/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-03 03:27:37,381 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-03 03:27:37,383 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-03 03:27:37,419 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-03 03:27:37,439 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-03 03:27:37,443 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-03 03:27:37,444 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-03 03:27:37,446 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-03 03:27:37,446 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-03 03:27:37,447 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-03 03:27:37,449 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-03 03:27:37,450 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-03 03:27:37,451 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-03 03:27:37,454 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-03 03:27:37,455 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-03 03:27:37,455 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-03 03:27:37,458 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-03 03:27:37,458 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-03 03:27:37,458 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-03 03:27:37,459 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-03 03:27:37,459 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-03 03:27:37,460 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-03 03:27:37,460 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-03 03:27:37,461 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-03 03:27:37,461 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-03 03:27:37,462 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-03 03:27:37,463 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-03 03:27:37,463 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-03 03:27:37,463 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-03 03:27:37,464 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-03 03:27:37,464 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-03 03:27:37,464 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-03 03:27:37,465 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-03 03:27:37,466 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 03:27:37,498 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-03 03:27:37,499 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-03 03:27:37,500 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-03 03:27:37,500 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-03 03:27:37,501 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-03 03:27:37,501 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-03 03:27:37,501 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-03 03:27:37,501 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-03 03:27:37,501 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-03 03:27:37,501 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-03 03:27:37,502 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-03 03:27:37,502 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-03 03:27:37,502 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-03 03:27:37,502 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-03 03:27:37,502 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-03 03:27:37,503 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-03 03:27:37,503 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-03 03:27:37,503 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-03 03:27:37,503 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-03 03:27:37,503 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-03 03:27:37,504 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-03 03:27:37,504 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-03 03:27:37,504 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-03 03:27:37,504 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-03 03:27:37,504 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-03 03:27:37,504 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-03 03:27:37,504 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-03 03:27:37,504 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-03 03:27:37,504 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-03 03:27:37,505 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-03 03:27:37,505 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-03 03:27:37,505 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-03 03:27:37,505 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 03:27:37,505 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-03 03:27:37,505 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-03 03:27:37,505 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-03 03:27:37,506 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-03 03:27:37,506 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-03 03:27:37,506 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-03 03:27:37,506 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-03 03:27:37,506 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-03 03:27:37,506 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-03 03:27:37,764 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-03 03:27:37,792 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-03 03:27:37,794 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-03 03:27:37,795 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-03 03:27:37,796 INFO L275 PluginConnector]: CDTParser initialized [2023-04-03 03:27:37,797 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2023-04-03 03:27:39,009 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-03 03:27:39,281 INFO L351 CDTParser]: Found 1 translation units. [2023-04-03 03:27:39,282 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2023-04-03 03:27:39,295 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/489b7413d/dbe6c742f79f466eacc84981449df586/FLAG5176dbc8d [2023-04-03 03:27:39,306 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/489b7413d/dbe6c742f79f466eacc84981449df586 [2023-04-03 03:27:39,308 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-03 03:27:39,309 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-03 03:27:39,310 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-03 03:27:39,310 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-03 03:27:39,315 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-03 03:27:39,316 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 03:27:39" (1/1) ... [2023-04-03 03:27:39,317 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f137291 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:27:39, skipping insertion in model container [2023-04-03 03:27:39,317 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 03:27:39" (1/1) ... [2023-04-03 03:27:39,322 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-03 03:27:39,376 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-03 03:27:39,587 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c[13674,13687] [2023-04-03 03:27:39,675 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 03:27:39,711 INFO L203 MainTranslator]: Completed pre-run [2023-04-03 03:27:39,803 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c[13674,13687] [2023-04-03 03:27:39,848 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 03:27:39,875 INFO L208 MainTranslator]: Completed translation [2023-04-03 03:27:39,875 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:27:39 WrapperNode [2023-04-03 03:27:39,875 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-03 03:27:39,877 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-03 03:27:39,877 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-03 03:27:39,877 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-03 03:27:39,888 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:27:39" (1/1) ... [2023-04-03 03:27:39,888 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:27:39" (1/1) ... [2023-04-03 03:27:39,917 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:27:39" (1/1) ... [2023-04-03 03:27:39,917 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:27:39" (1/1) ... [2023-04-03 03:27:39,969 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:27:39" (1/1) ... [2023-04-03 03:27:39,993 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:27:39" (1/1) ... [2023-04-03 03:27:40,007 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:27:39" (1/1) ... [2023-04-03 03:27:40,013 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:27:39" (1/1) ... [2023-04-03 03:27:40,028 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-03 03:27:40,029 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-03 03:27:40,029 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-03 03:27:40,030 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-03 03:27:40,031 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:27:39" (1/1) ... [2023-04-03 03:27:40,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 03:27:40,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 03:27:40,059 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 03:27:40,080 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 03:27:40,097 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-03 03:27:40,097 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-03 03:27:40,097 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-03 03:27:40,097 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-03 03:27:40,098 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-03 03:27:40,098 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-03 03:27:40,098 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-03 03:27:40,098 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-03 03:27:40,098 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-03 03:27:40,098 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-03 03:27:40,098 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-03 03:27:40,098 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-03 03:27:40,098 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-03 03:27:40,098 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-03 03:27:40,099 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-03 03:27:40,099 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-03 03:27:40,099 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-03 03:27:40,099 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-03 03:27:40,099 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-03 03:27:40,099 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-03 03:27:40,099 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-03 03:27:40,099 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-03 03:27:40,099 