/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain EqDomain -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 12:51:34,276 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 12:51:34,277 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 12:51:34,315 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-01 12:51:34,334 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 12:51:34,336 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 12:51:34,338 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 12:51:34,342 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 12:51:34,342 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 12:51:34,343 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 12:51:34,345 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 12:51:34,349 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 12:51:34,349 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 12:51:34,351 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 12:51:34,352 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 12:51:34,353 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 12:51:34,359 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 12:51:34,359 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 12:51:34,359 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 12:51:34,360 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 12:51:34,360 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 12:51:34,361 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2023-04-01 12:51:34,365 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 12:51:34,365 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 12:51:34,366 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 12:51:34,368 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 12:51:34,397 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 12:51:34,398 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 12:51:34,398 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 12:51:34,398 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 12:51:34,399 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 12:51:34,399 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 12:51:34,399 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 12:51:34,399 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 12:51:34,400 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 12:51:34,400 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 12:51:34,400 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 12:51:34,400 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 12:51:34,401 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 12:51:34,401 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 12:51:34,401 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 12:51:34,401 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 12:51:34,401 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 12:51:34,401 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 12:51:34,402 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 12:51:34,402 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 12:51:34,402 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 12:51:34,402 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 12:51:34,402 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 12:51:34,402 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 12:51:34,402 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 12:51:34,403 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 12:51:34,403 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 12:51:34,403 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 12:51:34,403 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 12:51:34,403 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 12:51:34,403 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 12:51:34,404 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 12:51:34,404 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 12:51:34,404 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 12:51:34,404 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 12:51:34,404 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 12:51:34,404 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 12:51:34,404 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 12:51:34,405 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 12:51:34,405 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 12:51:34,405 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 12:51:34,405 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 12:51:34,585 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 12:51:34,609 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 12:51:34,611 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 12:51:34,612 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 12:51:34,612 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 12:51:34,613 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-01 12:51:35,729 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 12:51:35,944 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 12:51:35,944 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-01 12:51:35,955 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9b0da1d56/60b26afa07e944258e27b4173819d196/FLAG8d61b4b1d [2023-04-01 12:51:35,968 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9b0da1d56/60b26afa07e944258e27b4173819d196 [2023-04-01 12:51:35,970 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 12:51:35,972 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 12:51:35,972 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 12:51:35,973 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 12:51:35,980 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 12:51:35,981 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:51:35" (1/1) ... [2023-04-01 12:51:35,981 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d722ee8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:51:35, skipping insertion in model container [2023-04-01 12:51:35,982 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:51:35" (1/1) ... [2023-04-01 12:51:35,987 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 12:51:36,034 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 12:51:36,352 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.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[13490,13503] [2023-04-01 12:51:36,438 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 12:51:36,459 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 12:51:36,532 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.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[13490,13503] [2023-04-01 12:51:36,590 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 12:51:36,608 INFO L208 MainTranslator]: Completed translation [2023-04-01 12:51:36,608 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:51:36 WrapperNode [2023-04-01 12:51:36,608 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 12:51:36,610 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 12:51:36,610 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 12:51:36,610 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 12:51:36,620 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:51:36" (1/1) ... [2023-04-01 12:51:36,620 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:51:36" (1/1) ... [2023-04-01 12:51:36,638 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:51:36" (1/1) ... [2023-04-01 12:51:36,639 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:51:36" (1/1) ... [2023-04-01 12:51:36,668 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:51:36" (1/1) ... [2023-04-01 12:51:36,682 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:51:36" (1/1) ... [2023-04-01 12:51:36,687 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:51:36" (1/1) ... [2023-04-01 12:51:36,692 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:51:36" (1/1) ... [2023-04-01 12:51:36,699 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 12:51:36,700 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 12:51:36,700 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 12:51:36,700 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 12:51:36,701 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:51:36" (1/1) ... [2023-04-01 12:51:36,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 12:51:36,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:51:36,734 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 12:51:36,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 12:51:36,779 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 12:51:36,779 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 12:51:36,779 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 12:51:36,780 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 12:51:36,780 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 12:51:36,780 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 12:51:36,780 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 12:51:36,780 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 12:51:36,780 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 12:51:36,780 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-01 12:51:36,781 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2023-04-01 