogieDeclarations]: Found specification of procedure error [2023-04-03 01:23:31,603 INFO L130 BoogieDeclarations]: Found specification of procedure is_master_triggered [2023-04-03 01:23:31,603 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit1_triggered [2023-04-03 01:23:31,603 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit2_triggered [2023-04-03 01:23:31,603 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit3_triggered [2023-04-03 01:23:31,603 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit4_triggered [2023-04-03 01:23:31,603 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-04-03 01:23:31,603 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-03 01:23:31,604 INFO L130 BoogieDeclarations]: Found specification of procedure master [2023-04-03 01:23:31,604 INFO L130 BoogieDeclarations]: Found specification of procedure transmit1 [2023-04-03 01:23:31,604 INFO L130 BoogieDeclarations]: Found specification of procedure transmit2 [2023-04-03 01:23:31,604 INFO L130 BoogieDeclarations]: Found specification of procedure transmit3 [2023-04-03 01:23:31,605 INFO L130 BoogieDeclarations]: Found specification of procedure transmit4 [2023-04-03 01:23:31,605 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-04-03 01:23:31,606 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2023-04-03 01:23:31,606 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-04-03 01:23:31,606 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2023-04-03 01:23:31,606 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-04-03 01:23:31,606 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-04-03 01:23:31,606 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-04-03 01:23:31,607 INFO L130 BoogieDeclarations]: Found specification of procedure fire_time_events [2023-04-03 01:23:31,607 INFO L130 BoogieDeclarations]: Found specification of procedure reset_time_events [2023-04-03 01:23:31,607 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2023-04-03 01:23:31,607 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2023-04-03 01:23:31,608 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2023-04-03 01:23:31,608 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-03 01:23:31,608 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-03 01:23:31,608 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-03 01:23:31,609 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-03 01:23:31,609 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-03 01:23:31,609 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-03 01:23:31,609 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-03 01:23:31,726 INFO L236 CfgBuilder]: Building ICFG [2023-04-03 01:23:31,728 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-03 01:23:32,202 INFO L277 CfgBuilder]: Performing block encoding [2023-04-03 01:23:32,427 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-03 01:23:32,428 INFO L302 CfgBuilder]: Removed 7 assume(true) statements. [2023-04-03 01:23:32,430 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 01:23:32 BoogieIcfgContainer [2023-04-03 01:23:32,431 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-03 01:23:32,434 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-03 01:23:32,434 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-03 01:23:32,436 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-03 01:23:32,437 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.04 01:23:31" (1/3) ... [2023-04-03 01:23:32,437 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45705acd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 01:23:32, skipping insertion in model container [2023-04-03 01:23:32,438 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:23:31" (2/3) ... [2023-04-03 01:23:32,438 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45705acd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 01:23:32, skipping insertion in model container [2023-04-03 01:23:32,438 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 01:23:32" (3/3) ... [2023-04-03 01:23:32,441 INFO L112 eAbstractionObserver]: Analyzing ICFG token_ring.04.cil-2.c [2023-04-03 01:23:32,455 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-03 01:23:32,455 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-03 01:23:32,517 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-03 01:23:32,523 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;@290fcefc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-03 01:23:32,524 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-03 01:23:32,528 INFO L276 IsEmpty]: Start isEmpty. Operand has 164 states, 97 states have (on average 1.422680412371134) internal successors, (138), 107 states have internal predecessors, (138), 39 states have call successors, (39), 26 states have call predecessors, (39), 26 states have return successors, (39), 38 states have call predecessors, (39), 39 states have call successors, (39) [2023-04-03 01:23:32,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-04-03 01:23:32,540 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:23:32,541 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:23:32,542 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:23:32,548 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:23:32,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1132905536, now seen corresponding path program 1 times [2023-04-03 01:23:32,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:23:32,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049240450] [2023-04-03 01:23:32,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:23:32,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:23:32,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:23:33,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 01:23:33,318 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:23:33,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049240450] [2023-04-03 01:23:33,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049240450] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:23:33,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:23:33,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-03 01:23:33,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211483722] [2023-04-03 01:23:33,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:23:33,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-03 01:23:33,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:23:33,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-03 01:23:33,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-03 01:23:33,364 INFO L87 Difference]: Start difference. First operand has 164 states, 97 states have (on average 1.422680412371134) internal successors, (138), 107 states have internal predecessors, (138), 39 states have call successors, (39), 26 states have call predecessors, (39), 26 states have return successors, (39), 38 states have call predecessors, (39), 39 states have call successors, (39) Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 