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-03 03:27:40,099 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-03 03:27:40,100 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-03 03:27:40,100 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-03 03:27:40,100 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-03 03:27:40,100 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-03 03:27:40,282 INFO L236 CfgBuilder]: Building ICFG [2023-04-03 03:27:40,284 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-03 03:27:41,186 INFO L277 CfgBuilder]: Performing block encoding [2023-04-03 03:27:41,457 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-03 03:27:41,458 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-03 03:27:41,462 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 03:27:41 BoogieIcfgContainer [2023-04-03 03:27:41,462 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-03 03:27:41,465 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-03 03:27:41,465 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-03 03:27:41,468 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-03 03:27:41,468 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.04 03:27:39" (1/3) ... [2023-04-03 03:27:41,469 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70cc82f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 03:27:41, skipping insertion in model container [2023-04-03 03:27:41,469 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:27:39" (2/3) ... [2023-04-03 03:27:41,469 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70cc82f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 03:27:41, skipping insertion in model container [2023-04-03 03:27:41,469 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 03:27:41" (3/3) ... [2023-04-03 03:27:41,471 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2023-04-03 03:27:41,487 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-03 03:27:41,487 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-03 03:27:41,548 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-03 03:27:41,554 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;@5103ba2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-03 03:27:41,554 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-03 03:27:41,560 INFO L276 IsEmpty]: Start isEmpty. Operand has 288 states, 275 states have (on average 1.690909090909091) internal successors, (465), 283 states have internal predecessors, (465), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-03 03:27:41,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-04-03 03:27:41,573 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:27:41,574 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 03:27:41,574 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:27:41,577 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:27:41,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1384664963, now seen corresponding path program 1 times [2023-04-03 03:27:41,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:27:41,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421804671] [2023-04-03 03:27:41,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:27:41,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:27:41,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:27:42,186 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 03:27:42,187 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:27:42,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421804671] [2023-04-03 03:27:42,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421804671] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:27:42,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:27:42,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 03:27:42,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291934044] [2023-04-03 03:27:42,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:27:42,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 03:27:42,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:27:42,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 03:27:42,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:27:42,246 INFO L87 Difference]: Start difference. First operand has 288 states, 275 states have (on average 1.690909090909091) internal successors, (465), 283 states have internal predecessors, (465), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:27:42,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:27:42,440 INFO L93 Difference]: Finished difference Result 500 states and 792 transitions. [2023-04-03 03:27:42,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 03:27:42,442 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 113 [2023-04-03 03:27:42,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:27:42,454 INFO L225 Difference]: With dead ends: 500 [2023-04-03 03:27:42,454 INFO L226 Difference]: Without dead ends: 362 [2023-04-03 03:27:42,458 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:27:42,460 INFO L413 NwaCegarLoop]: 573 mSDtfsCounter, 184 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 956 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 03:27:42,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 956 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 03:27:42,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2023-04-03 03:27:42,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 360. [2023-04-03 03:27:42,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 356 states have (on average 1.5112359550561798) internal successors, (538), 356 states have internal predecessors, (538), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:27:42,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 541 transitions. [2023-04-03 03:27:42,554 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 541 transitions. Word has length 113 [2023-04-03 03:27:42,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:27:42,555 INFO L495 AbstractCegarLoop]: Abstraction has 360 states and 541 transitions. [2023-04-03 03:27:42,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:27:42,556 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 541 transitions. [2023-04-03 03:27:42,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-04-03 03:27:42,566 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:27:42,566 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 03:27:42,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-03 03:27:42,566 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:27:42,567 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:27:42,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1530586918, now seen corresponding path program 1 times [2023-04-03 03:27:42,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:27:42,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837314461] [2023-04-03 03:27:42,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:27:42,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:27:42,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:27:42,842 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 03:27:42,843 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:27:42,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837314461] [2023-04-03 03:27:42,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837314461] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:27:42,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:27:42,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 03:27:42,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502473774] [2023-04-03 03:27:42,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:27:42,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 03:27:42,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:27:42,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 03:27:42,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:27:42,847 INFO L87 Difference]: Start difference. First operand 360 states and 541 transitions. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:27:42,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:27:42,968 INFO L93 Difference]: Finished difference Result 654 states and 1005 transitions. [2023-04-03 03:27:42,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 03:27:42,970 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 115 [2023-04-03 03:27:42,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:27:42,979 INFO L225 Difference]: With dead ends: 654 [2023-04-03 03:27:42,984 INFO L226 Difference]: Without dead ends: 466 [2023-04-03 03:27:42,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:27:42,987 INFO L413 NwaCegarLoop]: 376 mSDtfsCounter, 160 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 708 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 03:27:42,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 708 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 03:27:42,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2023-04-03 03:27:43,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 464. [2023-04-03 03:27:43,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 460 states have (on average 1.5217391304347827) internal successors, (700), 460 states have internal predecessors, (700), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:27:43,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 703 transitions. [2023-04-03 03:27:43,021 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 703 transitions. Word has length 115 [2023-04-03 03:27:43,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:27:43,024 INFO L495 AbstractCegarLoop]: Abstraction has 464 states and 703 transitions. [2023-04-03 03:27:43,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:27:43,024 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 703 transitions. [2023-04-03 03:27:43,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2023-04-03 03:27:43,030 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:27:43,031 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 03:27:43,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-03 03:27:43,031 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:27:43,032 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:27:43,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1055469435, now seen corresponding path program 1 times [2023-04-03 03:27:43,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:27:43,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966203611] [2023-04-03 03:27:43,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:27:43,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:27:43,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:27:43,249 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 03:27:43,250 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:27:43,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966203611] [2023-04-03 03:27:43,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966203611] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:27:43,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:27:43,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 03:27:43,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146795282] [2023-04-03 03:27:43,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:27:43,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 03:27:43,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:27:43,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 03:27:43,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:27:43,254 INFO L87 Difference]: Start difference. First operand 464 states and 703 transitions. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:27:43,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:27:43,361 INFO L93 Difference]: Finished difference Result 984 states and 1518 transitions. [2023-04-03 03:27:43,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 03:27:43,361 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 118 [2023-04-03 03:27:43,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:27:43,365 INFO L225 Difference]: With dead ends: 984 [2023-04-03 03:27:43,365 INFO L226 Difference]: Without dead ends: 694 [2023-04-03 03:27:43,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:27:43,372 INFO L413 NwaCegarLoop]: 468 mSDtfsCounter, 158 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 804 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 03:27:43,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 804 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 03:27:43,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2023-04-03 03:27:43,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 692. [2023-04-03 03:27:43,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 692 states, 688 states have (on average 1.5319767441860466) internal successors, (1054), 688 states have internal predecessors, (1054), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:27:43,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 1057 transitions. [2023-04-03 03:27:43,414 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 1057 transitions. Word has length 118 [2023-04-03 03:27:43,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:27:43,417 INFO L495 AbstractCegarLoop]: Abstraction has 692 states and 1057 transitions. [2023-04-03 03:27:43,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:27:43,417 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 1057 transitions. [2023-04-03 03:27:43,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2023-04-03 03:27:43,418 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:27:43,418 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 03:27:43,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-03 03:27:43,419 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:27:43,419 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:27:43,419 INFO L85 PathProgramCache]: Analyzing trace with hash -407570700, now seen corresponding path program 1 times [2023-04-03 03:27:43,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:27:43,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940053735] [2023-04-03 03:27:43,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:27:43,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:27:43,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:27:43,602 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 03:27:43,602 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:27:43,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940053735] [2023-04-03 03:27:43,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940053735] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:27:43,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:27:43,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 03:27:43,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341617131] [2023-04-03 03:27:43,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:27:43,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 03:27:43,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:27:43,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 03:27:43,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:27:43,605 INFO L87 Difference]: Start difference. First operand 692 states and 1057 transitions. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:27:43,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:27:43,730 INFO L93 Difference]: Finished difference Result 1522 states and 2359 transitions. [2023-04-03 03:27:43,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 03:27:43,731 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 120 [2023-04-03 03:27:43,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:27:43,736 INFO L225 Difference]: With dead ends: 1522 [2023-04-03 03:27:43,736 INFO L226 Difference]: Without dead ends: 1004 [2023-04-03 03:27:43,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:27:43,746 INFO L413 NwaCegarLoop]: 385 mSDtfsCounter, 157 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 725 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 03:27:43,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 725 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 03:27:43,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1004 states. [2023-04-03 03:27:43,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1004 to 1002. [2023-04-03 03:27:43,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1002 states, 998 states have (on average 1.5440881763527055) internal successors, (1541), 998 states have internal predecessors, (1541), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:27:43,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1002 states to 1002 states and 1544 transitions. [2023-04-03 03:27:43,810 INFO L78 Accepts]: Start accepts. Automaton has 1002 states and 1544 transitions. Word has length 120 [2023-04-03 03:27:43,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:27:43,810 INFO L495 AbstractCegarLoop]: Abstraction has 1002 states and 1544 transitions. [2023-04-03 03:27:43,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:27:43,811 INFO L276 IsEmpty]: Start isEmpty. Operand 1002 states and 1544 transitions. [2023-04-03 03:27:43,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-04-03 03:27:43,812 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:27:43,812 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, 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 03:27:43,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-03 03:27:43,812 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:27:43,813 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:27:43,813 INFO L85 PathProgramCache]: Analyzing trace with hash 644533202, now seen corresponding path program 1 times [2023-04-03 03:27:43,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:27:43,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028688305] [2023-04-03 03:27:43,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:27:43,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:27:43,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:27:43,964 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 03:27:43,964 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:27:43,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028688305] [2023-04-03 03:27:43,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028688305] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:27:43,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:27:43,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 03:27:43,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772794741] [2023-04-03 03:27:43,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:27:43,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 03:27:43,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:27:43,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 03:27:43,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:27:43,970 INFO L87 Difference]: Start difference. First operand 1002 states and 1544 transitions. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:27:44,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:27:44,188 INFO L93 Difference]: Finished difference Result 2434 states and 3775 transitions. [2023-04-03 03:27:44,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 03:27:44,190 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 123 [2023-04-03 03:27:44,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:27:44,196 INFO L225 Difference]: With dead ends: 2434 [2023-04-03 03:27:44,196 INFO L226 Difference]: Without dead ends: 1628 [2023-04-03 03:27:44,198 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:27:44,199 INFO L413 NwaCegarLoop]: 433 mSDtfsCounter, 151 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 770 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 03:27:44,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 770 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 03:27:44,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1628 states. [2023-04-03 03:27:44,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1628 to 1626. [2023-04-03 03:27:44,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1626 states, 1622 states have (on average 1.5400739827373613) internal successors, (2498), 1622 states have internal predecessors, (2498), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:27:44,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1626 states to 1626 states and 2501 transitions. [2023-04-03 03:27:44,350 INFO L78 Accepts]: Start accepts. Automaton has 1626 states and 2501 transitions. Word has length 123 [2023-04-03 03:27:44,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:27:44,350 INFO L495 AbstractCegarLoop]: Abstraction has 1626 states and 2501 transitions. [2023-04-03 03:27:44,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:27:44,351 INFO L276 IsEmpty]: Start isEmpty. Operand 1626 states and 2501 transitions. [2023-04-03 03:27:44,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-04-03 03:27:44,352 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:27:44,352 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, 1, 1, 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 03:27:44,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-03 03:27:44,352 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:27:44,352 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:27:44,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1970007948, now seen corresponding path program 1 times [2023-04-03 03:27:44,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:27:44,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625163240] [2023-04-03 03:27:44,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:27:44,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:27:44,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:27:44,510 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 03:27:44,510 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:27:44,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625163240] [2023-04-03 03:27:44,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625163240] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:27:44,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:27:44,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 03:27:44,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443275138] [2023-04-03 03:27:44,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:27:44,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 03:27:44,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:27:44,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 03:27:44,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:27:44,512 INFO L87 Difference]: Start difference. First operand 1626 states and 2501 transitions. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:27:44,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:27:44,800 INFO L93 Difference]: Finished difference Result 3884 states and 6020 transitions. [2023-04-03 03:27:44,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 03:27:44,801 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 125 [2023-04-03 03:27:44,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:27:44,811 INFO L225 Difference]: With dead ends: 3884 [2023-04-03 03:27:44,811 INFO L226 Difference]: Without dead ends: 2454 [2023-04-03 03:27:44,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:27:44,815 INFO L413 NwaCegarLoop]: 386 mSDtfsCounter, 150 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 727 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 03:27:44,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 727 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 03:27:44,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2454 states. [2023-04-03 03:27:45,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2454 to 2452. [2023-04-03 03:27:45,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2452 states, 2448 states have (on average 1.5465686274509804) internal successors, (3786), 2448 states have internal predecessors, (3786), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:27:45,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2452 states to 2452 states and 3789 transitions. [2023-04-03 03:27:45,029 INFO L78 Accepts]: Start accepts. Automaton has 2452 states and 3789 transitions. Word has length 125 [2023-04-03 03:27:45,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:27:45,030 INFO L495 AbstractCegarLoop]: Abstraction has 2452 states and 3789 transitions. [2023-04-03 03:27:45,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:27:45,030 INFO L276 IsEmpty]: Start isEmpty. Operand 2452 states and 3789 transitions. [2023-04-03 03:27:45,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-04-03 03:27:45,031 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:27:45,031 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, 1, 1, 1, 1, 1, 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 03:27:45,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-03 03:27:45,032 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:27:45,032 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:27:45,032 INFO L85 PathProgramCache]: Analyzing trace with hash -729850713, now seen corresponding path program 1 times [2023-04-03 03:27:45,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:27:45,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814347046] [2023-04-03 03:27:45,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:27:45,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:27:45,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:27:45,166 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 03:27:45,166 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:27:45,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814347046] [2023-04-03 03:27:45,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814347046] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:27:45,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:27:45,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 03:27:45,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553832557] [2023-04-03 03:27:45,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:27:45,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 03:27:45,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:27:45,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 03:27:45,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:27:45,169 INFO L87 Difference]: Start difference. First operand 2452 states and 3789 transitions. Second operand has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:27:45,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:27:45,647 INFO L93 Difference]: Finished difference Result 6380 states and 9848 transitions. [2023-04-03 03:27:45,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 03:27:45,648 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 128 [2023-04-03 03:27:45,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:27:45,666 INFO L225 Difference]: With dead ends: 6380 [2023-04-03 03:27:45,666 INFO L226 Difference]: Without dead ends: 4146 [2023-04-03 03:27:45,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:27:45,674 INFO L413 NwaCegarLoop]: 398 mSDtfsCounter, 144 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 736 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 03:27:45,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 736 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 03:27:45,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4146 states. [2023-04-03 03:27:46,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4146 to 4144. [2023-04-03 03:27:46,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4144 states, 4140 states have (on average 1.5318840579710145) internal successors, (6342), 4140 states have internal predecessors, (6342), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:27:46,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4144 states to 4144 states and 6345 transitions. [2023-04-03 03:27:46,114 INFO L78 Accepts]: Start accepts. Automaton has 4144 states and 6345 transitions. Word has length 128 [2023-04-03 03:27:46,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:27:46,114 INFO L495 AbstractCegarLoop]: Abstraction has 4144 states and 6345 transitions. [2023-04-03 03:27:46,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:27:46,115 INFO L276 IsEmpty]: Start isEmpty. Operand 4144 states and 6345 transitions. [2023-04-03 03:27:46,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-04-03 03:27:46,116 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:27:46,116 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, 1, 1, 1, 1, 1, 1, 1, 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 03:27:46,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-03 03:27:46,117 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:27:46,117 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:27:46,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1499837307, now seen corresponding path program 1 times [2023-04-03 03:27:46,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:27:46,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455755757] [2023-04-03 03:27:46,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:27:46,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:27:46,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:27:46,254 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 03:27:46,254 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:27:46,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455755757] [2023-04-03 03:27:46,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455755757] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:27:46,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:27:46,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 03:27:46,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157269308] [2023-04-03 03:27:46,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:27:46,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 03:27:46,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:27:46,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 03:27:46,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:27:46,256 INFO L87 Difference]: Start difference. First operand 4144 states and 6345 transitions. Second operand has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:27:46,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:27:46,820 INFO L93 Difference]: Finished difference Result 10326 states and 15885 transitions. [2023-04-03 03:27:46,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 03:27:46,821 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 130 [2023-04-03 03:27:46,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:27:46,847 INFO L225 Difference]: With dead ends: 10326 [2023-04-03 03:27:46,847 INFO L226 Difference]: Without dead ends: 6400 [2023-04-03 03:27:46,856 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:27:46,857 INFO L413 NwaCegarLoop]: 387 mSDtfsCounter, 143 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 729 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 03:27:46,858 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 729 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 03:27:46,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6400 states. [2023-04-03 03:27:47,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6400 to 6398. [2023-04-03 03:27:47,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6398 states, 6394 states have (on average 1.5362840162652487) internal successors, (9823), 6394 states have internal predecessors, (9823), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:27:47,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6398 states to 6398 states and 9826 transitions. [2023-04-03 03:27:47,394 INFO L78 Accepts]: Start accepts. Automaton has 6398 states and 9826 transitions. Word has length 130 [2023-04-03 03:27:47,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:27:47,394 INFO L495 AbstractCegarLoop]: Abstraction has 6398 states and 9826 transitions. [2023-04-03 03:27:47,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:27:47,395 INFO L276 IsEmpty]: Start isEmpty. Operand 6398 states and 9826 transitions. [2023-04-03 03:27:47,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2023-04-03 03:27:47,396 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:27:47,396 