/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-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-03 01:23:16,374 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-03 01:23:16,375 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-03 01:23:16,403 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-03 01:23:16,404 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-03 01:23:16,404 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-03 01:23:16,405 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-03 01:23:16,406 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-03 01:23:16,407 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-03 01:23:16,407 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-03 01:23:16,408 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-03 01:23:16,409 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-03 01:23:16,409 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-03 01:23:16,409 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-03 01:23:16,410 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-03 01:23:16,413 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-03 01:23:16,414 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-03 01:23:16,414 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-03 01:23:16,415 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-03 01:23:16,416 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-03 01:23:16,417 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-03 01:23:16,420 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-03 01:23:16,421 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-03 01:23:16,423 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-03 01:23:16,428 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-03 01:23:16,428 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-03 01:23:16,428 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-03 01:23:16,428 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-03 01:23:16,429 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-03 01:23:16,429 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-03 01:23:16,429 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-03 01:23:16,430 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-03 01:23:16,430 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-03 01:23:16,431 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-03 01:23:16,431 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-03 01:23:16,431 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-03 01:23:16,432 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-03 01:23:16,432 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-03 01:23:16,432 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-03 01:23:16,432 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-03 01:23:16,433 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-03 01:23:16,433 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 01:23:16,446 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-03 01:23:16,447 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-03 01:23:16,447 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-03 01:23:16,447 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-03 01:23:16,447 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-03 01:23:16,447 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-03 01:23:16,448 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-03 01:23:16,448 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-03 01:23:16,448 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-03 01:23:16,448 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-03 01:23:16,448 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-03 01:23:16,448 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-03 01:23:16,448 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-03 01:23:16,451 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-03 01:23:16,452 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-03 01:23:16,452 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-03 01:23:16,452 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-03 01:23:16,452 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-03 01:23:16,452 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-03 01:23:16,452 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-03 01:23:16,452 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-03 01:23:16,452 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-03 01:23:16,453 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-03 01:23:16,453 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-03 01:23:16,453 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-03 01:23:16,453 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-03 01:23:16,453 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-03 01:23:16,453 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-03 01:23:16,454 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-03 01:23:16,454 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-03 01:23:16,454 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-03 01:23:16,454 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-03 01:23:16,454 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 01:23:16,454 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-03 01:23:16,454 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-03 01:23:16,454 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-03 01:23:16,455 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-03 01:23:16,455 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-03 01:23:16,455 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-03 01:23:16,455 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-03 01:23:16,455 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-03 01:23:16,455 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-03 01:23:16,614 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-03 01:23:16,632 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-03 01:23:16,634 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-03 01:23:16,634 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-03 01:23:16,635 INFO L275 PluginConnector]: CDTParser initialized [2023-04-03 01:23:16,636 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/systemc/token_ring.04.cil-1.c [2023-04-03 01:23:17,675 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-03 01:23:17,825 INFO L351 CDTParser]: Found 1 translation units. [2023-04-03 01:23:17,826 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/systemc/token_ring.04.cil-1.c [2023-04-03 01:23:17,833 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6741809a9/274561a8f7ce49f2ad08bff5b25aaf82/FLAG6f083ad43 [2023-04-03 01:23:17,843 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6741809a9/274561a8f7ce49f2ad08bff5b25aaf82 [2023-04-03 01:23:17,845 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-03 01:23:17,846 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-03 01:23:17,847 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-03 01:23:17,847 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-03 01:23:17,849 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-03 01:23:17,850 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 01:23:17" (1/1) ... [2023-04-03 01:23:17,850 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@530ecbfd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:23:17, skipping insertion in model container [2023-04-03 01:23:17,851 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 01:23:17" (1/1) ... [2023-04-03 01:23:17,856 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-03 01:23:17,883 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-03 01:23:17,979 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-1.c[671,684] [2023-04-03 01:23:18,037 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 01:23:18,045 INFO L203 MainTranslator]: Completed pre-run [2023-04-03 01:23:18,053 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-1.c[671,684] [2023-04-03 01:23:18,079 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 01:23:18,090 INFO L208 MainTranslator]: Completed translation [2023-04-03 01:23:18,090 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:23:18 WrapperNode [2023-04-03 01:23:18,090 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-03 01:23:18,091 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-03 01:23:18,091 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-03 01:23:18,091 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-03 01:23:18,099 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:23:18" (1/1) ... [2023-04-03 01:23:18,099 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:23:18" (1/1) ... [2023-04-03 01:23:18,104 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:23:18" (1/1) ... [2023-04-03 01:23:18,105 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:23:18" (1/1) ... [2023-04-03 01:23:18,112 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:23:18" (1/1) ... [2023-04-03 01:23:18,118 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:23:18" (1/1) ... [2023-04-03 01:23:18,120 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:23:18" (1/1) ... [2023-04-03 01:23:18,121 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:23:18" (1/1) ... [2023-04-03 01:23:18,123 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-03 01:23:18,124 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-03 01:23:18,124 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-03 01:23:18,124 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-03 01:23:18,124 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:23:18" (1/1) ... [2023-04-03 01:23:18,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 01:23:18,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:23:18,161 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 01:23:18,168 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 01:23:18,191 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-03 01:23:18,191 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-03 01:23:18,192 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-03 01:23:18,192 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2023-04-03 01:23:18,193 INFO L138 BoogieDeclarations]: Found implementation of procedure master [2023-04-03 01:23:18,193 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit1 [2023-04-03 01:23:18,193 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit2 [2023-04-03 01:23:18,193 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit3 [2023-04-03 01:23:18,193 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit4 [2023-04-03 01:23:18,193 INFO L138 BoogieDeclarations]: Found implementation of procedure is_master_triggered [2023-04-03 01:23:18,193 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit1_triggered [2023-04-03 01:23:18,193 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit2_triggered [2023-04-03 01:23:18,193 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit3_triggered [2023-04-03 01:23:18,193 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit4_triggered [2023-04-03 01:23:18,193 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-04-03 01:23:18,193 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2023-04-03 01:23:18,194 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-04-03 01:23:18,194 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2023-04-03 01:23:18,194 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-04-03 01:23:18,194 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-04-03 01:23:18,194 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-04-03 01:23:18,194 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-04-03 01:23:18,194 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_time_events [2023-04-03 01:23:18,194 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_time_events [2023-04-03 01:23:18,194 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2023-04-03 01:23:18,194 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2023-04-03 01:23:18,194 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2023-04-03 01:23:18,194 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-03 01:23:18,194 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-03 01:23:18,195 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-03 01:23:18,195 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-03 01:23:18,195 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-03 01:23:18,195 INFO L130 BoogieDeclarations]: Found specification of procedure error [2023-04-03 01:23:18,195 INFO L130 BoogieDeclarations]: Found specification of procedure is_master_triggered [2023-04-03 01:23:18,195 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit1_triggered [2023-04-03 01:23:18,195 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit2_triggered [2023-04-03 01:23:18,195 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit3_triggered [2023-04-03 01:23:18,195 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit4_triggered [2023-04-03 01:23:18,195 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-04-03 01:23:18,195 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-03 01:23:18,195 INFO L130 BoogieDeclarations]: Found specification of procedure master [2023-04-03 01:23:18,195 INFO L130 BoogieDeclarations]: Found specification of procedure transmit1 [2023-04-03 01:23:18,196 INFO L130 BoogieDeclarations]: Found specification of procedure transmit2 [2023-04-03 01:23:18,196 INFO L130 BoogieDeclarations]: Found specification of procedure transmit3 [2023-04-03 01:23:18,196 INFO L130 BoogieDeclarations]: Found specification of procedure transmit4 [2023-04-03 01:23:18,197 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-04-03 01:23:18,197 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2023-04-03 01:23:18,197 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-04-03 01:23:18,197 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2023-04-03 01:23:18,197 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-04-03 01:23:18,197 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-04-03 01:23:18,197 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-04-03 01:23:18,198 INFO L130 BoogieDeclarations]: Found specification of procedure fire_time_events [2023-04-03 01:23:18,198 INFO L130 BoogieDeclarations]: Found specification of procedure reset_time_events [2023-04-03 01:23:18,198 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2023-04-03 01:23:18,198 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2023-04-03 01:23:18,198 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2023-04-03 01:23:18,198 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-03 01:23:18,199 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-03 01:23:18,199 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-03 01:23:18,199 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-03 01:23:18,199 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-03 01:23:18,200 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-03 01:23:18,200 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-03 01:23:18,316 INFO L236 CfgBuilder]: Building ICFG [2023-04-03 01:23:18,318 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-03 01:23:18,735 INFO L277 CfgBuilder]: Performing block encoding [2023-04-03 01:23:18,882 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-03 01:23:18,882 INFO L302 CfgBuilder]: Removed 7 assume(true) statements. [2023-04-03 01:23:18,885 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 01:23:18 BoogieIcfgContainer [2023-04-03 01:23:18,885 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-03 01:23:18,905 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-03 01:23:18,906 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-03 01:23:18,909 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-03 01:23:18,909 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.04 01:23:17" (1/3) ... [2023-04-03 01:23:18,910 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32cc8a0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 01:23:18, skipping insertion in model container [2023-04-03 01:23:18,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:23:18" (2/3) ... [2023-04-03 01:23:18,910 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32cc8a0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 01:23:18, skipping insertion in model container [2023-04-03 01:23:18,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 01:23:18" (3/3) ... [2023-04-03 