./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260ebf17-741d-42c9-99e9-8a93d582ec70/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260ebf17-741d-42c9-99e9-8a93d582ec70/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260ebf17-741d-42c9-99e9-8a93d582ec70/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260ebf17-741d-42c9-99e9-8a93d582ec70/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260ebf17-741d-42c9-99e9-8a93d582ec70/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260ebf17-741d-42c9-99e9-8a93d582ec70/bin/utaipan-ByfvJB40ur --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 30f0768bbff34913c5dfb0ad37a2819c04e85c489714efe7283dacc3cb1675b9 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-26 00:00:26,905 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 00:00:26,908 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 00:00:26,929 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 00:00:26,929 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 00:00:26,930 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 00:00:26,932 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 00:00:26,933 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 00:00:26,935 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 00:00:26,936 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 00:00:26,937 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 00:00:26,938 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 00:00:26,939 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 00:00:26,940 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 00:00:26,941 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 00:00:26,942 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 00:00:26,943 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 00:00:26,944 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 00:00:26,946 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 00:00:26,948 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 00:00:26,949 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 00:00:26,951 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 00:00:26,952 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 00:00:26,953 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 00:00:26,957 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 00:00:26,957 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 00:00:26,958 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 00:00:26,959 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 00:00:26,959 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 00:00:26,960 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 00:00:26,961 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 00:00:26,962 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 00:00:26,963 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 00:00:26,963 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 00:00:26,964 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 00:00:26,965 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 00:00:26,966 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 00:00:26,966 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 00:00:26,966 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 00:00:26,967 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 00:00:26,968 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 00:00:26,969 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260ebf17-741d-42c9-99e9-8a93d582ec70/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-26 00:00:26,994 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 00:00:26,994 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 00:00:26,994 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 00:00:26,995 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 00:00:26,995 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 00:00:26,996 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 00:00:26,996 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 00:00:26,996 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 00:00:26,997 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 00:00:26,997 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 00:00:26,997 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 00:00:26,997 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 00:00:26,998 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 00:00:26,998 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 00:00:26,998 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 00:00:26,998 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 00:00:26,999 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 00:00:26,999 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 00:00:27,000 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 00:00:27,000 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 00:00:27,000 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 00:00:27,001 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 00:00:27,001 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 00:00:27,001 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-26 00:00:27,002 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 00:00:27,002 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-26 00:00:27,002 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 00:00:27,002 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-26 00:00:27,003 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 00:00:27,003 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-26 00:00:27,003 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 00:00:27,003 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 00:00:27,004 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:00:27,004 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 00:00:27,004 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 00:00:27,005 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 00:00:27,005 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-26 00:00:27,005 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 00:00:27,005 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 00:00:27,006 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-26 00:00:27,006 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 00:00:27,006 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260ebf17-741d-42c9-99e9-8a93d582ec70/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260ebf17-741d-42c9-99e9-8a93d582ec70/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 30f0768bbff34913c5dfb0ad37a2819c04e85c489714efe7283dacc3cb1675b9 [2022-11-26 00:00:27,307 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 00:00:27,335 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 00:00:27,338 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 00:00:27,339 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 00:00:27,340 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 00:00:27,341 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260ebf17-741d-42c9-99e9-8a93d582ec70/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2022-11-26 00:00:30,512 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 00:00:30,799 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 00:00:30,800 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260ebf17-741d-42c9-99e9-8a93d582ec70/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2022-11-26 00:00:30,817 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260ebf17-741d-42c9-99e9-8a93d582ec70/bin/utaipan-ByfvJB40ur/data/616b548d0/f53af59945af44ffa26296ec7d5c17d4/FLAG25e1ac611 [2022-11-26 00:00:30,839 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260ebf17-741d-42c9-99e9-8a93d582ec70/bin/utaipan-ByfvJB40ur/data/616b548d0/f53af59945af44ffa26296ec7d5c17d4 [2022-11-26 00:00:30,845 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 00:00:30,847 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 00:00:30,848 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 00:00:30,849 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 00:00:30,853 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 00:00:30,854 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:00:30" (1/1) ... [2022-11-26 00:00:30,855 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68cb0f73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:30, skipping insertion in model container [2022-11-26 00:00:30,856 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:00:30" (1/1) ... [2022-11-26 00:00:30,864 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 00:00:30,906 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:00:31,213 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260ebf17-741d-42c9-99e9-8a93d582ec70/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[9094,9107] [2022-11-26 00:00:31,300 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:00:31,324 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 00:00:31,407 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260ebf17-741d-42c9-99e9-8a93d582ec70/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[9094,9107] [2022-11-26 00:00:31,468 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:00:31,490 INFO L208 MainTranslator]: Completed translation [2022-11-26 00:00:31,490 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:31 WrapperNode [2022-11-26 00:00:31,491 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 00:00:31,492 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 00:00:31,492 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 00:00:31,492 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 00:00:31,501 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:31" (1/1) ... [2022-11-26 00:00:31,520 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:31" (1/1) ... [2022-11-26 