./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec9_product25.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 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_2b1470ea-1ed4-4107-a790-9bc73094447a/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1470ea-1ed4-4107-a790-9bc73094447a/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1470ea-1ed4-4107-a790-9bc73094447a/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1470ea-1ed4-4107-a790-9bc73094447a/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec9_product25.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1470ea-1ed4-4107-a790-9bc73094447a/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1470ea-1ed4-4107-a790-9bc73094447a/bin/utaipan-Q6hlc19bkW --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 68864d90c2581c7e2b9a72172352bcf9279d03107788434bd4ac5af6cc5db51a --- 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-4e7fbc6 [2022-11-23 14:26:08,874 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 14:26:08,884 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 14:26:08,912 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 14:26:08,913 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 14:26:08,917 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 14:26:08,919 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 14:26:08,923 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 14:26:08,925 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 14:26:08,931 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 14:26:08,933 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 14:26:08,936 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 14:26:08,936 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 14:26:08,941 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 14:26:08,943 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 14:26:08,945 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 14:26:08,946 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 14:26:08,947 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 14:26:08,949 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 14:26:08,956 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 14:26:08,957 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 14:26:08,959 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 14:26:08,961 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 14:26:08,962 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 14:26:08,972 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 14:26:08,973 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 14:26:08,973 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 14:26:08,975 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 14:26:08,976 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 14:26:08,977 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 14:26:08,978 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 14:26:08,979 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 14:26:08,981 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 14:26:08,982 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 14:26:08,983 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 14:26:08,983 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 14:26:08,984 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 14:26:08,984 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 14:26:08,985 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 14:26:08,986 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 14:26:08,987 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 14:26:08,988 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1470ea-1ed4-4107-a790-9bc73094447a/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 14:26:09,021 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 14:26:09,022 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 14:26:09,023 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 14:26:09,023 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 14:26:09,024 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 14:26:09,025 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 14:26:09,025 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 14:26:09,025 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 14:26:09,025 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 14:26:09,026 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 14:26:09,027 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 14:26:09,027 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 14:26:09,027 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 14:26:09,028 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 14:26:09,028 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 14:26:09,028 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 14:26:09,028 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 14:26:09,029 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 14:26:09,030 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 14:26:09,030 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 14:26:09,030 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 14:26:09,031 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 14:26:09,031 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 14:26:09,031 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 14:26:09,031 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 14:26:09,031 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 14:26:09,032 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 14:26:09,032 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 14:26:09,032 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 14:26:09,032 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 14:26:09,033 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 14:26:09,033 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 14:26:09,033 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:26:09,034 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 14:26:09,034 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 14:26:09,034 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 14:26:09,034 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 14:26:09,035 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 14:26:09,035 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 14:26:09,035 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 14:26:09,035 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 14:26:09,035 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_2b1470ea-1ed4-4107-a790-9bc73094447a/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1470ea-1ed4-4107-a790-9bc73094447a/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 68864d90c2581c7e2b9a72172352bcf9279d03107788434bd4ac5af6cc5db51a [2022-11-23 14:26:09,325 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 14:26:09,362 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 14:26:09,365 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 14:26:09,367 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 14:26:09,367 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 14:26:09,369 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1470ea-1ed4-4107-a790-9bc73094447a/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/product-lines/elevator_spec9_product25.cil.c [2022-11-23 14:26:12,428 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 14:26:12,882 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 14:26:12,883 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1470ea-1ed4-4107-a790-9bc73094447a/sv-benchmarks/c/product-lines/elevator_spec9_product25.cil.c [2022-11-23 14:26:12,931 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1470ea-1ed4-4107-a790-9bc73094447a/bin/utaipan-Q6hlc19bkW/data/c3a91a1ed/5b2ca0bd66c542ccba2853ee24a8deb9/FLAGefd5a9dba [2022-11-23 14:26:12,949 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1470ea-1ed4-4107-a790-9bc73094447a/bin/utaipan-Q6hlc19bkW/data/c3a91a1ed/5b2ca0bd66c542ccba2853ee24a8deb9 [2022-11-23 14:26:12,955 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 14:26:12,958 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 14:26:12,963 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 14:26:12,964 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 14:26:12,967 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 14:26:12,968 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:26:12" (1/1) ... [2022-11-23 14:26:12,971 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f6319eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:26:12, skipping insertion in model container [2022-11-23 14:26:12,971 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:26:12" (1/1) ... [2022-11-23 14:26:12,979 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 14:26:13,060 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 14:26:13,512 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_2b1470ea-1ed4-4107-a790-9bc73094447a/sv-benchmarks/c/product-lines/elevator_spec9_product25.cil.c[23488,23501] [2022-11-23 14:26:13,647 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:26:13,660 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 14:26:13,721 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_2b1470ea-1ed4-4107-a790-9bc73094447a/sv-benchmarks/c/product-lines/elevator_spec9_product25.cil.c[23488,23501] [2022-11-23 14:26:13,782 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:26:13,808 INFO L208 MainTranslator]: Completed translation [2022-11-23 14:26:13,809 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:26:13 WrapperNode [2022-11-23 14:26:13,809 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 14:26:13,810 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 14:26:13,810 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 14:26:13,810 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 14:26:13,819 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:26:13" (1/1) ... [2022-11-23 14:26:13,863 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:26:13" (1/1) ... [2022-11-23 14:26:13,939 INFO L138 Inliner]: procedures = 91, calls = 331, calls flagged for inlining = 27, calls inlined = 24, statements flattened = 805 [2022-11-23 14:26:13,945 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 14:26:13,946 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 14:26:13,946 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 14:26:13,946 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 14:26:13,958 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:26:13" (1/1) ... [2022-11-23 14:26:13,959 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:26:13" (1/1) ... [2022-11-23 14:26:13,972 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:26:13" (1/1) ... [2022-11-23 14:26:13,983 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:26:13" (1/1) ... [2022-11-23 14:26:14,011 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:26:13" (1/1) ... [2022-11-23 14:26:14,048 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:26:13" (1/1) ... [2022-11-23 14:26:14,053 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:26:13" (1/1) ... [2022-11-23 14:26:14,071 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:26:13" (1/1) ... [2022-11-23 14:26:14,120 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 14:26:14,121 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 14:26:14,121 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 14:26:14,121 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 14:26:14,122 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:26:13" (1/1) ... [2022-11-23 14:26:14,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:26:14,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1470ea-1ed4-4107-a790-9bc73094447a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:26:14,206 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1470ea-1ed4-4107-a790-9bc73094447a/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 14:26:14,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1470ea-1ed4-4107-a790-9bc73094447a/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 14:26:14,263 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 14:26:14,263 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-11-23 14:26:14,263 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-11-23 14:26:14,264 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-11-23 14:26:14,264 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-11-23 14:26:14,264 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-23 14:26:14,264 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-23 14:26:14,264 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-23 14:26:14,265 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-23 14:26:14,265 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-23 14:26:14,265 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-23 14:26:14,265 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-23 14:26:14,265 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-23 14:26:14,266 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-23 14:26:14,266 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-23 14:26:14,266 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-11-23 14:26:14,266 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-11-23 14:26:14,266 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-23 14:26:14,267 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-23 14:26:14,267 