/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_floodmax.4.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 12:34:26,975 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 12:34:26,977 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 12:34:27,023 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 12:34:27,023 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 12:34:27,026 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 12:34:27,029 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 12:34:27,031 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 12:34:27,033 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 12:34:27,038 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 12:34:27,039 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 12:34:27,040 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 12:34:27,040 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 12:34:27,041 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 12:34:27,041 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 12:34:27,042 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 12:34:27,043 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 12:34:27,043 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 12:34:27,044 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 12:34:27,046 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 12:34:27,047 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 12:34:27,050 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 12:34:27,051 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 12:34:27,052 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 12:34:27,061 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 12:34:27,061 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 12:34:27,061 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 12:34:27,062 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 12:34:27,063 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 12:34:27,064 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 12:34:27,064 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 12:34:27,064 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 12:34:27,065 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 12:34:27,066 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 12:34:27,067 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 12:34:27,067 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 12:34:27,067 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 12:34:27,068 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 12:34:27,068 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 12:34:27,068 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 12:34:27,069 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 12:34:27,070 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 12:34:27,100 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 12:34:27,100 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 12:34:27,101 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 12:34:27,101 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 12:34:27,102 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 12:34:27,102 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 12:34:27,102 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 12:34:27,103 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 12:34:27,103 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 12:34:27,103 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 12:34:27,104 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 12:34:27,104 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 12:34:27,104 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 12:34:27,104 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 12:34:27,104 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 12:34:27,104 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 12:34:27,104 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 12:34:27,104 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 12:34:27,105 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 12:34:27,105 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 12:34:27,105 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 12:34:27,105 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 12:34:27,105 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 12:34:27,106 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 12:34:27,106 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 12:34:27,106 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 12:34:27,106 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 12:34:27,106 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 12:34:27,106 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 12:34:27,106 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 12:34:27,107 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 12:34:27,107 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 12:34:27,107 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 12:34:27,107 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 12:34:27,107 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 12:34:27,107 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 12:34:27,107 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 12:34:27,108 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 12:34:27,108 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 12:34:27,108 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 12:34:27,108 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 12:34:27,108 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 12:34:27,325 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 12:34:27,349 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 12:34:27,352 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 12:34:27,353 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 12:34:27,353 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 12:34:27,355 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2023-04-01 12:34:28,499 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 12:34:28,826 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 12:34:28,827 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2023-04-01 12:34:28,853 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31a9db04d/e85b55bde0a040c39ee2d73e9198c704/FLAG14a8bada7 [2023-04-01 12:34:28,868 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31a9db04d/e85b55bde0a040c39ee2d73e9198c704 [2023-04-01 12:34:28,872 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 12:34:28,873 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 12:34:28,874 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 12:34:28,874 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 12:34:28,877 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 12:34:28,878 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:34:28" (1/1) ... [2023-04-01 12:34:28,878 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70f800c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:34:28, skipping insertion in model container [2023-04-01 12:34:28,879 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:34:28" (1/1) ... [2023-04-01 12:34:28,891 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 12:34:28,960 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 12:34:29,319 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_floodmax.4.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[24502,24515] [2023-04-01 12:34:29,461 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 12:34:29,481 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 12:34:29,688 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_floodmax.4.