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:27:47,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-03 03:27:47,396 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:27:47,397 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:27:47,397 INFO L85 PathProgramCache]: Analyzing trace with hash 2026390519, now seen corresponding path program 1 times [2023-04-03 03:27:47,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:27:47,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587947375] [2023-04-03 03:27:47,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:27:47,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:27:47,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:27:47,663 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 03:27:47,663 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:27:47,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587947375] [2023-04-03 03:27:47,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587947375] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:27:47,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:27:47,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-03 03:27:47,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869717271] [2023-04-03 03:27:47,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:27:47,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-03 03:27:47,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:27:47,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-03 03:27:47,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-03 03:27:47,666 INFO L87 Difference]: Start difference. First operand 6398 states and 9826 transitions. Second operand has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:27:48,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:27:48,800 INFO L93 Difference]: Finished difference Result 16022 states and 24692 transitions. [2023-04-03 03:27:48,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-03 03:27:48,801 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 133 [2023-04-03 03:27:48,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:27:48,852 INFO L225 Difference]: With dead ends: 16022 [2023-04-03 03:27:48,852 INFO L226 Difference]: Without dead ends: 9810 [2023-04-03 03:27:48,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-04-03 03:27:48,866 INFO L413 NwaCegarLoop]: 393 mSDtfsCounter, 1233 mSDsluCounter, 3189 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1233 SdHoareTripleChecker+Valid, 3582 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-03 03:27:48,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1233 Valid, 3582 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-03 03:27:48,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9810 states. [2023-04-03 03:27:49,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9810 to 9753. [2023-04-03 03:27:49,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9753 states, 9749 states have (on average 1.5424146066263207) internal successors, (15037), 9749 states have internal predecessors, (15037), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:27:49,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9753 states to 9753 states and 15040 transitions. [2023-04-03 03:27:49,682 INFO L78 Accepts]: Start accepts. Automaton has 9753 states and 15040 transitions. Word has length 133 [2023-04-03 03:27:49,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:27:49,683 INFO L495 AbstractCegarLoop]: Abstraction has 9753 states and 15040 transitions. [2023-04-03 03:27:49,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:27:49,689 INFO L276 IsEmpty]: Start isEmpty. Operand 9753 states and 15040 transitions. [2023-04-03 03:27:49,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2023-04-03 03:27:49,691 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:27:49,691 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:27:49,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-03 03:27:49,691 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:27:49,692 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:27:49,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1672571625, now seen corresponding path program 1 times [2023-04-03 03:27:49,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:27:49,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254254860] [2023-04-03 03:27:49,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:27:49,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:27:49,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:27:49,871 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 03:27:49,871 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:27:49,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254254860] [2023-04-03 03:27:49,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254254860] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:27:49,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:27:49,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-03 03:27:49,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319498764] [2023-04-03 03:27:49,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:27:49,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-03 03:27:49,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:27:49,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-03 03:27:49,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-03 03:27:49,874 INFO L87 Difference]: Start difference. First operand 9753 states and 15040 transitions. Second operand has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:27:50,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:27:50,820 INFO L93 Difference]: Finished difference Result 19268 states and 29733 transitions. [2023-04-03 03:27:50,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-03 03:27:50,820 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 134 [2023-04-03 03:27:50,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:27:50,847 INFO L225 Difference]: With dead ends: 19268 [2023-04-03 03:27:50,847 INFO L226 Difference]: Without dead ends: 9755 [2023-04-03 03:27:50,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-03 03:27:50,870 INFO L413 NwaCegarLoop]: 380 mSDtfsCounter, 301 mSDsluCounter, 712 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 1092 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 03:27:50,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [301 Valid, 1092 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 03:27:50,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9755 states. [2023-04-03 03:27:51,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9755 to 9746. [2023-04-03 03:27:51,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9746 states, 9742 states have (on average 1.5393143091767605) internal successors, (14996), 9742 states have internal predecessors, (14996), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:27:51,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9746 states to 9746 states and 14999 transitions. [2023-04-03 03:27:51,687 INFO L78 Accepts]: Start accepts. Automaton has 9746 states and 14999 transitions. Word has length 134 [2023-04-03 03:27:51,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:27:51,688 INFO L495 AbstractCegarLoop]: Abstraction has 9746 states and 14999 transitions. [2023-04-03 03:27:51,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:27:51,688 INFO L276 IsEmpty]: Start isEmpty. Operand 9746 states and 14999 transitions. [2023-04-03 03:27:51,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2023-04-03 03:27:51,689 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:27:51,690 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:27:51,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-03 03:27:51,690 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:27:51,690 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:27:51,691 INFO L85 PathProgramCache]: Analyzing trace with hash 535394514, now seen corresponding path program 1 times [2023-04-03 03:27:51,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:27:51,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242793976] [2023-04-03 03:27:51,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:27:51,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:27:51,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:27:52,168 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 03:27:52,168 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:27:52,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242793976] [2023-04-03 03:27:52,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242793976] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:27:52,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:27:52,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 03:27:52,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801134127] [2023-04-03 03:27:52,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:27:52,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 03:27:52,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:27:52,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 03:27:52,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 03:27:52,170 INFO L87 Difference]: Start difference. First operand 9746 states and 14999 transitions. Second operand has 5 states, 5 states have (on average 28.0) internal successors, (140), 5 states have internal predecessors, (140), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:27:53,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:27:53,394 INFO L93 Difference]: Finished difference Result 15596 states and 23769 transitions. [2023-04-03 03:27:53,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-03 03:27:53,395 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 28.0) internal successors, (140), 5 states have internal predecessors, (140), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 143 [2023-04-03 03:27:53,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:27:53,436 INFO L225 Difference]: With dead ends: 15596 [2023-04-03 03:27:53,436 INFO L226 Difference]: Without dead ends: 15594 [2023-04-03 03:27:53,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-03 03:27:53,445 INFO L413 NwaCegarLoop]: 531 mSDtfsCounter, 309 mSDsluCounter, 1289 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 1820 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 03:27:53,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [309 Valid, 1820 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 03:27:53,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15594 states. [2023-04-03 03:27:54,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15594 to 9870. [2023-04-03 03:27:54,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9870 states, 9866 states have (on average 1.5251368335698359) internal successors, (15047), 9866 states have internal