/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 06:27:19,009 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 06:27:19,011 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 06:27:19,049 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 06:27:19,050 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 06:27:19,052 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 06:27:19,056 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 06:27:19,058 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 06:27:19,059 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 06:27:19,064 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 06:27:19,065 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 06:27:19,067 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 06:27:19,067 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 06:27:19,070 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 06:27:19,072 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 06:27:19,073 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 06:27:19,074 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 06:27:19,074 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 06:27:19,077 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 06:27:19,082 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 06:27:19,083 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 06:27:19,084 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 06:27:19,085 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 06:27:19,087 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 06:27:19,094 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 06:27:19,101 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 06:27:19,102 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 06:27:19,102 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 06:27:19,104 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 06:27:19,134 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 06:27:19,134 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 06:27:19,135 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 06:27:19,135 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 06:27:19,136 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 06:27:19,136 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 06:27:19,136 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 06:27:19,136 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 06:27:19,136 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 06:27:19,136 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 06:27:19,137 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 06:27:19,137 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 06:27:19,137 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 06:27:19,138 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 06:27:19,138 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 06:27:19,138 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 06:27:19,138 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 06:27:19,138 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 06:27:19,139 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 06:27:19,139 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 06:27:19,139 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 06:27:19,139 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 06:27:19,139 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 06:27:19,140 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 06:27:19,140 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 06:27:19,140 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 06:27:19,140 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 06:27:19,141 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 06:27:19,141 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 06:27:19,141 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 06:27:19,141 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 06:27:19,141 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 06:27:19,141 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 06:27:19,142 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 06:27:19,142 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 06:27:19,142 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 06:27:19,142 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 06:27:19,142 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 06:27:19,142 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 06:27:19,142 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 06:27:19,143 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 06:27:19,143 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 06:27:19,405 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 06:27:19,432 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 06:27:19,434 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 06:27:19,435 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 06:27:19,436 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 06:27:19,437 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2023-04-01 06:27:20,599 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 06:27:20,831 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 06:27:20,832 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2023-04-01 06:27:20,848 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/941458a65/d43e81d25f304d26a452ff4d1c4c8566/FLAGb14360ec5 [2023-04-01 06:27:20,862 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/941458a65/d43e81d25f304d26a452ff4d1c4c8566 [2023-04-01 06:27:20,865 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 06:27:20,866 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 06:27:20,869 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 06:27:20,869 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 06:27:20,872 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 06:27:20,872 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:27:20" (1/1) ... [2023-04-01 06:27:20,873 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f32fd0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:27:20, skipping insertion in model container [2023-04-01 06:27:20,874 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:27:20" (1/1) ... [2023-04-01 06:27:20,879 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 06:27:20,929 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 06:27:21,202 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.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[14417,14430] [2023-04-01 06:27:21,294 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 06:27:21,309 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 06:27:21,383 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.