5 states have call successors, (18), 3 states have call predecessors, (18), 5 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) [2023-04-03 01:23:34,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:23:34,627 INFO L93 Difference]: Finished difference Result 1231 states and 1856 transitions. [2023-04-03 01:23:34,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-03 01:23:34,630 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 5 states have call successors, (18), 3 states have call predecessors, (18), 5 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) Word has length 78 [2023-04-03 01:23:34,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:23:34,648 INFO L225 Difference]: With dead ends: 1231 [2023-04-03 01:23:34,648 INFO L226 Difference]: Without dead ends: 1035 [2023-04-03 01:23:34,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-04-03 01:23:34,656 INFO L413 NwaCegarLoop]: 450 mSDtfsCounter, 1410 mSDsluCounter, 639 mSDsCounter, 0 mSdLazyCounter, 868 mSolverCounterSat, 636 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1424 SdHoareTripleChecker+Valid, 1089 SdHoareTripleChecker+Invalid, 1504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 636 IncrementalHoareTripleChecker+Valid, 868 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-04-03 01:23:34,657 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1424 Valid, 1089 Invalid, 1504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [636 Valid, 868 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-03 01:23:34,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1035 states. [2023-04-03 01:23:34,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1035 to 1015. [2023-04-03 01:23:34,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1015 states, 639 states have (on average 1.3599374021909234) internal successors, (869), 684 states have internal predecessors, (869), 225 states have call successors, (225), 162 states have call predecessors, (225), 150 states have return successors, (348), 207 states have call predecessors, (348), 221 states have call successors, (348) [2023-04-03 01:23:34,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1015 states to 1015 states and 1442 transitions. [2023-04-03 01:23:34,800 INFO L78 Accepts]: Start accepts. Automaton has 1015 states and 1442 transitions. Word has length 78 [2023-04-03 01:23:34,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:23:34,800 INFO L495 AbstractCegarLoop]: Abstraction has 1015 states and 1442 transitions. [2023-04-03 01:23:34,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 5 states have call successors, (18), 3 states have call predecessors, (18), 5 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) [2023-04-03 01:23:34,801 INFO L276 IsEmpty]: Start isEmpty. Operand 1015 states and 1442 transitions. [2023-04-03 01:23:34,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-04-03 01:23:34,807 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:23:34,807 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-03 01:23:34,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-03 01:23:34,808 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:23:34,808 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:23:34,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1420951122, now seen corresponding path program 1 times [2023-04-03 01:23:34,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:23:34,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580835569] [2023-04-03 01:23:34,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:23:34,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:23:34,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:23:35,102 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-04-03 01:23:35,102 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:23:35,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580835569] [2023-04-03 01:23:35,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580835569] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:23:35,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169190428] [2023-04-03 01:23:35,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:23:35,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:23:35,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:23:35,113 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 01:23:35,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-03 01:23:35,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:23:35,313 INFO L262 TraceCheckSpWp]: Trace formula consists of 1025 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-03 01:23:35,321 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:23:35,399 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-04-03 01:23:35,399 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 01:23:35,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169190428] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:23:35,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 01:23:35,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-03 01:23:35,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098219525] [2023-04-03 01:23:35,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:23:35,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 01:23:35,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:23:35,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 01:23:35,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-03 01:23:35,404 INFO L87 Difference]: Start difference. First operand 1015 states and 1442 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2023-04-03 01:23:35,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:23:35,527 INFO L93 Difference]: Finished difference Result 2132 states and 3154 transitions. [2023-04-03 01:23:35,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 01:23:35,527 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 138 [2023-04-03 01:23:35,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:23:35,538 INFO L225 Difference]: With dead ends: 2132 [2023-04-03 01:23:35,539 INFO L226 Difference]: Without dead ends: 1260 [2023-04-03 01:23:35,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-03 01:23:35,544 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 68 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 01:23:35,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 422 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 01:23:35,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1260 states. [2023-04-03 01:23:35,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1260 to 1197. [2023-04-03 01:23:35,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1197 states, 759 states have (on average 1.3926218708827405) internal successors, (1057), 828 states have internal predecessors, (1057), 259 states have call successors, (259), 190 states have call predecessors, (259), 178 states have return successors, (453), 230 states have call predecessors, (453), 255 states have call successors, (453) [2023-04-03 