predecessors, (15047), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:27:54,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9870 states to 9870 states and 15050 transitions. [2023-04-03 03:27:54,848 INFO L78 Accepts]: Start accepts. Automaton has 9870 states and 15050 transitions. Word has length 143 [2023-04-03 03:27:54,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:27:54,849 INFO L495 AbstractCegarLoop]: Abstraction has 9870 states and 15050 transitions. [2023-04-03 03:27:54,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.0) internal successors, (140), 5 states have internal predecessors, (140), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:27:54,849 INFO L276 IsEmpty]: Start isEmpty. Operand 9870 states and 15050 transitions. [2023-04-03 03:27:54,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2023-04-03 03:27:54,851 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:27:54,852 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:27:54,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-03 03:27:54,852 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:27:54,852 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:27:54,852 INFO L85 PathProgramCache]: Analyzing trace with hash 448635072, now seen corresponding path program 1 times [2023-04-03 03:27:54,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:27:54,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817666515] [2023-04-03 03:27:54,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:27:54,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:27:54,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:27:59,875 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-03 03:27:59,876 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:27:59,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817666515] [2023-04-03 03:27:59,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817666515] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 03:27:59,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791583571] [2023-04-03 03:27:59,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:27:59,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 03:27:59,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 03:27:59,880 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 03:27:59,881 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 03:28:00,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:28:00,191 INFO L262 TraceCheckSpWp]: Trace formula consists of 1413 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-03 03:28:00,200 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 03:28:00,418 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-03 03:28:00,418 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 03:28:00,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791583571] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:28:00,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 03:28:00,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [13] total 15 [2023-04-03 03:28:00,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930952287] [2023-04-03 03:28:00,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:28:00,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-03 03:28:00,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:28:00,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-03 03:28:00,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2023-04-03 03:28:00,421 INFO L87 Difference]: Start difference. First operand 9870 states and 15050 transitions. Second operand has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:28:01,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:28:01,986 INFO L93 Difference]: Finished difference Result 29119 states and 44368 transitions. [2023-04-03 03:28:01,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-03 03:28:01,987 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 155 [2023-04-03 03:28:01,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:28:02,030 INFO L225 Difference]: With dead ends: 29119 [2023-04-03 03:28:02,030 INFO L226 Difference]: Without dead ends: 19272 [2023-04-03 03:28:02,060 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2023-04-03 03:28:02,061 INFO L413 NwaCegarLoop]: 382 mSDtfsCounter, 1035 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1035 SdHoareTripleChecker+Valid, 745 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 03:28:02,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1035 Valid, 745 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 03:28:02,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19272 states. [2023-04-03 03:28:03,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19272 to 19270. [2023-04-03 03:28:03,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19270 states, 19266 states have (on average 1.5185300529430084) internal successors, (29256), 19266 states have internal predecessors, (29256), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:28:03,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19270 states to 19270 states and 29259 transitions. [2023-04-03 03:28:03,983 INFO L78 Accepts]: Start accepts. Automaton has 19270 states and 29259 transitions. Word has length 155 [2023-04-03 03:28:03,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:28:03,984 INFO L495 AbstractCegarLoop]: Abstraction has 19270 states and 29259 transitions. [2023-04-03 03:28:03,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:28:03,984 INFO L276 IsEmpty]: Start isEmpty. Operand 19270 states and 29259 transitions. [2023-04-03 03:28:03,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2023-04-03 03:28:03,987 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:28:03,987 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:28:04,001 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 03:28:04,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-04-03 03:28:04,198 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:28:04,198 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:28:04,199 INFO L85 PathProgramCache]: Analyzing trace with hash -235767342, now seen corresponding path program 1 times [2023-04-03 03:28:04,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:28:04,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884684383] [2023-04-03 03:28:04,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:28:04,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:28:04,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:28:04,333 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-03 03:28:04,334 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:28:04,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884684383] [2023-04-03 03:28:04,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884684383] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:28:04,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:28:04,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 03:28:04,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523959805] [2023-04-03 03:28:04,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:28:04,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 03:28:04,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:28:04,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 03:28:04,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:28:04,336 INFO L87 Difference]: Start difference. First operand 19270 states and 29259 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:28:06,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:28:06,589 INFO L93 Difference]: Finished difference Result 44445 states and 67684 transitions. [2023-04-03 03:28:06,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 03:28:06,590 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 156 [2023-04-03 03:28:06,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:28:06,657 INFO L225 Difference]: With dead ends: 44445 [2023-04-03 03:28:06,657 INFO L226 Difference]: Without dead ends: 25563 [2023-04-03 03:28:06,713 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:28:06,714 INFO L413 NwaCegarLoop]: 390 mSDtfsCounter, 150 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 742 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 03:28:06,714 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 742 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 03:28:06,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25563 states. [2023-04-03 03:28:08,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25563 to 25561. [2023-04-03 03:28:08,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25561 states, 25557 states have (on average 1.5073365418476348) internal successors, (38523), 25557 states have internal predecessors, (38523), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:28:09,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25561 states to 25561 states and 38526 transitions. [2023-04-03 03:28:09,027 INFO L78 Accepts]: Start accepts. Automaton has 25561 states and 38526 transitions. Word has length 156 [2023-04-03 03:28:09,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:28:09,028 INFO L495 AbstractCegarLoop]: Abstraction has 25561 states and 38526 transitions. [2023-04-03 03:28:09,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:28:09,028 INFO L276 IsEmpty]: Start isEmpty. Operand 25561 states and 38526 transitions. [2023-04-03 03:28:09,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2023-04-03 03:28:09,030 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:28:09,031 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:28:09,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-04-03 03:28:09,031 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:28:09,031 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:28:09,031 INFO L85 PathProgramCache]: Analyzing trace with hash 836343117, now seen corresponding path program 1 times [2023-04-03 03:28:09,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:28:09,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193735167] [2023-04-03 03:28:09,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:28:09,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:28:09,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:28:09,155 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-03 03:28:09,156 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:28:09,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193735167] [2023-04-03 03:28:09,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193735167] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:28:09,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:28:09,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 03:28:09,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525197374] [2023-04-03 03:28:09,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:28:09,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 