/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_lcr-var-start-time.5.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 06:35:32,542 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 06:35:32,543 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 06:35:32,568 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 06:35:32,568 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 06:35:32,571 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 06:35:32,574 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 06:35:32,577 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 06:35:32,578 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 06:35:32,582 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 06:35:32,584 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 06:35:32,585 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 06:35:32,586 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 06:35:32,589 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 06:35:32,590 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 06:35:32,591 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 06:35:32,592 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 06:35:32,592 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 06:35:32,594 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 06:35:32,599 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 06:35:32,600 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 06:35:32,601 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 06:35:32,602 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 06:35:32,603 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 06:35:32,611 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 06:35:32,617 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 06:35:32,618 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 06:35:32,619 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 06:35:32,620 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 06:35:32,654 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 06:35:32,654 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 06:35:32,654 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 06:35:32,655 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 06:35:32,655 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 06:35:32,656 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 06:35:32,656 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 06:35:32,656 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 06:35:32,656 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 06:35:32,656 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 06:35:32,657 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 06:35:32,657 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 06:35:32,657 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 06:35:32,657 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 06:35:32,657 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 06:35:32,657 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 06:35:32,657 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 06:35:32,658 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 06:35:32,658 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 06:35:32,658 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 06:35:32,658 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 06:35:32,658 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 06:35:32,658 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 06:35:32,659 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 06:35:32,659 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 06:35:32,659 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 06:35:32,659 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 06:35:32,659 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 06:35:32,659 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 06:35:32,660 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 06:35:32,660 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 06:35:32,660 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 06:35:32,660 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 06:35:32,660 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 06:35:32,660 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 06:35:32,660 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 06:35:32,661 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 06:35:32,661 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 06:35:32,661 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 06:35:32,661 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 06:35:32,661 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 06:35:32,661 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 06:35:32,871 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 06:35:32,895 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 06:35:32,897 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 06:35:32,899 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 06:35:32,899 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 06:35:32,900 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2023-04-01 06:35:33,977 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 06:35:34,232 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 06:35:34,233 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2023-04-01 06:35:34,243 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/88a4d09e7/e13492884bee4b598057e8f9968b8cc3/FLAGdccb0ea7a [2023-04-01 06:35:34,255 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/88a4d09e7/e13492884bee4b598057e8f9968b8cc3 [2023-04-01 06:35:34,258 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 06:35:34,259 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 06:35:34,260 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 06:35:34,260 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 06:35:34,264 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 06:35:34,265 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:35:34" (1/1) ... [2023-04-01 06:35:34,266 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c847af9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:35:34, skipping insertion in model container [2023-04-01 06:35:34,266 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:35:34" (1/1) ... [2023-04-01 06:35:34,271 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 06:35:34,316 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 06:35:34,501 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_lcr-var-start-time.5.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[8458,8471] [2023-04-01 06:35:34,568 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 06:35:34,587 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 06:35:34,629 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_lcr-var-start-time.5.