/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.07.cil-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-03 01:24:26,338 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-03 01:24:26,339 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-03 01:24:26,363 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-03 01:24:26,364 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-03 01:24:26,365 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-03 01:24:26,366 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-03 01:24:26,367 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-03 01:24:26,369 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-03 01:24:26,370 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-03 01:24:26,371 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-03 01:24:26,372 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-03 01:24:26,372 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-03 01:24:26,373 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-03 01:24:26,374 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-03 01:24:26,375 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-03 01:24:26,376 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-03 01:24:26,376 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-03 01:24:26,378 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-03 01:24:26,379 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-03 01:24:26,380 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-03 01:24:26,381 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-03 01:24:26,382 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-03 01:24:26,383 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-03 01:24:26,385 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-03 01:24:26,386 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-03 01:24:26,386 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-03 01:24:26,387 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-03 01:24:26,387 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-03 01:24:26,388 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-03 01:24:26,388 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-03 01:24:26,389 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-03 01:24:26,389 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-03 01:24:26,390 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-03 01:24:26,391 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-03 01:24:26,391 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-03 01:24:26,392 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-03 01:24:26,392 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-03 01:24:26,399 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-03 01:24:26,400 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-03 01:24:26,400 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-03 01:24:26,402 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 01:24:26,432 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-03 01:24:26,432 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-03 01:24:26,433 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-03 01:24:26,433 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-03 01:24:26,433 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-03 01:24:26,434 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-03 01:24:26,434 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-03 01:24:26,434 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-03 01:24:26,434 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-03 01:24:26,434 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-03 01:24:26,434 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-03 01:24:26,435 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-03 01:24:26,435 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-03 01:24:26,435 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-03 01:24:26,435 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-03 01:24:26,435 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-03 01:24:26,435 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-03 01:24:26,435 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-03 01:24:26,436 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-03 01:24:26,436 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-03 01:24:26,436 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-03 01:24:26,436 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-03 01:24:26,440 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-03 01:24:26,440 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-03 01:24:26,440 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-03 01:24:26,440 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-03 01:24:26,441 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-03 01:24:26,441 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-03 01:24:26,441 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-03 01:24:26,442 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-03 01:24:26,442 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-03 01:24:26,442 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-03 01:24:26,442 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 01:24:26,442 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-03 01:24:26,443 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-03 01:24:26,443 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-03 01:24:26,443 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-03 01:24:26,444 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-03 01:24:26,444 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-03 01:24:26,444 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-03 01:24:26,444 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-03 01:24:26,444 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-03 01:24:26,659 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-03 01:24:26,688 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-03 01:24:26,690 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-03 01:24:26,691 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-03 01:24:26,692 INFO L275 PluginConnector]: CDTParser initialized [2023-04-03 01:24:26,693 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/systemc/token_ring.07.cil-2.c [2023-04-03 01:24:27,802 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-03 01:24:28,020 INFO L351 CDTParser]: Found 1 translation units. [2023-04-03 01:24:28,021 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/systemc/token_ring.07.cil-2.c [2023-04-03 01:24:28,031 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e148f8053/facb9eeb8aa3423980a69d0f9d771359/FLAGd690cd81f [2023-04-03 01:24:28,048 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e148f8053/facb9eeb8aa3423980a69d0f9d771359 [2023-04-03 01:24:28,050 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-03 01:24:28,052 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-03 01:24:28,052 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-03 01:24:28,053 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-03 01:24:28,063 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-03 01:24:28,063 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 01:24:28" (1/1) ... [2023-04-03 01:24:28,064 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5dfa0984 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:24:28, skipping insertion in model container [2023-04-03 01:24:28,064 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 01:24:28" (1/1) ... [2023-04-03 01:24:28,072 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-03 01:24:28,104 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-03 01:24:28,203 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.07.cil-2.c[671,684] [2023-04-03 01:24:28,275 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 01:24:28,286 INFO L203 MainTranslator]: Completed pre-run [2023-04-03 01:24:28,297 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.07.cil-2.c[671,684] [2023-04-03 01:24:28,384 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 01:24:28,413 INFO L208 MainTranslator]: Completed translation [2023-04-03 01:24:28,413 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:24:28 WrapperNode [2023-04-03 01:24:28,413 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-03 01:24:28,414 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-03 01:24:28,414 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-03 01:24:28,414 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-03 01:24:28,424 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:24:28" (1/1) ... [2023-04-03 01:24:28,425 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:24:28" (1/1) ... [2023-04-03 01:24:28,453 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:24:28" (1/1) ... [2023-04-03 01:24:28,453 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:24:28" (1/1) ... [2023-04-03 01:24:28,465 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:24:28" (1/1) ... [2023-04-03 01:24:28,493 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:24:28" (1/1) ... [2023-04-03 01:24:28,495 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:24:28" (1/1) ... [2023-04-03 01:24:28,497 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:24:28" (1/1) ... [2023-04-03 01:24:28,501 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-03 01:24:28,502 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-03 01:24:28,502 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-03 01:24:28,502 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-03 01:24:28,503 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:24:28" (1/1) ... [2023-04-03 01:24:28,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 01:24:28,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:24:28,542 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 01:24:28,552 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 