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[24502,24515] [2023-04-01 12:34:29,781 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 12:34:29,797 INFO L208 MainTranslator]: Completed translation [2023-04-01 12:34:29,798 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:34:29 WrapperNode [2023-04-01 12:34:29,798 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 12:34:29,810 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 12:34:29,810 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 12:34:29,810 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 12:34:29,819 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:34:29" (1/1) ... [2023-04-01 12:34:29,819 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:34:29" (1/1) ... [2023-04-01 12:34:29,837 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:34:29" (1/1) ... [2023-04-01 12:34:29,838 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:34:29" (1/1) ... [2023-04-01 12:34:29,875 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:34:29" (1/1) ... [2023-04-01 12:34:29,900 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:34:29" (1/1) ... [2023-04-01 12:34:29,908 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:34:29" (1/1) ... [2023-04-01 12:34:29,915 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:34:29" (1/1) ... [2023-04-01 12:34:29,926 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 12:34:29,927 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 12:34:29,927 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 12:34:29,928 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 12:34:29,928 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:34:29" (1/1) ... [2023-04-01 12:34:29,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 12:34:29,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:34:29,962 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 12:34:29,988 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 12:34:30,004 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 12:34:30,004 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 12:34:30,004 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 12:34:30,005 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 12:34:30,005 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 12:34:30,005 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 12:34:30,005 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 12:34:30,007 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 12:34:30,007 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 12:34:30,007 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-01 12:34:30,007 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2023-04-01 12:34:30,007 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-01 12:34:30,007 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-01 12:34:30,007 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 12:34:30,007 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-01 12:34:30,007 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-01 12:34:30,008 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-01 12:34:30,008 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-01 12:34:30,008 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-01 12:34:30,008 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-01 12:34:30,008 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-01 12:34:30,009 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-01 12:34:30,009 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 12:34:30,009 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 12:34:30,009 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 12:34:30,009 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 12:34:30,009 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 12:34:30,009 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 12:34:30,009 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 12:34:30,217 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 12:34:30,219 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 12:34:31,662 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 12:34:32,102 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 12:34:32,103 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-01 12:34:32,108 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:34:32 BoogieIcfgContainer [2023-04-01 12:34:32,108 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 12:34:32,111 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 12:34:32,111 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 12:34:32,114 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 12:34:32,114 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 12:34:28" (1/3) ... [2023-04-01 12:34:32,115 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61511ce2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:34:32, skipping insertion in model container [2023-04-01 12:34:32,115 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:34:29" (2/3) ... [2023-04-01 12:34:32,115 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61511ce2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:34:32, skipping insertion in model container [2023-04-01 12:34:32,115 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:34:32" (3/3) ... [2023-04-01 12:34:32,116 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2023-04-01 12:34:32,133 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 12:34:32,134 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 12:34:32,205 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 12:34:32,211 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;@59f7740, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 12:34:32,211 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 12:34:32,218 INFO L276 IsEmpty]: Start isEmpty. Operand has 484 states, 471 states have (on average 1.70276008492569) internal successors, (802), 479 states have internal predecessors, (802), 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 12:34:32,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2023-04-01 12:34:32,234 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:34:32,235 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:34:32,235 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:34:32,239 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:34:32,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1257906570, now seen corresponding path program 1 times [2023-04-01 12:34:32,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:34:32,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711227624] [2023-04-01 12:34:32,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:34:32,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:34:32,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:34:33,757 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 12:34:33,758 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:34:33,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711227624] [2023-04-01 12:34:33,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711227624] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:34:33,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:34:33,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 12:34:33,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37141157] [2023-04-01 12:34:33,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:34:33,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 12:34:33,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:34:33,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 