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[8458,8471] [2023-04-01 06:35:34,686 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 06:35:34,712 INFO L208 MainTranslator]: Completed translation [2023-04-01 06:35:34,713 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:35:34 WrapperNode [2023-04-01 06:35:34,713 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 06:35:34,714 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 06:35:34,714 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 06:35:34,714 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 06:35:34,723 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:35:34" (1/1) ... [2023-04-01 06:35:34,723 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:35:34" (1/1) ... [2023-04-01 06:35:34,740 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:35:34" (1/1) ... [2023-04-01 06:35:34,740 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:35:34" (1/1) ... [2023-04-01 06:35:34,756 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:35:34" (1/1) ... [2023-04-01 06:35:34,766 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:35:34" (1/1) ... [2023-04-01 06:35:34,771 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:35:34" (1/1) ... [2023-04-01 06:35:34,774 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:35:34" (1/1) ... [2023-04-01 06:35:34,780 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 06:35:34,782 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 06:35:34,782 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 06:35:34,783 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 06:35:34,783 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:35:34" (1/1) ... [2023-04-01 06:35:34,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 06:35:34,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 06:35:34,824 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 06:35:34,826 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 06:35:34,855 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 06:35:34,856 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 06:35:34,856 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 06:35:34,856 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 06:35:34,856 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 06:35:34,856 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 06:35:34,856 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 06:35:34,856 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 06:35:34,856 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 06:35:34,857 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-01 06:35:34,857 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-01 06:35:34,857 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2023-04-01 06:35:34,857 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-01 06:35:34,857 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 06:35:34,858 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-01 06:35:34,859 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-01 06:35:34,859 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-01 06:35:34,859 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-01 06:35:34,859 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-01 06:35:34,859 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-01 06:35:34,859 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2023-04-01 06:35:34,859 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-01 06:35:34,859 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-01 06:35:34,859 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 06:35:34,859 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 06:35:34,860 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 06:35:34,860 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 06:35:34,860 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 06:35:34,860 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 06:35:34,860 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 06:35:35,017 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 06:35:35,037 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 06:35:35,684 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 06:35:35,887 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 06:35:35,887 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-01 06:35:35,890 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:35:35 BoogieIcfgContainer [2023-04-01 06:35:35,890 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 06:35:35,893 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 06:35:35,893 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 06:35:35,896 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 06:35:35,896 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 06:35:34" (1/3) ... [2023-04-01 06:35:35,897 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13c75f03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:35:35, skipping insertion in model container [2023-04-01 06:35:35,897 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:35:34" (2/3) ... [2023-04-01 06:35:35,897 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13c75f03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:35:35, skipping insertion in model container [2023-04-01 06:35:35,897 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:35:35" (3/3) ... [2023-04-01 06:35:35,899 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.5.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2023-04-01 06:35:35,916 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 06:35:35,917 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 06:35:35,967 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 06:35:35,973 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;@72d61d2f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 06:35:35,973 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 06:35:35,978 INFO L276 IsEmpty]: Start isEmpty. Operand has 168 states, 162 states have (on average 1.6975308641975309) internal successors, (275), 163 states have internal predecessors, (275), 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 06:35:35,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-04-01 06:35:35,986 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:35:35,987 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] [2023-04-01 06:35:35,988 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:35:35,992 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:35:35,992 INFO L85 PathProgramCache]: Analyzing trace with hash -260744172, now seen corresponding path program 1 times [2023-04-01 06:35:35,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:35:35,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370036387] [2023-04-01 06:35:35,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:35:36,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:35:36,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:35:36,779 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 06:35:36,780 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:35:36,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370036387] [2023-04-01 06:35:36,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370036387] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:35:36,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:35:36,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 06:35:36,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846108200] [2023-04-01 06:35:36,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:35:36,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 06:35:36,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:35:36,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 06:35:36,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-04-01 06:35:36,842 INFO L87 Difference]: Start difference. First operand has 168 states, 162 states have (on average 1.6975308641975309) internal successors, (275), 163 states have internal predecessors, (275), 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 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 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 06:35:37,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:35:37,322 INFO L93 Difference]: Finished difference Result 582 states and 922 transitions. [2023-04-01 06:35:37,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 06:35:37,325 