12:51:36,781 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-01 12:51:36,781 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-01 12:51:36,781 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 12:51:36,781 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-01 12:51:36,781 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-01 12:51:36,781 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-01 12:51:36,781 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-01 12:51:36,782 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-01 12:51:36,782 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-01 12:51:36,782 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-01 12:51:36,782 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-01 12:51:36,782 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 12:51:36,782 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 12:51:36,782 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 12:51:36,782 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 12:51:36,782 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 12:51:36,783 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 12:51:36,783 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 12:51:37,005 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 12:51:37,007 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 12:51:38,023 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 12:51:38,332 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 12:51:38,333 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-01 12:51:38,336 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:51:38 BoogieIcfgContainer [2023-04-01 12:51:38,337 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 12:51:38,339 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 12:51:38,339 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 12:51:38,341 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 12:51:38,342 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 12:51:35" (1/3) ... [2023-04-01 12:51:38,342 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19603391 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:51:38, skipping insertion in model container [2023-04-01 12:51:38,342 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:51:36" (2/3) ... [2023-04-01 12:51:38,342 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19603391 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:51:38, skipping insertion in model container [2023-04-01 12:51:38,343 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:51:38" (3/3) ... [2023-04-01 12:51:38,346 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-01 12:51:38,360 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 12:51:38,360 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 12:51:38,421 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 12:51:38,428 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;@688ab5c9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 12:51:38,428 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 12:51:38,435 INFO L276 IsEmpty]: Start isEmpty. Operand has 276 states, 263 states have (on average 1.673003802281369) internal successors, (440), 271 states have internal predecessors, (440), 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) [2023-04-01 12:51:38,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-04-01 12:51:38,453 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:51:38,453 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] [2023-04-01 12:51:38,454 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:51:38,457 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:51:38,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1304659540, now seen corresponding path program 1 times [2023-04-01 12:51:38,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:51:38,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802672285] [2023-04-01 12:51:38,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:51:38,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:51:38,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:51:38,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:51:38,993 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:51:38,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802672285] [2023-04-01 12:51:38,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802672285] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:51:38,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:51:38,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:51:38,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841352517] [2023-04-01 12:51:38,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:51:39,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:51:39,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:51:39,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:51:39,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:51:39,026 INFO L87 Difference]: Start difference. First operand has 276 states, 263 states have (on average 1.673003802281369) internal successors, (440), 271 states have internal predecessors, (440), 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 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 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) [2023-04-01 12:51:39,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:51:39,267 INFO L93 Difference]: Finished difference Result 488 states and 765 transitions. [2023-04-01 12:51:39,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:51:39,270 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 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 101 [2023-04-01 12:51:39,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:51:39,286 INFO L225 Difference]: With dead ends: 488 [2023-04-01 12:51:39,286 INFO L226 Difference]: Without dead ends: 350 [2023-04-01 12:51:39,290 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 [2023-04-01 12:51:39,294 INFO L413 NwaCegarLoop]: 548 mSDtfsCounter, 183 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 906 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 [2023-04-01 12:51:39,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 906 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:51:39,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2023-04-01 12:51:39,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 348. [2023-04-01 12:51:39,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 344 states have (on average 1.5290697674418605) internal successors, (526), 344 states have internal predecessors, (526), 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) [2023-04-01 12:51:39,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 529 transitions. [2023-04-01 12:51:39,388 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 529 transitions. Word has length 101 [2023-04-01 12:51:39,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:51:39,388 INFO L495 AbstractCegarLoop]: Abstraction has 348 states and 529 transitions. [2023-04-01 12:51:39,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 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) [2023-04-01 12:51:39,389 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 529 transitions. [2023-04-01 12:51:39,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-04-01 12:51:39,391 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:51:39,392 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] [2023-04-01 12:51:39,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 12:51:39,392 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:51:39,395 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:51:39,396 INFO L85 PathProgramCache]: Analyzing trace with hash -587967180, now seen corresponding path program 1 times [2023-04-01 12:51:39,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:51:39,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218896043] [2023-04-01 12:51:39,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:51:39,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:51:39,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:51:39,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:51:39,655 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:51:39,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218896043] [2023-04-01 12:51:39,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218896043] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:51:39,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:51:39,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:51:39,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703844506] [2023-04-01 12:51:39,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:51:39,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:51:39,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:51:39,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:51:39,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:51:39,659 INFO L87 Difference]: Start difference. First operand 348 states and 529 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 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) [2023-04-01 12:51:39,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:51:39,791 INFO L93 Difference]: Finished difference Result 642 states and 993 transitions. [2023-04-01 