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-23 14:26:14,267 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-23 14:26:14,268 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-23 14:26:14,268 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-23 14:26:14,269 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-23 14:26:14,269 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-23 14:26:14,270 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-23 14:26:14,270 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-23 14:26:14,271 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-23 14:26:14,271 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-23 14:26:14,271 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-23 14:26:14,273 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-23 14:26:14,273 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-23 14:26:14,274 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-23 14:26:14,274 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2022-11-23 14:26:14,274 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2022-11-23 14:26:14,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 14:26:14,275 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-23 14:26:14,275 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-23 14:26:14,275 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-23 14:26:14,275 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-23 14:26:14,275 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-23 14:26:14,276 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-23 14:26:14,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 14:26:14,276 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 14:26:14,276 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-23 14:26:14,277 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-23 14:26:14,525 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 14:26:14,542 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 14:26:16,021 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 14:26:16,933 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 14:26:16,934 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-23 14:26:16,939 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:26:16 BoogieIcfgContainer [2022-11-23 14:26:16,939 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 14:26:16,942 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 14:26:16,942 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 14:26:16,946 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 14:26:16,946 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:26:12" (1/3) ... [2022-11-23 14:26:16,948 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@560c4e61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:26:16, skipping insertion in model container [2022-11-23 14:26:16,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:26:13" (2/3) ... [2022-11-23 14:26:16,950 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@560c4e61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:26:16, skipping insertion in model container [2022-11-23 14:26:16,950 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:26:16" (3/3) ... [2022-11-23 14:26:16,952 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec9_product25.cil.c [2022-11-23 14:26:16,974 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 14:26:16,974 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 14:26:17,064 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 14:26:17,074 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;@6aaa1237, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 14:26:17,075 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 14:26:17,082 INFO L276 IsEmpty]: Start isEmpty. Operand has 338 states, 230 states have (on average 1.6217391304347826) internal successors, (373), 251 states have internal predecessors, (373), 85 states have call successors, (85), 21 states have call predecessors, (85), 21 states have return successors, (85), 79 states have call predecessors, (85), 85 states have call successors, (85) [2022-11-23 14:26:17,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-23 14:26:17,111 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:26:17,112 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] [2022-11-23 14:26:17,113 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:26:17,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:26:17,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1116336334, now seen corresponding path program 1 times [2022-11-23 14:26:17,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:26:17,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116067977] [2022-11-23 14:26:17,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:26:17,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:26:17,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:26:17,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:26:17,666 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:26:17,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116067977] [2022-11-23 14:26:17,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116067977] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:26:17,669 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:26:17,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:26:17,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883670857] [2022-11-23 14:26:17,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:26:17,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-23 14:26:17,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:26:17,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-23 14:26:17,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-23 14:26:17,738 INFO L87 Difference]: Start difference. First operand has 338 states, 230 states have (on average 1.6217391304347826) internal successors, (373), 251 states have internal predecessors, (373), 85 states have call successors, (85), 21 states have call predecessors, (85), 21 states have return successors, (85), 79 states have call predecessors, (85), 85 states have call successors, (85) Second operand has 2 states, 2 states have (on average 16.0) internal successors, (32), 2 states have internal predecessors, (32), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2022-11-23 14:26:18,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:26:18,012 INFO L93 Difference]: Finished difference Result 356 states and 570 transitions. [2022-11-23 14:26:18,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-23 14:26:18,015 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 16.0) internal successors, (32), 2 states have internal predecessors, (32), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) Word has length 51 [2022-11-23 14:26:18,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:26:18,039 INFO L225 Difference]: With dead ends: 356 [2022-11-23 14:26:18,039 INFO L226 Difference]: Without dead ends: 334 [2022-11-23 14:26:18,044 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-23 14:26:18,048 INFO L413 NwaCegarLoop]: 499 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:26:18,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 499 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:26:18,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2022-11-23 14:26:18,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 334. [2022-11-23 14:26:18,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 228 states have (on average 1.6096491228070176) internal successors, (367), 247 states have internal predecessors, (367), 85 states have call successors, (85), 21 states have call predecessors, (85), 20 states have return successors, (80), 78 states have call predecessors, (80), 80 states have call successors, (80) [2022-11-23 14:26:18,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 532 transitions. [2022-11-23 14:26:18,160 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 532 transitions. Word has length 51 [2022-11-23 14:26:18,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:26:18,165 INFO L495 AbstractCegarLoop]: Abstraction has 334 states and 532 transitions. [2022-11-23 14:26:18,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 16.0) internal successors, (32), 2 states have internal predecessors, (32), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2022-11-23 14:26:18,166 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 532 transitions. [2022-11-23 14:26:18,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-23 14:26:18,170 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:26:18,170 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] [2022-11-23 14:26:18,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 14:26:18,171 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:26:18,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:26:18,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1772609343, now seen corresponding path program 1 times [2022-11-23 14:26:18,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:26:18,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059860594] [2022-11-23 14:26:18,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:26:18,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:26:18,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:26:18,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:26:18,575 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:26:18,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059860594] [2022-11-23 14:26:18,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059860594] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:26:18,576 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:26:18,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-23 14:26:18,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317086485] [2022-11-23 14:26:18,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:26:18,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 14:26:18,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:26:18,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 14:26:18,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:26:18,580 INFO L87 Difference]: Start difference. First operand 334 states and 532 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 5 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2022-11-23 14:26:21,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:26:21,681 INFO L93 Difference]: Finished difference Result 1111 states and 1803 transitions. [2022-11-23 14:26:21,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-23 14:26:21,682 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 5 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 52 [2022-11-23 14:26:21,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:26:21,689 INFO L225 Difference]: With dead ends: 1111 [2022-11-23 14:26:21,689 INFO L226 Difference]: Without dead ends: 793 [2022-11-23 14:26:21,693 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2022-11-23 14:26:21,695 INFO L413 NwaCegarLoop]: 323 mSDtfsCounter, 1589 mSDsluCounter, 1094 mSDsCounter, 0 mSdLazyCounter, 2415 mSolverCounterSat, 490 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1644 SdHoareTripleChecker+Valid, 1417 SdHoareTripleChecker+Invalid, 2905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 490 IncrementalHoareTripleChecker+Valid, 2415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-23 14:26:21,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1644 Valid, 1417 Invalid, 2905 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [490 Valid, 2415 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-11-23 14:26:21,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2022-11-23 14:26:21,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 755. [2022-11-23 14:26:21,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755 states, 536 states have (on average 1.6399253731343284) internal successors, (879), 571 states have internal predecessors, (879), 175 states have call successors, (175), 41 states have call predecessors, (175), 43 states have return successors, (176), 167 states have call predecessors, (176), 170 states have call successors, (176) [2022-11-23 14:26:21,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 1230 transitions. [2022-11-23 14:26:21,794 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 1230 transitions. Word has length 52 [2022-11-23 14:26:21,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:26:21,794 INFO L495 AbstractCegarLoop]: Abstraction has 755 states and 1230 transitions. [2022-11-23 14:26:21,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 5 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2022-11-23 14:26:21,795 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 1230 transitions. [2022-11-23 14:26:21,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-23 14:26:21,802 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:26:21,802 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:26:21,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 14:26:21,803 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:26:21,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:26:21,814 INFO L85 PathProgramCache]: Analyzing trace with hash -292034412, now seen corresponding path program 1 times [2022-11-23 14:26:21,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:26:21,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529215896] [2022-11-23 