01:23:35,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1197 states to 1197 states and 1769 transitions. [2023-04-03 01:23:35,672 INFO L78 Accepts]: Start accepts. Automaton has 1197 states and 1769 transitions. Word has length 138 [2023-04-03 01:23:35,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:23:35,674 INFO L495 AbstractCegarLoop]: Abstraction has 1197 states and 1769 transitions. [2023-04-03 01:23:35,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2023-04-03 01:23:35,675 INFO L276 IsEmpty]: Start isEmpty. Operand 1197 states and 1769 transitions. [2023-04-03 01:23:35,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2023-04-03 01:23:35,680 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:23:35,680 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-03 01:23:35,693 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-03 01:23:35,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:23:35,881 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:23:35,881 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:23:35,882 INFO L85 PathProgramCache]: Analyzing trace with hash -1527020778, now seen corresponding path program 1 times [2023-04-03 01:23:35,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:23:35,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806300845] [2023-04-03 01:23:35,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:23:35,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:23:35,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:23:36,230 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 2 proven. 31 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-04-03 01:23:36,231 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:23:36,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806300845] [2023-04-03 01:23:36,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806300845] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:23:36,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076166713] [2023-04-03 01:23:36,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:23:36,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:23:36,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:23:36,236 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 01:23:36,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-03 01:23:36,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:23:36,453 INFO L262 TraceCheckSpWp]: Trace formula consists of 1210 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-03 01:23:36,460 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:23:36,554 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-04-03 01:23:36,554 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 01:23:36,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076166713] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:23:36,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 01:23:36,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-03 01:23:36,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742487795] [2023-04-03 01:23:36,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:23:36,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 01:23:36,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:23:36,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 01:23:36,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-03 01:23:36,557 INFO L87 Difference]: Start difference. First operand 1197 states and 1769 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 3 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (23), 2 states have call predecessors, (23), 3 states have call successors, (23) [2023-04-03 01:23:36,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:23:36,763 INFO L93 Difference]: Finished difference Result 3520 states and 5522 transitions. [2023-04-03 01:23:36,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 01:23:36,764 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 3 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (23), 2 states have call predecessors, (23), 3 states have call successors, (23) Word has length 186 [2023-04-03 01:23:36,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:23:36,779 INFO L225 Difference]: With dead ends: 3520 [2023-04-03 01:23:36,779 INFO L226 Difference]: Without dead ends: 2339 [2023-04-03 01:23:36,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-03 01:23:36,790 INFO L413 NwaCegarLoop]: 220 mSDtfsCounter, 144 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 01:23:36,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 372 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 01:23:36,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2339 states. [2023-04-03 01:23:36,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2339 to 2323. [2023-04-03 01:23:36,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2323 states, 1484 states have (on average 1.3827493261455526) internal successors, (2052), 1606 states have internal predecessors, (2052), 497 states have call successors, (497), 374 states have call predecessors, (497), 341 states have return successors, (905), 433 states have call predecessors, (905), 493 states have call successors, (905) [2023-04-03 01:23:36,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2323 states to 2323 states and 3454 transitions. [2023-04-03 01:23:36,964 INFO L78 Accepts]: Start accepts. Automaton has 2323 states and 3454 transitions. Word has length 186 [2023-04-03 01:23:36,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:23:36,966 INFO L495 AbstractCegarLoop]: Abstraction has 2323 states and 3454 transitions. [2023-04-03 01:23:36,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 3 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (23), 2 states have call predecessors, (23), 3 states have call successors, (23) [2023-04-03 01:23:36,967 INFO L276 IsEmpty]: Start isEmpty. Operand 2323 states and 3454 transitions. [2023-04-03 01:23:36,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2023-04-03 01:23:36,975 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:23:36,976 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-03 01:23:36,985 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-04-03 01:23:37,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-04-03 01:23:37,184 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:23:37,185 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:23:37,185 INFO L85 PathProgramCache]: Analyzing trace with hash 964102575, now seen corresponding path program 1 times [2023-04-03 01:23:37,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:23:37,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967299464] [2023-04-03 01:23:37,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:23:37,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:23:37,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:23:37,450 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2023-04-03 01:23:37,450 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:23:37,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967299464] [2023-04-03 