12:51:39,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:51:39,794 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 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 103 [2023-04-01 12:51:39,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:51:39,802 INFO L225 Difference]: With dead ends: 642 [2023-04-01 12:51:39,802 INFO L226 Difference]: Without dead ends: 454 [2023-04-01 12:51:39,808 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 [2023-04-01 12:51:39,809 INFO L413 NwaCegarLoop]: 364 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, 696 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 [2023-04-01 12:51:39,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 696 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:51:39,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2023-04-01 12:51:39,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 452. [2023-04-01 12:51:39,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 448 states have (on average 1.5357142857142858) internal successors, (688), 448 states have internal predecessors, (688), 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) [2023-04-01 12:51:39,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 691 transitions. [2023-04-01 12:51:39,839 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 691 transitions. Word has length 103 [2023-04-01 12:51:39,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:51:39,840 INFO L495 AbstractCegarLoop]: Abstraction has 452 states and 691 transitions. [2023-04-01 12:51:39,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 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) [2023-04-01 12:51:39,841 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 691 transitions. [2023-04-01 12:51:39,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-04-01 12:51:39,848 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:51:39,848 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] [2023-04-01 12:51:39,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 12:51:39,849 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:51:39,849 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:51:39,849 INFO L85 PathProgramCache]: Analyzing trace with hash 40230641, now seen corresponding path program 1 times [2023-04-01 12:51:39,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:51:39,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256098306] [2023-04-01 12:51:39,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:51:39,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:51:39,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:51:40,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:51:40,060 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:51:40,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256098306] [2023-04-01 12:51:40,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256098306] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:51:40,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:51:40,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:51:40,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821066167] [2023-04-01 12:51:40,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:51:40,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:51:40,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:51:40,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:51:40,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:51:40,064 INFO L87 Difference]: Start difference. First operand 452 states and 691 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 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) [2023-04-01 12:51:40,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:51:40,232 INFO L93 Difference]: Finished difference Result 972 states and 1506 transitions. [2023-04-01 12:51:40,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:51:40,233 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 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 106 [2023-04-01 12:51:40,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:51:40,238 INFO L225 Difference]: With dead ends: 972 [2023-04-01 12:51:40,238 INFO L226 Difference]: Without dead ends: 682 [2023-04-01 12:51:40,242 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 [2023-04-01 12:51:40,245 INFO L413 NwaCegarLoop]: 456 mSDtfsCounter, 158 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 780 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 [2023-04-01 12:51:40,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 780 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:51:40,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2023-04-01 12:51:40,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 680. [2023-04-01 12:51:40,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 680 states, 676 states have (on average 1.5414201183431953) internal successors, (1042), 676 states have internal predecessors, (1042), 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) [2023-04-01 12:51:40,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 1045 transitions. [2023-04-01 12:51:40,302 INFO L78 Accepts]: Start accepts. Automaton has 680 states and 1045 transitions. Word has length 106 [2023-04-01 12:51:40,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:51:40,304 INFO L495 AbstractCegarLoop]: Abstraction has 680 states and 1045 transitions. [2023-04-01 12:51:40,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 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) [2023-04-01 12:51:40,304 INFO L276 IsEmpty]: Start isEmpty. Operand 680 states and 1045 transitions. [2023-04-01 12:51:40,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-04-01 12:51:40,311 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:51:40,311 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] [2023-04-01 12:51:40,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 12:51:40,312 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:51:40,313 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:51:40,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1097941156, now seen corresponding path program 1 times [2023-04-01 12:51:40,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:51:40,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278782416] [2023-04-01 12:51:40,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:51:40,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:51:40,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:51:40,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:51:40,493 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:51:40,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278782416] [2023-04-01 12:51:40,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278782416] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:51:40,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:51:40,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:51:40,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824253298] [2023-04-01 12:51:40,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:51:40,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:51:40,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:51:40,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:51:40,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:51:40,495 INFO L87 Difference]: Start difference. First operand 680 states and 1045 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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) [2023-04-01 12:51:40,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:51:40,634 INFO L93 Difference]: Finished difference Result 1510 states and 2347 transitions. [2023-04-01 12:51:40,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:51:40,635 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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 108 [2023-04-01 12:51:40,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:51:40,639 INFO L225 Difference]: With dead ends: 1510 [2023-04-01 12:51:40,639 INFO L226 Difference]: Without dead ends: 992 [2023-04-01 12:51:40,640 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 [2023-04-01 12:51:40,643 INFO L413 NwaCegarLoop]: 373 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, 713 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 [2023-04-01 12:51:40,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 713 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:51:40,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 992 states. [2023-04-01 12:51:40,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 992 to 990. [2023-04-01 12:51:40,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 990 states, 986 states have (on average 1.550709939148073) internal successors, (1529), 986 states have internal predecessors, (1529), 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) [2023-04-01 12:51:40,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 990 states to 990 states and 1532 transitions. [2023-04-01 12:51:40,709 INFO L78 Accepts]: Start accepts. Automaton has 990 states and 1532 transitions. Word has length 108 [2023-04-01 12:51:40,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:51:40,710 INFO L495 AbstractCegarLoop]: Abstraction has 990 states and 1532 transitions. [2023-04-01 12:51:40,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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) [2023-04-01 