12:34:33,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 12:34:33,792 INFO L87 Difference]: Start difference. First operand has 484 states, 471 states have (on average 1.70276008492569) internal successors, (802), 479 states have internal predecessors, (802), 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 4 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 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 12:34:34,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:34:34,231 INFO L93 Difference]: Finished difference Result 1416 states and 2365 transitions. [2023-04-01 12:34:34,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 12:34:34,233 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 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 215 [2023-04-01 12:34:34,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:34:34,253 INFO L225 Difference]: With dead ends: 1416 [2023-04-01 12:34:34,254 INFO L226 Difference]: Without dead ends: 923 [2023-04-01 12:34:34,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 12:34:34,268 INFO L413 NwaCegarLoop]: 1223 mSDtfsCounter, 1754 mSDsluCounter, 726 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1754 SdHoareTripleChecker+Valid, 1949 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 12:34:34,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1754 Valid, 1949 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 12:34:34,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 923 states. [2023-04-01 12:34:34,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 923 to 921. [2023-04-01 12:34:34,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 921 states, 917 states have (on average 1.4034896401308614) internal successors, (1287), 917 states have internal predecessors, (1287), 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 12:34:34,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 921 states to 921 states and 1290 transitions. [2023-04-01 12:34:34,401 INFO L78 Accepts]: Start accepts. Automaton has 921 states and 1290 transitions. Word has length 215 [2023-04-01 12:34:34,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:34:34,401 INFO L495 AbstractCegarLoop]: Abstraction has 921 states and 1290 transitions. [2023-04-01 12:34:34,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 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 12:34:34,402 INFO L276 IsEmpty]: Start isEmpty. Operand 921 states and 1290 transitions. [2023-04-01 12:34:34,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2023-04-01 12:34:34,407 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:34:34,407 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:34:34,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 12:34:34,408 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:34:34,408 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:34:34,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1547491957, now seen corresponding path program 1 times [2023-04-01 12:34:34,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:34:34,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476446977] [2023-04-01 12:34:34,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:34:34,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:34:34,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:34:34,687 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 12:34:34,687 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:34:34,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476446977] [2023-04-01 12:34:34,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476446977] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:34:34,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:34:34,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:34:34,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700397375] [2023-04-01 12:34:34,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:34:34,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:34:34,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:34:34,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:34:34,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:34:34,694 INFO L87 Difference]: Start difference. First operand 921 states and 1290 transitions. Second operand has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 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 12:34:34,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:34:34,953 INFO L93 Difference]: Finished difference Result 2602 states and 3624 transitions. [2023-04-01 12:34:34,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:34:34,956 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 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 217 [2023-04-01 12:34:34,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:34:34,972 INFO L225 Difference]: With dead ends: 2602 [2023-04-01 12:34:34,972 INFO L226 Difference]: Without dead ends: 1806 [2023-04-01 12:34:34,978 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 12:34:34,980 INFO L413 NwaCegarLoop]: 1160 mSDtfsCounter, 543 mSDsluCounter, 600 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 543 SdHoareTripleChecker+Valid, 1760 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:34:34,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [543 Valid, 1760 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:34:34,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1806 states. [2023-04-01 12:34:35,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1806 to 1804. [2023-04-01 12:34:35,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1804 states, 1800 states have (on average 1.3977777777777778) internal successors, (2516), 1800 states have internal predecessors, (2516), 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 12:34:35,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1804 states to 1804 states and 2519 transitions. [2023-04-01 12:34:35,109 INFO L78 Accepts]: Start accepts. Automaton has 1804 states and 2519 transitions. Word has length 217 [2023-04-01 12:34:35,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:34:35,110 INFO L495 AbstractCegarLoop]: Abstraction has 1804 states and 2519 transitions. [2023-04-01 12:34:35,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 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 12:34:35,111 INFO L276 IsEmpty]: Start isEmpty. Operand 1804 states and 2519 transitions. [2023-04-01 12:34:35,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2023-04-01 12:34:35,118 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:34:35,118 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:34:35,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 12:34:35,118 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:34:35,119 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:34:35,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1941803802, now seen corresponding path program 1 times [2023-04-01 12:34:35,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:34:35,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47125451] [2023-04-01 12:34:35,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:34:35,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:34:35,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:34:35,329 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 12:34:35,329 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:34:35,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47125451] [2023-04-01 