01:24:28,582 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-03 01:24:28,583 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-03 01:24:28,583 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-03 01:24:28,583 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2023-04-03 01:24:28,583 INFO L138 BoogieDeclarations]: Found implementation of procedure master [2023-04-03 01:24:28,583 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit1 [2023-04-03 01:24:28,583 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit2 [2023-04-03 01:24:28,583 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit3 [2023-04-03 01:24:28,583 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit4 [2023-04-03 01:24:28,583 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit5 [2023-04-03 01:24:28,584 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit6 [2023-04-03 01:24:28,584 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit7 [2023-04-03 01:24:28,584 INFO L138 BoogieDeclarations]: Found implementation of procedure is_master_triggered [2023-04-03 01:24:28,584 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit1_triggered [2023-04-03 01:24:28,584 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit2_triggered [2023-04-03 01:24:28,584 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit3_triggered [2023-04-03 01:24:28,584 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit4_triggered [2023-04-03 01:24:28,584 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit5_triggered [2023-04-03 01:24:28,584 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit6_triggered [2023-04-03 01:24:28,585 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit7_triggered [2023-04-03 01:24:28,585 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-04-03 01:24:28,585 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2023-04-03 01:24:28,585 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-04-03 01:24:28,585 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2023-04-03 01:24:28,585 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-04-03 01:24:28,585 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-04-03 01:24:28,585 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-04-03 01:24:28,585 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-04-03 01:24:28,585 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_time_events [2023-04-03 01:24:28,586 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_time_events [2023-04-03 01:24:28,586 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2023-04-03 01:24:28,586 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2023-04-03 01:24:28,586 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2023-04-03 01:24:28,586 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-03 01:24:28,586 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-03 01:24:28,586 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-03 01:24:28,586 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-03 01:24:28,587 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-03 01:24:28,587 INFO L130 BoogieDeclarations]: Found specification of procedure error [2023-04-03 01:24:28,587 INFO L130 BoogieDeclarations]: Found specification of procedure is_master_triggered [2023-04-03 01:24:28,587 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit1_triggered [2023-04-03 01:24:28,587 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit2_triggered [2023-04-03 01:24:28,587 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit3_triggered [2023-04-03 01:24:28,587 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit4_triggered [2023-04-03 01:24:28,587 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit5_triggered [2023-04-03 01:24:28,588 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit6_triggered [2023-04-03 01:24:28,588 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit7_triggered [2023-04-03 01:24:28,588 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-04-03 01:24:28,588 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-03 01:24:28,588 INFO L130 BoogieDeclarations]: Found specification of procedure master [2023-04-03 01:24:28,588 INFO L130 BoogieDeclarations]: Found specification of procedure transmit1 [2023-04-03 01:24:28,588 INFO L130 BoogieDeclarations]: Found specification of procedure transmit2 [2023-04-03 01:24:28,588 INFO L130 BoogieDeclarations]: Found specification of procedure transmit3 [2023-04-03 01:24:28,588 INFO L130 BoogieDeclarations]: Found specification of procedure transmit4 [2023-04-03 01:24:28,589 INFO L130 BoogieDeclarations]: Found specification of procedure transmit5 [2023-04-03 01:24:28,589 INFO L130 BoogieDeclarations]: Found specification of procedure transmit6 [2023-04-03 01:24:28,589 INFO L130 BoogieDeclarations]: Found specification of procedure transmit7 [2023-04-03 01:24:28,589 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-04-03 01:24:28,589 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2023-04-03 01:24:28,589 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-04-03 01:24:28,589 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2023-04-03 01:24:28,589 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-04-03 01:24:28,589 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-04-03 01:24:28,590 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-04-03 01:24:28,590 INFO L130 BoogieDeclarations]: Found specification of procedure fire_time_events [2023-04-03 01:24:28,590 INFO L130 BoogieDeclarations]: Found specification of procedure reset_time_events [2023-04-03 01:24:28,590 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2023-04-03 01:24:28,590 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2023-04-03 01:24:28,590 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2023-04-03 01:24:28,590 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-03 01:24:28,590 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-03 01:24:28,590 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-03 01:24:28,591 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-03 01:24:28,591 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-03 01:24:28,591 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-03 01:24:28,591 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-03 01:24:28,674 INFO L236 CfgBuilder]: Building ICFG [2023-04-03 01:24:28,676 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-03 01:24:29,322 INFO L277 CfgBuilder]: Performing block encoding [2023-04-03 01:24:29,657 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-03 01:24:29,657 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-04-03 01:24:29,661 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 01:24:29 BoogieIcfgContainer [2023-04-03 01:24:29,661 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-03 01:24:29,664 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-03 01:24:29,664 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-03 01:24:29,667 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-03 01:24:29,667 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.04 01:24:28" (1/3) ... [2023-04-03 01:24:29,668 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a4b2605 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 01:24:29, skipping insertion in model container [2023-04-03 01:24:29,668 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:24:28" (2/3) ... [2023-04-03 01:24:29,668 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a4b2605 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 01:24:29, skipping insertion in model container [2023-04-03 01:24:29,668 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 01:24:29" (3/3) ... [2023-04-03 01:24:29,671 INFO L112 eAbstractionObserver]: Analyzing ICFG token_ring.07.cil-2.c [2023-04-03 01:24:29,685 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-03 01:24:29,685 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-03 01:24:29,738 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-03 01:24:29,744 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;@4832a8ea, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-03 01:24:29,744 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-03 01:24:29,749 INFO L276 IsEmpty]: Start isEmpty. Operand has 215 states, 133 states have (on average 1.443609022556391) internal successors, (192), 146 states have internal predecessors, (192), 48 states have call successors, (48), 32 states have call predecessors, (48), 32 states have return successors, (48), 47 states have call predecessors, (48), 48 states have call successors, (48) [2023-04-03 01:24:29,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-04-03 01:24:29,759 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:24:29,759 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:24:29,760 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:24:29,763 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:24:29,764 INFO L85 PathProgramCache]: Analyzing trace with hash -300782958, now seen corresponding path program 1 times [2023-04-03 01:24:29,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:24:29,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255918141] [2023-04-03 01:24:29,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:24:29,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:24:29,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:24:30,394 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 01:24:30,395 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:24:30,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255918141] [2023-04-03 01:24:30,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255918141] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:24:30,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:24:30,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-03 01:24:30,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075340573] [2023-04-03 