01:23:37,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967299464] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:23:37,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:23:37,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 01:23:37,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408748066] [2023-04-03 01:23:37,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:23:37,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 01:23:37,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:23:37,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 01:23:37,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 01:23:37,459 INFO L87 Difference]: Start difference. First operand 2323 states and 3454 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 4 states have call successors, (24), 4 states have call predecessors, (24), 3 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2023-04-03 01:23:38,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:23:38,584 INFO L93 Difference]: Finished difference Result 9454 states and 16460 transitions. [2023-04-03 01:23:38,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-03 01:23:38,585 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 4 states have call successors, (24), 4 states have call predecessors, (24), 3 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) Word has length 186 [2023-04-03 01:23:38,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:23:38,638 INFO L225 Difference]: With dead ends: 9454 [2023-04-03 01:23:38,638 INFO L226 Difference]: Without dead ends: 7147 [2023-04-03 01:23:38,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-04-03 01:23:38,662 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 478 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 738 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 502 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-03 01:23:38,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [502 Valid, 327 Invalid, 923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 738 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-03 01:23:38,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7147 states. [2023-04-03 01:23:39,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7147 to 7051. [2023-04-03 01:23:39,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7051 states, 4660 states have (on average 1.4390557939914164) internal successors, (6706), 5202 states have internal predecessors, (6706), 1501 states have call successors, (1501), 990 states have call predecessors, (1501), 889 states have return successors, (3682), 1189 states have call predecessors, (3682), 1497 states have call successors, (3682) [2023-04-03 01:23:39,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7051 states to 7051 states and 11889 transitions. [2023-04-03 01:23:39,238 INFO L78 Accepts]: Start accepts. Automaton has 7051 states and 11889 transitions. Word has length 186 [2023-04-03 01:23:39,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:23:39,238 INFO L495 AbstractCegarLoop]: Abstraction has 7051 states and 11889 transitions. [2023-04-03 01:23:39,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 4 states have call successors, (24), 4 states have call predecessors, (24), 3 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2023-04-03 01:23:39,238 INFO L276 IsEmpty]: Start isEmpty. Operand 7051 states and 11889 transitions. [2023-04-03 01:23:39,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2023-04-03 01:23:39,250 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:23:39,250 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-03 01:23:39,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-03 01:23:39,251 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:23:39,251 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:23:39,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1104998679, now seen corresponding path program 1 times [2023-04-03 01:23:39,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:23:39,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55193067] [2023-04-03 01:23:39,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:23:39,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:23:39,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:23:39,547 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2023-04-03 01:23:39,547 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:23:39,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55193067] [2023-04-03 01:23:39,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55193067] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:23:39,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:23:39,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 01:23:39,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696169931] [2023-04-03 01:23:39,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:23:39,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 01:23:39,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:23:39,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 01:23:39,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 01:23:39,549 INFO L87 Difference]: Start difference. First operand 7051 states and 11889 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 4 states have call successors, (24), 4 states have call predecessors, (24), 3 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2023-04-03 01:23:41,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:23:41,728 INFO L93 Difference]: Finished difference Result 30248 states and 61437 transitions. [2023-04-03 01:23:41,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-03 01:23:41,730 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 4 states have call successors, (24), 4 states have call predecessors, (24), 3 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) Word has length 186 [2023-04-03 01:23:41,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:23:41,936 INFO L225 Difference]: With dead ends: 30248 [2023-04-03 01:23:41,936 INFO L226 Difference]: Without dead ends: 23213 [2023-04-03 01:23:42,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-04-03 01:23:42,098 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 449 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 799 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-03 01:23:42,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [472 Valid, 402 Invalid, 971 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 799 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-03 01:23:42,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23213 states. [2023-04-03 01:23:44,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23213 to 22965. [2023-04-03 01:23:44,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22965 states, 15506 states have (on average 1.4999355088352895) internal successors, (23258), 18024 states have internal predecessors, (23258), 5092 states have call successors, (5092), 