14:26:21,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:26:21,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:26:21,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:26:22,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:26:22,150 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:26:22,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529215896] [2022-11-23 14:26:22,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529215896] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:26:22,151 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:26:22,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 14:26:22,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020174455] [2022-11-23 14:26:22,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:26:22,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:26:22,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:26:22,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:26:22,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:26:22,153 INFO L87 Difference]: Start difference. First operand 755 states and 1230 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-23 14:26:22,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:26:22,409 INFO L93 Difference]: Finished difference Result 1249 states and 2039 transitions. [2022-11-23 14:26:22,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 14:26:22,410 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 56 [2022-11-23 14:26:22,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:26:22,417 INFO L225 Difference]: With dead ends: 1249 [2022-11-23 14:26:22,418 INFO L226 Difference]: Without dead ends: 803 [2022-11-23 14:26:22,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:26:22,422 INFO L413 NwaCegarLoop]: 519 mSDtfsCounter, 30 mSDsluCounter, 1502 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 2021 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:26:22,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 2021 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:26:22,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 803 states. [2022-11-23 14:26:22,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 803 to 767. [2022-11-23 14:26:22,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 767 states, 545 states have (on average 1.6293577981651377) internal successors, (888), 580 states have internal predecessors, (888), 175 states have call successors, (175), 41 states have call predecessors, (175), 46 states have return successors, (182), 170 states have call predecessors, (182), 170 states have call successors, (182) [2022-11-23 14:26:22,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 767 states to 767 states and 1245 transitions. [2022-11-23 14:26:22,491 INFO L78 Accepts]: Start accepts. Automaton has 767 states and 1245 transitions. Word has length 56 [2022-11-23 14:26:22,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:26:22,494 INFO L495 AbstractCegarLoop]: Abstraction has 767 states and 1245 transitions. [2022-11-23 14:26:22,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-23 14:26:22,495 INFO L276 IsEmpty]: Start isEmpty. Operand 767 states and 1245 transitions. [2022-11-23 14:26:22,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-23 14:26:22,498 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:26:22,498 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] [2022-11-23 14:26:22,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 14:26:22,499 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:26:22,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:26:22,499 INFO L85 PathProgramCache]: Analyzing trace with hash 323491644, now seen corresponding path program 1 times [2022-11-23 14:26:22,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:26:22,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835935499] [2022-11-23 14:26:22,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:26:22,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:26:22,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:26:22,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:26:22,930 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:26:22,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835935499] [2022-11-23 14:26:22,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835935499] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:26:22,930 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:26:22,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-23 14:26:22,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668515832] [2022-11-23 14:26:22,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:26:22,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 14:26:22,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:26:22,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 14:26:22,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-23 14:26:22,933 INFO L87 Difference]: Start difference. First operand 767 states and 1245 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 7 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2022-11-23 14:26:25,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:26:25,384 INFO L93 Difference]: Finished difference Result 1713 states and 2771 transitions. [2022-11-23 14:26:25,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 14:26:25,385 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 7 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) Word has length 60 [2022-11-23 14:26:25,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:26:25,394 INFO L225 Difference]: With dead ends: 1713 [2022-11-23 14:26:25,395 INFO L226 Difference]: Without dead ends: 1159 [2022-11-23 14:26:25,398 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-23 14:26:25,409 INFO L413 NwaCegarLoop]: 423 mSDtfsCounter, 2050 mSDsluCounter, 596 mSDsCounter, 0 mSdLazyCounter, 2019 mSolverCounterSat, 854 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2182 SdHoareTripleChecker+Valid, 1019 SdHoareTripleChecker+Invalid, 2873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 854 IncrementalHoareTripleChecker+Valid, 2019 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:26:25,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2182 Valid, 1019 Invalid, 2873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [854 Valid, 2019 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-23 14:26:25,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1159 states. [2022-11-23 14:26:25,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1159 to 1087. [2022-11-23 14:26:25,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1087 states, 761 states have (on average 1.5821287779237845) internal successors, (1204), 813 states have internal predecessors, (1204), 252 states have call successors, (252), 65 states have call predecessors, (252), 73 states have return successors, (268), 245 states have call predecessors, (268), 247 states have call successors, (268) [2022-11-23 14:26:25,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1087 states to 1087 states and 1724 transitions. [2022-11-23 14:26:25,584 INFO L78 Accepts]: Start accepts. Automaton has 1087 states and 1724 transitions. Word has length 60 [2022-11-23 14:26:25,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:26:25,585 INFO L495 AbstractCegarLoop]: Abstraction has 1087 states and 1724 transitions. [2022-11-23 14:26:25,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 7 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2022-11-23 14:26:25,585 INFO L276 IsEmpty]: Start isEmpty. Operand 1087 states and 1724 transitions. [2022-11-23 14:26:25,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-23 14:26:25,589 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:26:25,595 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] [2022-11-23 14:26:25,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 14:26:25,597 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:26:25,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:26:25,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1760328155, now seen corresponding path program 1 times [2022-11-23 14:26:25,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:26:25,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485077258] [2022-11-23 14:26:25,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:26:25,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:26:25,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:26:25,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:26:25,793 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:26:25,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485077258] [2022-11-23 14:26:25,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485077258] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:26:25,793 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:26:25,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 14:26:25,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341919486] [2022-11-23 14:26:25,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:26:25,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:26:25,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:26:25,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:26:25,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:26:25,795 INFO L87 Difference]: Start difference. First operand 1087 states and 1724 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-23 14:26:26,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:26:26,080 INFO L93 Difference]: Finished difference Result 2105 states and 3396 transitions. [2022-11-23 14:26:26,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 14:26:26,081 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 63 [2022-11-23 14:26:26,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:26:26,089 INFO L225 Difference]: With dead ends: 2105 [2022-11-23 14:26:26,090 INFO L226 Difference]: Without dead ends: 1087 [2022-11-23 14:26:26,095 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:26:26,096 INFO L413 NwaCegarLoop]: 522 mSDtfsCounter, 210 mSDsluCounter, 816 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 1338 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:26:26,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 1338 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:26:26,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1087 states. [2022-11-23 14:26:26,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1087 to 1087. [2022-11-23 14:26:26,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1087 states, 761 states have (on average 1.540078843626807) internal successors, (1172), 813 states have internal predecessors, (1172), 252 states have call successors, (252), 65 states have call predecessors, (252), 73 states have return successors, (268), 245 states have call predecessors, (268), 247 states have call successors, (268) [2022-11-23 14:26:26,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1087 states to 1087 states and 1692 transitions. [2022-11-23 14:26:26,209 INFO L78 Accepts]: Start accepts. Automaton has 1087 states and 1692 transitions. Word has length 63 [2022-11-23 14:26:26,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:26:26,210 INFO L495 AbstractCegarLoop]: Abstraction has 1087 states and 1692 transitions. [2022-11-23 14:26:26,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-23 14:26:26,210 INFO L276 IsEmpty]: Start isEmpty. Operand 1087 states and 1692 transitions. [2022-11-23 14:26:26,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-23 14:26:26,212 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:26:26,212 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-23 14:26:26,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 14:26:26,212 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:26:26,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:26:26,213 INFO L85 PathProgramCache]: Analyzing trace with hash -670883309, now seen corresponding path program 1 times [2022-11-23 14:26:26,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:26:26,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461825456] [2022-11-23 14:26:26,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:26:26,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:26:26,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:26:26,562 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 14:26:26,563 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:26:26,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461825456] [2022-11-23 14:26:26,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461825456] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:26:26,563 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:26:26,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-23 14:26:26,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259048388] [2022-11-23 14:26:26,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:26:26,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 14:26:26,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:26:26,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 14:26:26,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:26:26,566 INFO L87 Difference]: Start difference. First operand 1087 states and 1692 transitions. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 5 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2022-11-23 14:26:28,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:26:28,582 INFO L93 Difference]: Finished difference Result 2037 states and 3179 transitions. [2022-11-23 14:26:28,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 14:26:28,583 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 5 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 65 [2022-11-23 14:26:28,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:26:28,591 INFO L225 Difference]: With dead ends: 2037 [2022-11-23 14:26:28,591 INFO L226 Difference]: Without dead ends: 1220 [2022-11-23 14:26:28,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-23 14:26:28,596 INFO L413 NwaCegarLoop]: 300 mSDtfsCounter, 880 mSDsluCounter, 976 mSDsCounter, 0 mSdLazyCounter, 2208 mSolverCounterSat, 354 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 942 SdHoareTripleChecker+Valid, 1276 SdHoareTripleChecker+Invalid, 2562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 354 IncrementalHoareTripleChecker+Valid, 2208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-23 14:26:28,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [942 Valid, 1276 Invalid, 2562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [354 Valid, 2208 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-23 14:26:28,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1220 states. [2022-11-23 14:26:28,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1220 to 1114. [2022-11-23 14:26:28,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1114 states, 779 states have (on average 1.532734274711168) internal successors, (1194), 835 states have internal predecessors, (1194), 253 states have call successors, (253), 70 states have call predecessors, (253), 81 states have return successors, (279), 245 states have call predecessors, (279), 248 states have call successors, (279) [2022-11-23 14:26:28,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1114 states to 1114 states and 1726 transitions. [2022-11-23 14:26:28,676 INFO L78 Accepts]: Start accepts. Automaton has 1114 states and 1726 transitions. Word has length 65 [2022-11-23 14:26:28,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:26:28,676 INFO L495 AbstractCegarLoop]: Abstraction has 1114 states and 1726 transitions. [2022-11-23 14:26:28,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 5 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2022-11-23 14:26:28,677 INFO L276 IsEmpty]: Start isEmpty. Operand 1114 states and 1726 transitions. [2022-11-23 14:26:28,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-23 14:26:28,678 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:26:28,679 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] [2022-11-23 14:26:28,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 14:26:28,679 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:26:28,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:26:28,680 INFO L85 PathProgramCache]: Analyzing trace with hash 433843279, now seen corresponding path program 1 times [2022-11-23 14:26:28,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:26:28,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168221205] [2022-11-23 14:26:28,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:26:28,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:26:28,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:26:28,946 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 14:26:28,947 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:26:28,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168221205] [2022-11-23 14:26:28,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168221205] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:26:28,947 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:26:28,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-23 14:26:28,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230596587] [2022-11-23 14:26:28,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:26:28,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 14:26:28,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:26:28,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 14:26:28,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:26:28,949 INFO L87 Difference]: Start difference. First operand 1114 states and 1726 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-23 14:26:29,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:26:29,486 INFO L93 Difference]: Finished difference Result 1186 states and 1839 transitions. [2022-11-23 14:26:29,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 14:26:29,487 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) Word has length 69 [2022-11-23 14:26:29,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:26:29,495 INFO L225 Difference]: With dead ends: 1186 [2022-11-23 14:26:29,496 INFO L226 Difference]: Without dead ends: 1171 [2022-11-23 14:26:29,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-23 14:26:29,498 INFO L413 NwaCegarLoop]: 485 mSDtfsCounter, 616 mSDsluCounter, 802 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 617 SdHoareTripleChecker+Valid, 1287 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 14:26:29,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [617 Valid, 1287 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 14:26:29,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1171 states. [2022-11-23 14:26:29,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1171 to 1118. [2022-11-23 14:26:29,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1118 states, 783 states have (on average 1.5300127713920817) internal successors, (1198), 839 states have internal predecessors, (1198), 253 states have call successors, (253), 70 states have call predecessors, (253), 81 states have return successors, (279), 245 states have call predecessors, (279), 248 states have call successors, (279) [2022-11-23 14:26:29,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1118 states to 1118 states and 1730 transitions. [2022-11-23 14:26:29,591 INFO L78 Accepts]: Start accepts. Automaton has 1118 states and 1730 transitions. Word has length 69 [2022-11-23 14:26:29,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:26:29,594 INFO L495 AbstractCegarLoop]: Abstraction has 1118 states and 1730 transitions. [2022-11-23 14:26:29,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-23 14:26:29,595 INFO L276 IsEmpty]: Start isEmpty. Operand 1118 states and 1730 transitions. [2022-11-23 14:26:29,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-23 14:26:29,596 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:26:29,596 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] [2022-11-23 14:26:29,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-23 14:26:29,597 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:26:29,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:26:29,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1208809672, now seen corresponding path program 1 times [2022-11-23 14:26:29,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:26:29,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759290392] [2022-11-23 14:26:29,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:26:29,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:26:29,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:26:29,958 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 14:26:29,958 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:26:29,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759290392] [2022-11-23 14:26:29,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759290392] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:26:29,959 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:26:29,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-23 14:26:29,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562465154] [2022-11-23 14:26:29,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:26:29,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 14:26:29,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:26:29,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 14:26:29,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:26:29,961 INFO L87 Difference]: Start difference. First operand 1118 states and 1730 transitions. Second operand has 7 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 4 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 5 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-23 14:26:30,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:26:30,317 INFO L93 Difference]: Finished difference Result 1137 states and 1754 transitions. [2022-11-23 14:26:30,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 14:26:30,317 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 4 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 5 states have call predecessors, (13), 3 states have call successors, (13) Word has length 74 [2022-11-23 14:26:30,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:26:30,325 INFO L225 Difference]: With dead ends: 1137 [2022-11-23 14:26:30,325 INFO L226 Difference]: Without dead ends: 1122 [2022-11-23 14:26:30,326 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-23 14:26:30,327 INFO L413 NwaCegarLoop]: 475 mSDtfsCounter, 257 mSDsluCounter, 2099 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 2574 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:26:30,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 2574 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:26:30,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1122 states. [2022-11-23 14:26:30,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1122 to 1118. [2022-11-23 14:26:30,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1118 states, 783 states have (on average 1.5261813537675606) internal successors, (1195), 839 states have internal predecessors, (1195), 253 states have call successors, (253), 70 states have call predecessors, (253), 81 states have return successors, (279), 245 states have call predecessors, (279), 248 states have call successors, (279) [2022-11-23 14:26:30,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1118 states to 1118 states and 1727 transitions. [2022-11-23 14:26:30,430 INFO L78 Accepts]: Start accepts. Automaton has 1118 states and 1727 transitions. Word has length 74 [2022-11-23 14:26:30,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:26:30,431 INFO L495 AbstractCegarLoop]: Abstraction has 1118 states and 1727 transitions. [2022-11-23 14:26:30,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 4 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 5 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-23 14:26:30,431 INFO L276 IsEmpty]: Start isEmpty. Operand 1118 states and 1727 transitions. [2022-11-23 14:26:30,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-23 14:26:30,439 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:26:30,439 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-23 14:26:30,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-23 14:26:30,440 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:26:30,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:26:30,440 INFO L85 PathProgramCache]: Analyzing trace with hash -687954906, now seen corresponding path program 1 times [2022-11-23 14:26:30,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:26:30,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225797043] [2022-11-23 14:26:30,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:26:30,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:26:30,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:26:30,573 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-23 14:26:30,574 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:26:30,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225797043] [2022-11-23 14:26:30,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225797043] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:26:30,574 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:26:30,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:26:30,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502754306] [2022-11-23 14:26:30,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:26:30,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:26:30,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:26:30,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:26:30,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:26:30,577 INFO L87 Difference]: Start difference. First operand 1118 states and 1727 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-23 14:26:30,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:26:30,892 INFO L93 Difference]: Finished difference Result 3277 states and 5104 transitions. [2022-11-23 14:26:30,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:26:30,892 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 81 [2022-11-23 14:26:30,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:26:30,914 INFO L225 Difference]: With dead ends: 3277 [2022-11-23 14:26:30,914 INFO L226 Difference]: Without dead ends: 2175 [2022-11-23 14:26:30,920 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 [2022-11-23 14:26:30,923 INFO L413 NwaCegarLoop]: 593 mSDtfsCounter, 477 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 477 SdHoareTripleChecker+Valid, 1058 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:26:30,923 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [477 Valid, 1058 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:26:30,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2175 states. [2022-11-23 