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 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 71 [2023-04-01 06:35:37,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:35:37,343 INFO L225 Difference]: With dead ends: 582 [2023-04-01 06:35:37,344 INFO L226 Difference]: Without dead ends: 473 [2023-04-01 06:35:37,348 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-04-01 06:35:37,353 INFO L413 NwaCegarLoop]: 374 mSDtfsCounter, 944 mSDsluCounter, 881 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 944 SdHoareTripleChecker+Valid, 1255 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 06:35:37,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [944 Valid, 1255 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 06:35:37,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2023-04-01 06:35:37,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 465. [2023-04-01 06:35:37,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 461 states have (on average 1.4143167028199566) internal successors, (652), 461 states have internal predecessors, (652), 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 06:35:37,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 655 transitions. [2023-04-01 06:35:37,495 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 655 transitions. Word has length 71 [2023-04-01 06:35:37,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:35:37,496 INFO L495 AbstractCegarLoop]: Abstraction has 465 states and 655 transitions. [2023-04-01 06:35:37,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 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 06:35:37,497 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 655 transitions. [2023-04-01 06:35:37,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-04-01 06:35:37,503 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:35:37,503 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] [2023-04-01 06:35:37,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 06:35:37,503 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:35:37,504 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:35:37,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1996754420, now seen corresponding path program 1 times [2023-04-01 06:35:37,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:35:37,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107633290] [2023-04-01 06:35:37,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:35:37,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:35:37,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:35:37,749 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 06:35:37,749 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:35:37,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107633290] [2023-04-01 06:35:37,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107633290] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:35:37,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:35:37,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 06:35:37,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198939015] [2023-04-01 06:35:37,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:35:37,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 06:35:37,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:35:37,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 06:35:37,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 06:35:37,758 INFO L87 Difference]: Start difference. First operand 465 states and 655 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 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 06:35:38,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:35:38,132 INFO L93 Difference]: Finished difference Result 1136 states and 1648 transitions. [2023-04-01 06:35:38,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 06:35:38,134 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 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 72 [2023-04-01 06:35:38,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:35:38,143 INFO L225 Difference]: With dead ends: 1136 [2023-04-01 06:35:38,143 INFO L226 Difference]: Without dead ends: 732 [2023-04-01 06:35:38,146 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 06:35:38,148 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 578 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 578 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 06:35:38,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [578 Valid, 233 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 06:35:38,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2023-04-01 06:35:38,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 730. [2023-04-01 06:35:38,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 730 states, 726 states have (on average 1.4462809917355373) internal successors, (1050), 726 states have internal predecessors, (1050), 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 06:35:38,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 730 states to 730 states and 1053 transitions. [2023-04-01 06:35:38,265 INFO L78 Accepts]: Start accepts. Automaton has 730 states and 1053 transitions. Word has length 72 [2023-04-01 06:35:38,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:35:38,266 INFO L495 AbstractCegarLoop]: Abstraction has 730 states and 1053 transitions. [2023-04-01 06:35:38,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 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 06:35:38,266 INFO L276 IsEmpty]: Start isEmpty. Operand 730 states and 1053 transitions. [2023-04-01 06:35:38,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-04-01 06:35:38,271 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:35:38,271 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] [2023-04-01 06:35:38,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 06:35:38,272 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:35:38,273 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:35:38,273 INFO L85 PathProgramCache]: Analyzing trace with hash 960627809, now seen corresponding path program 1 times [2023-04-01 06:35:38,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:35:38,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242148113] [2023-04-01 06:35:38,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:35:38,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:35:38,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:35:38,521 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 06:35:38,521 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:35:38,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242148113] [2023-04-01 06:35:38,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242148113] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:35:38,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:35:38,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 06:35:38,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016525135] [2023-04-01 06:35:38,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:35:38,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 06:35:38,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:35:38,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 06:35:38,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 06:35:38,524 INFO L87 Difference]: Start difference. First operand 730 states and 1053 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 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 06:35:38,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:35:38,958 INFO L93 Difference]: Finished difference Result 1844 states and 2725 transitions. [2023-04-01 