01:23:18,911 INFO L112 eAbstractionObserver]: Analyzing ICFG token_ring.04.cil-1.c [2023-04-03 01:23:18,924 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-03 01:23:18,924 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-03 01:23:18,969 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-03 01:23:18,975 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;@5b870118, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-03 01:23:18,975 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-03 01:23:18,981 INFO L276 IsEmpty]: Start isEmpty. Operand has 159 states, 93 states have (on average 1.4086021505376345) internal successors, (131), 102 states have internal predecessors, (131), 38 states have call successors, (38), 26 states have call predecessors, (38), 26 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2023-04-03 01:23:18,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-04-03 01:23:18,991 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:23:18,992 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] [2023-04-03 01:23:18,993 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:23:18,996 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:23:18,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1741572902, now seen corresponding path program 1 times [2023-04-03 01:23:19,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:23:19,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751927438] [2023-04-03 01:23:19,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:23:19,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:23:19,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:23:19,549 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 01:23:19,550 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:23:19,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751927438] [2023-04-03 01:23:19,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751927438] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:23:19,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:23:19,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-03 01:23:19,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703822622] [2023-04-03 01:23:19,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:23:19,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-03 01:23:19,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:23:19,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-03 01:23:19,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-03 01:23:19,590 INFO L87 Difference]: Start difference. First operand has 159 states, 93 states have (on average 1.4086021505376345) internal successors, (131), 102 states have internal predecessors, (131), 38 states have call successors, (38), 26 states have call predecessors, (38), 26 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) Second operand has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 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 01:23:20,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:23:20,643 INFO L93 Difference]: Finished difference Result 1206 states and 1815 transitions. [2023-04-03 01:23:20,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-03 01:23:20,646 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 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 77 [2023-04-03 01:23:20,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:23:20,669 INFO L225 Difference]: With dead ends: 1206 [2023-04-03 01:23:20,670 INFO L226 Difference]: Without dead ends: 1015 [2023-04-03 01:23:20,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-04-03 01:23:20,680 INFO L413 NwaCegarLoop]: 435 mSDtfsCounter, 1382 mSDsluCounter, 606 mSDsCounter, 0 mSdLazyCounter, 856 mSolverCounterSat, 643 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1399 SdHoareTripleChecker+Valid, 1041 SdHoareTripleChecker+Invalid, 1499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 643 IncrementalHoareTripleChecker+Valid, 856 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-03 01:23:20,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1399 Valid, 1041 Invalid, 1499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [643 Valid, 856 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-03 01:23:20,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1015 states. [2023-04-03 01:23:20,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1015 to 997. [2023-04-03 01:23:20,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 997 states, 622 states have (on average 1.355305466237942) internal successors, (843), 666 states have internal predecessors, (843), 224 states have call successors, (224), 162 states have call predecessors, (224), 150 states have return successors, (348), 207 states have call predecessors, (348), 221 states have call successors, (348) [2023-04-03 01:23:20,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 997 states to 997 states and 1415 transitions. [2023-04-03 01:23:20,791 INFO L78 Accepts]: Start accepts. Automaton has 997 states and 1415 transitions. Word has length 77 [2023-04-03 01:23:20,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:23:20,792 INFO L495 AbstractCegarLoop]: Abstraction has 997 states and 1415 transitions. [2023-04-03 01:23:20,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 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 01:23:20,792 INFO L276 IsEmpty]: Start isEmpty. Operand 997 states and 1415 transitions. [2023-04-03 01:23:20,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2023-04-03 01:23:20,797 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:23:20,797 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:23:20,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-03 01:23:20,797 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:23:20,798 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:23:20,798 INFO L85 PathProgramCache]: Analyzing trace with hash 649920739, now seen corresponding path program 1 times [2023-04-03 01:23:20,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:23:20,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8983345] [2023-04-03 01:23:20,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:23:20,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:23:20,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:23:21,044 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-04-03 01:23:21,045 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:23:21,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8983345] [2023-04-03 01:23:21,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8983345] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:23:21,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801505060] [2023-04-03 01:23:21,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:23:21,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:23:21,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:23:21,048 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 01:23:21,092 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 01:23:21,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:23:21,254 INFO L262 TraceCheckSpWp]: Trace formula consists of 1017 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-03 01:23:21,264 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:23:21,327 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-04-03 01:23:21,327 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 01:23:21,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801505060] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:23:21,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 01:23:21,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-03 01:23:21,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825755616] [2023-04-03 01:23:21,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:23:21,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 01:23:21,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:23:21,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 01:23:21,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-03 01:23:21,330 INFO L87 Difference]: Start difference. First operand 997 states and 1415 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 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 