00:00:31,582 INFO L138 Inliner]: procedures = 26, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 731 [2022-11-26 00:00:31,582 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 00:00:31,583 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 00:00:31,583 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 00:00:31,583 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 00:00:31,593 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:31" (1/1) ... [2022-11-26 00:00:31,594 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:31" (1/1) ... [2022-11-26 00:00:31,606 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:31" (1/1) ... [2022-11-26 00:00:31,620 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:31" (1/1) ... [2022-11-26 00:00:31,630 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:31" (1/1) ... [2022-11-26 00:00:31,636 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:31" (1/1) ... [2022-11-26 00:00:31,639 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:31" (1/1) ... [2022-11-26 00:00:31,641 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:31" (1/1) ... [2022-11-26 00:00:31,650 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 00:00:31,659 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 00:00:31,659 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 00:00:31,660 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 00:00:31,661 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:31" (1/1) ... [2022-11-26 00:00:31,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:00:31,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260ebf17-741d-42c9-99e9-8a93d582ec70/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:00:31,700 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260ebf17-741d-42c9-99e9-8a93d582ec70/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 00:00:31,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260ebf17-741d-42c9-99e9-8a93d582ec70/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 00:00:31,755 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 00:00:31,756 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-26 00:00:31,756 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 00:00:31,756 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 00:00:31,942 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 00:00:31,945 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 00:00:32,803 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 00:00:33,038 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 00:00:33,039 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-26 00:00:33,042 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:00:33 BoogieIcfgContainer [2022-11-26 00:00:33,042 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 00:00:33,044 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 00:00:33,044 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 00:00:33,048 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 00:00:33,048 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:00:30" (1/3) ... [2022-11-26 00:00:33,051 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51e4675c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:00:33, skipping insertion in model container [2022-11-26 00:00:33,051 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:31" (2/3) ... [2022-11-26 00:00:33,052 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51e4675c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:00:33, skipping insertion in model container [2022-11-26 00:00:33,053 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:00:33" (3/3) ... [2022-11-26 00:00:33,055 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2022-11-26 00:00:33,084 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 00:00:33,085 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-26 00:00:33,174 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 00:00:33,185 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;@3d1134c7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 00:00:33,186 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-26 00:00:33,194 INFO L276 IsEmpty]: Start isEmpty. Operand has 124 states, 122 states have (on average 1.7704918032786885) internal successors, (216), 123 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:00:33,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-26 00:00:33,206 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:00:33,207 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:00:33,207 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:00:33,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:00:33,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1269394098, now seen corresponding path program 1 times [2022-11-26 00:00:33,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:00:33,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735225190] [2022-11-26 00:00:33,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:00:33,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:00:33,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:00:33,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:00:33,955 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:00:33,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735225190] [2022-11-26 00:00:33,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735225190] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:00:33,958 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:00:33,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:00:33,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543165621] [2022-11-26 00:00:33,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:00:33,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:00:33,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:00:33,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:00:34,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:00:34,003 INFO L87 Difference]: Start difference. First operand has 124 states, 122 states have (on average 1.7704918032786885) internal successors, (216), 123 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:00:34,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:00:34,398 INFO L93 Difference]: Finished difference Result 191 states and 317 transitions. [2022-11-26 00:00:34,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:00:34,402 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2022-11-26 00:00:34,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:00:34,413 INFO L225 Difference]: With dead ends: 191 [2022-11-26 00:00:34,413 INFO L226 Difference]: Without dead ends: 122 [2022-11-26 00:00:34,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:00:34,421 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 506 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 506 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:00:34,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [506 Valid, 197 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:00:34,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-11-26 00:00:34,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2022-11-26 00:00:34,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.2148760330578512) internal successors, (147), 121 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:00:34,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 147 transitions. [2022-11-26 00:00:34,520 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 147 transitions. Word has length 77 [2022-11-26 00:00:34,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:00:34,523 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 147 transitions. [2022-11-26 00:00:34,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:00:34,524 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 147 transitions. [2022-11-26 00:00:34,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-26 00:00:34,529 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:00:34,530 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:00:34,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-26 00:00:34,531 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:00:34,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:00:34,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1646034187, now seen corresponding path program 1 times [2022-11-26 00:00:34,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:00:34,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689584777] [2022-11-26 00:00:34,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:00:34,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:00:34,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:00:34,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:00:34,840 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:00:34,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689584777] [2022-11-26 00:00:34,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689584777] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:00:34,841 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:00:34,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:00:34,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084689391] [2022-11-26 00:00:34,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:00:34,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:00:34,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:00:34,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:00:34,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:00:34,845 INFO L87 Difference]: Start difference. First operand 122 states and 147 transitions. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:00:35,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:00:35,035 INFO L93 Difference]: Finished difference Result 191 states and 238 transitions. [2022-11-26 00:00:35,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:00:35,036 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2022-11-26 00:00:35,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:00:35,044 INFO L225 Difference]: With dead ends: 191 [2022-11-26 00:00:35,044 INFO L226 Difference]: Without dead ends: 122 [2022-11-26 00:00:35,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:00:35,053 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 362 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:00:35,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [362 Valid, 92 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:00:35,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-11-26 00:00:35,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2022-11-26 00:00:35,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.1983471074380165) internal successors, (145), 121 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:00:35,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 145 transitions. [2022-11-26 00:00:35,086 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 145 transitions. Word has length 78 [2022-11-26 00:00:35,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:00:35,089 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 145 transitions. [2022-11-26 00:00:35,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:00:35,090 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 145 transitions. [2022-11-26 00:00:35,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-26 00:00:35,100 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:00:35,100 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:00:35,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-26 00:00:35,102 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:00:35,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:00:35,108 INFO L85 PathProgramCache]: Analyzing trace with hash -513507090, now seen corresponding path program 1 times [2022-11-26 00:00:35,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:00:35,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648581906] [2022-11-26 00:00:35,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:00:35,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:00:35,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:00:35,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:00:35,368 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:00:35,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648581906] [2022-11-26 00:00:35,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648581906] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:00:35,369 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:00:35,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:00:35,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381330625] [2022-11-26 00:00:35,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:00:35,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:00:35,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:00:35,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:00:35,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:00:35,371 INFO L87 Difference]: Start difference. First operand 122 states and 145 transitions. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:00:35,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:00:35,558 INFO L93 Difference]: Finished difference Result 187 states and 230 transitions. [2022-11-26 00:00:35,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:00:35,559 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2022-11-26 00:00:35,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:00:35,562 INFO L225 Difference]: With dead ends: 187 [2022-11-26 00:00:35,562 INFO L226 Difference]: Without dead ends: 122 [2022-11-26 00:00:35,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:00:35,571 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 344 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:00:35,572 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [344 Valid, 100 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:00:35,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-11-26 00:00:35,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2022-11-26 00:00:35,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.1818181818181819) internal successors, (143), 121 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:00:35,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 143 transitions. [2022-11-26 00:00:35,592 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 143 transitions. Word has length 79 [2022-11-26 00:00:35,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:00:35,593 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 143 transitions. [2022-11-26 00:00:35,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:00:35,594 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 143 transitions. [2022-11-26 00:00:35,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-26 00:00:35,596 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:00:35,596 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:00:35,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-26 00:00:35,597 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:00:35,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:00:35,598 INFO L85 PathProgramCache]: Analyzing trace with hash -540998025, now seen corresponding path program 1 times [2022-11-26 00:00:35,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:00:35,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365066360] [2022-11-26 00:00:35,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:00:35,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:00:35,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:00:35,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:00:35,778 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:00:35,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365066360] [2022-11-26 00:00:35,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365066360] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:00:35,779 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:00:35,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:00:35,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049805129] [2022-11-26 00:00:35,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:00:35,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:00:35,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:00:35,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:00:35,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:00:35,783 INFO L87 Difference]: Start difference. First operand 122 states and 143 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:00:35,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:00:35,962 INFO L93 Difference]: Finished difference Result 195 states and 235 transitions. [2022-11-26 00:00:35,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:00:35,963 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-11-26 00:00:35,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:00:35,967 INFO L225 Difference]: With dead ends: 195 [2022-11-26 00:00:35,967 INFO L226 Difference]: Without dead ends: 122 [2022-11-26 00:00:35,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:00:35,979 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 361 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:00:35,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [361 Valid, 84 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:00:35,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-11-26 00:00:36,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2022-11-26 00:00:36,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.165289256198347) internal successors, (141), 121 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:00:36,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 141 transitions. [2022-11-26 00:00:36,006 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 141 transitions. Word has length 80 [2022-11-26 00:00:36,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:00:36,007 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 141 transitions. [2022-11-26 00:00:36,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:00:36,007 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 141 transitions. [2022-11-26 00:00:36,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-26 00:00:36,011 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:00:36,011 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:00:36,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-26 00:00:36,012 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:00:36,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:00:36,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1188164518, now seen corresponding path program 1 times [2022-11-26 00:00:36,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:00:36,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365682670] [2022-11-26 00:00:36,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:00:36,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:00:36,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:00:36,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:00:36,244 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:00:36,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365682670] [2022-11-26 00:00:36,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365682670] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:00:36,245 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:00:36,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:00:36,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866601950] [2022-11-26 