01:24:30,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:24:30,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-03 01:24:30,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:24:30,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-03 01:24:30,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-03 01:24:30,436 INFO L87 Difference]: Start difference. First operand has 215 states, 133 states have (on average 1.443609022556391) internal successors, (192), 146 states have internal predecessors, (192), 48 states have call successors, (48), 32 states have call predecessors, (48), 32 states have return successors, (48), 47 states have call predecessors, (48), 48 states have call successors, (48) Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 4 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) [2023-04-03 01:24:30,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:24:30,998 INFO L93 Difference]: Finished difference Result 598 states and 849 transitions. [2023-04-03 01:24:30,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-03 01:24:31,000 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 4 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) Word has length 99 [2023-04-03 01:24:31,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:24:31,019 INFO L225 Difference]: With dead ends: 598 [2023-04-03 01:24:31,020 INFO L226 Difference]: Without dead ends: 387 [2023-04-03 01:24:31,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-03 01:24:31,034 INFO L413 NwaCegarLoop]: 436 mSDtfsCounter, 491 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 491 SdHoareTripleChecker+Valid, 701 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-03 01:24:31,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [491 Valid, 701 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-03 01:24:31,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2023-04-03 01:24:31,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 386. [2023-04-03 01:24:31,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 246 states have (on average 1.3943089430894309) internal successors, (343), 266 states have internal predecessors, (343), 85 states have call successors, (85), 58 states have call predecessors, (85), 54 states have return successors, (82), 79 states have call predecessors, (82), 81 states have call successors, (82) [2023-04-03 01:24:31,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 510 transitions. [2023-04-03 01:24:31,160 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 510 transitions. Word has length 99 [2023-04-03 01:24:31,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:24:31,160 INFO L495 AbstractCegarLoop]: Abstraction has 386 states and 510 transitions. [2023-04-03 01:24:31,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 4 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) [2023-04-03 01:24:31,161 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 510 transitions. [2023-04-03 01:24:31,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2023-04-03 01:24:31,167 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:24:31,167 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:24:31,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-03 01:24:31,168 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:24:31,168 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:24:31,169 INFO L85 PathProgramCache]: Analyzing trace with hash 154929242, now seen corresponding path program 1 times [2023-04-03 01:24:31,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:24:31,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327892575] [2023-04-03 01:24:31,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:24:31,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:24:31,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:24:31,624 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-04-03 01:24:31,624 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:24:31,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327892575] [2023-04-03 01:24:31,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327892575] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:24:31,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969041132] [2023-04-03 01:24:31,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:24:31,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:24:31,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:24:31,633 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 01:24:31,658 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 01:24:31,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:24:31,960 INFO L262 TraceCheckSpWp]: Trace formula consists of 1535 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-03 01:24:31,972 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:24:32,024 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-04-03 01:24:32,024 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 01:24:32,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969041132] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:24:32,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 01:24:32,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-03 01:24:32,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795350024] [2023-04-03 01:24:32,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:24:32,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 01:24:32,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:24:32,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 01:24:32,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-03 01:24:32,028 INFO L87 Difference]: Start difference. First operand 386 states and 510 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 3 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2023-04-03 01:24:32,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:24:32,143 INFO L93 Difference]: Finished difference Result 661 states and 896 transitions. [2023-04-03 01:24:32,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 01:24:32,143 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 3 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 183 [2023-04-03 01:24:32,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:24:32,147 INFO L225 Difference]: With dead ends: 661 [2023-04-03 01:24:32,147 INFO L226 Difference]: Without dead ends: 470 [2023-04-03 01:24:32,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 185 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 01:24:32,149 INFO L413 NwaCegarLoop]: 334 mSDtfsCounter, 100 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 577 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 01:24:32,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 577 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 01:24:32,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2023-04-03 01:24:32,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 442. [2023-04-03 01:24:32,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 286 states have (on average 1.4405594405594406) internal successors, (412), 313 states have internal predecessors, (412), 93 states have call successors, (93), 66 states have call predecessors, (93), 62 states have return successors, (97), 87 states have call predecessors, (97), 89 states have call successors, (97) [2023-04-03 01:24:32,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 602 transitions. [2023-04-03 01:24:32,215 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 602 transitions. Word has length 183 [2023-04-03 01:24:32,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:24:32,217 INFO L495 AbstractCegarLoop]: Abstraction has 442 states and 602 transitions. [2023-04-03 01:24:32,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 3 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2023-04-03 01:24:32,217 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 602 transitions. [2023-04-03 01:24:32,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2023-04-03 01:24:32,226 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:24:32,227 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:24:32,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-03 01:24:32,434 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 01:24:32,434 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:24:32,434 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:24:32,435 INFO L85 PathProgramCache]: Analyzing trace with hash -341805431, now seen corresponding path program 1 times [2023-04-03 01:24:32,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:24:32,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400027224] [2023-04-03 01:24:32,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:24:32,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:24:32,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:24:32,870 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 2 proven. 