12:34:35,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47125451] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:34:35,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:34:35,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:34:35,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547128470] [2023-04-01 12:34:35,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:34:35,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:34:35,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:34:35,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:34:35,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:34:35,332 INFO L87 Difference]: Start difference. First operand 1804 states and 2519 transitions. Second operand has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 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 12:34:35,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:34:35,752 INFO L93 Difference]: Finished difference Result 5252 states and 7316 transitions. [2023-04-01 12:34:35,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:34:35,758 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 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 217 [2023-04-01 12:34:35,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:34:35,774 INFO L225 Difference]: With dead ends: 5252 [2023-04-01 12:34:35,774 INFO L226 Difference]: Without dead ends: 3584 [2023-04-01 12:34:35,781 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 12:34:35,785 INFO L413 NwaCegarLoop]: 1242 mSDtfsCounter, 652 mSDsluCounter, 620 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 652 SdHoareTripleChecker+Valid, 1862 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:34:35,786 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [652 Valid, 1862 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:34:35,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3584 states. [2023-04-01 12:34:36,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3584 to 1807. [2023-04-01 12:34:36,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1807 states, 1803 states have (on average 1.397115917914587) internal successors, (2519), 1803 states have internal predecessors, (2519), 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 12:34:36,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1807 states to 1807 states and 2522 transitions. [2023-04-01 12:34:36,033 INFO L78 Accepts]: Start accepts. Automaton has 1807 states and 2522 transitions. Word has length 217 [2023-04-01 12:34:36,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:34:36,033 INFO L495 AbstractCegarLoop]: Abstraction has 1807 states and 2522 transitions. [2023-04-01 12:34:36,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 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 12:34:36,034 INFO L276 IsEmpty]: Start isEmpty. Operand 1807 states and 2522 transitions. [2023-04-01 12:34:36,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2023-04-01 12:34:36,038 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:34:36,038 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:34:36,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 12:34:36,039 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:34:36,040 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:34:36,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1507846328, now seen corresponding path program 1 times [2023-04-01 12:34:36,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:34:36,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501406870] [2023-04-01 12:34:36,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:34:36,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:34:36,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:34:36,799 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 12:34:36,799 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:34:36,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501406870] [2023-04-01 12:34:36,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501406870] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:34:36,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:34:36,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 12:34:36,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144486577] [2023-04-01 12:34:36,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:34:36,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 12:34:36,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:34:36,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 12:34:36,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 12:34:36,802 INFO L87 Difference]: Start difference. First operand 1807 states and 2522 transitions. Second operand has 5 states, 5 states have (on average 43.0) internal successors, (215), 5 states have internal predecessors, (215), 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 12:34:37,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:34:37,416 INFO L93 Difference]: Finished difference Result 5211 states and 7253 transitions. [2023-04-01 12:34:37,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 12:34:37,416 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 43.0) internal successors, (215), 5 states have internal predecessors, (215), 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 218 [2023-04-01 12:34:37,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:34:37,431 INFO L225 Difference]: With dead ends: 5211 [2023-04-01 12:34:37,432 INFO L226 Difference]: Without dead ends: 3423 [2023-04-01 12:34:37,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 12:34:37,442 INFO L413 NwaCegarLoop]: 992 mSDtfsCounter, 1271 mSDsluCounter, 1183 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1271 SdHoareTripleChecker+Valid, 2175 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 12:34:37,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1271 Valid, 2175 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 12:34:37,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3423 states. [2023-04-01 12:34:37,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3423 to 3421. [2023-04-01 12:34:37,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3421 states, 3417 states have (on average 1.3819139596136962) internal successors, (4722), 3417 states have internal predecessors, (4722), 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 12:34:37,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3421 states to 3421 states and 4725 transitions. [2023-04-01 12:34:37,853 INFO L78 Accepts]: Start accepts. Automaton has 3421 states and 4725 transitions. Word has length 218 [2023-04-01 12:34:37,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:34:37,855 INFO L495 AbstractCegarLoop]: Abstraction has 3421 states and 4725 transitions. [2023-04-01 12:34:37,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 43.0) internal successors, (215), 5 states have internal predecessors, (215), 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 12:34:37,855 INFO L276 IsEmpty]: Start isEmpty. Operand 3421 states and 4725 transitions. [2023-04-01 12:34:37,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2023-04-01 12:34:37,863 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:34:37,863 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:34:37,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 12:34:37,864 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:34:37,865 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:34:37,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1113564035, now seen corresponding path program 1 times [2023-04-01 12:34:37,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:34:37,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374695658] [2023-04-01 