01:23:21,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:23:21,460 INFO L93 Difference]: Finished difference Result 2097 states and 3101 transitions. [2023-04-03 01:23:21,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 01:23:21,460 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 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 136 [2023-04-03 01:23:21,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:23:21,471 INFO L225 Difference]: With dead ends: 2097 [2023-04-03 01:23:21,472 INFO L226 Difference]: Without dead ends: 1242 [2023-04-03 01:23:21,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 138 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 01:23:21,479 INFO L413 NwaCegarLoop]: 237 mSDtfsCounter, 68 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 01:23:21,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 408 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 01:23:21,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1242 states. [2023-04-03 01:23:21,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1242 to 1179. [2023-04-03 01:23:21,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1179 states, 742 states have (on average 1.389487870619946) internal successors, (1031), 810 states have internal predecessors, (1031), 258 states have call successors, (258), 190 states have call predecessors, (258), 178 states have return successors, (453), 230 states have call predecessors, (453), 255 states have call successors, (453) [2023-04-03 01:23:21,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1179 states to 1179 states and 1742 transitions. [2023-04-03 01:23:21,573 INFO L78 Accepts]: Start accepts. Automaton has 1179 states and 1742 transitions. Word has length 136 [2023-04-03 01:23:21,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:23:21,574 INFO L495 AbstractCegarLoop]: Abstraction has 1179 states and 1742 transitions. [2023-04-03 01:23:21,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 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 01:23:21,574 INFO L276 IsEmpty]: Start isEmpty. Operand 1179 states and 1742 transitions. [2023-04-03 01:23:21,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2023-04-03 01:23:21,579 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:23:21,579 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:23:21,602 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 01:23:21,786 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 01:23:21,786 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:23:21,787 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:23:21,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1410936437, now seen corresponding path program 1 times [2023-04-03 01:23:21,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:23:21,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732260080] [2023-04-03 01:23:21,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:23:21,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:23:21,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:23:22,042 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-04-03 01:23:22,043 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:23:22,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732260080] [2023-04-03 01:23:22,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732260080] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:23:22,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094456758] [2023-04-03 01:23:22,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:23:22,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:23:22,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:23:22,049 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 01:23:22,072 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 01:23:22,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:23:22,246 INFO L262 TraceCheckSpWp]: Trace formula consists of 1202 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-03 01:23:22,258 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:23:22,345 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2023-04-03 01:23:22,345 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 01:23:22,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094456758] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:23:22,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 01:23:22,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-03 01:23:22,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120615411] [2023-04-03 01:23:22,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:23:22,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 01:23:22,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:23:22,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 01:23:22,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-03 01:23:22,347 INFO L87 Difference]: Start difference. First operand 1179 states and 1742 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 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 01:23:22,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:23:22,504 INFO L93 Difference]: Finished difference Result 3466 states and 5441 transitions. [2023-04-03 01:23:22,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 01:23:22,505 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 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 184 [2023-04-03 01:23:22,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:23:22,516 INFO L225 Difference]: With dead ends: 3466 [2023-04-03 01:23:22,517 INFO L226 Difference]: Without dead ends: 2303 [2023-04-03 01:23:22,524 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 186 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 01:23:22,525 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 136 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 01:23:22,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 352 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 01:23:22,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2303 states. [2023-04-03 01:23:22,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2303 to 2288. [2023-04-03 01:23:22,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2288 states, 1450 states have (on average 1.3793103448275863) internal successors, (2000), 1571 states have internal predecessors, (2000), 496 states have call successors, (496), 374 states have call predecessors, (496), 341 states have return successors, (905), 433 states have call predecessors, (905), 493 states have call successors, (905) [2023-04-03 01:23:22,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2288 states to 2288 states and 3401 transitions. [2023-04-03 01:23:22,692 INFO L78 Accepts]: Start accepts. Automaton has 2288 states and 3401 transitions. Word has length 184 [2023-04-03 01:23:22,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:23:22,692 INFO L495 AbstractCegarLoop]: Abstraction has 2288 states and 3401 transitions. [2023-04-03 01:23:22,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 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 01:23:22,693 INFO L276 IsEmpty]: Start isEmpty. Operand 2288 states and 3401 transitions. [2023-04-03 01:23:22,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2023-04-03 01:23:22,697 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:23:22,697 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:23:22,706 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-03 01:23:22,906 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 01:23:22,906 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:23:22,907 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:23:22,907 INFO L85 PathProgramCache]: Analyzing trace with hash -257863383, now seen corresponding path program 1 times [2023-04-03 01:23:22,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:23:22,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770045333] [2023-04-03 01:23:22,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:23:22,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:23:22,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:23:23,106 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2023-04-03 01:23:23,106 