43 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2023-04-03 01:24:32,870 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:24:32,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400027224] [2023-04-03 01:24:32,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400027224] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:24:32,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996873508] [2023-04-03 01:24:32,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:24:32,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:24:32,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:24:32,872 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 01:24:32,875 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 01:24:33,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:24:33,199 INFO L262 TraceCheckSpWp]: Trace formula consists of 1816 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-03 01:24:33,208 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:24:33,272 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 128 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-04-03 01:24:33,273 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 01:24:33,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996873508] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:24:33,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 01:24:33,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-03 01:24:33,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141804234] [2023-04-03 01:24:33,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:24:33,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 01:24:33,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:24:33,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 01:24:33,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-03 01:24:33,276 INFO L87 Difference]: Start difference. First operand 442 states and 602 transitions. Second operand has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 3 states have call successors, (36), 3 states have call predecessors, (36), 3 states have return successors, (31), 3 states have call predecessors, (31), 3 states have call successors, (31) [2023-04-03 01:24:33,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:24:33,405 INFO L93 Difference]: Finished difference Result 1005 states and 1396 transitions. [2023-04-03 01:24:33,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 01:24:33,406 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 3 states have call successors, (36), 3 states have call predecessors, (36), 3 states have return successors, (31), 3 states have call predecessors, (31), 3 states have call successors, (31) Word has length 252 [2023-04-03 01:24:33,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:24:33,409 INFO L225 Difference]: With dead ends: 1005 [2023-04-03 01:24:33,409 INFO L226 Difference]: Without dead ends: 579 [2023-04-03 01:24:33,410 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 254 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 01:24:33,411 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 239 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 01:24:33,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [239 Valid, 303 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 01:24:33,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2023-04-03 01:24:33,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 579. [2023-04-03 01:24:33,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 579 states, 385 states have (on average 1.3974025974025974) internal successors, (538), 412 states have internal predecessors, (538), 111 states have call successors, (111), 86 states have call predecessors, (111), 82 states have return successors, (115), 105 states have call predecessors, (115), 107 states have call successors, (115) [2023-04-03 01:24:33,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 764 transitions. [2023-04-03 01:24:33,441 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 764 transitions. Word has length 252 [2023-04-03 01:24:33,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:24:33,441 INFO L495 AbstractCegarLoop]: Abstraction has 579 states and 764 transitions. [2023-04-03 01:24:33,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 3 states have call successors, (36), 3 states have call predecessors, (36), 3 states have return successors, (31), 3 states have call predecessors, (31), 3 states have call successors, (31) [2023-04-03 01:24:33,442 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 764 transitions. [2023-04-03 01:24:33,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2023-04-03 01:24:33,446 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:24:33,446 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:24:33,454 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-04-03 01:24:33,654 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 01:24:33,654 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:24:33,654 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:24:33,654 INFO L85 PathProgramCache]: Analyzing trace with hash 780295, now seen corresponding path program 1 times [2023-04-03 01:24:33,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:24:33,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540070395] [2023-04-03 01:24:33,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:24:33,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:24:33,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:24:34,010 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 2 proven. 43 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2023-04-03 01:24:34,010 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:24:34,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540070395] [2023-04-03 01:24:34,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540070395] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:24:34,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133583274] [2023-04-03 01:24:34,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:24:34,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:24:34,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:24:34,012 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 01:24:34,040 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 01:24:34,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:24:34,306 INFO L262 TraceCheckSpWp]: Trace formula consists of 1810 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-03 01:24:34,314 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:24:34,406 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 173 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-03 01:24:34,406 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 01:24:34,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133583274] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:24:34,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 01:24:34,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-03 01:24:34,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703067975] [2023-04-03 01:24:34,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:24:34,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 01:24:34,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:24:34,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 01:24:34,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-03 01:24:34,409 INFO L87 Difference]: Start difference. First operand 579 states and 764 transitions. Second operand has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 3 states have call successors, (42), 3 states have call predecessors, (42), 3 states have return successors, (38), 3 states have call predecessors, (38), 3 states have call successors, (38) [2023-04-03 01:24:34,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:24:34,581 INFO L93 Difference]: Finished difference Result 1692 states and 2349 transitions. [2023-04-03 01:24:34,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 01:24:34,582 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 3 states have call successors, (42), 3 states have call predecessors, (42), 3 states have return successors, (38), 3 states have call predecessors, (38), 3 states have call successors, (38) Word has length 252 [2023-04-03 01:24:34,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:24:34,592 INFO L225 Difference]: With dead ends: 1692 [2023-04-03 01:24:34,593 INFO L226 Difference]: Without dead ends: 1130 [2023-04-03 01:24:34,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 254 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 01:24:34,598 INFO L413 NwaCegarLoop]: 385 mSDtfsCounter, 190 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 01:24:34,600 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 607 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 01:24:34,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1130 states. [2023-04-03 01:24:34,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1130 to 1121. [2023-04-03 01:24:34,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1121 states, 753 states have (on average 1.3904382470119523) internal successors, (1047), 802 states have internal predecessors, (1047), 209 states have call successors, (209), 165 states have call predecessors, (209), 158 states have return successors, (270), 200 states have call predecessors, (270), 205 states have call successors, (270) [2023-04-03 01:24:34,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1121 states to 1121 states and 1526 transitions. [2023-04-03 01:24:34,672 INFO L78 Accepts]: Start accepts. Automaton has 1121 states and 1526 transitions. Word has length 252 [2023-04-03 01:24:34,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:24:34,674 INFO L495 AbstractCegarLoop]: Abstraction has 1121 states and 1526 transitions. [2023-04-03 01:24:34,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 3 states have call successors, (42), 3 states have call predecessors, (42), 3 states have return successors, (38), 3 states have call predecessors, (38), 3 states have call successors, (38) [2023-04-03 01:24:34,674 INFO L276 IsEmpty]: Start isEmpty. Operand 1121 states and 1526 transitions. [2023-04-03 01:24:34,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2023-04-03 01:24:34,680 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:24:34,680 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:24:34,689 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 01:24:34,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:24:34,887 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:24:34,887 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:24:34,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1040484604, now seen corresponding path program 1 times [2023-04-03 01:24:34,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:24:34,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686816106] [2023-04-03 01:24:34,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:24:34,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:24:34,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:24:35,269 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 2 proven. 