12:34:37,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:34:37,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:34:38,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:34:38,451 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 12:34:38,451 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:34:38,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374695658] [2023-04-01 12:34:38,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374695658] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:34:38,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:34:38,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 12:34:38,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100293067] [2023-04-01 12:34:38,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:34:38,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 12:34:38,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:34:38,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 12:34:38,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 12:34:38,457 INFO L87 Difference]: Start difference. First operand 3421 states and 4725 transitions. Second operand has 4 states, 4 states have (on average 54.0) internal successors, (216), 4 states have internal predecessors, (216), 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 12:34:39,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:34:39,422 INFO L93 Difference]: Finished difference Result 9963 states and 13730 transitions. [2023-04-01 12:34:39,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 12:34:39,423 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 54.0) internal successors, (216), 4 states have internal predecessors, (216), 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 219 [2023-04-01 12:34:39,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:34:39,449 INFO L225 Difference]: With dead ends: 9963 [2023-04-01 12:34:39,449 INFO L226 Difference]: Without dead ends: 6684 [2023-04-01 12:34:39,457 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 12:34:39,457 INFO L413 NwaCegarLoop]: 985 mSDtfsCounter, 1421 mSDsluCounter, 597 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1421 SdHoareTripleChecker+Valid, 1582 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 12:34:39,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1421 Valid, 1582 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 12:34:39,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6684 states. [2023-04-01 12:34:40,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6684 to 6682. [2023-04-01 12:34:40,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6682 states, 6678 states have (on average 1.3722671458520515) internal successors, (9164), 6678 states have internal predecessors, (9164), 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 12:34:40,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6682 states to 6682 states and 9167 transitions. [2023-04-01 12:34:40,318 INFO L78 Accepts]: Start accepts. Automaton has 6682 states and 9167 transitions. Word has length 219 [2023-04-01 12:34:40,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:34:40,318 INFO L495 AbstractCegarLoop]: Abstraction has 6682 states and 9167 transitions. [2023-04-01 12:34:40,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 54.0) internal successors, (216), 4 states have internal predecessors, (216), 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 12:34:40,318 INFO L276 IsEmpty]: Start isEmpty. Operand 6682 states and 9167 transitions. [2023-04-01 12:34:40,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2023-04-01 12:34:40,332 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:34:40,332 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:34:40,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 12:34:40,333 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:34:40,333 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:34:40,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1437558928, now seen corresponding path program 1 times [2023-04-01 12:34:40,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:34:40,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470822872] [2023-04-01 12:34:40,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:34:40,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:34:40,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:34:41,024 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 12:34:41,024 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:34:41,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470822872] [2023-04-01 12:34:41,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470822872] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:34:41,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:34:41,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 12:34:41,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189853135] [2023-04-01 12:34:41,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:34:41,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 12:34:41,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:34:41,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 12:34:41,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 12:34:41,027 INFO L87 Difference]: Start difference. First operand 6682 states and 9167 transitions. Second operand has 4 states, 4 states have (on average 54.5) internal successors, (218), 4 states have internal predecessors, (218), 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 12:34:42,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:34:42,590 INFO L93 Difference]: Finished difference Result 19562 states and 26780 transitions. [2023-04-01 12:34:42,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 12:34:42,591 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 54.5) internal successors, (218), 4 states have internal predecessors, (218), 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 221 [2023-04-01 12:34:42,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:34:42,655 INFO L225 Difference]: With dead ends: 19562 [2023-04-01 12:34:42,655 INFO L226 Difference]: Without dead ends: 13026 [2023-04-01 12:34:42,670 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 12:34:42,672 INFO L413 NwaCegarLoop]: 970 mSDtfsCounter, 1400 mSDsluCounter, 589 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1400 SdHoareTripleChecker+Valid, 1559 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 12:34:42,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1400 Valid, 1559 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 12:34:42,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13026 states. [2023-04-01 12:34:44,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13026 to 13024. [2023-04-01 12:34:44,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13024 states, 13020 states have (on average 1.359831029185868) internal successors, (17705), 13020 states have internal predecessors, (17705), 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 12:34:44,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13024 states to 13024 states and 17708 transitions. [2023-04-01 12:34:44,171 INFO L78 Accepts]: Start accepts. Automaton has 13024 states and 17708 transitions. Word has length 221 [2023-04-01 12:34:44,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:34:44,171 INFO L495 AbstractCegarLoop]: Abstraction has 13024 states and 17708 transitions. [2023-04-01 12:34:44,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 54.5) internal successors, (218), 4 states have internal predecessors, (218), 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 12:34:44,172 INFO L276 IsEmpty]: Start isEmpty. Operand 13024 states and 17708 transitions. [2023-04-01 