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[14417,14430] [2023-04-01 06:27:21,428 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 06:27:21,443 INFO L208 MainTranslator]: Completed translation [2023-04-01 06:27:21,443 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:27:21 WrapperNode [2023-04-01 06:27:21,444 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 06:27:21,444 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 06:27:21,444 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 06:27:21,444 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 06:27:21,452 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:27:21" (1/1) ... [2023-04-01 06:27:21,452 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:27:21" (1/1) ... [2023-04-01 06:27:21,466 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:27:21" (1/1) ... [2023-04-01 06:27:21,466 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:27:21" (1/1) ... [2023-04-01 06:27:21,507 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:27:21" (1/1) ... [2023-04-01 06:27:21,521 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:27:21" (1/1) ... [2023-04-01 06:27:21,531 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:27:21" (1/1) ... [2023-04-01 06:27:21,541 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:27:21" (1/1) ... [2023-04-01 06:27:21,548 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 06:27:21,549 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 06:27:21,549 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 06:27:21,549 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 06:27:21,550 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:27:21" (1/1) ... [2023-04-01 06:27:21,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 06:27:21,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 06:27:21,588 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 06:27:21,597 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 06:27:21,632 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 06:27:21,632 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 06:27:21,632 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 06:27:21,633 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 06:27:21,633 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 06:27:21,633 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 06:27:21,633 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 06:27:21,633 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 06:27:21,633 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 06:27:21,633 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-01 06:27:21,633 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2023-04-01 06:27:21,633 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-01 06:27:21,634 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-01 06:27:21,634 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 06:27:21,634 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-01 06:27:21,634 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-01 06:27:21,634 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-01 06:27:21,634 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-01 06:27:21,634 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-01 06:27:21,634 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-01 06:27:21,634 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-01 06:27:21,635 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 06:27:21,635 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 06:27:21,636 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 06:27:21,636 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 06:27:21,636 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 06:27:21,636 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 06:27:21,636 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 06:27:21,793 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 06:27:21,795 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 06:27:22,770 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 06:27:23,108 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 06:27:23,108 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-01 06:27:23,112 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:27:23 BoogieIcfgContainer [2023-04-01 06:27:23,112 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 06:27:23,115 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 06:27:23,115 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 06:27:23,118 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 06:27:23,118 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 06:27:20" (1/3) ... [2023-04-01 06:27:23,119 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fa98fee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:27:23, skipping insertion in model container [2023-04-01 06:27:23,119 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:27:21" (2/3) ... [2023-04-01 06:27:23,119 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fa98fee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:27:23, skipping insertion in model container [2023-04-01 06:27:23,119 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:27:23" (3/3) ... [2023-04-01 06:27:23,120 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2023-04-01 06:27:23,137 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 06:27:23,138 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 06:27:23,199 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 06:27:23,205 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;@6f298844, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 06:27:23,206 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 06:27:23,212 INFO L276 IsEmpty]: Start isEmpty. Operand has 241 states, 227 states have (on average 1.7665198237885462) internal successors, (401), 236 states have internal predecessors, (401), 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 06:27:23,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-04-01 06:27:23,223 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:27:23,224 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] [2023-04-01 06:27:23,225 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:27:23,229 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:27:23,229 INFO L85 PathProgramCache]: Analyzing trace with hash -182646994, now seen corresponding path program 1 times [2023-04-01 06:27:23,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:27:23,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138141127] [2023-04-01 06:27:23,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:27:23,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:27:23,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:27:24,779 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 06:27:24,779 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:27:24,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138141127] [2023-04-01 06:27:24,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138141127] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:27:24,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:27:24,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 06:27:24,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131995366] [2023-04-01 06:27:24,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:27:24,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 06:27:24,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:27:24,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 06:27:24,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 06:27:24,847 INFO L87 Difference]: Start difference. First operand has 241 states, 227 states have (on average 1.7665198237885462) internal successors, (401), 236 states have internal predecessors, (401), 