43 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2023-04-03 01:24:35,270 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:24:35,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686816106] [2023-04-03 01:24:35,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686816106] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:24:35,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246386155] [2023-04-03 01:24:35,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:24:35,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:24:35,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:24:35,272 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 01:24:35,275 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 01:24:35,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:24:35,605 INFO L262 TraceCheckSpWp]: Trace formula consists of 1812 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-03 01:24:35,611 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:24:35,681 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2023-04-03 01:24:35,681 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 01:24:35,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246386155] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:24:35,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 01:24:35,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-03 01:24:35,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146948531] [2023-04-03 01:24:35,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:24:35,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 01:24:35,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:24:35,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 01:24:35,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-03 01:24:35,683 INFO L87 Difference]: Start difference. First operand 1121 states and 1526 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 2 states have internal predecessors, (96), 3 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (24), 2 states have call predecessors, (24), 3 states have call successors, (24) [2023-04-03 01:24:35,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:24:35,890 INFO L93 Difference]: Finished difference Result 3307 states and 4654 transitions. [2023-04-03 01:24:35,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 01:24:35,891 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 2 states have internal predecessors, (96), 3 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (24), 2 states have call predecessors, (24), 3 states have call successors, (24) Word has length 253 [2023-04-03 01:24:35,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:24:35,902 INFO L225 Difference]: With dead ends: 3307 [2023-04-03 01:24:35,902 INFO L226 Difference]: Without dead ends: 2202 [2023-04-03 01:24:35,907 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 255 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 01:24:35,908 INFO L413 NwaCegarLoop]: 260 mSDtfsCounter, 229 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 01:24:35,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 471 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 01:24:35,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2202 states. [2023-04-03 01:24:36,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2202 to 2192. [2023-04-03 01:24:36,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2192 states, 1482 states have (on average 1.3819163292847503) internal successors, (2048), 1572 states have internal predecessors, (2048), 402 states have call successors, (402), 324 states have call predecessors, (402), 307 states have return successors, (529), 381 states have call predecessors, (529), 398 states have call successors, (529) [2023-04-03 01:24:36,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2192 states to 2192 states and 2979 transitions. [2023-04-03 01:24:36,061 INFO L78 Accepts]: Start accepts. Automaton has 2192 states and 2979 transitions. Word has length 253 [2023-04-03 01:24:36,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:24:36,061 INFO L495 AbstractCegarLoop]: Abstraction has 2192 states and 2979 transitions. [2023-04-03 01:24:36,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 2 states have internal predecessors, (96), 3 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (24), 2 states have call predecessors, (24), 3 states have call successors, (24) [2023-04-03 01:24:36,062 INFO L276 IsEmpty]: Start isEmpty. Operand 2192 states and 2979 transitions. [2023-04-03 01:24:36,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2023-04-03 01:24:36,070 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:24:36,071 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:24:36,085 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-04-03 01:24:36,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:24:36,284 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:24:36,284 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:24:36,284 INFO L85 PathProgramCache]: Analyzing trace with hash 171158916, now seen corresponding path program 1 times [2023-04-03 01:24:36,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:24:36,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734745411] [2023-04-03 01:24:36,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:24:36,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:24:36,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:24:36,670 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 2 proven. 43 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2023-04-03 01:24:36,670 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:24:36,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734745411] [2023-04-03 01:24:36,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734745411] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:24:36,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038162147] [2023-04-03 01:24:36,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:24:36,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:24:36,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:24:36,673 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 01:24:36,677 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 01:24:37,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:24:37,016 INFO L262 TraceCheckSpWp]: Trace formula consists of 1800 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-03 01:24:37,023 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:24:37,131 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 175 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-03 01:24:37,131 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 01:24:37,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038162147] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:24:37,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 01:24:37,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-03 01:24:37,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157616046] [2023-04-03 01:24:37,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:24:37,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 01:24:37,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:24:37,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 01:24:37,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-03 01:24:37,134 INFO L87 Difference]: Start difference. First operand 2192 states and 2979 transitions. Second operand has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 3 states have call successors, (42), 3 states have call predecessors, (42), 3 states have return successors, (38), 3 states have call predecessors, (38), 3 states have call successors, (38) [2023-04-03 01:24:37,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:24:37,335 INFO L93 Difference]: Finished difference Result 3296 states and 4428 transitions. [2023-04-03 01:24:37,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 01:24:37,336 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 3 states have call successors, (42), 3 states have call predecessors, (42), 3 states have return successors, (38), 3 states have call predecessors, (38), 3 states have call successors, (38) Word has length 253 [2023-04-03 01:24:37,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:24:37,348 INFO L225 Difference]: With dead ends: 3296 [2023-04-03 01:24:37,348 INFO L226 Difference]: Without dead ends: 2199 [2023-04-03 01:24:37,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 255 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 01:24:37,354 INFO L413 NwaCegarLoop]: 229 mSDtfsCounter, 188 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 01:24:37,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 440 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 01:24:37,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2199 states. [2023-04-03 01:24:37,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2199 to 2191. [2023-04-03 01:24:37,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2191 states, 1482 states have (on average 1.3724696356275303) internal successors, (2034), 1572 states have internal predecessors, (2034), 401 states have call successors, (401), 324 states have call predecessors, (401), 307 states have return successors, (438), 379 states have call predecessors, (438), 397 states have call successors, (438) [2023-04-03 01:24:37,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2191 states to 2191 states and 2873 transitions. [2023-04-03 01:24:37,476 INFO L78 Accepts]: Start accepts. Automaton has 2191 states and 2873 transitions. Word has length 253 [2023-04-03 01:24:37,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:24:37,476 INFO L495 AbstractCegarLoop]: Abstraction has 2191 states and 2873 transitions. [2023-04-03 01:24:37,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 3 states have call successors, (42), 3 states have call predecessors, (42), 3 states have return successors, (38), 3 states have call predecessors, (38), 3 states have call successors, (38) [2023-04-03 01:24:37,477 INFO L276 IsEmpty]: Start isEmpty. Operand 2191 states and 2873 transitions. [2023-04-03 01:24:37,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2023-04-03 01:24:37,484 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:24:37,484 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:24:37,495 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 01:24:37,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:24:37,692 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:24:37,693 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:24:37,693 INFO L85 PathProgramCache]: Analyzing trace with hash -73159383, now seen corresponding path program 1 times [2023-04-03 01:24:37,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:24:37,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966016533] [2023-04-03 01:24:37,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:24:37,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:24:37,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:24:38,005 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 2 proven. 