2608 states have call predecessors, (5092), 2366 states have return successors, (16676), 3522 states have call predecessors, (16676), 5088 states have call successors, (16676) [2023-04-03 01:23:44,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22965 states to 22965 states and 45026 transitions. [2023-04-03 01:23:44,517 INFO L78 Accepts]: Start accepts. Automaton has 22965 states and 45026 transitions. Word has length 186 [2023-04-03 01:23:44,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:23:44,519 INFO L495 AbstractCegarLoop]: Abstraction has 22965 states and 45026 transitions. [2023-04-03 01:23:44,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 4 states have call successors, (24), 4 states have call predecessors, (24), 3 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2023-04-03 01:23:44,520 INFO L276 IsEmpty]: Start isEmpty. Operand 22965 states and 45026 transitions. [2023-04-03 01:23:44,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2023-04-03 01:23:44,567 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:23:44,567 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-03 01:23:44,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-03 01:23:44,568 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:23:44,568 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:23:44,569 INFO L85 PathProgramCache]: Analyzing trace with hash -991167082, now seen corresponding path program 1 times [2023-04-03 01:23:44,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:23:44,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413814786] [2023-04-03 01:23:44,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:23:44,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:23:44,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:23:44,779 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 24 proven. 4 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2023-04-03 01:23:44,779 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:23:44,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413814786] [2023-04-03 01:23:44,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413814786] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:23:44,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073080994] [2023-04-03 01:23:44,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:23:44,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:23:44,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:23:44,781 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 01:23:44,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-03 01:23:45,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:23:45,014 INFO L262 TraceCheckSpWp]: Trace formula consists of 1266 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-03 01:23:45,021 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:23:45,053 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 109 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-04-03 01:23:45,053 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 01:23:45,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073080994] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:23:45,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 01:23:45,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2023-04-03 01:23:45,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291029383] [2023-04-03 01:23:45,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:23:45,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 01:23:45,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:23:45,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 01:23:45,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-04-03 01:23:45,055 INFO L87 Difference]: Start difference. First operand 22965 states and 45026 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 3 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) [2023-04-03 01:23:47,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:23:47,079 INFO L93 Difference]: Finished difference Result 45253 states and 94865 transitions. [2023-04-03 01:23:47,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 01:23:47,080 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 3 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) Word has length 202 [2023-04-03 01:23:47,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:23:47,312 INFO L225 Difference]: With dead ends: 45253 [2023-04-03 01:23:47,312 INFO L226 Difference]: Without dead ends: 28771 [2023-04-03 01:23:47,486 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-04-03 01:23:47,487 INFO L413 NwaCegarLoop]: 243 mSDtfsCounter, 89 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 01:23:47,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 419 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 01:23:47,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28771 states. [2023-04-03 01:23:49,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28771 to 28673. [2023-04-03 01:23:49,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28673 states, 19478 states have (on average 1.5032857582914056) internal successors, (29281), 22785 states have internal predecessors, (29281), 6321 states have call successors, (6321), 3190 states have call predecessors, (6321), 2873 states have return successors, (23093), 4156 states have call predecessors, (23093), 6317 states have call successors, (23093) [2023-04-03 01:23:50,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28673 states to 28673 states and 58695 transitions. [2023-04-03 01:23:50,149 INFO L78 Accepts]: Start accepts. Automaton has 28673 states and 58695 transitions. Word has length 202 [2023-04-03 01:23:50,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:23:50,150 INFO L495 AbstractCegarLoop]: Abstraction has 28673 states and 58695 transitions. [2023-04-03 01:23:50,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 3 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) [2023-04-03 01:23:50,150 INFO L276 IsEmpty]: Start isEmpty. Operand 28673 states and 58695 transitions. [2023-04-03 01:23:50,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2023-04-03 01:23:50,199 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:23:50,199 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-03 01:23:50,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-03 01:23:50,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:23:50,408 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:23:50,408 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:23:50,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1797829018, now seen corresponding path program 1 times [2023-04-03 01:23:50,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:23:50,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550402656] [2023-04-03 01:23:50,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:23:50,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:23:50,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:23:50,922 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 21 proven. 