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 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 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 06:27:25,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:27:25,193 INFO L93 Difference]: Finished difference Result 596 states and 991 transitions. [2023-04-01 06:27:25,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 06:27:25,196 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 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 119 [2023-04-01 06:27:25,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:27:25,214 INFO L225 Difference]: With dead ends: 596 [2023-04-01 06:27:25,215 INFO L226 Difference]: Without dead ends: 393 [2023-04-01 06:27:25,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-04-01 06:27:25,223 INFO L413 NwaCegarLoop]: 615 mSDtfsCounter, 1044 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1044 SdHoareTripleChecker+Valid, 1009 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:27:25,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1044 Valid, 1009 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:27:25,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2023-04-01 06:27:25,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 391. [2023-04-01 06:27:25,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 387 states have (on average 1.310077519379845) internal successors, (507), 387 states have internal predecessors, (507), 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 06:27:25,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 510 transitions. [2023-04-01 06:27:25,347 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 510 transitions. Word has length 119 [2023-04-01 06:27:25,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:27:25,348 INFO L495 AbstractCegarLoop]: Abstraction has 391 states and 510 transitions. [2023-04-01 06:27:25,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 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 06:27:25,348 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 510 transitions. [2023-04-01 06:27:25,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-04-01 06:27:25,357 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:27:25,357 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:27:25,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 06:27:25,358 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:27:25,358 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:27:25,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1820536293, now seen corresponding path program 1 times [2023-04-01 06:27:25,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:27:25,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28108127] [2023-04-01 06:27:25,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:27:25,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:27:25,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:27:25,899 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 06:27:25,899 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:27:25,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28108127] [2023-04-01 06:27:25,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28108127] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:27:25,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:27:25,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-01 06:27:25,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029330920] [2023-04-01 06:27:25,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:27:25,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 06:27:25,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:27:25,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 06:27:25,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 06:27:25,903 INFO L87 Difference]: Start difference. First operand 391 states and 510 transitions. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 7 states have internal predecessors, (122), 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 06:27:26,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:27:26,524 INFO L93 Difference]: Finished difference Result 1337 states and 1750 transitions. [2023-04-01 06:27:26,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 06:27:26,526 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 7 states have internal predecessors, (122), 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) Word has length 125 [2023-04-01 06:27:26,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:27:26,533 INFO L225 Difference]: With dead ends: 1337 [2023-04-01 06:27:26,538 INFO L226 Difference]: Without dead ends: 1000 [2023-04-01 06:27:26,546 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2023-04-01 06:27:26,548 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 1957 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1957 SdHoareTripleChecker+Valid, 700 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 06:27:26,549 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1957 Valid, 700 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 06:27:26,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1000 states. [2023-04-01 06:27:26,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1000 to 996. [2023-04-01 06:27:26,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 996 states, 992 states have (on average 1.2691532258064515) internal successors, (1259), 992 states have internal predecessors, (1259), 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 06:27:26,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 996 states to 996 states and 1262 transitions. [2023-04-01 06:27:26,739 INFO L78 Accepts]: Start accepts. Automaton has 996 states and 1262 transitions. Word has length 125 [2023-04-01 06:27:26,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:27:26,741 INFO L495 AbstractCegarLoop]: Abstraction has 996 states and 1262 transitions. [2023-04-01 06:27:26,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 7 states have internal predecessors, (122), 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 06:27:26,741 INFO L276 IsEmpty]: Start isEmpty. Operand 996 states and 1262 transitions. [2023-04-01 06:27:26,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-04-01 06:27:26,744 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:27:26,744 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:27:26,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 06:27:26,745 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:27:26,745 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:27:26,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1010973846, now seen corresponding path program 1 times [2023-04-01 06:27:26,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:27:26,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087064039] [2023-04-01 06:27:26,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:27:26,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:27:26,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:27:27,536 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 06:27:27,536 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:27:27,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087064039] [2023-04-01 