12:51:40,710 INFO L276 IsEmpty]: Start isEmpty. Operand 990 states and 1532 transitions. [2023-04-01 12:51:40,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-04-01 12:51:40,711 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:51:40,711 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] [2023-04-01 12:51:40,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 12:51:40,712 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:51:40,712 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:51:40,712 INFO L85 PathProgramCache]: Analyzing trace with hash 801943656, now seen corresponding path program 1 times [2023-04-01 12:51:40,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:51:40,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995360227] [2023-04-01 12:51:40,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:51:40,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:51:40,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:51:40,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:51:40,866 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:51:40,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995360227] [2023-04-01 12:51:40,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995360227] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:51:40,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:51:40,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:51:40,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856357150] [2023-04-01 12:51:40,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:51:40,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:51:40,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:51:40,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:51:40,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:51:40,872 INFO L87 Difference]: Start difference. First operand 990 states and 1532 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 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) [2023-04-01 12:51:41,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:51:41,093 INFO L93 Difference]: Finished difference Result 2422 states and 3763 transitions. [2023-04-01 12:51:41,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:51:41,094 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 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 111 [2023-04-01 12:51:41,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:51:41,101 INFO L225 Difference]: With dead ends: 2422 [2023-04-01 12:51:41,101 INFO L226 Difference]: Without dead ends: 1616 [2023-04-01 12:51:41,103 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 [2023-04-01 12:51:41,103 INFO L413 NwaCegarLoop]: 421 mSDtfsCounter, 151 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 746 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 [2023-04-01 12:51:41,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 746 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:51:41,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1616 states. [2023-04-01 12:51:41,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1616 to 1614. [2023-04-01 12:51:41,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1614 states, 1610 states have (on average 1.5440993788819877) internal successors, (2486), 1610 states have internal predecessors, (2486), 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) [2023-04-01 12:51:41,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1614 states to 1614 states and 2489 transitions. [2023-04-01 12:51:41,238 INFO L78 Accepts]: Start accepts. Automaton has 1614 states and 2489 transitions. Word has length 111 [2023-04-01 12:51:41,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:51:41,239 INFO L495 AbstractCegarLoop]: Abstraction has 1614 states and 2489 transitions. [2023-04-01 12:51:41,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 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) [2023-04-01 12:51:41,239 INFO L276 IsEmpty]: Start isEmpty. Operand 1614 states and 2489 transitions. [2023-04-01 12:51:41,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-04-01 12:51:41,240 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:51:41,240 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] [2023-04-01 12:51:41,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 12:51:41,241 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:51:41,241 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:51:41,241 INFO L85 PathProgramCache]: Analyzing trace with hash -817065643, now seen corresponding path program 1 times [2023-04-01 12:51:41,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:51:41,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838062930] [2023-04-01 12:51:41,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:51:41,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:51:41,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:51:41,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:51:41,404 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:51:41,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838062930] [2023-04-01 12:51:41,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838062930] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:51:41,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:51:41,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:51:41,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815766321] [2023-04-01 12:51:41,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:51:41,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:51:41,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:51:41,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:51:41,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:51:41,406 INFO L87 Difference]: Start difference. First operand 1614 states and 2489 transitions. 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) [2023-04-01 12:51:41,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:51:41,733 INFO L93 Difference]: Finished difference Result 3872 states and 6008 transitions. [2023-04-01 12:51:41,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:51:41,734 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 [2023-04-01 12:51:41,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:51:41,745 INFO L225 Difference]: With dead ends: 3872 [2023-04-01 12:51:41,745 INFO L226 Difference]: Without dead ends: 2442 [2023-04-01 12:51:41,748 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 [2023-04-01 12:51:41,749 INFO L413 NwaCegarLoop]: 374 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, 715 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 [2023-04-01 12:51:41,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 715 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:51:41,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2442 states. [2023-04-01 12:51:41,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2442 to 2440. [2023-04-01 12:51:42,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2440 states, 2436 states have (on average 1.5492610837438423) internal successors, (3774), 2436 states have internal predecessors, (3774), 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) [2023-04-01 12:51:42,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2440 states to 2440 states and 3777 transitions. [2023-04-01 12:51:42,010 INFO L78 Accepts]: Start accepts. Automaton has 2440 states and 3777 transitions. Word has length 113 [2023-04-01 12:51:42,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:51:42,011 INFO L495 AbstractCegarLoop]: Abstraction has 2440 states and 3777 transitions. [2023-04-01 12:51:42,011 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) [2023-04-01 12:51:42,011 INFO L276 IsEmpty]: Start isEmpty. Operand 2440 states and 3777 transitions. [2023-04-01 12:51:42,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-04-01 12:51:42,012 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:51:42,012 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] [2023-04-01 12:51:42,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 12:51:42,013 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:51:42,013 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:51:42,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1813775096, now seen corresponding path program 1 times [2023-04-01 12:51:42,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:51:42,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709438720] [2023-04-01 12:51:42,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:51:42,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:51:42,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:51:42,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:51:42,146 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:51:42,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709438720] [2023-04-01 12:51:42,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709438720] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:51:42,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:51:42,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:51:42,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199127868] [2023-04-01 