00:00:36,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:00:36,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:00:36,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:00:36,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:00:36,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:00:36,250 INFO L87 Difference]: Start difference. First operand 122 states and 141 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:00:36,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:00:36,435 INFO L93 Difference]: Finished difference Result 199 states and 236 transitions. [2022-11-26 00:00:36,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:00:36,436 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2022-11-26 00:00:36,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:00:36,438 INFO L225 Difference]: With dead ends: 199 [2022-11-26 00:00:36,438 INFO L226 Difference]: Without dead ends: 122 [2022-11-26 00:00:36,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:00:36,440 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 304 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:00:36,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [304 Valid, 103 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:00:36,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-11-26 00:00:36,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2022-11-26 00:00:36,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.1570247933884297) internal successors, (140), 121 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:00:36,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 140 transitions. [2022-11-26 00:00:36,483 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 140 transitions. Word has length 81 [2022-11-26 00:00:36,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:00:36,486 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 140 transitions. [2022-11-26 00:00:36,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:00:36,486 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 140 transitions. [2022-11-26 00:00:36,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-26 00:00:36,496 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:00:36,497 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:00:36,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-26 00:00:36,497 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:00:36,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:00:36,498 INFO L85 PathProgramCache]: Analyzing trace with hash 645623011, now seen corresponding path program 1 times [2022-11-26 00:00:36,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:00:36,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368433605] [2022-11-26 00:00:36,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:00:36,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:00:36,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:00:36,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:00:36,730 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:00:36,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368433605] [2022-11-26 00:00:36,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368433605] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:00:36,731 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:00:36,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:00:36,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085329468] [2022-11-26 00:00:36,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:00:36,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:00:36,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:00:36,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:00:36,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:00:36,733 INFO L87 Difference]: Start difference. First operand 122 states and 140 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:00:36,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:00:36,872 INFO L93 Difference]: Finished difference Result 179 states and 214 transitions. [2022-11-26 00:00:36,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:00:36,873 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2022-11-26 00:00:36,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:00:36,874 INFO L225 Difference]: With dead ends: 179 [2022-11-26 00:00:36,874 INFO L226 Difference]: Without dead ends: 122 [2022-11-26 00:00:36,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:00:36,876 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 303 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:00:36,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [303 Valid, 116 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:00:36,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-11-26 00:00:36,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2022-11-26 00:00:36,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.140495867768595) internal successors, (138), 121 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:00:36,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 138 transitions. [2022-11-26 00:00:36,900 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 138 transitions. Word has length 82 [2022-11-26 00:00:36,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:00:36,901 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 138 transitions. [2022-11-26 00:00:36,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:00:36,901 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 138 transitions. [2022-11-26 00:00:36,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-26 00:00:36,902 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:00:36,902 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:00:36,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-26 00:00:36,903 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:00:36,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:00:36,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1891597942, now seen corresponding path program 1 times [2022-11-26 00:00:36,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:00:36,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222007184] [2022-11-26 00:00:36,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:00:36,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:00:37,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:00:54,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:00:54,149 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:00:54,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222007184] [2022-11-26 00:00:54,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222007184] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:00:54,150 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:00:54,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-11-26 00:00:54,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936331464] [2022-11-26 00:00:54,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:00:54,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-26 00:00:54,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:00:54,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-26 00:00:54,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1735, Unknown=0, NotChecked=0, Total=1892 [2022-11-26 00:00:54,153 INFO L87 Difference]: Start difference. First operand 122 states and 138 transitions. Second operand has 44 states, 44 states have (on average 1.8863636363636365) internal successors, (83), 43 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:01:19,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:01:19,285 INFO L93 Difference]: Finished difference Result 292 states and 368 transitions. [2022-11-26 00:01:19,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-26 00:01:19,286 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.8863636363636365) internal successors, (83), 43 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2022-11-26 00:01:19,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:01:19,288 INFO L225 Difference]: With dead ends: 292 [2022-11-26 00:01:19,288 INFO L226 Difference]: Without dead ends: 248 [2022-11-26 00:01:19,291 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 947 ImplicationChecksByTransitivity, 25.4s TimeCoverageRelationStatistics Valid=1486, Invalid=5320, Unknown=0, NotChecked=0, Total=6806 [2022-11-26 00:01:19,292 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 1055 mSDsluCounter, 1503 mSDsCounter, 0 mSdLazyCounter, 3443 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1055 SdHoareTripleChecker+Valid, 1576 SdHoareTripleChecker+Invalid, 3449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 3443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-11-26 00:01:19,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1055 Valid, 1576 Invalid, 3449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 3443 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2022-11-26 00:01:19,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-11-26 00:01:19,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 161. [2022-11-26 00:01:19,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.19375) internal successors, (191), 160 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:01:19,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 191 transitions. [2022-11-26 00:01:19,339 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 191 transitions. Word has length 83 [2022-11-26 00:01:19,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:01:19,339 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 191 transitions. [2022-11-26 00:01:19,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.8863636363636365) internal successors, (83), 43 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:01:19,340 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 191 transitions. [2022-11-26 