06:35:38,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 06:35:38,959 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 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 72 [2023-04-01 06:35:38,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:35:38,964 INFO L225 Difference]: With dead ends: 1844 [2023-04-01 06:35:38,965 INFO L226 Difference]: Without dead ends: 1262 [2023-04-01 06:35:38,966 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 06:35:38,967 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 574 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 574 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 06:35:38,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [574 Valid, 250 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 06:35:38,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1262 states. [2023-04-01 06:35:39,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1262 to 1260. [2023-04-01 06:35:39,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1260 states, 1256 states have (on average 1.4689490445859872) internal successors, (1845), 1256 states have internal predecessors, (1845), 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 06:35:39,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1260 states to 1260 states and 1848 transitions. [2023-04-01 06:35:39,203 INFO L78 Accepts]: Start accepts. Automaton has 1260 states and 1848 transitions. Word has length 72 [2023-04-01 06:35:39,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:35:39,203 INFO L495 AbstractCegarLoop]: Abstraction has 1260 states and 1848 transitions. [2023-04-01 06:35:39,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 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 06:35:39,203 INFO L276 IsEmpty]: Start isEmpty. Operand 1260 states and 1848 transitions. [2023-04-01 06:35:39,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-04-01 06:35:39,205 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:35:39,205 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] [2023-04-01 06:35:39,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 06:35:39,205 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:35:39,206 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:35:39,206 INFO L85 PathProgramCache]: Analyzing trace with hash 993571730, now seen corresponding path program 1 times [2023-04-01 06:35:39,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:35:39,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083735901] [2023-04-01 06:35:39,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:35:39,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:35:39,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:35:39,335 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 06:35:39,335 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:35:39,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083735901] [2023-04-01 06:35:39,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083735901] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:35:39,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:35:39,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 06:35:39,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26287430] [2023-04-01 06:35:39,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:35:39,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 06:35:39,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:35:39,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 06:35:39,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 06:35:39,339 INFO L87 Difference]: Start difference. First operand 1260 states and 1848 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 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 06:35:39,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:35:39,879 INFO L93 Difference]: Finished difference Result 3468 states and 5162 transitions. [2023-04-01 06:35:39,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 06:35:39,879 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 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 72 [2023-04-01 06:35:39,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:35:39,889 INFO L225 Difference]: With dead ends: 3468 [2023-04-01 06:35:39,889 INFO L226 Difference]: Without dead ends: 2322 [2023-04-01 06:35:39,892 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 06:35:39,901 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 544 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 544 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 06:35:39,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [544 Valid, 249 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 06:35:39,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2322 states. [2023-04-01 06:35:40,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2322 to 2320. [2023-04-01 06:35:40,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2320 states, 2316 states have (on average 1.4792746113989637) internal successors, (3426), 2316 states have internal predecessors, (3426), 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 06:35:40,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2320 states to 2320 states and 3429 transitions. [2023-04-01 06:35:40,283 INFO L78 Accepts]: Start accepts. Automaton has 2320 states and 3429 transitions. Word has length 72 [2023-04-01 06:35:40,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:35:40,284 INFO L495 AbstractCegarLoop]: Abstraction has 2320 states and 3429 transitions. [2023-04-01 06:35:40,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 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 06:35:40,285 INFO L276 IsEmpty]: Start isEmpty. Operand 2320 states and 3429 transitions. [2023-04-01 06:35:40,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-04-01 06:35:40,286 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:35:40,286 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] [2023-04-01 06:35:40,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 06:35:40,286 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:35:40,287 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:35:40,287 INFO L85 PathProgramCache]: Analyzing trace with hash -552503613, now seen corresponding path program 1 times [2023-04-01 06:35:40,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:35:40,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034552517] [2023-04-01 06:35:40,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:35:40,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:35:40,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:35:40,428 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 06:35:40,429 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:35:40,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034552517] [2023-04-01 06:35:40,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034552517] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:35:40,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:35:40,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 06:35:40,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388504891] [2023-04-01 06:35:40,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:35:40,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 06:35:40,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:35:40,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 06:35:40,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 06:35:40,435 INFO L87 Difference]: Start difference. First operand 2320 states and 3429 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 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 