12:51:42,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:51:42,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:51:42,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:51:42,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:51:42,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:51:42,148 INFO L87 Difference]: Start difference. First operand 2440 states and 3777 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 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) [2023-04-01 12:51:42,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:51:42,698 INFO L93 Difference]: Finished difference Result 6368 states and 9836 transitions. [2023-04-01 12:51:42,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:51:42,699 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 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 116 [2023-04-01 12:51:42,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:51:42,716 INFO L225 Difference]: With dead ends: 6368 [2023-04-01 12:51:42,716 INFO L226 Difference]: Without dead ends: 4134 [2023-04-01 12:51:42,721 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 [2023-04-01 12:51:42,722 INFO L413 NwaCegarLoop]: 386 mSDtfsCounter, 144 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 712 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 [2023-04-01 12:51:42,722 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 712 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:51:42,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4134 states. [2023-04-01 12:51:43,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4134 to 4132. [2023-04-01 12:51:43,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4132 states, 4128 states have (on average 1.5334302325581395) internal successors, (6330), 4128 states have internal predecessors, (6330), 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) [2023-04-01 12:51:43,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4132 states to 4132 states and 6333 transitions. [2023-04-01 12:51:43,147 INFO L78 Accepts]: Start accepts. Automaton has 4132 states and 6333 transitions. Word has length 116 [2023-04-01 12:51:43,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:51:43,147 INFO L495 AbstractCegarLoop]: Abstraction has 4132 states and 6333 transitions. [2023-04-01 12:51:43,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 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) [2023-04-01 12:51:43,148 INFO L276 IsEmpty]: Start isEmpty. Operand 4132 states and 6333 transitions. [2023-04-01 12:51:43,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2023-04-01 12:51:43,149 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:51:43,149 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] [2023-04-01 12:51:43,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 12:51:43,149 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:51:43,150 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:51:43,150 INFO L85 PathProgramCache]: Analyzing trace with hash 796321723, now seen corresponding path program 1 times [2023-04-01 12:51:43,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:51:43,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332837430] [2023-04-01 12:51:43,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:51:43,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:51:43,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:51:43,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:51:43,271 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:51:43,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332837430] [2023-04-01 12:51:43,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332837430] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:51:43,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:51:43,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:51:43,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319601951] [2023-04-01 12:51:43,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:51:43,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:51:43,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:51:43,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:51:43,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:51:43,273 INFO L87 Difference]: Start difference. First operand 4132 states and 6333 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) [2023-04-01 12:51:43,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:51:43,884 INFO L93 Difference]: Finished difference Result 10314 states and 15873 transitions. [2023-04-01 12:51:43,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:51:43,885 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 [2023-04-01 12:51:43,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:51:43,911 INFO L225 Difference]: With dead ends: 10314 [2023-04-01 12:51:43,912 INFO L226 Difference]: Without dead ends: 6388 [2023-04-01 12:51:43,921 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 [2023-04-01 12:51:43,922 INFO L413 NwaCegarLoop]: 375 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, 717 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 [2023-04-01 12:51:43,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 717 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:51:43,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6388 states. [2023-04-01 12:51:44,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6388 to 6386. [2023-04-01 12:51:44,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6386 states, 6382 states have (on average 1.537292384832341) internal successors, (9811), 6382 states have internal predecessors, (9811), 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) [2023-04-01 12:51:44,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6386 states to 6386 states and 9814 transitions. [2023-04-01 12:51:44,559 INFO L78 Accepts]: Start accepts. Automaton has 6386 states and 9814 transitions. Word has length 118 [2023-04-01 12:51:44,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:51:44,560 INFO L495 AbstractCegarLoop]: Abstraction has 6386 states and 9814 transitions. [2023-04-01 12:51:44,560 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) [2023-04-01 12:51:44,560 INFO L276 IsEmpty]: Start isEmpty. Operand 6386 states and 9814 transitions. [2023-04-01 12:51:44,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-04-01 12:51:44,561 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:51:44,562 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] [2023-04-01 12:51:44,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-01 12:51:44,562 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:51:44,563 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:51:44,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1978831021, now seen corresponding path program 1 times [2023-04-01 12:51:44,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:51:44,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106832928] [2023-04-01 12:51:44,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:51:44,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:51:44,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:51:44,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:51:44,768 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:51:44,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106832928] [2023-04-01 12:51:44,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106832928] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:51:44,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:51:44,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 12:51:44,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379963934] [2023-04-01 12:51:44,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:51:44,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 12:51:44,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:51:44,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 12:51:44,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-01 12:51:44,774 INFO L87 Difference]: Start difference. First operand 6386 states and 9814 transitions. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 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) [2023-04-01 12:51:45,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:51:45,964 INFO L93 Difference]: Finished difference Result 16010 states and 24680 transitions. [2023-04-01 12:51:45,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 12:51:45,965 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 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 121 [2023-04-01 12:51:45,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:51:46,004 INFO L225 Difference]: With dead ends: 16010 [2023-04-01 12:51:46,005 INFO L226 Difference]: Without dead ends: 9798 [2023-04-01 12:51:46,018 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 [2023-04-01 12:51:46,019 INFO L413 NwaCegarLoop]: 381 mSDtfsCounter, 1233 mSDsluCounter, 3141 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1233 SdHoareTripleChecker+Valid, 3522 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 [2023-04-01 12:51:46,019 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1233 Valid, 3522 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 12:51:46,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9798 states. [2023-04-01 12:51:47,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9798 to 9741. [2023-04-01 12:51:47,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9741 states, 9737 states have (on average 1.54308308513916) internal successors, (15025), 9737 states have internal predecessors, (15025), 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) [2023-04-01 12:51:47,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9741 states to 9741 states and 15028 transitions. [2023-04-01 12:51:47,098 INFO L78 Accepts]: Start accepts. Automaton has 9741 states and 15028 transitions. Word has length 121 [2023-04-01 12:51:47,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:51:47,099 INFO L495 AbstractCegarLoop]: Abstraction has 9741 states and 15028 transitions. [2023-04-01 12:51:47,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 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) [2023-04-01 12:51:47,099 INFO L276 IsEmpty]: Start isEmpty. Operand 9741 states and 15028 transitions. [2023-04-01 12:51:47,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-04-01 12:51:47,101 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:51:47,101 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] [2023-04-01 12:51:47,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-01 12:51:47,101 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:51:47,102 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:51:47,102 INFO L85 PathProgramCache]: Analyzing trace with hash 1148051215, now seen corresponding path program 1 times [2023-04-01 12:51:47,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:51:47,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906937721] [2023-04-01 12:51:47,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:51:47,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:51:47,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:51:47,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:51:47,264 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:51:47,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906937721] [2023-04-01 12:51:47,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906937721] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:51:47,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:51:47,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 12:51:47,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92364598] [2023-04-01 12:51:47,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:51:47,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 12:51:47,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:51:47,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 12:51:47,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 12:51:47,267 INFO L87 Difference]: Start difference. First operand 9741 states and 15028 transitions. Second operand has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 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) [2023-04-01 12:51:48,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:51:48,368 INFO L93 Difference]: Finished difference Result 19256 states and 29721 transitions. [2023-04-01 12:51:48,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 12:51:48,369 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 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 122 [2023-04-01 12:51:48,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:51:48,412 INFO L225 Difference]: With dead ends: 19256 [2023-04-01 12:51:48,412 INFO L226 Difference]: Without dead ends: 9743 [2023-04-01 12:51:48,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 12:51:48,431 INFO L413 NwaCegarLoop]: 368 mSDtfsCounter, 301 mSDsluCounter, 688 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 1056 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 [2023-04-01 12:51:48,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [301 Valid, 1056 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:51:48,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9743 states. [2023-04-01 12:51:49,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9743 to 9734. [2023-04-01 12:51:49,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9734 states, 9730 states have (on average 1.5399794450154163) internal successors, (14984), 9730 states have internal predecessors, (14984), 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) [2023-04-01 12:51:49,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9734 states to 9734 states and 14987 transitions. [2023-04-01 12:51:49,226 INFO L78 Accepts]: Start accepts. Automaton has 9734 states and 14987 transitions. Word has length 122 [2023-04-01 12:51:49,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:51:49,227 INFO L495 AbstractCegarLoop]: Abstraction has 9734 states and 14987 transitions. [2023-04-01 12:51:49,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 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) [2023-04-01 12:51:49,227 INFO L276 IsEmpty]: Start isEmpty. Operand 9734 states and 14987 transitions. [2023-04-01 12:51:49,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-04-01 12:51:49,228 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:51:49,228 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] [2023-04-01 12:51:49,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-01 12:51:49,229 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:51:49,229 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:51:49,229 INFO L85 PathProgramCache]: Analyzing trace with hash 813657800, now seen corresponding path program 1 times [2023-04-01 12:51:49,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:51:49,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823162365] [2023-04-01 12:51:49,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:51:49,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:51:49,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:51:49,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:51:49,645 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:51:49,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823162365] [2023-04-01 12:51:49,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823162365] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:51:49,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:51:49,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 12:51:49,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457567388] [2023-04-01 12:51:49,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:51:49,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 12:51:49,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:51:49,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 12:51:49,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 12:51:49,647 INFO L87 Difference]: Start difference. First operand 9734 states and 14987 transitions. Second operand has 5 states, 5 states have (on average 25.6) internal successors, (128), 5 states have internal predecessors, (128), 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) [2023-04-01 12:51:51,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:51:51,391 INFO L93 Difference]: Finished difference Result 15584 states and 23757 transitions. [2023-04-01 12:51:51,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 12:51:51,392 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.6) internal successors, (128), 5 states have internal predecessors, (128), 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 131 [2023-04-01 12:51:51,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:51:51,431 INFO L225 Difference]: With dead ends: 15584 [2023-04-01 12:51:51,431 INFO L226 Difference]: Without dead ends: 15582 [2023-04-01 12:51:51,436 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 [2023-04-01 12:51:51,437 INFO L413 NwaCegarLoop]: 519 mSDtfsCounter, 309 mSDsluCounter, 1255 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 1774 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:51:51,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [309 Valid, 1774 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:51:51,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15582 states. [2023-04-01 12:51:52,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15582 to 9858. [2023-04-01 12:51:52,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9858 states, 9854 states have (on average 1.5257763344834585) internal successors, (15035), 9854 states have internal predecessors, (15035), 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) [2023-04-01 12:51:52,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9858 states to 9858 states and 15038 transitions. [2023-04-01 12:51:52,446 INFO L78 Accepts]: Start accepts. Automaton has 9858 states and 15038 transitions. Word has length 131 [2023-04-01 12:51:52,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:51:52,446 INFO L495 AbstractCegarLoop]: Abstraction has 9858 states and 15038 transitions. [2023-04-01 12:51:52,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.6) internal successors, (128), 5 states have internal predecessors, (128), 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) [2023-04-01 12:51:52,447 INFO L276 IsEmpty]: Start isEmpty. Operand 9858 states and 15038 transitions. [2023-04-01 12:51:52,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2023-04-01 12:51:52,449 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:51:52,449 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] [2023-04-01 12:51:52,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-01 