06:27:27,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087064039] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:27:27,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:27:27,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 06:27:27,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011051247] [2023-04-01 06:27:27,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:27:27,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 06:27:27,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:27:27,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 06:27:27,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-04-01 06:27:27,539 INFO L87 Difference]: Start difference. First operand 996 states and 1262 transitions. Second operand has 5 states, 5 states have (on average 24.4) internal successors, (122), 5 states have internal predecessors, (122), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:27:27,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:27:27,789 INFO L93 Difference]: Finished difference Result 1552 states and 2002 transitions. [2023-04-01 06:27:27,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 06:27:27,789 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.4) internal successors, (122), 5 states have internal predecessors, (122), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 125 [2023-04-01 06:27:27,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:27:27,796 INFO L225 Difference]: With dead ends: 1552 [2023-04-01 06:27:27,796 INFO L226 Difference]: Without dead ends: 1014 [2023-04-01 06:27:27,799 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-04-01 06:27:27,803 INFO L413 NwaCegarLoop]: 396 mSDtfsCounter, 553 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 553 SdHoareTripleChecker+Valid, 645 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:27:27,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [553 Valid, 645 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:27:27,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1014 states. [2023-04-01 06:27:27,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1014 to 1012. [2023-04-01 06:27:27,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1012 states, 1008 states have (on average 1.2708333333333333) internal successors, (1281), 1008 states have internal predecessors, (1281), 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 06:27:27,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1012 states to 1012 states and 1284 transitions. [2023-04-01 06:27:27,965 INFO L78 Accepts]: Start accepts. Automaton has 1012 states and 1284 transitions. Word has length 125 [2023-04-01 06:27:27,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:27:27,965 INFO L495 AbstractCegarLoop]: Abstraction has 1012 states and 1284 transitions. [2023-04-01 06:27:27,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.4) internal successors, (122), 5 states have internal predecessors, (122), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:27:27,966 INFO L276 IsEmpty]: Start isEmpty. Operand 1012 states and 1284 transitions. [2023-04-01 06:27:27,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-04-01 06:27:27,967 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:27:27,968 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:27:27,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 06:27:27,968 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:27:27,968 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:27:27,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1173922222, now seen corresponding path program 1 times [2023-04-01 06:27:27,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:27:27,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807190586] [2023-04-01 06:27:27,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:27:27,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:27:28,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:27:28,756 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 06:27:28,756 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:27:28,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807190586] [2023-04-01 06:27:28,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807190586] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:27:28,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:27:28,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 06:27:28,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710514683] [2023-04-01 06:27:28,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:27:28,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 06:27:28,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:27:28,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 06:27:28,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 06:27:28,758 INFO L87 Difference]: Start difference. First operand 1012 states and 1284 transitions. Second operand has 5 states, 5 states have (on average 25.6) internal successors, (128), 5 states have internal predecessors, (128), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:27:29,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:27:29,026 INFO L93 Difference]: Finished difference Result 1566 states and 2027 transitions. [2023-04-01 06:27:29,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 06:27:29,029 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.6) internal successors, (128), 5 states have internal predecessors, (128), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 131 [2023-04-01 06:27:29,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:27:29,033 INFO L225 Difference]: With dead ends: 1566 [2023-04-01 06:27:29,033 INFO L226 Difference]: Without dead ends: 947 [2023-04-01 06:27:29,034 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-04-01 06:27:29,039 INFO L413 NwaCegarLoop]: 440 mSDtfsCounter, 723 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 723 SdHoareTripleChecker+Valid, 689 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:27:29,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [723 Valid, 689 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:27:29,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947 states. [2023-04-01 06:27:29,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947 to 872. [2023-04-01 06:27:29,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 872 states, 868 states have (on average 1.2684331797235022) internal successors, (1101), 868 states have internal predecessors, (1101), 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 06:27:29,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 1104 transitions. [2023-04-01 06:27:29,174 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 1104 transitions. Word has length 131 [2023-04-01 06:27:29,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:27:29,174 INFO L495 AbstractCegarLoop]: Abstraction has 872 states and 1104 transitions. [2023-04-01 06:27:29,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.6) internal successors, (128), 5 states have internal predecessors, (128), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:27:29,175 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 1104 transitions. [2023-04-01 06:27:29,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-04-01 06:27:29,176 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:27:29,176 