43 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2023-04-03 01:24:38,005 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:24:38,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966016533] [2023-04-03 01:24:38,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966016533] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:24:38,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104036730] [2023-04-03 01:24:38,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:24:38,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:24:38,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:24:38,007 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 01:24:38,010 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 01:24:38,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:24:38,330 INFO L262 TraceCheckSpWp]: Trace formula consists of 1798 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-03 01:24:38,339 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:24:38,428 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-04-03 01:24:38,428 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 01:24:38,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104036730] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:24:38,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 01:24:38,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-03 01:24:38,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586448481] [2023-04-03 01:24:38,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:24:38,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 01:24:38,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:24:38,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 01:24:38,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-03 01:24:38,431 INFO L87 Difference]: Start difference. First operand 2191 states and 2873 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 2 states have internal predecessors, (119), 3 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (29), 2 states have call predecessors, (29), 3 states have call successors, (29) [2023-04-03 01:24:38,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:24:38,689 INFO L93 Difference]: Finished difference Result 6496 states and 8748 transitions. [2023-04-03 01:24:38,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 01:24:38,690 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 2 states have internal predecessors, (119), 3 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (29), 2 states have call predecessors, (29), 3 states have call successors, (29) Word has length 252 [2023-04-03 01:24:38,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:24:38,710 INFO L225 Difference]: With dead ends: 6496 [2023-04-03 01:24:38,710 INFO L226 Difference]: Without dead ends: 4321 [2023-04-03 01:24:38,719 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 254 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 01:24:38,719 INFO L413 NwaCegarLoop]: 255 mSDtfsCounter, 194 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 01:24:38,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 466 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 01:24:38,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4321 states. [2023-04-03 01:24:38,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4321 to 4305. [2023-04-03 01:24:38,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4305 states, 2922 states have (on average 1.3627652292950034) internal successors, (3982), 3088 states have internal predecessors, (3982), 783 states have call successors, (783), 642 states have call predecessors, (783), 599 states have return successors, (884), 731 states have call predecessors, (884), 779 states have call successors, (884) [2023-04-03 01:24:39,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4305 states to 4305 states and 5649 transitions. [2023-04-03 01:24:39,018 INFO L78 Accepts]: Start accepts. Automaton has 4305 states and 5649 transitions. Word has length 252 [2023-04-03 01:24:39,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:24:39,019 INFO L495 AbstractCegarLoop]: Abstraction has 4305 states and 5649 transitions. [2023-04-03 01:24:39,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 2 states have internal predecessors, (119), 3 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (29), 2 states have call predecessors, (29), 3 states have call successors, (29) [2023-04-03 01:24:39,019 INFO L276 IsEmpty]: Start isEmpty. Operand 4305 states and 5649 transitions. [2023-04-03 01:24:39,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2023-04-03 01:24:39,032 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:24:39,033 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:24:39,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-03 01:24:39,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:24:39,241 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:24:39,241 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:24:39,241 INFO L85 PathProgramCache]: Analyzing trace with hash 817982782, now seen corresponding path program 1 times [2023-04-03 01:24:39,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:24:39,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432167672] [2023-04-03 01:24:39,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:24:39,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:24:39,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:24:39,536 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 2 proven. 43 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2023-04-03 01:24:39,536 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:24:39,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432167672] [2023-04-03 01:24:39,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432167672] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:24:39,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457063776] [2023-04-03 01:24:39,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:24:39,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:24:39,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:24:39,538 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 01:24:39,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-03 01:24:39,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:24:39,824 INFO L262 TraceCheckSpWp]: Trace formula consists of 1789 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-03 01:24:39,830 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:24:39,897 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2023-04-03 01:24:39,898 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 01:24:39,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457063776] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:24:39,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 01:24:39,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-03 01:24:39,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255254296] [2023-04-03 01:24:39,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:24:39,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 01:24:39,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:24:39,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 01:24:39,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-03 01:24:39,900 INFO L87 Difference]: Start difference. First operand 4305 states and 5649 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 3 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (26), 2 states have call predecessors, (26), 3 states have call successors, (26) [2023-04-03 01:24:40,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:24:40,411 INFO L93 Difference]: Finished difference Result 12794 states and 17278 transitions. [2023-04-03 01:24:40,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 01:24:40,412 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 3 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (26), 2 states have call predecessors, (26), 3 states have call successors, (26) Word has length 252 [2023-04-03 01:24:40,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:24:40,466 INFO L225 Difference]: With dead ends: 12794 [2023-04-03 01:24:40,466 INFO L226 Difference]: Without dead ends: 8505 [2023-04-03 01:24:40,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 254 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 01:24:40,496 INFO L413 NwaCegarLoop]: 255 mSDtfsCounter, 215 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 01:24:40,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 466 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 01:24:40,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8505 