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:23:23,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770045333] [2023-04-03 01:23:23,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770045333] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:23:23,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:23:23,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 01:23:23,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130216730] [2023-04-03 01:23:23,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:23:23,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 01:23:23,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:23:23,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 01:23:23,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 01:23:23,108 INFO L87 Difference]: Start difference. First operand 2288 states and 3401 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 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 01:23:23,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:23:23,988 INFO L93 Difference]: Finished difference Result 9314 states and 16248 transitions. [2023-04-03 01:23:23,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-03 01:23:23,989 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 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 184 [2023-04-03 01:23:23,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:23:24,029 INFO L225 Difference]: With dead ends: 9314 [2023-04-03 01:23:24,029 INFO L226 Difference]: Without dead ends: 7042 [2023-04-03 01:23:24,047 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 01:23:24,047 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 448 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 698 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 471 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-03 01:23:24,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [471 Valid, 330 Invalid, 882 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 698 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-03 01:23:24,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7042 states. [2023-04-03 01:23:24,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7042 to 6948. [2023-04-03 01:23:24,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6948 states, 4558 states have (on average 1.4370337867485738) internal successors, (6550), 5099 states have internal predecessors, (6550), 1500 states have call successors, (1500), 990 states have call predecessors, (1500), 889 states have return successors, (3682), 1189 states have call predecessors, (3682), 1497 states have call successors, (3682) [2023-04-03 01:23:24,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6948 states to 6948 states and 11732 transitions. [2023-04-03 01:23:24,605 INFO L78 Accepts]: Start accepts. Automaton has 6948 states and 11732 transitions. Word has length 184 [2023-04-03 01:23:24,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:23:24,606 INFO L495 AbstractCegarLoop]: Abstraction has 6948 states and 11732 transitions. [2023-04-03 01:23:24,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 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 01:23:24,606 INFO L276 IsEmpty]: Start isEmpty. Operand 6948 states and 11732 transitions. [2023-04-03 01:23:24,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2023-04-03 01:23:24,615 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:23:24,615 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:23:24,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-03 01:23:24,616 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:23:24,616 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:23:24,616 INFO L85 PathProgramCache]: Analyzing trace with hash -213434940, now seen corresponding path program 1 times [2023-04-03 01:23:24,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:23:24,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655641728] [2023-04-03 01:23:24,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:23:24,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:23:24,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:23:24,873 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2023-04-03 01:23:24,873 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:23:24,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655641728] [2023-04-03 01:23:24,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655641728] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:23:24,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:23:24,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 01:23:24,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398249170] [2023-04-03 01:23:24,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:23:24,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 01:23:24,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:23:24,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 01:23:24,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 01:23:24,875 INFO L87 Difference]: Start difference. First operand 6948 states and 11732 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 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 01:23:26,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:23:26,560 INFO L93 Difference]: Finished difference Result 29872 states and 60863 transitions. [2023-04-03 01:23:26,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-03 01:23:26,560 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 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 184 [2023-04-03 01:23:26,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:23:26,823 INFO L225 Difference]: With dead ends: 29872 [2023-04-03 01:23:26,823 INFO L226 Difference]: Without dead ends: 22940 [2023-04-03 01:23:26,951 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 01:23:26,952 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 427 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 744 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 451 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-03 01:23:26,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [451 Valid, 400 Invalid, 913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 744 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-03 01:23:26,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22940 states. [2023-04-03 01:23:28,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22940 to 22694. [2023-04-03 01:23:28,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22694 states, 15236 states have (on average 1.4993436597532162) internal successors, (22844), 17753 states have internal predecessors, (22844), 5091 states have call successors, (5091), 2608 states have call predecessors, (5091), 2366 states have return successors, (16676), 3522 states have call predecessors, (16676), 5088 states have call successors, (16676) [2023-04-03 01:23:28,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22694 states to 22694 states and 44611 transitions. [2023-04-03 01:23:28,791 INFO L78 Accepts]: Start accepts. Automaton has 22694 states and 44611 transitions. Word has length 184 [2023-04-03 01:23:28,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:23:28,792 INFO L495 AbstractCegarLoop]: Abstraction has 22694 states and 44611 transitions. [2023-04-03 01:23:28,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 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 01:23:28,793 INFO L276 IsEmpty]: Start isEmpty. Operand 22694 states and 44611 transitions. [2023-04-03 01:23:28,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2023-04-03 01:23:28,829 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:23:28,829 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:23:28,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-03 01:23:28,830 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:23:28,830 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:23:28,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1368365605, now seen corresponding path program 1 times [2023-04-03 01:23:28,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:23:28,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68749071] [2023-04-03 01:23:28,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:23:28,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:23:28,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:23:28,982 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 23 proven. 