12:51:52,449 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:51:52,450 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:51:52,450 INFO L85 PathProgramCache]: Analyzing trace with hash -2071015155, now seen corresponding path program 1 times [2023-04-01 12:51:52,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:51:52,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643302984] [2023-04-01 12:51:52,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:51:52,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:51:52,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:51:54,862 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:51:54,862 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:51:54,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643302984] [2023-04-01 12:51:54,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643302984] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 12:51:54,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103596976] [2023-04-01 12:51:54,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:51:54,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 12:51:54,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:51:54,866 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 12:51:54,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 12:51:55,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:51:55,184 INFO L262 TraceCheckSpWp]: Trace formula consists of 1381 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 12:51:55,192 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 12:51:55,390 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 12:51:55,391 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 12:51:55,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103596976] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:51:55,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 12:51:55,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [17] total 19 [2023-04-01 12:51:55,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81865093] [2023-04-01 12:51:55,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:51:55,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 12:51:55,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:51:55,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 12:51:55,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2023-04-01 12:51:55,393 INFO L87 Difference]: Start difference. First operand 9858 states and 15038 transitions. Second operand has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 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) [2023-04-01 12:51:57,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:51:57,292 INFO L93 Difference]: Finished difference Result 29083 states and 44332 transitions. [2023-04-01 12:51:57,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 12:51:57,293 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 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 [2023-04-01 12:51:57,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:51:57,335 INFO L225 Difference]: With dead ends: 29083 [2023-04-01 12:51:57,336 INFO L226 Difference]: Without dead ends: 19248 [2023-04-01 12:51:57,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2023-04-01 12:51:57,360 INFO L413 NwaCegarLoop]: 370 mSDtfsCounter, 1011 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1011 SdHoareTripleChecker+Valid, 721 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 [2023-04-01 12:51:57,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1011 Valid, 721 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:51:57,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19248 states. [2023-04-01 12:51:59,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19248 to 19246. [2023-04-01 12:51:59,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19246 states, 19242 states have (on average 1.519176800748363) internal successors, (29232), 19242 states have internal predecessors, (29232), 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) [2023-04-01 12:51:59,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19246 states to 19246 states and 29235 transitions. [2023-04-01 12:51:59,157 INFO L78 Accepts]: Start accepts. Automaton has 19246 states and 29235 transitions. Word has length 143 [2023-04-01 12:51:59,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:51:59,157 INFO L495 AbstractCegarLoop]: Abstraction has 19246 states and 29235 transitions. [2023-04-01 12:51:59,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 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) [2023-04-01 12:51:59,157 INFO L276 IsEmpty]: Start isEmpty. Operand 19246 states and 29235 transitions. [2023-04-01 12:51:59,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2023-04-01 12:51:59,160 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:51:59,160 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] [2023-04-01 12:51:59,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 12:51:59,369 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 [2023-04-01 12:51:59,370 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:51:59,370 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:51:59,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1441386865, now seen corresponding path program 1 times [2023-04-01 12:51:59,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:51:59,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497313631] [2023-04-01 12:51:59,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:51:59,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:51:59,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:51:59,500 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 12:51:59,500 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:51:59,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497313631] [2023-04-01 12:51:59,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497313631] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:51:59,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:51:59,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:51:59,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76769320] [2023-04-01 12:51:59,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:51:59,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:51:59,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:51:59,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:51:59,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:51:59,502 INFO L87 Difference]: Start difference. First operand 19246 states and 29235 transitions. Second operand has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 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) [2023-04-01 12:52:02,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:52:02,209 INFO L93 Difference]: Finished difference Result 44421 states and 67660 transitions. [2023-04-01 12:52:02,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:52:02,210 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 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 144 [2023-04-01 12:52:02,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:52:02,287 INFO L225 Difference]: With dead ends: 44421 [2023-04-01 12:52:02,287 INFO L226 Difference]: Without dead ends: 25539 [2023-04-01 12:52:02,323 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 [2023-04-01 12:52:02,324 INFO L413 NwaCegarLoop]: 378 mSDtfsCounter, 150 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 718 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 [2023-04-01 12:52:02,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 718 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:52:02,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25539 states. [2023-04-01 12:52:04,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25539 to 25537. [2023-04-01 12:52:04,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25537 states, 25533 states have (on average 1.507813417929738) internal successors, (38499), 25533 states have internal predecessors, (38499), 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) [2023-04-01 12:52:04,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25537 states to 25537 states and 38502 transitions. [2023-04-01 12:52:04,746 INFO L78 Accepts]: Start accepts. Automaton has 25537 states and 38502 transitions. Word has length 144 [2023-04-01 12:52:04,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:52:04,746 INFO L495 AbstractCegarLoop]: Abstraction has 25537 states and 38502 transitions. [2023-04-01 12:52:04,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 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) [2023-04-01 12:52:04,746 INFO L276 IsEmpty]: Start isEmpty. Operand 25537 states and 38502 transitions. [2023-04-01 12:52:04,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-04-01 12:52:04,749 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:52:04,749 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] [2023-04-01 12:52:04,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-04-01 12:52:04,749 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:52:04,749 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:52:04,750 INFO L85 PathProgramCache]: Analyzing trace with hash 423310448, now seen corresponding path program 1 times [2023-04-01 