7 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2023-04-03 01:23:50,922 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:23:50,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550402656] [2023-04-03 01:23:50,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550402656] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:23:50,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259973820] [2023-04-03 01:23:50,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:23:50,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:23:50,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:23:50,925 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 01:23:50,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-03 01:23:51,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:23:51,158 INFO L262 TraceCheckSpWp]: Trace formula consists of 1269 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-03 01:23:51,163 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:23:51,199 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-04-03 01:23:51,199 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 01:23:51,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259973820] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:23:51,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 01:23:51,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2023-04-03 01:23:51,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456338103] [2023-04-03 01:23:51,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:23:51,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 01:23:51,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:23:51,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 01:23:51,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-04-03 01:23:51,203 INFO L87 Difference]: Start difference. First operand 28673 states and 58695 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 3 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) [2023-04-03 01:23:53,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:23:53,704 INFO L93 Difference]: Finished difference Result 55155 states and 116744 transitions. [2023-04-03 01:23:53,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 01:23:53,705 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 3 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) Word has length 202 [2023-04-03 01:23:53,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:23:53,971 INFO L225 Difference]: With dead ends: 55155 [2023-04-03 01:23:53,972 INFO L226 Difference]: Without dead ends: 39739 [2023-04-03 01:23:54,201 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-04-03 01:23:54,202 INFO L413 NwaCegarLoop]: 287 mSDtfsCounter, 119 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 01:23:54,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 467 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 01:23:54,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39739 states. [2023-04-03 01:23:56,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39739 to 34641. [2023-04-03 01:23:56,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34641 states, 24085 states have (on average 1.521029686526884) internal successors, (36634), 28043 states have internal predecessors, (36634), 7343 states have call successors, (7343), 3546 states have call predecessors, (7343), 3212 states have return successors, (26796), 4892 states have call predecessors, (26796), 7339 states have call successors, (26796) [2023-04-03 01:23:57,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34641 states to 34641 states and 70773 transitions. [2023-04-03 01:23:57,307 INFO L78 Accepts]: Start accepts. Automaton has 34641 states and 70773 transitions. Word has length 202 [2023-04-03 01:23:57,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:23:57,307 INFO L495 AbstractCegarLoop]: Abstraction has 34641 states and 70773 transitions. [2023-04-03 01:23:57,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 3 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) [2023-04-03 01:23:57,308 INFO L276 IsEmpty]: Start isEmpty. Operand 34641 states and 70773 transitions. [2023-04-03 01:23:57,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2023-04-03 01:23:57,384 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:23:57,384 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-03 01:23:57,394 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-03 01:23:57,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:23:57,591 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:23:57,592 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:23:57,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1418618365, now seen corresponding path program 1 times [2023-04-03 01:23:57,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:23:57,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072925768] [2023-04-03 01:23:57,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:23:57,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:23:57,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:23:58,278 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 29 proven. 46 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2023-04-03 01:23:58,278 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:23:58,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072925768] [2023-04-03 01:23:58,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072925768] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:23:58,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544402488] [2023-04-03 01:23:58,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:23:58,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:23:58,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:23:58,281 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 01:23:58,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-03 01:23:58,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:23:58,556 INFO L262 TraceCheckSpWp]: Trace formula consists of 1620 conjuncts, 13 conjunts are in the unsatisfiable core [2023-04-03 01:23:58,563 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:23:58,732 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 159 proven. 