4 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2023-04-03 01:23:28,983 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:23:28,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68749071] [2023-04-03 01:23:28,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68749071] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:23:28,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55602392] [2023-04-03 01:23:28,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:23:28,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:23:28,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:23:28,984 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 01:23:29,012 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 01:23:29,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:23:29,191 INFO L262 TraceCheckSpWp]: Trace formula consists of 1258 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-03 01:23:29,196 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:23:29,223 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-04-03 01:23:29,223 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 01:23:29,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55602392] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:23:29,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 01:23:29,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2023-04-03 01:23:29,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144106329] [2023-04-03 01:23:29,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:23:29,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 01:23:29,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:23:29,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 01:23:29,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-04-03 01:23:29,227 INFO L87 Difference]: Start difference. First operand 22694 states and 44611 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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 01:23:31,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:23:31,080 INFO L93 Difference]: Finished difference Result 44710 states and 94034 transitions. [2023-04-03 01:23:31,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 01:23:31,081 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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 200 [2023-04-03 01:23:31,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:23:31,244 INFO L225 Difference]: With dead ends: 44710 [2023-04-03 01:23:31,245 INFO L226 Difference]: Without dead ends: 28409 [2023-04-03 01:23:31,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 200 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 01:23:31,462 INFO L413 NwaCegarLoop]: 235 mSDtfsCounter, 81 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 01:23:31,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 404 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 01:23:31,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28409 states. [2023-04-03 01:23:33,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28409 to 28312. [2023-04-03 01:23:33,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28312 states, 19118 states have (on average 1.5027199497855424) internal successors, (28729), 22424 states have internal predecessors, (28729), 6320 states have call successors, (6320), 3190 states have call predecessors, (6320), 2873 states have return successors, (23093), 4156 states have call predecessors, (23093), 6317 states have call successors, (23093) [2023-04-03 01:23:33,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28312 states to 28312 states and 58142 transitions. [2023-04-03 01:23:33,619 INFO L78 Accepts]: Start accepts. Automaton has 28312 states and 58142 transitions. Word has length 200 [2023-04-03 01:23:33,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:23:33,619 INFO L495 AbstractCegarLoop]: Abstraction has 28312 states and 58142 transitions. [2023-04-03 01:23:33,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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 01:23:33,620 INFO L276 IsEmpty]: Start isEmpty. Operand 28312 states and 58142 transitions. [2023-04-03 01:23:33,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2023-04-03 01:23:33,658 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:23:33,658 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:23:33,665 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 01:23:33,864 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 01:23:33,865 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:23:33,865 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:23:33,865 INFO L85 PathProgramCache]: Analyzing trace with hash -1712935536, now seen corresponding path program 1 times [2023-04-03 01:23:33,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:23:33,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827476471] [2023-04-03 01:23:33,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:23:33,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:23:33,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:23:34,014 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2023-04-03 01:23:34,014 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:23:34,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827476471] [2023-04-03 01:23:34,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827476471] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:23:34,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908311975] [2023-04-03 01:23:34,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:23:34,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:23:34,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:23:34,016 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 01:23:34,018 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 01:23:34,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:23:34,205 INFO L262 TraceCheckSpWp]: Trace formula consists of 1261 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-03 01:23:34,208 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:23:34,230 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 106 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-04-03 01:23:34,230 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 01:23:34,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908311975] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:23:34,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 01:23:34,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2023-04-03 01:23:34,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592576338] [2023-04-03 01:23:34,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:23:34,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 01:23:34,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:23:34,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 01:23:34,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-04-03 01:23:34,232 INFO L87 Difference]: Start difference. First operand 28312 states and 58142 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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 01:23:36,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:23:36,437 INFO L93 Difference]: Finished difference Result 54432 states and 115637 transitions. [2023-04-03 01:23:36,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 01:23:36,441 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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 200 [2023-04-03 01:23:36,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:23:36,894 INFO L225 Difference]: With dead ends: 54432 [2023-04-03 01:23:36,895 INFO L226 Difference]: Without dead ends: 39221 [2023-04-03 01:23:37,032 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 200 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 01:23:37,033 INFO L413 NwaCegarLoop]: 273 mSDtfsCounter, 111 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 01:23:37,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 446 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 01:23:37,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39221 states. [2023-04-03 