06:35:41,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:35:41,237 INFO L93 Difference]: Finished difference Result 6678 states and 9953 transitions. [2023-04-01 06:35:41,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 06:35:41,241 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 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 72 [2023-04-01 06:35:41,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:35:41,263 INFO L225 Difference]: With dead ends: 6678 [2023-04-01 06:35:41,263 INFO L226 Difference]: Without dead ends: 4442 [2023-04-01 06:35:41,269 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 06:35:41,272 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 549 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 549 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 06:35:41,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [549 Valid, 241 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 06:35:41,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4442 states. [2023-04-01 06:35:41,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4442 to 4440. [2023-04-01 06:35:41,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4440 states, 4436 states have (on average 1.4792605951307485) internal successors, (6562), 4436 states have internal predecessors, (6562), 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 06:35:41,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4440 states to 4440 states and 6565 transitions. [2023-04-01 06:35:41,804 INFO L78 Accepts]: Start accepts. Automaton has 4440 states and 6565 transitions. Word has length 72 [2023-04-01 06:35:41,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:35:41,805 INFO L495 AbstractCegarLoop]: Abstraction has 4440 states and 6565 transitions. [2023-04-01 06:35:41,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 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 06:35:41,805 INFO L276 IsEmpty]: Start isEmpty. Operand 4440 states and 6565 transitions. [2023-04-01 06:35:41,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-04-01 06:35:41,806 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:35:41,806 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] [2023-04-01 06:35:41,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 06:35:41,806 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:35:41,807 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:35:41,807 INFO L85 PathProgramCache]: Analyzing trace with hash -326616795, now seen corresponding path program 1 times [2023-04-01 06:35:41,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:35:41,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742558174] [2023-04-01 06:35:41,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:35:41,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:35:41,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:35:41,923 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 06:35:41,923 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:35:41,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742558174] [2023-04-01 06:35:41,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742558174] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:35:41,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:35:41,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 06:35:41,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811166475] [2023-04-01 06:35:41,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:35:41,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 06:35:41,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:35:41,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 06:35:41,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 06:35:41,925 INFO L87 Difference]: Start difference. First operand 4440 states and 6565 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 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 06:35:43,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:35:43,224 INFO L93 Difference]: Finished difference Result 12357 states and 18330 transitions. [2023-04-01 06:35:43,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 06:35:43,225 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 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 72 [2023-04-01 06:35:43,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:35:43,256 INFO L225 Difference]: With dead ends: 12357 [2023-04-01 06:35:43,256 INFO L226 Difference]: Without dead ends: 7962 [2023-04-01 06:35:43,266 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 06:35:43,266 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 565 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 565 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 06:35:43,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [565 Valid, 225 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 06:35:43,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7962 states. [2023-04-01 06:35:44,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7962 to 7960. [2023-04-01 06:35:44,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7960 states, 7956 states have (on average 1.4680744092508797) internal successors, (11680), 7956 states have internal predecessors, (11680), 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 06:35:44,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7960 states to 7960 states and 11683 transitions. [2023-04-01 06:35:44,413 INFO L78 Accepts]: Start accepts. Automaton has 7960 states and 11683 transitions. Word has length 72 [2023-04-01 06:35:44,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:35:44,414 INFO L495 AbstractCegarLoop]: Abstraction has 7960 states and 11683 transitions. [2023-04-01 06:35:44,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 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 06:35:44,414 INFO L276 IsEmpty]: Start isEmpty. Operand 7960 states and 11683 transitions. [2023-04-01 06:35:44,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-04-01 06:35:44,419 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:35:44,419 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] [2023-04-01 06:35:44,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 06:35:44,420 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:35:44,420 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:35:44,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1645509495, now seen corresponding path program 1 times [2023-04-01 06:35:44,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:35:44,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779932108] [2023-04-01 06:35:44,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:35:44,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:35:44,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:35:46,019 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 06:35:46,020 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:35:46,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779932108] [2023-04-01 06:35:46,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779932108] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:35:46,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:35:46,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2023-04-01 06:35:46,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125926541] [2023-04-01 06:35:46,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:35:46,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-04-01 06:35:46,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:35:46,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-04-01 06:35:46,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2023-04-01 06:35:46,022 INFO L87 