14:26:31,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2175 to 2134. [2022-11-23 14:26:31,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2134 states, 1523 states have (on average 1.5344714379514117) internal successors, (2337), 1631 states have internal predecessors, (2337), 457 states have call successors, (457), 129 states have call predecessors, (457), 153 states have return successors, (526), 429 states have call predecessors, (526), 452 states have call successors, (526) [2022-11-23 14:26:31,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2134 states to 2134 states and 3320 transitions. [2022-11-23 14:26:31,135 INFO L78 Accepts]: Start accepts. Automaton has 2134 states and 3320 transitions. Word has length 81 [2022-11-23 14:26:31,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:26:31,137 INFO L495 AbstractCegarLoop]: Abstraction has 2134 states and 3320 transitions. [2022-11-23 14:26:31,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-23 14:26:31,137 INFO L276 IsEmpty]: Start isEmpty. Operand 2134 states and 3320 transitions. [2022-11-23 14:26:31,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-23 14:26:31,140 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:26:31,140 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-23 14:26:31,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-23 14:26:31,141 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:26:31,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:26:31,141 INFO L85 PathProgramCache]: Analyzing trace with hash 147821623, now seen corresponding path program 1 times [2022-11-23 14:26:31,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:26:31,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967541308] [2022-11-23 14:26:31,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:26:31,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:26:31,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:26:31,322 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-23 14:26:31,322 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:26:31,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967541308] [2022-11-23 14:26:31,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967541308] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:26:31,323 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:26:31,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:26:31,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605173271] [2022-11-23 14:26:31,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:26:31,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:26:31,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:26:31,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:26:31,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:26:31,326 INFO L87 Difference]: Start difference. First operand 2134 states and 3320 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-23 14:26:31,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:26:31,792 INFO L93 Difference]: Finished difference Result 6324 states and 9926 transitions. [2022-11-23 14:26:31,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:26:31,793 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 82 [2022-11-23 14:26:31,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:26:31,827 INFO L225 Difference]: With dead ends: 6324 [2022-11-23 14:26:31,827 INFO L226 Difference]: Without dead ends: 4209 [2022-11-23 14:26:31,838 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 [2022-11-23 14:26:31,839 INFO L413 NwaCegarLoop]: 596 mSDtfsCounter, 476 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 476 SdHoareTripleChecker+Valid, 1064 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:26:31,840 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [476 Valid, 1064 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:26:31,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4209 states. [2022-11-23 14:26:32,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4209 to 4167. [2022-11-23 14:26:32,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4167 states, 3004 states have (on average 1.5369507323568574) internal successors, (4617), 3216 states have internal predecessors, (4617), 865 states have call successors, (865), 247 states have call predecessors, (865), 297 states have return successors, (1048), 797 states have call predecessors, (1048), 860 states have call successors, (1048) [2022-11-23 14:26:32,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4167 states to 4167 states and 6530 transitions. [2022-11-23 14:26:32,250 INFO L78 Accepts]: Start accepts. Automaton has 4167 states and 6530 transitions. Word has length 82 [2022-11-23 14:26:32,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:26:32,251 INFO L495 AbstractCegarLoop]: Abstraction has 4167 states and 6530 transitions. [2022-11-23 14:26:32,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-23 14:26:32,251 INFO L276 IsEmpty]: Start isEmpty. Operand 4167 states and 6530 transitions. [2022-11-23 14:26:32,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-23 14:26:32,255 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:26:32,255 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-23 14:26:32,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-23 14:26:32,255 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:26:32,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:26:32,257 INFO L85 PathProgramCache]: Analyzing trace with hash -413319349, now seen corresponding path program 1 times [2022-11-23 14:26:32,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:26:32,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898038773] [2022-11-23 14:26:32,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:26:32,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:26:32,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:26:32,379 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-23 14:26:32,379 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:26:32,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898038773] [2022-11-23 14:26:32,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898038773] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:26:32,380 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:26:32,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:26:32,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051331923] [2022-11-23 14:26:32,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:26:32,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:26:32,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:26:32,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:26:32,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:26:32,382 INFO L87 Difference]: Start difference. First operand 4167 states and 6530 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-23 14:26:33,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:26:33,246 INFO L93 Difference]: Finished difference Result 12419 states and 19701 transitions. [2022-11-23 14:26:33,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:26:33,247 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 86 [2022-11-23 14:26:33,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:26:33,314 INFO L225 Difference]: With dead ends: 12419 [2022-11-23 14:26:33,314 INFO L226 Difference]: Without dead ends: 8277 [2022-11-23 14:26:33,338 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 [2022-11-23 14:26:33,339 INFO L413 NwaCegarLoop]: 599 mSDtfsCounter, 475 mSDsluCounter, 471 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 475 SdHoareTripleChecker+Valid, 1070 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:26:33,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [475 Valid, 1070 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:26:33,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8277 states. [2022-11-23 14:26:34,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8277 to 8234. [2022-11-23 14:26:34,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8234 states, 5967 states have (on average 1.5362828892240656) internal successors, (9167), 6387 states have internal predecessors, (9167), 1681 states have call successors, (1681), 483 states have call predecessors, (1681), 585 states have return successors, (2194), 1533 states have call predecessors, (2194), 1676 states have call successors, (2194) [2022-11-23 14:26:34,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8234 states to 8234 states and 13042 transitions. [2022-11-23 14:26:34,117 INFO L78 Accepts]: Start accepts. Automaton has 8234 states and 13042 transitions. Word has length 86 [2022-11-23 14:26:34,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:26:34,118 INFO L495 AbstractCegarLoop]: Abstraction has 8234 states and 13042 transitions. [2022-11-23 14:26:34,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-23 14:26:34,119 INFO L276 IsEmpty]: Start isEmpty. Operand 8234 states and 13042 transitions. [2022-11-23 14:26:34,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-23 14:26:34,122 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:26:34,122 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-23 14:26:34,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-23 14:26:34,123 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:26:34,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:26:34,123 INFO L85 PathProgramCache]: Analyzing trace with hash 309579161, now seen corresponding path program 1 times [2022-11-23 14:26:34,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:26:34,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729003457] [2022-11-23 14:26:34,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:26:34,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:26:34,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:26:34,285 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-23 14:26:34,285 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:26:34,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729003457] [2022-11-23 14:26:34,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729003457] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:26:34,286 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:26:34,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:26:34,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229862796] [2022-11-23 14:26:34,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:26:34,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:26:34,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:26:34,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:26:34,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:26:34,288 INFO L87 Difference]: Start difference. First operand 8234 states and 13042 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-23 14:26:35,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:26:35,953 INFO L93 Difference]: Finished difference Result 24610 states and 39746 transitions. [2022-11-23 14:26:35,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:26:35,954 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 84 [2022-11-23 14:26:35,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:26:36,159 INFO L225 Difference]: With dead ends: 24610 [2022-11-23 14:26:36,159 INFO L226 Difference]: Without dead ends: 16413 [2022-11-23 14:26:36,210 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 [2022-11-23 14:26:36,211 INFO L413 NwaCegarLoop]: 602 mSDtfsCounter, 474 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 474 SdHoareTripleChecker+Valid, 1076 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:26:36,211 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [474 Valid, 1076 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:26:36,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16413 states. [2022-11-23 14:26:37,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16413 to 16369. [2022-11-23 14:26:37,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16369 states, 11894 states have (on average 1.5339667059021356) internal successors, (18245), 12730 states have internal predecessors, (18245), 3313 states have call successors, (3313), 955 states have call predecessors, (3313), 1161 states have return successors, (4864), 3005 states have call predecessors, (4864), 3308 states have call successors, (4864) [2022-11-23 14:26:37,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16369 states to 16369 states and 26422 transitions. [2022-11-23 14:26:37,912 INFO L78 Accepts]: Start accepts. Automaton has 16369 states and 26422 transitions. Word has length 84 [2022-11-23 14:26:37,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:26:37,913 INFO L495 AbstractCegarLoop]: Abstraction has 16369 states and 26422 transitions. [2022-11-23 14:26:37,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-23 14:26:37,913 INFO L276 IsEmpty]: Start isEmpty. Operand 16369 states and 26422 transitions. [2022-11-23 14:26:37,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-11-23 14:26:37,916 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:26:37,916 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-23 14:26:37,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-23 14:26:37,916 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:26:37,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:26:37,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1006618346, now seen corresponding path program 1 times [2022-11-23 14:26:37,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:26:37,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658674036] [2022-11-23 