01:23:39,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39221 to 34280. [2023-04-03 01:23:39,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34280 states, 23725 states have (on average 1.5208429926238145) internal successors, (36082), 27682 states have internal predecessors, (36082), 7342 states have call successors, (7342), 3546 states have call predecessors, (7342), 3212 states have return successors, (26796), 4892 states have call predecessors, (26796), 7339 states have call successors, (26796) [2023-04-03 01:23:39,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34280 states to 34280 states and 70220 transitions. [2023-04-03 01:23:39,532 INFO L78 Accepts]: Start accepts. Automaton has 34280 states and 70220 transitions. Word has length 200 [2023-04-03 01:23:39,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:23:39,533 INFO L495 AbstractCegarLoop]: Abstraction has 34280 states and 70220 transitions. [2023-04-03 01:23:39,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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 01:23:39,534 INFO L276 IsEmpty]: Start isEmpty. Operand 34280 states and 70220 transitions. [2023-04-03 01:23:39,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2023-04-03 01:23:39,581 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:23:39,581 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:23:39,592 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 01:23:39,792 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 01:23:39,792 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:23:39,792 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:23:39,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1832097698, now seen corresponding path program 1 times [2023-04-03 01:23:39,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:23:39,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483156119] [2023-04-03 01:23:39,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:23:39,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:23:39,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:23:40,329 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 28 proven. 46 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2023-04-03 01:23:40,329 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:23:40,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483156119] [2023-04-03 01:23:40,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483156119] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:23:40,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586064332] [2023-04-03 01:23:40,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:23:40,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:23:40,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:23:40,331 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 01:23:40,333 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 01:23:40,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:23:40,561 INFO L262 TraceCheckSpWp]: Trace formula consists of 1612 conjuncts, 13 conjunts are in the unsatisfiable core [2023-04-03 01:23:40,565 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:23:40,709 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 159 proven. 4 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2023-04-03 01:23:40,710 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-03 01:23:41,084 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 32 proven. 36 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2023-04-03 01:23:41,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586064332] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-03 01:23:41,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1791298791] [2023-04-03 01:23:41,105 INFO L159 IcfgInterpreter]: Started Sifa with 118 locations of interest [2023-04-03 01:23:41,105 INFO L166 IcfgInterpreter]: Building call graph [2023-04-03 01:23:41,109 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-03 01:23:41,112 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-03 01:23:41,112 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-03 01:23:41,635 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 88 for LOIs [2023-04-03 01:23:41,688 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 118 for LOIs [2023-04-03 01:23:42,183 INFO L197 IcfgInterpreter]: Interpreting procedure init_model with input of size 74 for LOIs [2023-04-03 01:23:42,196 INFO L197 IcfgInterpreter]: Interpreting procedure start_simulation with input of size 108 for LOIs [2023-04-03 01:23:45,327 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2023-04-03 01:23:46,092 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2023-04-03 01:24:07,151 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2023-04-03 01:24:07,787 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2023-04-03 01:24:15,407 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2023-04-03 01:24:15,888 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2023-04-03 01:24:19,418 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2023-04-03 01:24:19,935 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2023-04-03 01:24:24,045 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2023-04-03 01:24:24,485 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2023-04-03 01:24:28,697 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2023-04-03 01:24:29,226 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2023-04-03 01:24:38,023 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2023-04-03 01:24:38,445 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2023-04-03 01:24:44,913 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 96 for LOIs [2023-04-03 01:24:44,952 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 66 for LOIs [2023-04-03 01:24:44,961 INFO L197 IcfgInterpreter]: Interpreting procedure stop_simulation with input of size 29 for LOIs [2023-04-03 01:24:45,047 INFO L197 IcfgInterpreter]: Interpreting procedure eval with input of size 80 for LOIs [2023-04-03 01:24:47,504 INFO L197 IcfgInterpreter]: Interpreting procedure master with input of size 62 for LOIs [2023-04-03 01:24:47,592 INFO L197 IcfgInterpreter]: Interpreting procedure error with input of size 44 for LOIs [2023-04-03 01:24:47,599 INFO L197 IcfgInterpreter]: Interpreting procedure init_threads with input of size 74 for LOIs [2023-04-03 01:24:47,615 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 65 for LOIs [2023-04-03 01:24:47,638 INFO L197 IcfgInterpreter]: Interpreting procedure transmit4 with input of size 59 for LOIs [2023-04-03 01:24:47,733 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 19 for LOIs [2023-04-03 01:24:47,745 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 56 for LOIs [2023-04-03 01:24:47,841 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 34 for LOIs [2023-04-03 01:24:48,098 INFO L197 IcfgInterpreter]: Interpreting procedure is_transmit4_triggered with input of size 19 for LOIs [2023-04-03 01:24:48,124 INFO L197 IcfgInterpreter]: Interpreting procedure is_master_triggered with input of size 19 for LOIs [2023-04-03 01:24:48,149 INFO L197 IcfgInterpreter]: Interpreting procedure is_transmit1_triggered with input of size 33 for LOIs [2023-04-03 01:24:48,164 INFO L197 IcfgInterpreter]: Interpreting procedure is_transmit2_triggered with input of size 19 for LOIs [2023-04-03 01:24:48,169 INFO L197 IcfgInterpreter]: Interpreting procedure is_transmit3_triggered with input of size 19 for LOIs [2023-04-03 01:24:48,172 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-03 01:24:56,321 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '356179#(and (<= 1 |#StackHeapBarrier|) (= ~t1_i~0 1) (not (= ~token~0 (+ ~local~0 4))) (= ~m_pc~0 1) (= ~m_i~0 1) (= ~t2_i~0 1) (= ~m_st~0 1) (= |#NULL.offset| 0) (= ~t3_i~0 1) (= ~t4_i~0 1) (= |#NULL.base| 0))' at error location [2023-04-03 01:24:56,322 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-03 01:24:56,322 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-03 01:24:56,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7] total 18 [2023-04-03 01:24:56,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624098959] [2023-04-03 01:24:56,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-03 01:24:56,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-04-03 