4 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2023-04-03 01:23:58,733 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-03 01:23:59,168 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2023-04-03 01:23:59,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544402488] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-03 01:23:59,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1659396860] [2023-04-03 01:23:59,193 INFO L159 IcfgInterpreter]: Started Sifa with 119 locations of interest [2023-04-03 01:23:59,194 INFO L166 IcfgInterpreter]: Building call graph [2023-04-03 01:23:59,198 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-03 01:23:59,203 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-03 01:23:59,203 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-03 01:23:59,708 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 88 for LOIs [2023-04-03 01:23:59,764 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 118 for LOIs [2023-04-03 01:24:00,420 INFO L197 IcfgInterpreter]: Interpreting procedure init_model with input of size 74 for LOIs [2023-04-03 01:24:00,449 INFO L197 IcfgInterpreter]: Interpreting procedure start_simulation with input of size 108 for LOIs [2023-04-03 01:24:04,473 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2023-04-03 01:24:05,524 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2023-04-03 01:24:12,214 WARN L223 SmtUtils]: Spent 5.79s on a formula simplification. DAG size of input: 2861 DAG size of output: 90 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-04-03 01:24:27,593 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2023-04-03 01:24:28,318 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2023-04-03 01:24:39,663 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2023-04-03 01:24:40,424 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2023-04-03 01:24:43,215 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2023-04-03 01:24:43,867 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2023-04-03 01:24:49,640 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2023-04-03 01:24:50,163 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2023-04-03 01:24:52,765 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2023-04-03 01:24:53,334 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2023-04-03 01:25:09,124 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 96 for LOIs [2023-04-03 01:25:09,182 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 66 for LOIs [2023-04-03 01:25:09,196 INFO L197 IcfgInterpreter]: Interpreting procedure stop_simulation with input of size 29 for LOIs [2023-04-03 01:25:09,287 INFO L197 IcfgInterpreter]: Interpreting procedure eval with input of size 80 for LOIs [2023-04-03 01:25:12,056 INFO L197 IcfgInterpreter]: Interpreting procedure master with input of size 108 for LOIs [2023-04-03 01:25:12,809 INFO L197 IcfgInterpreter]: Interpreting procedure error with input of size 95 for LOIs [2023-04-03 01:25:12,850 INFO L197 IcfgInterpreter]: Interpreting procedure init_threads with input of size 74 for LOIs [2023-04-03 01:25:12,874 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 65 for LOIs [2023-04-03 01:25:12,909 INFO L197 IcfgInterpreter]: Interpreting procedure transmit4 with input of size 56 for LOIs [2023-04-03 01:25:13,139 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 19 for LOIs [2023-04-03 01:25:13,151 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 16 for LOIs [2023-04-03 01:25:13,170 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 16 for LOIs [2023-04-03 01:25:13,250 INFO L197 IcfgInterpreter]: Interpreting procedure is_transmit4_triggered with input of size 1 for LOIs [2023-04-03 01:25:13,253 INFO L197 IcfgInterpreter]: Interpreting procedure is_master_triggered with input of size 1 for LOIs [2023-04-03 01:25:13,256 INFO L197 IcfgInterpreter]: Interpreting procedure is_transmit1_triggered with input of size 16 for LOIs [2023-04-03 01:25:13,266 INFO L197 IcfgInterpreter]: Interpreting procedure is_transmit2_triggered with input of size 1 for LOIs [2023-04-03 01:25:13,267 INFO L197 IcfgInterpreter]: Interpreting procedure is_transmit3_triggered with input of size 1 for LOIs [2023-04-03 01:25:13,269 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-03 01:25:21,081 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '359313#(and (not (= ~token~0 (+ ~local~0 4))) (exists ((v_eval_~tmp_ndt_1~0_BEFORE_CALL_13 Int) (|v_old(~t1_pc~0)_BEFORE_CALL_82| Int) (|v_old(~t2_pc~0)_BEFORE_CALL_82| Int) (|v_old(~m_st~0)_BEFORE_CALL_67| Int) (|v_old(~E_3~0)_BEFORE_CALL_82| Int) (|v_old(~E_2~0)_BEFORE_CALL_82| Int) (|v_old(~t4_st~0)_BEFORE_CALL_65| Int) (|v_old(~m_pc~0)_BEFORE_CALL_65| Int) (|v_old(~t3_st~0)_BEFORE_CALL_65| Int) (v_eval_~tmp~0_BEFORE_CALL_29 Int) (|v_old(~token~0)_BEFORE_CALL_65| Int) (|v_old(~local~0)_BEFORE_CALL_65| Int) (|v_old(~t3_pc~0)_BEFORE_CALL_82| Int) (|v_old(~E_M~0)_BEFORE_CALL_67| Int) (|v_old(~E_1~0)_BEFORE_CALL_65| Int) (|v_old(~t4_pc~0)_BEFORE_CALL_67| Int) (|v_old(~t2_st~0)_BEFORE_CALL_65| Int) (|v_old(~E_4~0)_BEFORE_CALL_82| Int) (|v_old(~t1_st~0)_BEFORE_CALL_81| Int)) (and (or (and (<= 0 (+ v_eval_~tmp_ndt_1~0_BEFORE_CALL_13 2147483648)) (<= 1 |#StackHeapBarrier|) (= |v_old(~t4_pc~0)_BEFORE_CALL_67| ~t4_pc~0) (= ~t1_i~0 1) (= |v_old(~m_st~0)_BEFORE_CALL_67| 0) (= ~t4_st~0 |v_old(~t4_st~0)_BEFORE_CALL_65|) (= ~E_4~0 |v_old(~E_4~0)_BEFORE_CALL_82|) (= |v_old(~t3_pc~0)_BEFORE_CALL_82| ~t3_pc~0) (= ~m_i~0 1) (= |v_old(~t1_pc~0)_BEFORE_CALL_82| ~t1_pc~0) (= |v_old(~t3_st~0)_BEFORE_CALL_65| ~t3_st~0) (= |v_old(~t1_st~0)_BEFORE_CALL_81| ~t1_st~0) (= |v_old(~local~0)_BEFORE_CALL_65| ~local~0) (= |v_old(~E_1~0)_BEFORE_CALL_65| ~E_1~0) (= ~t2_i~0 1) (= |v_old(~t2_pc~0)_BEFORE_CALL_82| ~t2_pc~0) (= |v_old(~m_pc~0)_BEFORE_CALL_65| 1) (= |#NULL.offset| 0) (= |v_old(~t2_st~0)_BEFORE_CALL_65| ~t2_st~0) (<= v_eval_~tmp~0_BEFORE_CALL_29 1) (= |v_old(~token~0)_BEFORE_CALL_65| ~token~0) (= ~E_3~0 |v_old(~E_3~0)_BEFORE_CALL_82|) (= ~t3_i~0 1) (<= v_eval_~tmp~0_BEFORE_CALL_29 |#StackHeapBarrier|) (= ~t4_i~0 1) (<= v_eval_~tmp_ndt_1~0_BEFORE_CALL_13 2147483647) (= ~E_M~0 |v_old(~E_M~0)_BEFORE_CALL_67|) (<= 1 (+ |#StackHeapBarrier| v_eval_~tmp~0_BEFORE_CALL_29)) (<= 1 v_eval_~tmp~0_BEFORE_CALL_29) (= |#NULL.base| 0) (= |v_old(~E_2~0)_BEFORE_CALL_82| ~E_2~0)) (and (<= 0 (+ v_eval_~tmp_ndt_1~0_BEFORE_CALL_13 2147483648)) (<= 1 |#StackHeapBarrier|) (= ~t1_i~0 1) (= ~E_4~0 |v_old(~E_4~0)_BEFORE_CALL_82|) (= |v_old(~t3_pc~0)_BEFORE_CALL_82| ~t3_pc~0) (= ~m_i~0 1) (= |v_old(~t1_pc~0)_BEFORE_CALL_82| ~t1_pc~0) (= ~t2_i~0 1) (= |v_old(~t2_pc~0)_BEFORE_CALL_82| ~t2_pc~0) (= |#NULL.offset| 0) (<= v_eval_~tmp~0_BEFORE_CALL_29 1) (= ~E_3~0 |v_old(~E_3~0)_BEFORE_CALL_82|) (= ~t3_i~0 1) (<= v_eval_~tmp~0_BEFORE_CALL_29 |#StackHeapBarrier|) (= ~t4_i~0 1) (<= v_eval_~tmp_ndt_1~0_BEFORE_CALL_13 2147483647) (<= 1 (+ |#StackHeapBarrier| v_eval_~tmp~0_BEFORE_CALL_29)) (<= 1 v_eval_~tmp~0_BEFORE_CALL_29) (= |#NULL.base| 0) (= |v_old(~E_2~0)_BEFORE_CALL_82| ~E_2~0))) (not (= v_eval_~tmp_ndt_1~0_BEFORE_CALL_13 0)))) (= ~m_pc~0 1) (= ~m_st~0 1))' at error location [2023-04-03 01:25:21,082 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-03 01:25:21,082 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-03 01:25:21,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7] total 18 [2023-04-03 01:25:21,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802962177] [2023-04-03 01:25:21,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-03 01:25:21,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-04-03 01:25:21,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:25:21,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-04-03 01:25:21,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=706, Invalid=9194, Unknown=0, NotChecked=0, Total=9900 [2023-04-03 01:25:21,087 INFO L87 Difference]: Start difference. First operand 34641 states and 70773 transitions. Second operand has 18 states, 14 states have (on average 12.928571428571429) internal successors, (181), 17 states have internal predecessors, (181), 12 states have call successors, (83), 8 states have call predecessors, (83), 14 states have return successors, (78), 13 states have call predecessors, (78), 12 states have call successors, (78) [2023-04-03 01:25:54,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:25:54,815 INFO L93 Difference]: Finished difference Result 297408 states and 782253 transitions. [2023-04-03 01:25:54,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2023-04-03 01:25:54,816 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 14 states have (on average 12.928571428571429) internal successors, (181), 17 states have internal predecessors, (181), 12 states have call successors, (83), 8 states have call predecessors, (83), 14 states have return successors, (78), 13 states have call predecessors, (78), 12 states have call successors, (78) Word has length 276 [2023-04-03 01:25:54,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:25:58,308 INFO L225 Difference]: With dead ends: 297408 [2023-04-03 01:25:58,308 INFO L226 Difference]: Without dead ends: 262784 [2023-04-03 01:25:59,929 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 950 GetRequests, 749 SyntacticMatches, 17 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14042 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=2811, Invalid=31599, Unknown=0, NotChecked=0, Total=34410 [2023-04-03 01:25:59,930 INFO L413 NwaCegarLoop]: 522 mSDtfsCounter, 2770 mSDsluCounter, 3088 mSDsCounter, 0 mSdLazyCounter, 4250 mSolverCounterSat, 1746 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2770 SdHoareTripleChecker+Valid, 3610 SdHoareTripleChecker+Invalid, 5996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1746 IncrementalHoareTripleChecker+Valid, 4250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-04-03 01:25:59,930 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2770 Valid, 3610 Invalid, 5996 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1746 Valid, 4250 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-04-03 01:26:00,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262784 states. [2023-04-03 01:26:25,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262784 to 224734. [2023-04-03 01:26:25,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224734 states, 161157 states have (on average 1.530011107181196) internal successors, (246572), 190937 states have internal predecessors, (246572), 48734 states have call successors, (48734), 12555 states have call predecessors, (48734), 14842 states have return successors, (201631), 35900 states have call predecessors, (201631), 48730 states have call successors, (201631) [2023-04-03 01:26:31,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224734 states to 224734 states and 496937 transitions. [2023-04-03 01:26:31,947 INFO L78 Accepts]: Start accepts. Automaton has 224734 states and 496937 transitions. Word has length 276 [2023-04-03 01:26:31,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:26:31,948 INFO L495 AbstractCegarLoop]: Abstraction has 224734 states and 496937 transitions. [2023-04-03 01:26:31,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 14 states have (on average 12.928571428571429) internal successors, (181), 17 states have internal predecessors, (181), 12 states have call successors, (83), 8 states have call predecessors, (83), 14 states have return successors, (78), 13 states have call predecessors, (78), 12 states have call successors, (78) [2023-04-03 01:26:31,948 INFO L276 IsEmpty]: Start isEmpty. Operand 224734 states and 496937 transitions. [2023-04-03 01:26:32,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2023-04-03 01:26:32,155 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:26:32,155 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-03 01:26:32,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-03 01:26:32,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:26:32,365 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:26:32,366 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:26:32,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1834822245, now seen corresponding path program 1 times [2023-04-03 01:26:32,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:26:32,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364247273] [2023-04-03 01:26:32,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:26:32,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:26:32,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:26:32,769 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 18 proven. 28 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2023-04-03 01:26:32,769 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:26:32,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364247273] [2023-04-03 01:26:32,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364247273] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:26:32,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822484213] [2023-04-03 01:26:32,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:26:32,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:26:32,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:26:32,771 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 01:26:32,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-03 01:26:32,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:26:32,991 INFO L262 TraceCheckSpWp]: Trace formula consists of 1287 conjuncts, 13 conjunts are in the unsatisfiable core [2023-04-03 01:26:32,996 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:26:33,135 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-04-03 01:26:33,135 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 01:26:33,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822484213] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:26:33,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 01:26:33,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2023-04-03 01:26:33,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308488048] [2023-04-03 01:26:33,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:26:33,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-03 01:26:33,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:26:33,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-03 01:26:33,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2023-04-03 01:26:33,138 INFO L87 Difference]: Start difference. First operand 224734 states and 496937 transitions. Second operand has 7 states, 6 states have (on average 16.666666666666668) internal successors, (100), 7 states have internal predecessors, (100), 6 states have call successors, (28), 5 states have call predecessors, (28), 6 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24)