00:01:19,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-11-26 00:01:19,340 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:01:19,341 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:01:19,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-26 00:01:19,341 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:01:19,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:01:19,342 INFO L85 PathProgramCache]: Analyzing trace with hash -71974936, now seen corresponding path program 1 times [2022-11-26 00:01:19,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:01:19,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628900964] [2022-11-26 00:01:19,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:01:19,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:01:19,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:01:19,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:01:19,604 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:01:19,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628900964] [2022-11-26 00:01:19,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628900964] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:01:19,605 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:01:19,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:01:19,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514721927] [2022-11-26 00:01:19,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:01:19,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:01:19,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:01:19,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:01:19,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:01:19,607 INFO L87 Difference]: Start difference. First operand 161 states and 191 transitions. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:01:19,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:01:19,781 INFO L93 Difference]: Finished difference Result 327 states and 417 transitions. [2022-11-26 00:01:19,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:01:19,781 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2022-11-26 00:01:19,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:01:19,783 INFO L225 Difference]: With dead ends: 327 [2022-11-26 00:01:19,783 INFO L226 Difference]: Without dead ends: 244 [2022-11-26 00:01:19,784 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:01:19,785 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 56 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:01:19,786 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 363 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:01:19,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-11-26 00:01:19,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 242. [2022-11-26 00:01:19,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 1.2531120331950207) internal successors, (302), 241 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:01:19,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 302 transitions. [2022-11-26 00:01:19,863 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 302 transitions. Word has length 85 [2022-11-26 00:01:19,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:01:19,864 INFO L495 AbstractCegarLoop]: Abstraction has 242 states and 302 transitions. [2022-11-26 00:01:19,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:01:19,864 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 302 transitions. [2022-11-26 00:01:19,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-11-26 00:01:19,865 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:01:19,865 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:01:19,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-26 00:01:19,866 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:01:19,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:01:19,867 INFO L85 PathProgramCache]: Analyzing trace with hash 158518031, now seen corresponding path program 1 times [2022-11-26 00:01:19,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:01:19,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700952376] [2022-11-26 00:01:19,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:01:19,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:01:20,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:01:36,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:01:36,828 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:01:36,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700952376] [2022-11-26 00:01:36,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700952376] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:01:36,829 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:01:36,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-11-26 00:01:36,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183608053] [2022-11-26 00:01:36,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:01:36,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-26 00:01:36,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:01:36,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-26 00:01:36,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1808, Unknown=0, NotChecked=0, Total=1980 [2022-11-26 00:01:36,832 INFO L87 Difference]: Start difference. First operand 242 states and 302 transitions. Second operand has 45 states, 45 states have (on average 1.8888888888888888) internal successors, (85), 44 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:02:00,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:02:00,872 INFO L93 Difference]: Finished difference Result 491 states and 641 transitions. [2022-11-26 00:02:00,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-26 00:02:00,873 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.8888888888888888) internal successors, (85), 44 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2022-11-26 00:02:00,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:02:00,874 INFO L225 Difference]: With dead ends: 491 [2022-11-26 00:02:00,875 INFO L226 Difference]: Without dead ends: 327 [2022-11-26 00:02:00,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 25.3s TimeCoverageRelationStatistics Valid=1408, Invalid=4598, Unknown=0, NotChecked=0, Total=6006 [2022-11-26 00:02:00,877 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 1009 mSDsluCounter, 1140 mSDsCounter, 0 mSdLazyCounter, 2633 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1009 SdHoareTripleChecker+Valid, 1250 SdHoareTripleChecker+Invalid, 2636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 2633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-11-26 00:02:00,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1009 Valid, 1250 Invalid, 2636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 2633 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2022-11-26 00:02:00,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2022-11-26 00:02:00,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 325. [2022-11-26 00:02:00,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 1.2777777777777777) internal successors, (414), 324 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:02:00,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 414 transitions. [2022-11-26 00:02:00,996 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 414 transitions. Word has length 85 [2022-11-26 00:02:00,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:02:00,996 INFO L495 AbstractCegarLoop]: Abstraction has 325 states and 414 transitions. [2022-11-26 00:02:00,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.8888888888888888) internal successors, (85), 44 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:02:00,997 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 414 transitions. [2022-11-26 00:02:00,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-26 00:02:00,998 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:02:00,998 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:02:00,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-26 00:02:00,999 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:02:00,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:02:00,999 INFO L85 PathProgramCache]: Analyzing trace with hash 630767134, now seen corresponding path program 1 times [2022-11-26 00:02:01,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:02:01,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064521315] [2022-11-26 00:02:01,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:02:01,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:02:01,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:02:01,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:02:01,331 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:02:01,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064521315] [2022-11-26 00:02:01,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064521315] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:02:01,331 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:02:01,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-26 00:02:01,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779236418] [2022-11-26 00:02:01,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:02:01,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 00:02:01,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:02:01,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 00:02:01,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:02:01,334 INFO L87 Difference]: Start difference. First operand 325 states and 414 transitions. Second operand has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:02:01,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:02:01,722 INFO L93 Difference]: Finished difference Result 635 states and 831 