03:28:09,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:28:09,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 03:28:09,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:28:09,158 INFO L87 Difference]: Start difference. First operand 25561 states and 38526 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:28:13,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:28:13,683 INFO L93 Difference]: Finished difference Result 75049 states and 112974 transitions. [2023-04-03 03:28:13,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 03:28:13,684 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 157 [2023-04-03 03:28:13,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:28:13,851 INFO L225 Difference]: With dead ends: 75049 [2023-04-03 03:28:13,851 INFO L226 Difference]: Without dead ends: 49607 [2023-04-03 03:28:13,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:28:13,920 INFO L413 NwaCegarLoop]: 707 mSDtfsCounter, 268 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 1069 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 03:28:13,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 1069 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 03:28:13,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49607 states. [2023-04-03 03:28:18,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49607 to 49605. [2023-04-03 03:28:18,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49605 states, 49601 states have (on average 1.4986794621076187) internal successors, (74336), 49601 states have internal predecessors, (74336), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:28:19,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49605 states to 49605 states and 74339 transitions. [2023-04-03 03:28:19,015 INFO L78 Accepts]: Start accepts. Automaton has 49605 states and 74339 transitions. Word has length 157 [2023-04-03 03:28:19,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:28:19,015 INFO L495 AbstractCegarLoop]: Abstraction has 49605 states and 74339 transitions. [2023-04-03 03:28:19,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:28:19,016 INFO L276 IsEmpty]: Start isEmpty. Operand 49605 states and 74339 transitions. [2023-04-03 03:28:19,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2023-04-03 03:28:19,019 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:28:19,019 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:28:19,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-04-03 03:28:19,020 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:28:19,020 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:28:19,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1716728910, now seen corresponding path program 1 times [2023-04-03 03:28:19,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:28:19,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847007359] [2023-04-03 03:28:19,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:28:19,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:28:19,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:28:19,118 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-03 03:28:19,118 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:28:19,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847007359] [2023-04-03 03:28:19,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847007359] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:28:19,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:28:19,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 03:28:19,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920151134] [2023-04-03 03:28:19,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:28:19,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 03:28:19,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:28:19,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 03:28:19,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:28:19,121 INFO L87 Difference]: Start difference. First operand 49605 states and 74339 transitions. Second operand has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:28:29,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:28:29,700 INFO L93 Difference]: Finished difference Result 148697 states and 222835 transitions. [2023-04-03 03:28:29,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 03:28:29,701 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 157 [2023-04-03 03:28:29,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:28:29,940 INFO L225 Difference]: With dead ends: 148697 [2023-04-03 03:28:29,940 INFO L226 Difference]: Without dead ends: 99139 [2023-04-03 03:28:30,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:28:30,026 INFO L413 NwaCegarLoop]: 379 mSDtfsCounter, 370 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 749 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 03:28:30,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [370 Valid, 749 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 03:28:30,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99139 states. [2023-04-03 03:28:36,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99139 to 49617. [2023-04-03 03:28:36,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49617 states, 49613 states have (on average 1.4985991574788866) internal successors, (74350), 49613 states have internal predecessors, (74350), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:28:36,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49617 states to 49617 states and 74353 transitions. [2023-04-03 03:28:36,168 INFO L78 Accepts]: Start accepts. Automaton has 49617 states and 74353 transitions. Word has length 157 [2023-04-03 03:28:36,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:28:36,169 INFO L495 AbstractCegarLoop]: Abstraction has 49617 states and 74353 transitions. [2023-04-03 03:28:36,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:28:36,169 INFO L276 IsEmpty]: Start isEmpty. Operand 49617 states and 74353 transitions. [2023-04-03 03:28:36,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2023-04-03 03:28:36,173 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:28:36,173 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:28:36,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-04-03 03:28:36,173 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:28:36,174 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:28:36,174 INFO L85 PathProgramCache]: Analyzing trace with hash 901630882, now seen corresponding path program 1 times [2023-04-03 03:28:36,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:28:36,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838608243] [2023-04-03 03:28:36,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:28:36,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:28:36,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:28:36,276 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-03 03:28:36,277 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:28:36,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838608243] [2023-04-03 03:28:36,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838608243] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:28:36,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:28:36,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 03:28:36,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546907976] [2023-04-03 03:28:36,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:28:36,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 03:28:36,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:28:36,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 03:28:36,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:28:36,278 INFO L87 Difference]: Start difference. First operand 49617 states and 74353 transitions. Second operand has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:28:44,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:28:44,410 INFO L93 Difference]: Finished difference Result 115903 states and 174317 transitions. [2023-04-03 03:28:44,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 03:28:44,410 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 158 [2023-04-03 03:28:44,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:28:44,550 INFO L225 Difference]: With dead ends: 115903 [2023-04-03 03:28:44,550 INFO L226 Difference]: Without dead ends: 66911 [2023-04-03 03:28:44,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:28:44,609 INFO L413 NwaCegarLoop]: 393 mSDtfsCounter, 157 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 744 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 03:28:44,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 744 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 03:28:44,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66911 states. [2023-04-03 03:28:52,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66911 to 66909. [2023-04-03 03:28:52,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66909 states, 66905 states have (on average 1.4854196248411928) internal successors, (99382), 66905 states have internal predecessors, (99382), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:28:52,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66909 states to 66909 states and 99385 transitions. [2023-04-03 03:28:52,504 INFO L78 Accepts]: Start accepts. Automaton has 66909 states and 99385 transitions. Word has length 158 [2023-04-03 03:28:52,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:28:52,505 INFO L495 AbstractCegarLoop]: Abstraction has 66909 states and 99385 transitions. [2023-04-03 03:28:52,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:28:52,505 INFO L276 IsEmpty]: Start isEmpty. Operand 66909 states and 99385 transitions. [2023-04-03 03:28:52,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2023-04-03 03:28:52,508 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:28:52,508 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:28:52,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-04-03 03:28:52,508 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:28:52,509 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:28:52,509 INFO L85 PathProgramCache]: Analyzing trace with hash 888035608, now seen corresponding path program 1 times [2023-04-03 03:28:52,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:28:52,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768553655] [2023-04-03 03:28:52,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:28:52,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:28:52,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:28:54,587 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-03 03:28:54,587 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:28:54,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768553655] [2023-04-03 