14:26:37,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:26:37,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:26:37,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:26:38,053 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-23 14:26:38,053 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:26:38,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658674036] [2022-11-23 14:26:38,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658674036] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:26:38,054 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:26:38,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:26:38,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151693935] [2022-11-23 14:26:38,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:26:38,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:26:38,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:26:38,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:26:38,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:26:38,056 INFO L87 Difference]: Start difference. First operand 16369 states and 26422 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-23 14:26:39,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:26:39,457 INFO L93 Difference]: Finished difference Result 17431 states and 28225 transitions. [2022-11-23 14:26:39,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:26:39,458 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 85 [2022-11-23 14:26:39,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:26:39,585 INFO L225 Difference]: With dead ends: 17431 [2022-11-23 14:26:39,586 INFO L226 Difference]: Without dead ends: 17420 [2022-11-23 14:26:39,600 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 [2022-11-23 14:26:39,602 INFO L413 NwaCegarLoop]: 595 mSDtfsCounter, 460 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 460 SdHoareTripleChecker+Valid, 1074 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 [2022-11-23 14:26:39,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [460 Valid, 1074 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:26:39,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17420 states. [2022-11-23 14:26:41,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17420 to 17377. [2022-11-23 14:26:41,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17377 states, 12627 states have (on average 1.5329056783083868) internal successors, (19356), 13515 states have internal predecessors, (19356), 3517 states have call successors, (3517), 1014 states have call predecessors, (3517), 1232 states have return successors, (5275), 3188 states have call predecessors, (5275), 3512 states have call successors, (5275) [2022-11-23 14:26:41,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17377 states to 17377 states and 28148 transitions. [2022-11-23 14:26:41,535 INFO L78 Accepts]: Start accepts. Automaton has 17377 states and 28148 transitions. Word has length 85 [2022-11-23 14:26:41,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:26:41,536 INFO L495 AbstractCegarLoop]: Abstraction has 17377 states and 28148 transitions. [2022-11-23 14:26:41,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-23 14:26:41,536 INFO L276 IsEmpty]: Start isEmpty. Operand 17377 states and 28148 transitions. [2022-11-23 14:26:41,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-11-23 14:26:41,543 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:26:41,543 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 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] [2022-11-23 14:26:41,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-23 14:26:41,543 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:26:41,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:26:41,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1683573582, now seen corresponding path program 1 times [2022-11-23 14:26:41,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:26:41,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389634904] [2022-11-23 14:26:41,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:26:41,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:26:41,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:26:41,733 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-11-23 14:26:41,733 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:26:41,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389634904] [2022-11-23 14:26:41,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389634904] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:26:41,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430463218] [2022-11-23 14:26:41,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:26:41,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:26:41,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1470ea-1ed4-4107-a790-9bc73094447a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:26:41,740 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1470ea-1ed4-4107-a790-9bc73094447a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:26:41,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1470ea-1ed4-4107-a790-9bc73094447a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 14:26:42,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:26:42,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 1825 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 14:26:42,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:26:42,341 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-23 14:26:42,341 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:26:42,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430463218] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:26:42,342 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:26:42,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-23 14:26:42,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825655006] [2022-11-23 14:26:42,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:26:42,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:26:42,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:26:42,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:26:42,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:26:42,345 INFO L87 Difference]: Start difference. First operand 17377 states and 28148 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2022-11-23 14:26:44,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:26:44,207 INFO L93 Difference]: Finished difference Result 36726 states and 61123 transitions. [2022-11-23 14:26:44,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 14:26:44,209 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 132 [2022-11-23 14:26:44,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:26:44,333 INFO L225 Difference]: With dead ends: 36726 [2022-11-23 14:26:44,333 INFO L226 Difference]: Without dead ends: 19366 [2022-11-23 14:26:44,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:26:44,420 INFO L413 NwaCegarLoop]: 419 mSDtfsCounter, 213 mSDsluCounter, 814 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1233 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:26:44,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1233 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 14:26:44,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19366 states. [2022-11-23 14:26:45,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19366 to 19366. [2022-11-23 14:26:45,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19366 states, 14565 states have (on average 1.5845520082389288) internal successors, (23079), 15453 states have internal predecessors, (23079), 3517 states have call successors, (3517), 1065 states have call predecessors, (3517), 1283 states have return successors, (5275), 3188 states have call predecessors, (5275), 3512 states have call successors, (5275) [2022-11-23 14:26:45,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19366 states to 19366 states and 31871 transitions. [2022-11-23 14:26:45,904 INFO L78 Accepts]: Start accepts. Automaton has 19366 states and 31871 transitions. Word has length 132 [2022-11-23 14:26:45,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:26:45,907 INFO L495 AbstractCegarLoop]: Abstraction has 19366 states and 31871 transitions. [2022-11-23 14:26:45,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2022-11-23 14:26:45,907 INFO L276 IsEmpty]: Start isEmpty. Operand 19366 states and 31871 transitions. [2022-11-23 14:26:45,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-23 14:26:45,914 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:26:45,914 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 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] [2022-11-23 14:26:45,934 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1470ea-1ed4-4107-a790-9bc73094447a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 14:26:46,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1470ea-1ed4-4107-a790-9bc73094447a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:26:46,135 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:26:46,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:26:46,135 INFO L85 PathProgramCache]: Analyzing trace with hash 435374254, now seen corresponding path program 1 times [2022-11-23 14:26:46,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:26:46,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399287857] [2022-11-23 14:26:46,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:26:46,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:26:46,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:26:48,084 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-23 14:26:48,084 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:26:48,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399287857] [2022-11-23 14:26:48,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399287857] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:26:48,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587650393] [2022-11-23 14:26:48,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:26:48,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:26:48,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1470ea-1ed4-4107-a790-9bc73094447a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:26:48,087 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1470ea-1ed4-4107-a790-9bc73094447a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:26:48,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1470ea-1ed4-4107-a790-9bc73094447a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 14:26:48,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:26:48,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 1830 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 14:26:48,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:26:48,593 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-23 14:26:48,593 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:26:48,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587650393] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:26:48,599 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:26:48,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [18] total 20 [2022-11-23 14:26:48,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068938531] [2022-11-23 14:26:48,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:26:48,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:26:48,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:26:48,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:26:48,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2022-11-23 14:26:48,605 INFO L87 Difference]: Start difference. First operand 19366 states and 31871 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2022-11-23 14:26:50,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:26:50,156 INFO L93 Difference]: Finished difference Result 40704 states and 68518 transitions. [2022-11-23 14:26:50,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 14:26:50,157 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 137 [2022-11-23 14:26:50,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:26:50,263 INFO L225 Difference]: With dead ends: 40704 [2022-11-23 14:26:50,264 INFO L226 Difference]: Without dead ends: 21355 [2022-11-23 14:26:50,328 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-11-23 14:26:50,328 INFO L413 NwaCegarLoop]: 419 mSDtfsCounter, 211 mSDsluCounter, 814 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1233 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:26:50,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1233 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 14:26:50,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21355 states. [2022-11-23 14:26:51,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21355 to 21355. [2022-11-23 14:26:51,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21355 states, 16503 states have (on average 1.6240683512088712) internal successors, (26802), 17391 states have internal predecessors, (26802), 3517 states have call successors, (3517), 1116 states have call predecessors, (3517), 1334 states have return successors, (5275), 3188 states have call predecessors, (5275), 3512 states have call successors, (5275) [2022-11-23 14:26:51,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21355 states to 21355 states and 35594 transitions. [2022-11-23 14:26:51,958 INFO L78 Accepts]: Start accepts. Automaton