12:34:44,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2023-04-01 12:34:44,197 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:34:44,197 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:34:44,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 12:34:44,197 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:34:44,198 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:34:44,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1612663304, now seen corresponding path program 1 times [2023-04-01 12:34:44,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:34:44,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706162914] [2023-04-01 12:34:44,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:34:44,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:34:44,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:34:44,374 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 12:34:44,374 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:34:44,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706162914] [2023-04-01 12:34:44,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706162914] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:34:44,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:34:44,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:34:44,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692142702] [2023-04-01 12:34:44,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:34:44,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:34:44,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:34:44,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:34:44,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:34:44,376 INFO L87 Difference]: Start difference. First operand 13024 states and 17708 transitions. Second operand has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 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 12:34:47,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:34:47,084 INFO L93 Difference]: Finished difference Result 36987 states and 49957 transitions. [2023-04-01 12:34:47,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:34:47,084 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 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 223 [2023-04-01 12:34:47,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:34:47,153 INFO L225 Difference]: With dead ends: 36987 [2023-04-01 12:34:47,153 INFO L226 Difference]: Without dead ends: 25529 [2023-04-01 12:34:47,181 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 12:34:47,182 INFO L413 NwaCegarLoop]: 1174 mSDtfsCounter, 526 mSDsluCounter, 600 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 526 SdHoareTripleChecker+Valid, 1774 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:34:47,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [526 Valid, 1774 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:34:47,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25529 states. [2023-04-01 12:34:49,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25529 to 25527. [2023-04-01 12:34:49,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25527 states, 25523 states have (on average 1.3521921404223642) internal successors, (34512), 25523 states have internal predecessors, (34512), 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 12:34:49,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25527 states to 25527 states and 34515 transitions. [2023-04-01 12:34:49,704 INFO L78 Accepts]: Start accepts. Automaton has 25527 states and 34515 transitions. Word has length 223 [2023-04-01 12:34:49,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:34:49,705 INFO L495 AbstractCegarLoop]: Abstraction has 25527 states and 34515 transitions. [2023-04-01 12:34:49,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 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 12:34:49,705 INFO L276 IsEmpty]: Start isEmpty. Operand 25527 states and 34515 transitions. [2023-04-01 12:34:49,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2023-04-01 12:34:49,752 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:34:49,752 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:34:49,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 12:34:49,752 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:34:49,753 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:34:49,753 INFO L85 PathProgramCache]: Analyzing trace with hash -716407746, now seen corresponding path program 1 times [2023-04-01 12:34:49,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:34:49,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652398382] [2023-04-01 12:34:49,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:34:49,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:34:49,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:34:49,883 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 12:34:49,883 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:34:49,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652398382] [2023-04-01 12:34:49,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652398382] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:34:49,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:34:49,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:34:49,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158661693] [2023-04-01 12:34:49,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:34:49,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:34:49,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:34:49,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:34:49,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:34:49,885 INFO L87 Difference]: Start difference. First operand 25527 states and 34515 transitions. Second operand has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 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 12:34:54,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:34:54,244 INFO L93 Difference]: Finished difference Result 74638 states and 100655 transitions. [2023-04-01 12:34:54,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:34:54,245 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 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 223 [2023-04-01 12:34:54,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:34:54,405 INFO L225 Difference]: With dead ends: 74638 [2023-04-01 12:34:54,405 INFO L226 Difference]: Without dead ends: 50801 [2023-04-01 12:34:54,460 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 12:34:54,462 INFO L413 NwaCegarLoop]: 1221 mSDtfsCounter, 628 mSDsluCounter, 620 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 628 SdHoareTripleChecker+Valid, 1841 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:34:54,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [628 Valid, 1841 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:34:54,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50801 states. [2023-04-01 12:34:57,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50801 to 25560. [2023-04-01 12:34:57,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25560 states, 25556 states have (on average 1.3517373610893724) internal successors, (34545), 25556 states have internal predecessors, (34545), 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 12:34:57,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25560 states to 25560 states and 34548 transitions. [2023-04-01 12:34:57,372 INFO L78 Accepts]: Start accepts. Automaton has 25560 states and 34548 transitions. Word has length 223 [2023-04-01 12:34:57,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:34:57,372 INFO