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:27:29,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 06:27:29,177 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:27:29,177 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:27:29,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1410607808, now seen corresponding path program 1 times [2023-04-01 06:27:29,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:27:29,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223854898] [2023-04-01 06:27:29,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:27:29,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:27:29,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:27:29,375 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 06:27:29,375 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:27:29,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223854898] [2023-04-01 06:27:29,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223854898] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:27:29,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:27:29,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 06:27:29,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028366696] [2023-04-01 06:27:29,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:27:29,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 06:27:29,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:27:29,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 06:27:29,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 06:27:29,381 INFO L87 Difference]: Start difference. First operand 872 states and 1104 transitions. Second operand has 5 states, 5 states have (on average 25.6) internal successors, (128), 4 states have internal predecessors, (128), 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 06:27:29,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:27:29,621 INFO L93 Difference]: Finished difference Result 1632 states and 2065 transitions. [2023-04-01 06:27:29,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 06:27:29,622 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.6) internal successors, (128), 4 states have internal predecessors, (128), 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) Word has length 131 [2023-04-01 06:27:29,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:27:29,626 INFO L225 Difference]: With dead ends: 1632 [2023-04-01 06:27:29,626 INFO L226 Difference]: Without dead ends: 872 [2023-04-01 06:27:29,628 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-01 06:27:29,629 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 771 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 771 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:27:29,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [771 Valid, 228 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:27:29,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 872 states. [2023-04-01 06:27:29,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 872 to 872. [2023-04-01 06:27:29,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 872 states, 868 states have (on average 1.2453917050691243) internal successors, (1081), 868 states have internal predecessors, (1081), 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 06:27:29,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 1084 transitions. [2023-04-01 06:27:29,799 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 1084 transitions. Word has length 131 [2023-04-01 06:27:29,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:27:29,800 INFO L495 AbstractCegarLoop]: Abstraction has 872 states and 1084 transitions. [2023-04-01 06:27:29,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.6) internal successors, (128), 4 states have internal predecessors, (128), 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 06:27:29,801 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 1084 transitions. [2023-04-01 06:27:29,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-04-01 06:27:29,802 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:27:29,802 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:27:29,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 06:27:29,803 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:27:29,803 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:27:29,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1702684630, now seen corresponding path program 1 times [2023-04-01 06:27:29,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:27:29,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708804259] [2023-04-01 06:27:29,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:27:29,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:27:29,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:27:30,682 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 06:27:30,683 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:27:30,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708804259] [2023-04-01 06:27:30,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708804259] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:27:30,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:27:30,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 06:27:30,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482022025] [2023-04-01 06:27:30,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:27:30,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 06:27:30,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:27:30,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 06:27:30,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-04-01 06:27:30,685 INFO L87 Difference]: Start difference. First operand 872 states and 1084 transitions. Second operand has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:27:31,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:27:31,180 INFO L93 Difference]: Finished difference Result 2612 states and 3257 transitions. [2023-04-01 06:27:31,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 06:27:31,181 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 131 [2023-04-01 06:27:31,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:27:31,188 INFO L225 Difference]: With dead ends: 2612 [2023-04-01 06:27:31,189 INFO L226 Difference]: Without dead ends: 1918 [2023-04-01 06:27:31,191 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-04-01 06:27:31,192 INFO L413 NwaCegarLoop]: 603 mSDtfsCounter, 970 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 970 SdHoareTripleChecker+Valid, 1008 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:27:31,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [970 Valid, 1008 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:27:31,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1918 states. [2023-04-01 06:27:31,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1918 to 1914. [2023-04-01 06:27:31,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1914 states, 1910 states have (on average 1.2350785340314137) internal successors, (2359), 1910 states have internal predecessors, (2359), 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 06:27:31,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1914 states to 1914 states and 2362 transitions. [2023-04-01 06:27:31,631 INFO L78 Accepts]: Start accepts. Automaton has 