Difference]: Start difference. First operand 7960 states and 11683 transitions. Second operand has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 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 06:35:49,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:35:49,260 INFO L93 Difference]: Finished difference Result 17966 states and 26302 transitions. [2023-04-01 06:35:49,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-01 06:35:49,260 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 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 73 [2023-04-01 06:35:49,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:35:49,321 INFO L225 Difference]: With dead ends: 17966 [2023-04-01 06:35:49,321 INFO L226 Difference]: Without dead ends: 17964 [2023-04-01 06:35:49,331 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=164, Invalid=592, Unknown=0, NotChecked=0, Total=756 [2023-04-01 06:35:49,332 INFO L413 NwaCegarLoop]: 254 mSDtfsCounter, 856 mSDsluCounter, 1853 mSDsCounter, 0 mSdLazyCounter, 1033 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 856 SdHoareTripleChecker+Valid, 2107 SdHoareTripleChecker+Invalid, 1057 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1033 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-01 06:35:49,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [856 Valid, 2107 Invalid, 1057 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1033 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-01 06:35:49,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17964 states. [2023-04-01 06:35:51,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17964 to 14245. [2023-04-01 06:35:51,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14245 states, 14241 states have (on average 1.461484446316972) internal successors, (20813), 14241 states have internal predecessors, (20813), 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 06:35:51,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14245 states to 14245 states and 20816 transitions. [2023-04-01 06:35:51,170 INFO L78 Accepts]: Start accepts. Automaton has 14245 states and 20816 transitions. Word has length 73 [2023-04-01 06:35:51,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:35:51,170 INFO L495 AbstractCegarLoop]: Abstraction has 14245 states and 20816 transitions. [2023-04-01 06:35:51,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 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 06:35:51,171 INFO L276 IsEmpty]: Start isEmpty. Operand 14245 states and 20816 transitions. [2023-04-01 06:35:51,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-04-01 06:35:51,172 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:35:51,172 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] [2023-04-01 06:35:51,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 06:35:51,173 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:35:51,174 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:35:51,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1233544791, now seen corresponding path program 1 times [2023-04-01 06:35:51,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:35:51,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68285471] [2023-04-01 06:35:51,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:35:51,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:35:51,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:35:53,209 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 06:35:53,209 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:35:53,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68285471] [2023-04-01 06:35:53,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68285471] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:35:53,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:35:53,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2023-04-01 06:35:53,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893663432] [2023-04-01 06:35:53,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:35:53,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-04-01 06:35:53,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:35:53,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-04-01 06:35:53,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2023-04-01 06:35:53,211 INFO L87 Difference]: Start difference. First operand 14245 states and 20816 transitions. Second operand has 24 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 23 states have internal predecessors, (70), 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 06:35:57,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:35:57,160 INFO L93 Difference]: Finished difference Result 17403 states and 25343 transitions. [2023-04-01 06:35:57,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-04-01 06:35:57,160 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 23 states have internal predecessors, (70), 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 73 [2023-04-01 06:35:57,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:35:57,204 INFO L225 Difference]: With dead ends: 17403 [2023-04-01 06:35:57,204 INFO L226 Difference]: Without dead ends: 17401 [2023-04-01 06:35:57,213 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=330, Invalid=1230, Unknown=0, NotChecked=0, Total=1560 [2023-04-01 06:35:57,213 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 1408 mSDsluCounter, 1523 mSDsCounter, 0 mSdLazyCounter, 2164 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1408 SdHoareTripleChecker+Valid, 1722 SdHoareTripleChecker+Invalid, 2204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 2164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-04-01 06:35:57,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1408 Valid, 1722 Invalid, 2204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 2164 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-04-01 06:35:57,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17401 states. [2023-04-01 06:35:58,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17401 to 14271. [2023-04-01 06:35:58,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14271 states, 14267 states have (on average 1.4610639938319199) internal successors, (20845), 14267 states have internal predecessors, (20845), 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 06:35:58,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14271 states to 14271 states and 20848 transitions. [2023-04-01 06:35:58,996 INFO L78 Accepts]: Start accepts. Automaton has 14271 states and 20848 transitions. Word has length 73 [2023-04-01 06:35:58,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:35:58,996 INFO L495 AbstractCegarLoop]: Abstraction has 14271 states and 20848 transitions. [2023-04-01 06:35:58,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 23 states have internal predecessors, (70), 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 06:35:58,996 INFO L276 IsEmpty]: Start isEmpty. Operand 14271 states and 20848 transitions. [2023-04-01 06:35:58,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-04-01 06:35:58,998 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:35:58,998 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] [2023-04-01 06:35:58,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-01 06:35:58,998 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:35:58,998 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:35:58,998 INFO L85 PathProgramCache]: Analyzing trace with hash 33193289, now seen corresponding path program 1 times [2023-04-01 06:35:58,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:35:58,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114873475] [2023-04-01 