transitions. [2022-11-26 00:02:01,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-26 00:02:01,723 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2022-11-26 00:02:01,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:02:01,725 INFO L225 Difference]: With dead ends: 635 [2022-11-26 00:02:01,726 INFO L226 Difference]: Without dead ends: 510 [2022-11-26 00:02:01,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-26 00:02:01,727 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 287 mSDsluCounter, 545 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 710 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:02:01,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [287 Valid, 710 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:02:01,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2022-11-26 00:02:01,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 282. [2022-11-26 00:02:01,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 1.2597864768683273) internal successors, (354), 281 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:02:01,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 354 transitions. [2022-11-26 00:02:01,855 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 354 transitions. Word has length 86 [2022-11-26 00:02:01,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:02:01,856 INFO L495 AbstractCegarLoop]: Abstraction has 282 states and 354 transitions. [2022-11-26 00:02:01,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:02:01,856 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 354 transitions. [2022-11-26 00:02:01,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-26 00:02:01,858 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:02:01,858 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:02:01,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-26 00:02:01,859 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:02:01,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:02:01,860 INFO L85 PathProgramCache]: Analyzing trace with hash 627708026, now seen corresponding path program 1 times [2022-11-26 00:02:01,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:02:01,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55709077] [2022-11-26 00:02:01,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:02:01,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:02:01,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:02:02,036 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:02:02,036 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:02:02,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55709077] [2022-11-26 00:02:02,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55709077] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:02:02,037 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:02:02,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:02:02,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416765949] [2022-11-26 00:02:02,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:02:02,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:02:02,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:02:02,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:02:02,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:02:02,039 INFO L87 Difference]: Start difference. First operand 282 states and 354 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:02:02,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:02:02,254 INFO L93 Difference]: Finished difference Result 556 states and 727 transitions. [2022-11-26 00:02:02,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:02:02,255 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2022-11-26 00:02:02,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:02:02,257 INFO L225 Difference]: With dead ends: 556 [2022-11-26 00:02:02,257 INFO L226 Difference]: Without dead ends: 352 [2022-11-26 00:02:02,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:02:02,258 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 51 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:02:02,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 280 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:02:02,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2022-11-26 00:02:02,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 334. [2022-11-26 00:02:02,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 1.2672672672672673) internal successors, (422), 333 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:02:02,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 422 transitions. [2022-11-26 00:02:02,405 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 422 transitions. Word has length 101 [2022-11-26 00:02:02,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:02:02,406 INFO L495 AbstractCegarLoop]: Abstraction has 334 states and 422 transitions. [2022-11-26 00:02:02,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:02:02,406 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 422 transitions. [2022-11-26 00:02:02,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-11-26 00:02:02,407 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:02:02,408 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:02:02,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-26 00:02:02,408 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:02:02,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:02:02,409 INFO L85 PathProgramCache]: Analyzing trace with hash -153234882, now seen corresponding path program 1 times [2022-11-26 00:02:02,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:02:02,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587027191] [2022-11-26 00:02:02,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:02:02,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:02:02,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:02:02,585 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:02:02,585 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:02:02,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587027191] [2022-11-26 00:02:02,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587027191] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:02:02,586 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:02:02,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:02:02,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137267504] [2022-11-26 00:02:02,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:02:02,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:02:02,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:02:02,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:02:02,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:02:02,589 INFO L87 Difference]: Start difference. First operand 334 states and 422 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:02:02,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:02:02,867 INFO L93 Difference]: Finished difference Result 758 states and 998 transitions. [2022-11-26 00:02:02,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:02:02,868 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2022-11-26 00:02:02,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:02:02,870 INFO L225 Difference]: With dead ends: 758 [2022-11-26 00:02:02,870 INFO L226 Difference]: Without dead ends: 506 [2022-11-26 00:02:02,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:02:02,872 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 46 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:02:02,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 274 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:02:02,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2022-11-26 00:02:03,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 480. [2022-11-26 00:02:03,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 479 states have (on average 1.2964509394572026) internal successors, (621), 479 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:02:03,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 621 transitions. [2022-11-26 00:02:03,057 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 621 transitions. Word has length 104 [2022-11-26 00:02:03,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:02:03,058 INFO L495 AbstractCegarLoop]: Abstraction has 480 states and 621 transitions. [2022-11-26 00:02:03,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:02:03,058 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 621 transitions. [2022-11-26 00:02:03,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-11-26 00:02:03,060 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:02:03,060 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:02:03,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-26 00:02:03,060 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:02:03,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:02:03,061 INFO L85 PathProgramCache]: Analyzing trace with hash -968341393, now seen corresponding path program 1 times [2022-11-26 00:02:03,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:02:03,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618161083] [2022-11-26 00:02:03,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:02:03,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:02:03,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:02:03,210 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:02:03,210 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:02:03,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618161083] [2022-11-26 00:02:03,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618161083] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:02:03,211 