1914 states and 2362 transitions. Word has length 131 [2023-04-01 06:27:31,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:27:31,631 INFO L495 AbstractCegarLoop]: Abstraction has 1914 states and 2362 transitions. [2023-04-01 06:27:31,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:27:31,632 INFO L276 IsEmpty]: Start isEmpty. Operand 1914 states and 2362 transitions. [2023-04-01 06:27:31,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-04-01 06:27:31,635 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:27:31,635 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:27:31,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 06:27:31,635 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:27:31,635 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:27:31,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1743137046, now seen corresponding path program 1 times [2023-04-01 06:27:31,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:27:31,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776629779] [2023-04-01 06:27:31,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:27:31,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:27:31,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:27:32,315 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 06:27:32,315 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:27:32,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776629779] [2023-04-01 06:27:32,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776629779] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:27:32,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:27:32,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 06:27:32,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976434674] [2023-04-01 06:27:32,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:27:32,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 06:27:32,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:27:32,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 06:27:32,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-04-01 06:27:32,317 INFO L87 Difference]: Start difference. First operand 1914 states and 2362 transitions. Second operand has 5 states, 5 states have (on average 25.6) internal successors, (128), 5 states have internal predecessors, (128), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:27:32,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:27:32,639 INFO L93 Difference]: Finished difference Result 2308 states and 2866 transitions. [2023-04-01 06:27:32,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 06:27:32,639 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.6) internal successors, (128), 5 states have internal predecessors, (128), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 131 [2023-04-01 06:27:32,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:27:32,646 INFO L225 Difference]: With dead ends: 2308 [2023-04-01 06:27:32,646 INFO L226 Difference]: Without dead ends: 1638 [2023-04-01 06:27:32,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-04-01 06:27:32,649 INFO L413 NwaCegarLoop]: 439 mSDtfsCounter, 677 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 677 SdHoareTripleChecker+Valid, 695 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:27:32,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [677 Valid, 695 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:27:32,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1638 states. [2023-04-01 06:27:32,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1638 to 1636. [2023-04-01 06:27:32,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1636 states, 1632 states have (on average 1.2383578431372548) internal successors, (2021), 1632 states have internal predecessors, (2021), 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 06:27:32,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1636 states to 1636 states and 2024 transitions. [2023-04-01 06:27:32,938 INFO L78 Accepts]: Start accepts. Automaton has 1636 states and 2024 transitions. Word has length 131 [2023-04-01 06:27:32,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:27:32,938 INFO L495 AbstractCegarLoop]: Abstraction has 1636 states and 2024 transitions. [2023-04-01 06:27:32,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.6) internal successors, (128), 5 states have internal predecessors, (128), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:27:32,939 INFO L276 IsEmpty]: Start isEmpty. Operand 1636 states and 2024 transitions. [2023-04-01 06:27:32,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-04-01 06:27:32,941 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:27:32,941 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] [2023-04-01 06:27:32,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 06:27:32,942 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:27:32,942 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:27:32,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1865022708, now seen corresponding path program 1 times [2023-04-01 06:27:32,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:27:32,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335398702] [2023-04-01 06:27:32,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:27:32,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:27:32,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:27:33,030 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 06:27:33,030 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:27:33,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335398702] [2023-04-01 06:27:33,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335398702] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:27:33,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:27:33,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:27:33,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149566033] [2023-04-01 06:27:33,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:27:33,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:27:33,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:27:33,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:27:33,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:27:33,033 INFO L87 Difference]: Start difference. First operand 1636 states and 2024 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 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 06:27:33,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:27:33,628 INFO L93 Difference]: Finished difference Result 4150 states and 5196 transitions. [2023-04-01 06:27:33,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:27:33,629 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 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 137 [2023-04-01 06:27:33,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:27:33,638 INFO L225 Difference]: With dead ends: 4150 [2023-04-01 06:27:33,638 INFO L226 Difference]: Without dead ends: 2784 [2023-04-01 06:27:33,642 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 06:27:33,643 INFO L413 NwaCegarLoop]: 364 mSDtfsCounter, 189 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:27:33,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 567 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:27:33,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2784 