06:35:58,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:35:58,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:35:59,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:36:00,268 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 06:36:00,268 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:36:00,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114873475] [2023-04-01 06:36:00,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114873475] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:36:00,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:36:00,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2023-04-01 06:36:00,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331901175] [2023-04-01 06:36:00,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:36:00,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-04-01 06:36:00,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:36:00,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-04-01 06:36:00,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2023-04-01 06:36:00,271 INFO L87 Difference]: Start difference. First operand 14271 states and 20848 transitions. Second operand has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 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 06:36:02,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:36:02,815 INFO L93 Difference]: Finished difference Result 19475 states and 28380 transitions. [2023-04-01 06:36:02,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-01 06:36:02,816 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 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 73 [2023-04-01 06:36:02,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:36:02,863 INFO L225 Difference]: With dead ends: 19475 [2023-04-01 06:36:02,863 INFO L226 Difference]: Without dead ends: 17489 [2023-04-01 06:36:02,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=166, Invalid=590, Unknown=0, NotChecked=0, Total=756 [2023-04-01 06:36:02,876 INFO L413 NwaCegarLoop]: 345 mSDtfsCounter, 939 mSDsluCounter, 1265 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 939 SdHoareTripleChecker+Valid, 1610 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 06:36:02,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [939 Valid, 1610 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 06:36:02,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17489 states. [2023-04-01 06:36:04,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17489 to 16079. [2023-04-01 06:36:04,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16079 states, 16075 states have (on average 1.4586003110419907) internal successors, (23447), 16075 states have internal predecessors, (23447), 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 06:36:04,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16079 states to 16079 states and 23450 transitions. [2023-04-01 06:36:04,850 INFO L78 Accepts]: Start accepts. Automaton has 16079 states and 23450 transitions. Word has length 73 [2023-04-01 06:36:04,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:36:04,851 INFO L495 AbstractCegarLoop]: Abstraction has 16079 states and 23450 transitions. [2023-04-01 06:36:04,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 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 06:36:04,851 INFO L276 IsEmpty]: Start isEmpty. Operand 16079 states and 23450 transitions. [2023-04-01 06:36:04,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-04-01 06:36:04,852 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:36:04,852 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] [2023-04-01 06:36:04,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-01 06:36:04,853 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:36:04,853 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:36:04,853 INFO L85 PathProgramCache]: Analyzing trace with hash 419635433, now seen corresponding path program 1 times [2023-04-01 06:36:04,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:36:04,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657162979] [2023-04-01 06:36:04,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:36:04,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:36:04,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:36:05,973 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 06:36:05,973 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:36:05,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657162979] [2023-04-01 06:36:05,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657162979] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:36:05,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:36:05,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2023-04-01 06:36:05,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477891030] [2023-04-01 06:36:05,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:36:05,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-04-01 06:36:05,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:36:05,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-04-01 06:36:05,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2023-04-01 06:36:05,975 INFO L87 Difference]: Start difference. First operand 16079 states and 23450 transitions. Second operand has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 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 06:36:09,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:36:09,176 INFO L93 Difference]: Finished difference Result 23474 states and 34211 transitions. [2023-04-01 06:36:09,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-01 06:36:09,176 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 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 73 [2023-04-01 06:36:09,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:36:09,232 INFO L225 Difference]: With dead ends: 23474 [2023-04-01 06:36:09,232 INFO L226 Difference]: Without dead ends: 23472 [2023-04-01 06:36:09,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=164, Invalid=592, Unknown=0, NotChecked=0, Total=756 [2023-04-01 06:36:09,244 INFO L413 NwaCegarLoop]: 357 mSDtfsCounter, 957 mSDsluCounter, 1035 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 957 SdHoareTripleChecker+Valid, 1392 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 06:36:09,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [957 Valid, 1392 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 494 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 06:36:09,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23472 states. [2023-04-01 06:36:11,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23472 to 16101. [2023-04-01 06:36:11,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16101 states, 16097 states have (on average 1.4582841523265204) internal successors, (23474), 16097 states have internal predecessors, (23474), 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 06:36:11,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16101 states to 16101 states and 23477 transitions. [2023-04-01 06:36:11,393 INFO L78 Accepts]: Start accepts. Automaton has 16101 states and 23477 transitions. Word has length 73 [2023-04-01 06:36:11,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:36:11,393 INFO L495 AbstractCegarLoop]: Abstraction has 16101 states and 23477 transitions. [2023-04-01 06:36:11,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 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 06:36:11,393 INFO L276 IsEmpty]: Start isEmpty. Operand 16101 states and 23477 transitions. [2023-04-01 06:36:11,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-04-01 