L495 AbstractCegarLoop]: Abstraction has 25560 states and 34548 transitions. [2023-04-01 12:34:57,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 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 12:34:57,373 INFO L276 IsEmpty]: Start isEmpty. Operand 25560 states and 34548 transitions. [2023-04-01 12:34:57,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2023-04-01 12:34:57,438 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:34:57,438 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:34:57,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-01 12:34:57,439 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:34:57,439 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:34:57,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1049708720, now seen corresponding path program 1 times [2023-04-01 12:34:57,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:34:57,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361249214] [2023-04-01 12:34:57,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:34:57,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:34:57,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:34:57,976 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 12:34:57,977 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:34:57,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361249214] [2023-04-01 12:34:57,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361249214] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:34:57,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:34:57,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 12:34:57,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856083951] [2023-04-01 12:34:57,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:34:57,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 12:34:57,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:34:57,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 12:34:57,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 12:34:57,979 INFO L87 Difference]: Start difference. First operand 25560 states and 34548 transitions. Second operand has 5 states, 5 states have (on average 44.2) internal successors, (221), 5 states have internal predecessors, (221), 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 12:35:03,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:35:03,064 INFO L93 Difference]: Finished difference Result 73963 states and 99619 transitions. [2023-04-01 12:35:03,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 12:35:03,065 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 44.2) internal successors, (221), 5 states have internal predecessors, (221), 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 224 [2023-04-01 12:35:03,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:35:03,183 INFO L225 Difference]: With dead ends: 73963 [2023-04-01 12:35:03,183 INFO L226 Difference]: Without dead ends: 48607 [2023-04-01 12:35:03,236 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 12:35:03,239 INFO L413 NwaCegarLoop]: 978 mSDtfsCounter, 1250 mSDsluCounter, 1191 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1250 SdHoareTripleChecker+Valid, 2169 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 12:35:03,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1250 Valid, 2169 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 12:35:03,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48607 states. [2023-04-01 12:35:07,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48607 to 48605. [2023-04-01 12:35:07,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48605 states, 48601 states have (on average 1.3389024917182775) internal successors, (65072), 48601 states have internal predecessors, (65072), 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 12:35:08,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48605 states to 48605 states and 65075 transitions. [2023-04-01 12:35:08,090 INFO L78 Accepts]: Start accepts. Automaton has 48605 states and 65075 transitions. Word has length 224 [2023-04-01 12:35:08,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:35:08,090 INFO L495 AbstractCegarLoop]: Abstraction has 48605 states and 65075 transitions. [2023-04-01 12:35:08,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 44.2) internal successors, (221), 5 states have internal predecessors, (221), 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 12:35:08,091 INFO L276 IsEmpty]: Start isEmpty. Operand 48605 states and 65075 transitions. [2023-04-01 12:35:08,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2023-04-01 12:35:08,138 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:35:08,138 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:35:08,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-01 12:35:08,138 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:35:08,139 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:35:08,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1524424125, now seen corresponding path program 1 times [2023-04-01 12:35:08,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:35:08,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991327962] [2023-04-01 12:35:08,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:35:08,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:35:08,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:35:08,619 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 12:35:08,619 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:35:08,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991327962] [2023-04-01 12:35:08,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991327962] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:35:08,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:35:08,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 12:35:08,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321434612] [2023-04-01 12:35:08,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:35:08,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 12:35:08,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:35:08,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 12:35:08,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 12:35:08,621 INFO L87 Difference]: Start difference. First operand 48605 states and 65075 transitions. Second operand has 4 states, 4 states have (on average 55.5) internal successors, (222), 4 states have internal predecessors, (222), 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 12:35:18,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:35:18,298 INFO L93 Difference]: Finished difference Result 141503 states and 188819 transitions. [2023-04-01 12:35:18,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 12:35:18,299 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 55.5) internal successors, (222), 4 states have internal predecessors, (222), 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 225 [2023-04-01 12:35:18,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:35:18,522 INFO L225 Difference]: With dead ends: 141503 [2023-04-01 12:35:18,522 INFO L226 Difference]: Without dead ends: 95166 [2023-04-01 12:35:18,736 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 12:35:18,737 INFO L413 NwaCegarLoop]: 977 mSDtfsCounter, 1411 mSDsluCounter, 601 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1411 SdHoareTripleChecker+Valid, 1578 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:35:18,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1411 Valid, 1578 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:35:18,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95166 states.