has 21355 states and 35594 transitions. Word has length 137 [2022-11-23 14:26:51,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:26:51,961 INFO L495 AbstractCegarLoop]: Abstraction has 21355 states and 35594 transitions. [2022-11-23 14:26:51,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2022-11-23 14:26:51,962 INFO L276 IsEmpty]: Start isEmpty. Operand 21355 states and 35594 transitions. [2022-11-23 14:26:51,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-11-23 14:26:51,973 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:26:51,973 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 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] [2022-11-23 14:26:51,986 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1470ea-1ed4-4107-a790-9bc73094447a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 14:26:52,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1470ea-1ed4-4107-a790-9bc73094447a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-23 14:26:52,188 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:26:52,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:26:52,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1538670462, now seen corresponding path program 1 times [2022-11-23 14:26:52,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:26:52,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510493496] [2022-11-23 14:26:52,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:26:52,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:26:52,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:26:53,734 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-11-23 14:26:53,734 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:26:53,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510493496] [2022-11-23 14:26:53,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510493496] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:26:53,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847379479] [2022-11-23 14:26:53,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:26:53,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:26:53,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1470ea-1ed4-4107-a790-9bc73094447a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:26:53,736 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1470ea-1ed4-4107-a790-9bc73094447a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:26:53,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1470ea-1ed4-4107-a790-9bc73094447a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 14:26:54,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:26:54,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 1834 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 14:26:54,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:26:54,331 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-23 14:26:54,331 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:26:54,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847379479] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:26:54,336 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:26:54,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [18] total 20 [2022-11-23 14:26:54,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835261975] [2022-11-23 14:26:54,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:26:54,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:26:54,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:26:54,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:26:54,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2022-11-23 14:26:54,339 INFO L87 Difference]: Start difference. First operand 21355 states and 35594 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2022-11-23 14:26:55,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:26:55,557 INFO L93 Difference]: Finished difference Result 44682 states and 75913 transitions. [2022-11-23 14:26:55,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 14:26:55,558 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 141 [2022-11-23 14:26:55,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:26:55,658 INFO L225 Difference]: With dead ends: 44682 [2022-11-23 14:26:55,659 INFO L226 Difference]: Without dead ends: 23344 [2022-11-23 14:26:55,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-11-23 14:26:55,724 INFO L413 NwaCegarLoop]: 419 mSDtfsCounter, 209 mSDsluCounter, 814 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1233 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:26:55,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1233 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 14:26:55,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23344 states. [2022-11-23 14:26:57,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23344 to 23344. [2022-11-23 14:26:57,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23344 states, 18441 states have (on average 1.6552789978851472) internal successors, (30525), 19329 states have internal predecessors, (30525), 3517 states have call successors, (3517), 1167 states have call predecessors, (3517), 1385 states have return successors, (5275), 3188 states have call predecessors, (5275), 3512 states have call successors, (5275) [2022-11-23 14:26:57,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23344 states to 23344 states and 39317 transitions. [2022-11-23 14:26:57,623 INFO L78 Accepts]: Start accepts. Automaton has 23344 states and 39317 transitions. Word has length 141 [2022-11-23 14:26:57,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:26:57,624 INFO L495 AbstractCegarLoop]: Abstraction has 23344 states and 39317 transitions. [2022-11-23 14:26:57,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2022-11-23 14:26:57,624 INFO L276 IsEmpty]: Start isEmpty. Operand 23344 states and 39317 transitions. [2022-11-23 14:26:57,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-11-23 14:26:57,631 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:26:57,631 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 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] [2022-11-23 14:26:57,640 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1470ea-1ed4-4107-a790-9bc73094447a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 14:26:57,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1470ea-1ed4-4107-a790-9bc73094447a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-23 14:26:57,840 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:26:57,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:26:57,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1333081480, now seen corresponding path program 1 times [2022-11-23 14:26:57,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:26:57,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039024977] [2022-11-23 14:26:57,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:26:57,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:26:57,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:26:59,195 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-11-23 14:26:59,195 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:26:59,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039024977] [2022-11-23 14:26:59,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039024977] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:26:59,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309343292] [2022-11-23 14:26:59,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:26:59,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:26:59,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1470ea-1ed4-4107-a790-9bc73094447a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:26:59,200 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1470ea-1ed4-4107-a790-9bc73094447a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:26:59,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1470ea-1ed4-4107-a790-9bc73094447a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 14:26:59,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:26:59,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 1837 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 14:26:59,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:26:59,708 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-23 14:26:59,708 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:26:59,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309343292] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:26:59,709 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:26:59,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [18] total 20 [2022-11-23 14:26:59,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368771424] [2022-11-23 14:26:59,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:26:59,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:26:59,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:26:59,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:26:59,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2022-11-23 14:26:59,711 INFO L87 Difference]: Start difference. First operand 23344 states and 39317 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2022-11-23 14:27:01,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:27:01,329 INFO L93 Difference]: Finished difference Result 48660 states and 83308 transitions. [2022-11-23 14:27:01,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 14:27:01,329 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 144 [2022-11-23 14:27:01,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:27:01,430 INFO L225 Difference]: With dead ends: 48660 [2022-11-23 14:27:01,430 INFO L226 Difference]: Without dead ends: 25333 [2022-11-23 14:27:01,492 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-11-23 14:27:01,493 INFO L413 NwaCegarLoop]: 419 mSDtfsCounter, 207 mSDsluCounter, 814 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1233 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:27:01,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 1233 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:27:01,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25333 states. [2022-11-23 14:27:02,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25333 to 25333. [2022-11-23 14:27:02,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25333 states, 20379 states have (on average 1.680553510967172) internal successors, (34248), 21267 states have internal predecessors, (34248), 3517 states have call successors, (3517), 1218 states have call predecessors, (3517), 1436 states have return successors, (5275), 3188 states have call predecessors, (5275), 3512 states have call successors, (5275) [2022-11-23 14:27:02,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25333 states to 25333 states and 43040 transitions. [2022-11-23 14:27:02,854 INFO L78 Accepts]: Start accepts. Automaton has 25333 states and 43040 transitions. Word has length 144 [2022-11-23 14:27:02,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:27:02,855 INFO L495 AbstractCegarLoop]: Abstraction has 25333 states and 43040 transitions. [2022-11-23 14:27:02,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2022-11-23 14:27:02,856 INFO L276 IsEmpty]: Start isEmpty. Operand 25333 states and 43040 transitions. [2022-11-23 14:27:02,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-11-23 14:27:02,864 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:27:02,864 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 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] [2022-11-23 14:27:02,874 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1470ea-1ed4-4107-a790-9bc73094447a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-23 14:27:03,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1470ea-1ed4-4107-a790-9bc73094447a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:27:03,072 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:27:03,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:27:03,072 INFO L85 PathProgramCache]: Analyzing trace with hash 593862298, now seen corresponding path program 1 times [2022-11-23 14:27:03,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:27:03,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375796508] [2022-11-23 14:27:03,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:27:03,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:27:03,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:27:04,435 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-11-23 14:27:04,435 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:27:04,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375796508] [2022-11-23 14:27:04,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375796508] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:27:04,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335584544] [2022-11-23 14:27:04,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:27:04,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:27:04,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1470ea-1ed4-4107-a790-9bc73094447a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:27:04,437 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1470ea-1ed4-4107-a790-9bc73094447a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:27:04,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1470ea-1ed4-4107-a790-9bc73094447a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 14:27:04,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:27:04,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 