03:28:54,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768553655] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 03:28:54,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488216029] [2023-04-03 03:28:54,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:28:54,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 03:28:54,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 03:28:54,589 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 03:28:54,592 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 03:28:54,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:28:54,945 INFO L262 TraceCheckSpWp]: Trace formula consists of 1416 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-03 03:28:54,951 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 03:28:54,995 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-03 03:28:54,996 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 03:28:54,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488216029] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:28:54,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 03:28:54,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [13] total 15 [2023-04-03 03:28:54,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682491526] [2023-04-03 03:28:54,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:28:54,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-03 03:28:54,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:28:54,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-03 03:28:54,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2023-04-03 03:28:54,998 INFO L87 Difference]: Start difference. First operand 66909 states and 99385 transitions. Second operand has 4 states, 4 states have (on average 37.25) internal successors, (149), 4 states have internal predecessors, (149), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:29:03,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:29:03,623 INFO L93 Difference]: Finished difference Result 134142 states and 199222 transitions. [2023-04-03 03:29:03,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-03 03:29:03,624 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.25) internal successors, (149), 4 states have internal predecessors, (149), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 158 [2023-04-03 03:29:03,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:29:03,768 INFO L225 Difference]: With dead ends: 134142 [2023-04-03 03:29:03,768 INFO L226 Difference]: Without dead ends: 67244 [2023-04-03 03:29:03,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2023-04-03 03:29:03,839 INFO L413 NwaCegarLoop]: 508 mSDtfsCounter, 1018 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1018 SdHoareTripleChecker+Valid, 867 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 03:29:03,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1018 Valid, 867 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 03:29:03,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67244 states. [2023-04-03 03:29:12,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67244 to 66974. [2023-04-03 03:29:12,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66974 states, 66970 states have (on average 1.4854263102881888) internal successors, (99479), 66970 states have internal predecessors, (99479), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:29:12,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66974 states to 66974 states and 99482 transitions. [2023-04-03 03:29:12,607 INFO L78 Accepts]: Start accepts. Automaton has 66974 states and 99482 transitions. Word has length 158 [2023-04-03 03:29:12,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:29:12,607 INFO L495 AbstractCegarLoop]: Abstraction has 66974 states and 99482 transitions. [2023-04-03 03:29:12,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.25) internal successors, (149), 4 states have internal predecessors, (149), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:29:12,607 INFO L276 IsEmpty]: Start isEmpty. Operand 66974 states and 99482 transitions. [2023-04-03 03:29:12,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2023-04-03 03:29:12,610 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:29:12,610 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:29:12,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-03 03:29:12,819 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,SelfDestructingSolverStorable16 [2023-04-03 03:29:12,819 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:29:12,820 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:29:12,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1702278444, now seen corresponding path program 1 times [2023-04-03 03:29:12,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:29:12,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012088649] [2023-04-03 03:29:12,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:29:12,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:29:12,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:29:12,917 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-03 03:29:12,917 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:29:12,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012088649] [2023-04-03 03:29:12,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012088649] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:29:12,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:29:12,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 03:29:12,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630298978] [2023-04-03 03:29:12,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:29:12,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 03:29:12,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:29:12,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 03:29:12,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:29:12,919 INFO L87 Difference]: Start difference. First operand 66974 states and 99482 transitions. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:29:30,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:29:30,651 INFO L93 Difference]: Finished difference Result 200873 states and 298375 transitions. [2023-04-03 03:29:30,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 03:29:30,652 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 160 [2023-04-03 03:29:30,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:29:30,986 INFO L225 Difference]: With dead ends: 200873 [2023-04-03 03:29:30,986 INFO L226 Difference]: Without dead ends: 133923 [2023-04-03 03:29:31,070 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:29:31,070 INFO L413 NwaCegarLoop]: 379 mSDtfsCounter, 394 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 749 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 03:29:31,071 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [394 Valid, 749 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 03:29:31,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133923 states. [2023-04-03 03:29:41,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133923 to 66984. [2023-04-03 03:29:41,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66984 states, 66980 states have (on average 1.4853836966258585) internal successors, (99491), 66980 states have internal predecessors, (99491), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:29:41,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66984 states to 66984 states and 99494 transitions. [2023-04-03 03:29:41,426 INFO L78 Accepts]: Start accepts. Automaton has 66984 states and 99494 transitions. Word has length 160 [2023-04-03 03:29:41,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:29:41,427 INFO L495 AbstractCegarLoop]: Abstraction has 66984 states and 99494 transitions. [2023-04-03 03:29:41,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:29:41,427 INFO L276 IsEmpty]: Start isEmpty. Operand 66984 states and 99494 transitions. [2023-04-03 03:29:41,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2023-04-03 03:29:41,431 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:29:41,431 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:29:41,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-04-03 03:29:41,432 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:29:41,432 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:29:41,432 INFO L85 PathProgramCache]: Analyzing trace with hash -855140254, now seen corresponding path program 1 times [2023-04-03 03:29:41,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:29:41,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754237288] [2023-04-03 03:29:41,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:29:41,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:29:41,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:29:43,737 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-03 03:29:43,737 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:29:43,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754237288] [2023-04-03 03:29:43,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754237288] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 03:29:43,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499899637] [2023-04-03 03:29:43,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:29:43,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 03:29:43,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 03:29:43,741 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 03:29:43,745 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 03:29:44,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:29:44,051 INFO L262 TraceCheckSpWp]: Trace formula consists of 1423 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-03 03:29:44,057 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 03:29:44,232 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-03 03:29:44,233 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 03:29:44,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499899637] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:29:44,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 03:29:44,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [13] total 15 [2023-04-03 03:29:44,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058481048] [2023-04-03 03:29:44,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:29:44,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-03 03:29:44,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:29:44,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-03 03:29:44,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2023-04-03 03:29:44,234 INFO L87 Difference]: Start difference. First operand 66984 states and 99494 transitions. Second operand has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)