12:52:04,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:52:04,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157672727] [2023-04-01 12:52:04,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:52:04,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:52:04,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:52:04,966 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 12:52:04,966 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:52:04,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157672727] [2023-04-01 12:52:04,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157672727] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:52:04,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:52:04,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:52:04,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018764335] [2023-04-01 12:52:04,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:52:04,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:52:04,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:52:04,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:52:04,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:52:04,969 INFO L87 Difference]: Start difference. First operand 25537 states and 38502 transitions. Second operand has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 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) [2023-04-01 12:52:09,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:52:09,846 INFO L93 Difference]: Finished difference Result 76532 states and 115386 transitions. [2023-04-01 12:52:09,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:52:09,847 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 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 145 [2023-04-01 12:52:09,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:52:09,987 INFO L225 Difference]: With dead ends: 76532 [2023-04-01 12:52:09,988 INFO L226 Difference]: Without dead ends: 51038 [2023-04-01 12:52:10,042 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 [2023-04-01 12:52:10,042 INFO L413 NwaCegarLoop]: 367 mSDtfsCounter, 358 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 725 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 [2023-04-01 12:52:10,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [358 Valid, 725 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:52:10,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51038 states. [2023-04-01 12:52:13,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51038 to 25549. [2023-04-01 12:52:13,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25549 states, 25545 states have (on average 1.5076923076923077) internal successors, (38514), 25545 states have internal predecessors, (38514), 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) [2023-04-01 12:52:13,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25549 states to 25549 states and 38517 transitions. [2023-04-01 12:52:13,690 INFO L78 Accepts]: Start accepts. Automaton has 25549 states and 38517 transitions. Word has length 145 [2023-04-01 12:52:13,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:52:13,691 INFO L495 AbstractCegarLoop]: Abstraction has 25549 states and 38517 transitions. [2023-04-01 12:52:13,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 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) [2023-04-01 12:52:13,691 INFO L276 IsEmpty]: Start isEmpty. Operand 25549 states and 38517 transitions. [2023-04-01 12:52:13,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-04-01 12:52:13,694 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:52:13,694 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] [2023-04-01 12:52:13,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-04-01 12:52:13,694 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:52:13,694 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:52:13,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1542864015, now seen corresponding path program 1 times [2023-04-01 12:52:13,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:52:13,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121734296] [2023-04-01 12:52:13,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:52:13,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:52:13,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:52:13,801 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 12:52:13,801 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:52:13,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121734296] [2023-04-01 12:52:13,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121734296] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:52:13,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:52:13,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:52:13,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110976406] [2023-04-01 12:52:13,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:52:13,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:52:13,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:52:13,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:52:13,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:52:13,803 INFO L87 Difference]: Start difference. First operand 25549 states and 38517 transitions. Second operand has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 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) [2023-04-01 12:52:19,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:52:19,959 INFO L93 Difference]: Finished difference Result 74989 states and 112916 transitions. [2023-04-01 12:52:19,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:52:19,960 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 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 145 [2023-04-01 12:52:19,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:52:20,063 INFO L225 Difference]: With dead ends: 74989 [2023-04-01 12:52:20,063 INFO L226 Difference]: Without dead ends: 49571 [2023-04-01 12:52:20,096 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 [2023-04-01 12:52:20,096 INFO L413 NwaCegarLoop]: 574 mSDtfsCounter, 267 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 924 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:52:20,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [267 Valid, 924 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:52:20,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49571 states. [2023-04-01 12:52:26,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49571 to 49569. [2023-04-01 12:52:26,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49569 states, 49565 states have (on average 1.499082013517603) internal successors, (74302), 49565 states have internal predecessors, (74302), 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) [2023-04-01 12:52:26,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49569 states to 49569 states and 74305 transitions. [2023-04-01 12:52:26,355 INFO L78 Accepts]: Start accepts. Automaton has 49569 states and 74305 transitions. Word has length 145 [2023-04-01 12:52:26,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:52:26,355 INFO L495 AbstractCegarLoop]: Abstraction has 49569 states and 74305 transitions. [2023-04-01 12:52:26,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 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) [2023-04-01 12:52:26,356 INFO L276 IsEmpty]: Start isEmpty. Operand 49569 states and 74305 transitions. [2023-04-01 12:52:26,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2023-04-01 12:52:26,359 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:52:26,359 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] [2023-04-01 12:52:26,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-04-01 12:52:26,360 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:52:26,360 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:52:26,360 INFO L85 PathProgramCache]: Analyzing trace with hash -722243818, now seen corresponding path program 1 times [2023-04-01 12:52:26,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:52:26,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394716943] [2023-04-01 12:52:26,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:52:26,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:52:26,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:52:26,480 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 12:52:26,480 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:52:26,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394716943] [2023-04-01 12:52:26,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394716943] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:52:26,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:52:26,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:52:26,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902967171] [2023-04-01 12:52:26,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:52:26,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:52:26,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:52:26,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:52:26,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:52:26,482 INFO L87 Difference]: Start difference. First operand 49569 states and 74305 transitions. Second operand has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 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)