states. [2023-04-01 06:27:34,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2784 to 2128. [2023-04-01 06:27:34,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2128 states, 2124 states have (on average 1.2740112994350283) internal successors, (2706), 2124 states have internal predecessors, (2706), 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 06:27:34,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2128 states to 2128 states and 2709 transitions. [2023-04-01 06:27:34,017 INFO L78 Accepts]: Start accepts. Automaton has 2128 states and 2709 transitions. Word has length 137 [2023-04-01 06:27:34,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:27:34,017 INFO L495 AbstractCegarLoop]: Abstraction has 2128 states and 2709 transitions. [2023-04-01 06:27:34,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 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 06:27:34,017 INFO L276 IsEmpty]: Start isEmpty. Operand 2128 states and 2709 transitions. [2023-04-01 06:27:34,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-04-01 06:27:34,020 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:27:34,020 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] [2023-04-01 06:27:34,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-01 06:27:34,021 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:27:34,021 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:27:34,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1597135220, now seen corresponding path program 1 times [2023-04-01 06:27:34,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:27:34,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646175590] [2023-04-01 06:27:34,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:27:34,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:27:34,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:27:34,774 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 06:27:34,775 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:27:34,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646175590] [2023-04-01 06:27:34,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646175590] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:27:34,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:27:34,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 06:27:34,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896925489] [2023-04-01 06:27:34,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:27:34,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 06:27:34,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:27:34,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 06:27:34,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 06:27:34,777 INFO L87 Difference]: Start difference. First operand 2128 states and 2709 transitions. Second operand has 5 states, 5 states have (on average 26.8) internal successors, (134), 5 states have internal predecessors, (134), 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 06:27:35,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:27:35,445 INFO L93 Difference]: Finished difference Result 3702 states and 4806 transitions. [2023-04-01 06:27:35,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 06:27:35,446 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.8) internal successors, (134), 5 states have internal predecessors, (134), 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 137 [2023-04-01 06:27:35,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:27:35,455 INFO L225 Difference]: With dead ends: 3702 [2023-04-01 06:27:35,456 INFO L226 Difference]: Without dead ends: 2628 [2023-04-01 06:27:35,458 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-04-01 06:27:35,460 INFO L413 NwaCegarLoop]: 277 mSDtfsCounter, 899 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 899 SdHoareTripleChecker+Valid, 537 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:27:35,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [899 Valid, 537 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:27:35,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2628 states. [2023-04-01 06:27:35,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2628 to 2118. [2023-04-01 06:27:35,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2118 states, 2114 states have (on average 1.2743614001892147) internal successors, (2694), 2114 states have internal predecessors, (2694), 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 06:27:35,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2118 states to 2118 states and 2697 transitions. [2023-04-01 06:27:35,958 INFO L78 Accepts]: Start accepts. Automaton has 2118 states and 2697 transitions. Word has length 137 [2023-04-01 06:27:35,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:27:35,958 INFO L495 AbstractCegarLoop]: Abstraction has 2118 states and 2697 transitions. [2023-04-01 06:27:35,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.8) internal successors, (134), 5 states have internal predecessors, (134), 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 06:27:35,958 INFO L276 IsEmpty]: Start isEmpty. Operand 2118 states and 2697 transitions. [2023-04-01 06:27:35,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-04-01 06:27:35,961 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:27:35,961 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] [2023-04-01 06:27:35,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-01 06:27:35,961 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:27:35,962 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:27:35,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1439813230, now seen corresponding path program 1 times [2023-04-01 06:27:35,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:27:35,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627025095] [2023-04-01 06:27:35,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:27:35,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:27:36,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:27:55,683 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 06:27:55,683 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:27:55,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627025095] [2023-04-01 06:27:55,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627025095] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:27:55,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:27:55,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2023-04-01 06:27:55,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473811287] [2023-04-01 06:27:55,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:27:55,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-04-01 06:27:55,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:27:55,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-04-01 06:27:55,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1656, Unknown=0, NotChecked=0, Total=1892 [2023-04-01 06:27:55,687 INFO L87 Difference]: Start difference. First operand 2118 states and 2697 transitions. Second operand has 44 states, 44 states have (on average 3.0454545454545454) internal successors, (134), 44 states have internal predecessors, (134), 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)