06:36:11,395 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:36:11,395 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] [2023-04-01 06:36:11,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-01 06:36:11,395 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:36:11,396 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:36:11,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1795926057, now seen corresponding path program 1 times [2023-04-01 06:36:11,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:36:11,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629104208] [2023-04-01 06:36:11,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:36:11,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:36:11,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:36:12,604 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 06:36:12,604 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:36:12,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629104208] [2023-04-01 06:36:12,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629104208] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:36:12,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:36:12,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2023-04-01 06:36:12,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305360681] [2023-04-01 06:36:12,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:36:12,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-04-01 06:36:12,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:36:12,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-04-01 06:36:12,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2023-04-01 06:36:12,606 INFO L87 Difference]: Start difference. First operand 16101 states and 23477 transitions. Second operand has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 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 06:36:16,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:36:16,812 INFO L93 Difference]: Finished difference Result 28578 states and 41774 transitions. [2023-04-01 06:36:16,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-01 06:36:16,812 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 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 73 [2023-04-01 06:36:16,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:36:16,877 INFO L225 Difference]: With dead ends: 28578 [2023-04-01 06:36:16,878 INFO L226 Difference]: Without dead ends: 28576 [2023-04-01 06:36:16,889 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=164, Invalid=592, Unknown=0, NotChecked=0, Total=756 [2023-04-01 06:36:16,890 INFO L413 NwaCegarLoop]: 357 mSDtfsCounter, 831 mSDsluCounter, 1240 mSDsCounter, 0 mSdLazyCounter, 772 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 831 SdHoareTripleChecker+Valid, 1597 SdHoareTripleChecker+Invalid, 800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-01 06:36:16,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [831 Valid, 1597 Invalid, 800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 772 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-01 06:36:16,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28576 states. [2023-04-01 06:36:19,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28576 to 17628. [2023-04-01 06:36:19,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17628 states, 17624 states have (on average 1.4593735814798003) internal successors, (25720), 17624 states have internal predecessors, (25720), 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 06:36:19,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17628 states to 17628 states and 25723 transitions. [2023-04-01 06:36:19,348 INFO L78 Accepts]: Start accepts. Automaton has 17628 states and 25723 transitions. Word has length 73 [2023-04-01 06:36:19,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:36:19,348 INFO L495 AbstractCegarLoop]: Abstraction has 17628 states and 25723 transitions. [2023-04-01 06:36:19,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 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 06:36:19,348 INFO L276 IsEmpty]: Start isEmpty. Operand 17628 states and 25723 transitions. [2023-04-01 06:36:19,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-04-01 06:36:19,350 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:36:19,350 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] [2023-04-01 06:36:19,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-01 06:36:19,350 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:36:19,350 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:36:19,350 INFO L85 PathProgramCache]: Analyzing trace with hash -553158434, now seen corresponding path program 1 times [2023-04-01 06:36:19,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:36:19,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94655059] [2023-04-01 06:36:19,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:36:19,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:36:19,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:36:21,122 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 06:36:21,122 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:36:21,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94655059] [2023-04-01 06:36:21,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94655059] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:36:21,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:36:21,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2023-04-01 06:36:21,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122671551] [2023-04-01 06:36:21,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:36:21,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-04-01 06:36:21,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:36:21,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-04-01 06:36:21,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2023-04-01 06:36:21,125 INFO L87 Difference]: Start difference. First operand 17628 states and 25723 transitions. Second operand has 25 states, 25 states have (on average 2.88) internal successors, (72), 24 states have internal predecessors, (72), 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 06:36:27,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:36:27,589 INFO L93 Difference]: Finished difference Result 33915 states and 49460 transitions. [2023-04-01 06:36:27,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-04-01 06:36:27,589 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.88) internal successors, (72), 24 states have internal predecessors, (72), 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 75 [2023-04-01 06:36:27,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:36:27,651 INFO L225 Difference]: With dead ends: 33915 [2023-04-01 06:36:27,651 INFO L226 Difference]: Without dead ends: 33913 [2023-04-01 06:36:27,665 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=351, Invalid=1455, Unknown=0, NotChecked=0, Total=1806 [2023-04-01 06:36:27,665 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 1862 mSDsluCounter, 2030 mSDsCounter, 0 mSdLazyCounter, 2501 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1862 SdHoareTripleChecker+Valid, 2208 SdHoareTripleChecker+Invalid, 2533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 2501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-04-01 06:36:27,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1862 Valid, 2208 Invalid, 2533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 2501 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-04-01 06:36:27,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33913 states.