states. [2023-04-03 01:24:40,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8505 to 8477. [2023-04-03 01:24:41,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8477 states, 5766 states have (on average 1.3524106833159903) internal successors, (7798), 6072 states have internal predecessors, (7798), 1539 states have call successors, (1539), 1278 states have call predecessors, (1539), 1171 states have return successors, (1818), 1415 states have call predecessors, (1818), 1535 states have call successors, (1818) [2023-04-03 01:24:41,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8477 states to 8477 states and 11155 transitions. [2023-04-03 01:24:41,057 INFO L78 Accepts]: Start accepts. Automaton has 8477 states and 11155 transitions. Word has length 252 [2023-04-03 01:24:41,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:24:41,057 INFO L495 AbstractCegarLoop]: Abstraction has 8477 states and 11155 transitions. [2023-04-03 01:24:41,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 3 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (26), 2 states have call predecessors, (26), 3 states have call successors, (26) [2023-04-03 01:24:41,058 INFO L276 IsEmpty]: Start isEmpty. Operand 8477 states and 11155 transitions. [2023-04-03 01:24:41,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2023-04-03 01:24:41,085 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:24:41,086 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:24:41,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-03 01:24:41,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:24:41,299 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:24:41,299 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:24:41,299 INFO L85 PathProgramCache]: Analyzing trace with hash -688006625, now seen corresponding path program 1 times [2023-04-03 01:24:41,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:24:41,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918487768] [2023-04-03 01:24:41,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:24:41,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:24:41,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:24:41,594 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 2 proven. 43 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2023-04-03 01:24:41,594 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:24:41,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918487768] [2023-04-03 01:24:41,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918487768] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:24:41,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081578081] [2023-04-03 01:24:41,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:24:41,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:24:41,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:24:41,596 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 01:24:41,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-03 01:24:41,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:24:41,876 INFO L262 TraceCheckSpWp]: Trace formula consists of 1780 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-03 01:24:41,883 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:24:41,959 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2023-04-03 01:24:41,960 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 01:24:41,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081578081] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:24:41,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 01:24:41,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-03 01:24:41,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627566487] [2023-04-03 01:24:41,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:24:41,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 01:24:41,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:24:41,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 01:24:41,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-03 01:24:41,962 INFO L87 Difference]: Start difference. First operand 8477 states and 11155 transitions. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 2 states have internal predecessors, (114), 3 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (28), 2 states have call predecessors, (28), 3 states have call successors, (28) [2023-04-03 01:24:42,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:24:42,746 INFO L93 Difference]: Finished difference Result 25222 states and 34288 transitions. [2023-04-03 01:24:42,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 01:24:42,747 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 2 states have internal predecessors, (114), 3 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (28), 2 states have call predecessors, (28), 3 states have call successors, (28) Word has length 252 [2023-04-03 01:24:42,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:24:42,825 INFO L225 Difference]: With dead ends: 25222 [2023-04-03 01:24:42,825 INFO L226 Difference]: Without dead ends: 16761 [2023-04-03 01:24:42,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 254 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 01:24:42,876 INFO L413 NwaCegarLoop]: 229 mSDtfsCounter, 201 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 01:24:42,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 440 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 01:24:42,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16761 states. [2023-04-03 01:24:43,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16761 to 16709. [2023-04-03 01:24:43,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16709 states, 11382 states have (on average 1.341591987348445) internal successors, (15270), 11944 states have internal predecessors, (15270), 3035 states have call successors, (3035), 2550 states have call predecessors, (3035), 2291 states have return successors, (3824), 2743 states have call predecessors, (3824), 3031 states have call successors, (3824) [2023-04-03 01:24:43,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16709 states to 16709 states and 22129 transitions. [2023-04-03 01:24:43,995 INFO L78 Accepts]: Start accepts. Automaton has 16709 states and 22129 transitions. Word has length 252 [2023-04-03 01:24:43,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:24:43,996 INFO L495 AbstractCegarLoop]: Abstraction has 16709 states and 22129 transitions. [2023-04-03 01:24:43,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 2 states have internal predecessors, (114), 3 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (28), 2 states have call predecessors, (28), 3 states have call successors, (28) [2023-04-03 01:24:43,997 INFO L276 IsEmpty]: Start isEmpty. Operand 16709 states and 22129 transitions. [2023-04-03 01:24:44,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2023-04-03 01:24:44,070 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:24:44,071 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:24:44,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-03 01:24:44,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-04-03 01:24:44,278 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:24:44,279 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:24:44,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1561834512, now seen corresponding path program 1 times [2023-04-03 01:24:44,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:24:44,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582303341] [2023-04-03 01:24:44,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:24:44,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:24:44,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:24:44,555 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2023-04-03 01:24:44,555 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:24:44,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582303341] [2023-04-03 01:24:44,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582303341] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:24:44,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:24:44,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 01:24:44,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345463421] [2023-04-03 01:24:44,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:24:44,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 01:24:44,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:24:44,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 01:24:44,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 01:24:44,557 INFO L87 Difference]: Start difference. First operand 16709 states and 22129 transitions. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 4 states have call successors, (27), 4 states have call predecessors, (27), 3 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2023-04-03 01:24:47,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:24:47,901 INFO L93 Difference]: Finished difference Result 69314 states and 102085 transitions. [2023-04-03 01:24:47,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-03 01:24:47,902 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 4 states have call successors, (27), 4 states have call predecessors, (27), 3 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) Word has length 252 [2023-04-03 01:24:47,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:24:48,237 INFO L225 Difference]: With dead ends: 69314 [2023-04-03 01:24:48,237 INFO L226 Difference]: Without dead ends: 52621 [2023-04-03 01:24:48,410 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 01:24:48,411 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 705 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 1062 mSolverCounterSat, 242 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 741 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 1304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 242 IncrementalHoareTripleChecker+Valid, 1062 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-04-03 01:24:48,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [741 Valid, 436 Invalid, 1304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [242 Valid, 1062 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-04-03 01:24:48,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52621 states. [2023-04-03 01:24:51,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52621 to 52357. [2023-04-03 01:24:51,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52357 states, 36086 states have (on average 1.3870753200687247) internal successors, (50054), 39112 states have internal predecessors, (50054), 9883 states have call successors, (9883), 7190 states have call predecessors, (9883), 6387 states have return successors, (15387), 8215 states have call predecessors, (15387), 9879 states have call successors, (15387) [2023-04-03 01:24:52,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52357 states to 52357 states and 75324 transitions. [2023-04-03 01:24:52,569 INFO L78 Accepts]: Start accepts. Automaton has 52357 states and 75324 transitions. Word has length 252 [2023-04-03 01:24:52,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:24:52,570 INFO L495 AbstractCegarLoop]: Abstraction has 52357 states and 75324 transitions. [2023-04-03 01:24:52,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 4 states have call successors, (27), 4 states have call predecessors, (27), 3 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2023-04-03 01:24:52,570 INFO L276 IsEmpty]: Start isEmpty. Operand 52357 states and 75324 transitions. [2023-04-03 01:24:52,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2023-04-03 01:24:52,802 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:24:52,803 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:24:52,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-03 01:24:52,803 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:24:52,804 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:24:52,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1465936475, now seen corresponding path program 1 times [2023-04-03 01:24:52,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:24:52,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174853139] [2023-04-03 01:24:52,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:24:52,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:24:52,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:24:53,046 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2023-04-03 01:24:53,046 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:24:53,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174853139] [2023-04-03 01:24:53,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174853139] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:24:53,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:24:53,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 01:24:53,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886730998] [2023-04-03 01:24:53,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:24:53,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 01:24:53,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:24:53,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 01:24:53,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 01:24:53,049 INFO L87 Difference]: Start difference. First operand 52357 states and 75324 transitions. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 4 states have call successors, (27), 4 states have call predecessors, (27), 3 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2023-04-03 01:25:05,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:25:05,738 INFO L93 Difference]: Finished difference Result 228826 states and 377734 transitions. [2023-04-03 01:25:05,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-03 01:25:05,738 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 4 states have call successors, (27), 4 states have call predecessors, (27), 3 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) Word has length 252 [2023-04-03 01:25:05,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:25:07,309 INFO L225 Difference]: With dead ends: 228826 [2023-04-03 01:25:07,309 INFO L226 Difference]: Without dead ends: 176485 [2023-04-03 01:25:08,037 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 01:25:08,037 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 682 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 1074 mSolverCounterSat, 238 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 717 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 1312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 238 IncrementalHoareTripleChecker+Valid, 1074 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-04-03 01:25:08,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [717 Valid, 522 Invalid, 1312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [238 Valid, 1074 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-04-03 01:25:08,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176485 states. [2023-04-03 01:25:18,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176485 to 175711. [2023-04-03 01:25:18,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175711 states, 121790 states have (on average 1.4510304622711225) internal successors, (176721), 137744 states have internal predecessors, (176721), 35857 states have call successors, (35857), 20560 states have call predecessors, (35857), 18063 states have return successors, (70535), 26383 states have call predecessors, (70535), 35853 states have call successors, (70535) [2023-04-03 01:25:21,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175711 states to 175711 states and 283113 transitions. [2023-04-03 01:25:21,953 INFO L78 Accepts]: Start accepts. Automaton has 175711 states and 283113 transitions. Word has length 252 [2023-04-03 01:25:21,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:25:21,954 INFO L495 AbstractCegarLoop]: Abstraction has 175711 states and 283113 transitions. [2023-04-03 01:25:21,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 4 states have call successors, (27), 4 states have call predecessors, (27), 3 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2023-04-03 01:25:21,955 INFO L276 IsEmpty]: Start isEmpty. Operand 175711 states and 283113 transitions. [2023-04-03 01:25:23,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2023-04-03 01:25:23,835 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:25:23,837 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 01:25:23,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-03 01:25:23,837 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:25:23,838 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:25:23,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1824183126, now seen corresponding path program 1 times [2023-04-03 01:25:23,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:25:23,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779231607] [2023-04-03 01:25:23,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:25:23,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:25:23,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:25:24,480 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 32 proven. 64 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2023-04-03 01:25:24,480 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:25:24,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779231607] [2023-04-03 01:25:24,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779231607] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:25:24,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929220255] [2023-04-03 01:25:24,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:25:24,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:25:24,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:25:24,482 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 01:25:24,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-03 01:25:24,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:25:24,851 INFO L262 TraceCheckSpWp]: Trace formula consists of 2361 conjuncts, 13 conjunts are in the unsatisfiable core [2023-04-03 01:25:24,859 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:25:25,128 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 225 proven. 4 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2023-04-03 01:25:25,128 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-03 01:25:25,679 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 36 proven. 54 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2023-04-03 01:25:25,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929220255] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-03 01:25:25,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [436984564] [2023-04-03 01:25:25,709 INFO L159 IcfgInterpreter]: Started Sifa with 143 locations of interest [2023-04-03 01:25:25,709 INFO L166 IcfgInterpreter]: Building call graph [2023-04-03 01:25:25,714 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-03 01:25:25,722 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-03 01:25:25,722 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-03 01:25:26,683 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 133 for LOIs [2023-04-03 01:25:26,764 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 178 for LOIs [2023-04-03 01:25:27,904 INFO L197 IcfgInterpreter]: Interpreting procedure init_model with input of size 110 for LOIs [2023-04-03 01:25:27,936 INFO L197 IcfgInterpreter]: Interpreting procedure start_simulation with input of size 162 for LOIs [2023-04-03 01:25:28,453 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2023-04-03 01:25:28,504 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 6561 conjuctions. This might take some time... [2023-04-03 01:25:31,725 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 6561 conjuctions.