01:24:56,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:24:56,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-04-03 01:24:56,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=776, Invalid=9324, Unknown=0, NotChecked=0, Total=10100 [2023-04-03 01:24:56,327 INFO L87 Difference]: Start difference. First operand 34280 states and 70220 transitions. Second operand has 18 states, 14 states have (on average 12.785714285714286) internal successors, (179), 17 states have internal predecessors, (179), 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 01:25:26,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:25:26,424 INFO L93 Difference]: Finished difference Result 296348 states and 780629 transitions. [2023-04-03 01:25:26,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2023-04-03 01:25:26,437 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 14 states have (on average 12.785714285714286) internal successors, (179), 17 states have internal predecessors, (179), 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 274 [2023-04-03 01:25:26,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:25:29,230 INFO L225 Difference]: With dead ends: 296348 [2023-04-03 01:25:29,230 INFO L226 Difference]: Without dead ends: 262085 [2023-04-03 01:25:31,003 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 944 GetRequests, 744 SyntacticMatches, 15 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15679 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=2909, Invalid=31873, Unknown=0, NotChecked=0, Total=34782 [2023-04-03 01:25:31,004 INFO L413 NwaCegarLoop]: 511 mSDtfsCounter, 2681 mSDsluCounter, 3050 mSDsCounter, 0 mSdLazyCounter, 4386 mSolverCounterSat, 1735 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2681 SdHoareTripleChecker+Valid, 3561 SdHoareTripleChecker+Invalid, 6121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1735 IncrementalHoareTripleChecker+Valid, 4386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-04-03 01:25:31,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2681 Valid, 3561 Invalid, 6121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1735 Valid, 4386 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-04-03 01:25:31,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262085 states. [2023-04-03 01:25:53,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262085 to 224038. [2023-04-03 01:25:54,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224038 states, 160462 states have (on average 1.5299884084705413) internal successors, (245505), 190241 states have internal predecessors, (245505), 48733 states have call successors, (48733), 12555 states have call predecessors, (48733), 14842 states have return successors, (201631), 35900 states have call predecessors, (201631), 48730 states have call successors, (201631) [2023-04-03 01:25:59,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224038 states to 224038 states and 495869 transitions. [2023-04-03 01:25:59,644 INFO L78 Accepts]: Start accepts. Automaton has 224038 states and 495869 transitions. Word has length 274 [2023-04-03 01:25:59,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:25:59,648 INFO L495 AbstractCegarLoop]: Abstraction has 224038 states and 495869 transitions. [2023-04-03 01:25:59,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 14 states have (on average 12.785714285714286) internal successors, (179), 17 states have internal predecessors, (179), 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 01:25:59,648 INFO L276 IsEmpty]: Start isEmpty. Operand 224038 states and 495869 transitions. [2023-04-03 01:25:59,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2023-04-03 01:25:59,785 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:25:59,786 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, 3, 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 01:25:59,793 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 01:25:59,992 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 01:25:59,993 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:25:59,994 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:25:59,994 INFO L85 PathProgramCache]: Analyzing trace with hash -632289289, now seen corresponding path program 1 times [2023-04-03 01:25:59,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:25:59,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857834569] [2023-04-03 01:25:59,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:25:59,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:26:00,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:26:00,326 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 31 proven. 46 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2023-04-03 01:26:00,326 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:26:00,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857834569] [2023-04-03 01:26:00,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857834569] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:26:00,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983192494] [2023-04-03 01:26:00,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:26:00,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:26:00,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:26:00,328 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 01:26:00,330 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 01:26:00,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:26:00,561 INFO L262 TraceCheckSpWp]: Trace formula consists of 1627 conjuncts, 21 conjunts are in the unsatisfiable core [2023-04-03 01:26:00,565 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:26:00,623 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 168 proven. 0 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2023-04-03 01:26:00,623 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 01:26:00,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983192494] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:26:00,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 01:26:00,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2023-04-03 01:26:00,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194098493] [2023-04-03 01:26:00,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:26:00,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-03 01:26:00,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:26:00,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-03 01:26:00,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2023-04-03 01:26:00,625 INFO L87 Difference]: Start difference. First operand 224038 states and 495869 transitions. Second operand has 7 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 3 states have call successors, (38), 4 states have call predecessors, (38), 4 states have return successors, (34), 4 states have call predecessors, (34), 3 states have call successors, (34) [2023-04-03 01:26:34,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:26:34,095 INFO L93 Difference]: Finished difference Result 491847 states and 1095196 transitions. [2023-04-03 01:26:34,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-03 01:26:34,095 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 3 states have call successors, (38), 4 states have call predecessors, (38), 4 states have return successors, (34), 4 states have call predecessors, (34), 3 states have call successors, (34) Word has length 277 [2023-04-03 01:26:34,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:26:37,052 INFO L225 Difference]: With dead ends: 491847 [2023-04-03 01:26:37,052 INFO L226 Difference]: Without dead ends: 267826 [2023-04-03 01:26:40,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 279 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2023-04-03 01:26:40,366 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 280 mSDsluCounter, 559 mSDsCounter, 0 mSdLazyCounter, 714 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 726 SdHoareTripleChecker+Invalid, 819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-03 01:26:40,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [294 Valid, 726 Invalid, 819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 714 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time]