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:02:03,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:02:03,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599621702] [2022-11-26 00:02:03,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:02:03,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:02:03,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:02:03,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:02:03,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:02:03,213 INFO L87 Difference]: Start difference. First operand 480 states and 621 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:02:03,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:02:03,568 INFO L93 Difference]: Finished difference Result 1214 states and 1619 transitions. [2022-11-26 00:02:03,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:02:03,568 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2022-11-26 00:02:03,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:02:03,571 INFO L225 Difference]: With dead ends: 1214 [2022-11-26 00:02:03,572 INFO L226 Difference]: Without dead ends: 816 [2022-11-26 00:02:03,573 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:02:03,574 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 41 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:02:03,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 267 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:02:03,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 816 states. [2022-11-26 00:02:03,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 816 to 778. [2022-11-26 00:02:03,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 778 states, 777 states have (on average 1.3191763191763193) internal successors, (1025), 777 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:02:03,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 778 states to 778 states and 1025 transitions. [2022-11-26 00:02:03,875 INFO L78 Accepts]: Start accepts. Automaton has 778 states and 1025 transitions. Word has length 107 [2022-11-26 00:02:03,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:02:03,876 INFO L495 AbstractCegarLoop]: Abstraction has 778 states and 1025 transitions. [2022-11-26 00:02:03,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:02:03,876 INFO L276 IsEmpty]: Start isEmpty. Operand 778 states and 1025 transitions. [2022-11-26 00:02:03,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-26 00:02:03,877 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:02:03,877 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:02:03,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-26 00:02:03,878 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:02:03,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:02:03,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1044275033, now seen corresponding path program 1 times [2022-11-26 00:02:03,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:02:03,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656475737] [2022-11-26 00:02:03,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:02:03,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:02:03,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:02:04,031 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:02:04,032 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:02:04,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656475737] [2022-11-26 00:02:04,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656475737] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:02:04,032 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:02:04,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:02:04,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165295661] [2022-11-26 00:02:04,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:02:04,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:02:04,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:02:04,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:02:04,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:02:04,034 INFO L87 Difference]: Start difference. First operand 778 states and 1025 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:02:04,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:02:04,652 INFO L93 Difference]: Finished difference Result 2126 states and 2855 transitions. [2022-11-26 00:02:04,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:02:04,653 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2022-11-26 00:02:04,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:02:04,659 INFO L225 Difference]: With dead ends: 2126 [2022-11-26 00:02:04,659 INFO L226 Difference]: Without dead ends: 1430 [2022-11-26 00:02:04,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:02:04,662 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 36 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:02:04,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 260 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:02:04,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1430 states. [2022-11-26 00:02:05,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1430 to 1368. [2022-11-26 00:02:05,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1368 states, 1367 states have (on average 1.332114118507681) internal successors, (1821), 1367 states have internal predecessors, (1821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:02:05,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1368 states to 1368 states and 1821 transitions. [2022-11-26 00:02:05,153 INFO L78 Accepts]: Start accepts. Automaton has 1368 states and 1821 transitions. Word has length 110 [2022-11-26 00:02:05,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:02:05,153 INFO L495 AbstractCegarLoop]: Abstraction has 1368 states and 1821 transitions. [2022-11-26 00:02:05,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:02:05,154 INFO L276 IsEmpty]: Start isEmpty. Operand 1368 states and 1821 transitions. [2022-11-26 00:02:05,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-26 00:02:05,155 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:02:05,155 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:02:05,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-26 00:02:05,156 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:02:05,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:02:05,156 INFO L85 PathProgramCache]: Analyzing trace with hash 2140177647, now seen corresponding path program 1 times [2022-11-26 00:02:05,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:02:05,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667071012] [2022-11-26 00:02:05,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:02:05,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:02:05,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:02:05,315 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:02:05,316 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:02:05,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667071012] [2022-11-26 00:02:05,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667071012] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:02:05,316 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:02:05,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:02:05,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916761184] [2022-11-26 00:02:05,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:02:05,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:02:05,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:02:05,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:02:05,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:02:05,319 INFO L87 Difference]: Start difference. First operand 1368 states and 1821 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:02:06,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:02:06,494 INFO L93 Difference]: Finished difference Result 3914 states and 5267 transitions. [2022-11-26 00:02:06,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:02:06,495 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2022-11-26 00:02:06,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:02:06,504 INFO L225 Difference]: With dead ends: 3914 [2022-11-26 00:02:06,504 INFO L226 Difference]: Without dead ends: 2628 [2022-11-26 00:02:06,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:02:06,509 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 31 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:02:06,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 253 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:02:06,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2628 states. [2022-11-26 00:02:07,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2628 to 2518. [2022-11-26 00:02:07,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2518 states, 2517 states have (on average 1.3369090186730235) internal successors, (3365), 2517 states have internal predecessors, (3365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:02:07,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2518 states to 2518 states and 3365 transitions. [2022-11-26 00:02:07,249 INFO L78 Accepts]: Start accepts. Automaton has 2518 states and 3365 transitions. Word has length 113 [2022-11-26 00:02:07,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:02:07,249 INFO L495 AbstractCegarLoop]: Abstraction has 2518 states and 3365 transitions. [2022-11-26 00:02:07,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:02:07,250 INFO L276 IsEmpty]: Start isEmpty. Operand 2518 states and 3365 transitions. [2022-11-26 00:02:07,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-26 00:02:07,251 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:02:07,251 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:02:07,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-26 00:02:07,252 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:02:07,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:02:07,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1258154352, now seen corresponding path program 1 times [2022-11-26 00:02:07,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:02:07,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270541908] [2022-11-26 00:02:07,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:02:07,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:02:07,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:02:07,402 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:02:07,403 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:02:07,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270541908] [2022-11-26 00:02:07,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270541908] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:02:07,403 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:02:07,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:02:07,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654909380] [2022-11-26 00:02:07,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:02:07,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:02:07,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:02:07,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:02:07,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:02:07,405 INFO L87 Difference]: Start difference. First operand 2518 states and 3365 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:02:09,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:02:09,658 INFO L93 Difference]: Finished difference Result 7382 states and 9923 transitions. [2022-11-26 00:02:09,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:02:09,658 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2022-11-26 00:02:09,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:02:09,677 INFO L225 Difference]: With dead ends: 7382 [2022-11-26 00:02:09,677 INFO L226 Difference]: Without dead ends: 4946 [2022-11-26 00:02:09,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:02:09,683 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 26 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:02:09,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 242 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:02:09,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4946 states. [2022-11-26 00:02:11,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4946 to 4740. [2022-11-26 00:02:11,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4740 states, 4739 states have (on average 1.33635788140958) internal successors, (6333), 4739 states have internal predecessors, (6333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:02:11,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4740 states to 4740 states and 6333 transitions. [2022-11-26 00:02:11,128 INFO L78 Accepts]: Start accepts. Automaton has 4740 states and 6333 transitions. Word has length 116 [2022-11-26 00:02:11,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:02:11,129 INFO L495 AbstractCegarLoop]: Abstraction has 4740 states and 6333 transitions. [2022-11-26 00:02:11,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:02:11,129 INFO L276 IsEmpty]: Start isEmpty. Operand 4740 states and 6333 transitions. [2022-11-26 00:02:11,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-26 00:02:11,131 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:02:11,131 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:02:11,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-26 00:02:11,132 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:02:11,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:02:11,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1922414867, now seen corresponding path program 1 times [2022-11-26 00:02:11,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:02:11,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8025338] [2022-11-26 00:02:11,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:02:11,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:02:11,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:02:11,544 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-26 00:02:11,545 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:02:11,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8025338] [2022-11-26 00:02:11,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8025338] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:02:11,545 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:02:11,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-26 00:02:11,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804422983] [2022-11-26 00:02:11,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:02:11,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 00:02:11,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:02:11,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 00:02:11,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:02:11,548 INFO L87 Difference]: Start difference. First operand 4740 states and 6333 transitions. Second operand has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 5 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:02:13,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:02:13,598 INFO L93 Difference]: Finished difference Result 9398 states and 12584 transitions. [2022-11-26 00:02:13,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 00:02:13,599 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 5 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 137 [2022-11-26 00:02:13,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:02:13,616 INFO L225 Difference]: With dead ends: 9398 [2022-11-26 00:02:13,616 INFO L226 Difference]: Without dead ends: 4740 [2022-11-26 00:02:13,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-11-26 00:02:13,622 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 250 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:02:13,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 103 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:02:13,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4740 states. [2022-11-26 00:02:15,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4740 to 4740. [2022-11-26 00:02:15,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4740 states, 4739 states have (on average 1.3025954842793839) internal successors, (6173), 4739 states have internal predecessors, (6173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:02:15,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4740 states to 4740 states and 6173 transitions. [2022-11-26 00:02:15,317 INFO L78 Accepts]: Start accepts. Automaton has 4740 states and 6173 transitions. Word has length 137 [2022-11-26 00:02:15,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:02:15,318 INFO L495 AbstractCegarLoop]: Abstraction has 4740 states and 6173 transitions. [2022-11-26 00:02:15,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 5 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:02:15,318 INFO L276 IsEmpty]: Start isEmpty. Operand 4740 states and 6173 transitions. [2022-11-26 00:02:15,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-26 00:02:15,320 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:02:15,320 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:02:15,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-26 00:02:15,321 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:02:15,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:02:15,321 INFO L85 PathProgramCache]: Analyzing trace with hash -509506290, now seen corresponding path program 1 times [2022-11-26 00:02:15,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:02:15,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129134657] [2022-11-26 00:02:15,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:02:15,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:02:15,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:04:44,812 WARN L233 SmtUtils]: Spent 5.23s on a formula simplification. DAG size of input: 353 DAG size of output: 348 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:05:05,560 WARN L233 SmtUtils]: Spent 5.36s on a formula simplification. DAG size of input: 348 DAG size of output: 346 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:06:09,436 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:06:09,436 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:06:09,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129134657] [2022-11-26 00:06:09,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129134657] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:06:09,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202486380] [2022-11-26 00:06:09,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:06:09,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:06:09,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260ebf17-741d-42c9-99e9-8a93d582ec70/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:06:09,442 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260ebf17-741d-42c9-99e9-8a93d582ec70/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:06:09,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260ebf17-741d-42c9-99e9-8a93d582ec70/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-26 00:06:09,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:06:09,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 661 conjuncts, 155 conjunts are in the unsatisfiable core [2022-11-26 00:06:09,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:09:21,904 WARN L233 SmtUtils]: Spent 21.47s on a formula simplification. DAG size of input: 243 DAG size of output: 239 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)