1833 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-23 14:27:04,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:27:05,071 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-11-23 14:27:05,071 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:27:05,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335584544] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:27:05,071 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:27:05,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [18] total 20 [2022-11-23 14:27:05,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467508834] [2022-11-23 14:27:05,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:27:05,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:27:05,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:27:05,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:27:05,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-11-23 14:27:05,074 INFO L87 Difference]: Start difference. First operand 25333 states and 43040 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 3 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2022-11-23 14:27:06,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:27:06,678 INFO L93 Difference]: Finished difference Result 52260 states and 89629 transitions. [2022-11-23 14:27:06,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 14:27:06,679 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 3 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) Word has length 146 [2022-11-23 14:27:06,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:27:06,760 INFO L225 Difference]: With dead ends: 52260 [2022-11-23 14:27:06,760 INFO L226 Difference]: Without dead ends: 26989 [2022-11-23 14:27:06,800 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2022-11-23 14:27:06,801 INFO L413 NwaCegarLoop]: 549 mSDtfsCounter, 289 mSDsluCounter, 786 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 1335 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:27:06,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [289 Valid, 1335 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:27:06,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26989 states. [2022-11-23 14:27:08,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26989 to 26835. [2022-11-23 14:27:08,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26835 states, 21453 states have (on average 1.666014077285228) internal successors, (35741), 22344 states have internal predecessors, (35741), 3806 states have call successors, (3806), 1371 states have call predecessors, (3806), 1575 states have return successors, (6702), 3443 states have call predecessors, (6702), 3801 states have call successors, (6702) [2022-11-23 14:27:08,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26835 states to 26835 states and 46249 transitions. [2022-11-23 14:27:08,298 INFO L78 Accepts]: Start accepts. Automaton has 26835 states and 46249 transitions. Word has length 146 [2022-11-23 14:27:08,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:27:08,299 INFO L495 AbstractCegarLoop]: Abstraction has 26835 states and 46249 transitions. [2022-11-23 14:27:08,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 3 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2022-11-23 14:27:08,299 INFO L276 IsEmpty]: Start isEmpty. Operand 26835 states and 46249 transitions. [2022-11-23 14:27:08,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-11-23 14:27:08,308 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:27:08,308 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 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, 1] [2022-11-23 14:27:08,325 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1470ea-1ed4-4107-a790-9bc73094447a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 14:27:08,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1470ea-1ed4-4107-a790-9bc73094447a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-23 14:27:08,517 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:27:08,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:27:08,518 INFO L85 PathProgramCache]: Analyzing trace with hash 453761676, now seen corresponding path program 1 times [2022-11-23 14:27:08,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:27:08,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661638742] [2022-11-23 14:27:08,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:27:08,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:27:08,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:27:09,718 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-11-23 14:27:09,718 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:27:09,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661638742] [2022-11-23 14:27:09,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661638742] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:27:09,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813566996] [2022-11-23 14:27:09,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:27:09,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:27:09,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1470ea-1ed4-4107-a790-9bc73094447a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:27:09,723 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1470ea-1ed4-4107-a790-9bc73094447a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:27:09,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1470ea-1ed4-4107-a790-9bc73094447a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 14:27:10,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:27:10,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 1838 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-23 14:27:10,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:27:10,521 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-11-23 14:27:10,521 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:27:10,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813566996] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:27:10,522 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:27:10,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [18] total 23 [2022-11-23 14:27:10,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121611486] [2022-11-23 14:27:10,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:27:10,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 14:27:10,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:27:10,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 14:27:10,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2022-11-23 14:27:10,524 INFO L87 Difference]: Start difference. First operand 26835 states and 46249 transitions. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 6 states have call successors, (23), 5 states have call predecessors, (23), 4 states have return successors, (22), 6 states have call predecessors, (22), 5 states have call successors, (22) [2022-11-23 14:27:14,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:27:14,859 INFO L93 Difference]: Finished difference Result 63576 states and 111078 transitions. [2022-11-23 14:27:14,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-23 14:27:14,860 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 6 states have call successors, (23), 5 states have call predecessors, (23), 4 states have return successors, (22), 6 states have call predecessors, (22), 5 states have call successors, (22) Word has length 149 [2022-11-23 14:27:14,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:27:15,051 INFO L225 Difference]: With dead ends: 63576 [2022-11-23 14:27:15,052 INFO L226 Difference]: Without dead ends: 36764 [2022-11-23 14:27:15,154 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2022-11-23 14:27:15,154 INFO L413 NwaCegarLoop]: 407 mSDtfsCounter, 1051 mSDsluCounter, 900 mSDsCounter, 0 mSdLazyCounter, 3022 mSolverCounterSat, 441 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1161 SdHoareTripleChecker+Valid, 1307 SdHoareTripleChecker+Invalid, 3463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 441 IncrementalHoareTripleChecker+Valid, 3022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-23 14:27:15,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1161 Valid, 1307 Invalid, 3463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [441 Valid, 3022 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-11-23 14:27:15,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36764 states. [2022-11-23 14:27:17,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36764 to 34500. [2022-11-23 14:27:17,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34500 states, 27677 states have (on average 1.6617769266900315) internal successors, (45993), 28867 states have internal predecessors, (45993), 4742 states have call successors, (4742), 1820 states have call predecessors, (4742), 2080 states have return successors, (7467), 4268 states have call predecessors, (7467), 4737 states have call successors, (7467) [2022-11-23 14:27:17,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34500 states to 34500 states and 58202 transitions. [2022-11-23 14:27:17,266 INFO L78 Accepts]: Start accepts. Automaton has 34500 states and 58202 transitions. Word has length 149 [2022-11-23 14:27:17,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:27:17,267 INFO L495 AbstractCegarLoop]: Abstraction has 34500 states and 58202 transitions. [2022-11-23 14:27:17,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 6 states have call successors, (23), 5 states have call predecessors, (23), 4 states have return successors, (22), 6 states have call predecessors, (22), 5 states have call successors, (22) [2022-11-23 14:27:17,267 INFO L276 IsEmpty]: Start isEmpty. Operand 34500 states and 58202 transitions. [2022-11-23 14:27:17,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-11-23 14:27:17,275 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:27:17,275 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 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, 1] [2022-11-23 14:27:17,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1470ea-1ed4-4107-a790-9bc73094447a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-23 14:27:17,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1470ea-1ed4-4107-a790-9bc73094447a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:27:17,485 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:27:17,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:27:17,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1960668456, now seen corresponding path program 1 times [2022-11-23 14:27:17,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:27:17,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955262405] [2022-11-23 14:27:17,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:27:17,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:27:17,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:27:19,025 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-11-23 14:27:19,026 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:27:19,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955262405] [2022-11-23 14:27:19,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955262405] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:27:19,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659819687] [2022-11-23 14:27:19,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:27:19,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:27:19,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1470ea-1ed4-4107-a790-9bc73094447a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:27:19,028 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1470ea-1ed4-4107-a790-9bc73094447a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:27:19,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1470ea-1ed4-4107-a790-9bc73094447a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 14:27:19,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:27:19,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 1839 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-23 14:27:19,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:27:19,621 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-11-23 14:27:19,622 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:27:19,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659819687] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:27:19,622 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:27:19,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [18] total 20 [2022-11-23 14:27:19,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915839311] [2022-11-23 14:27:19,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:27:19,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:27:19,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:27:19,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:27:19,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-11-23 14:27:19,624 INFO L87 Difference]: Start difference. First operand 34500 states and 58202 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 1 states have call successors, (22) [2022-11-23 14:27:21,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:27:21,065 INFO L93 Difference]: Finished difference Result 35385 states and 61385 transitions. [2022-11-23 14:27:21,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 14:27:21,066 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 1 states have call successors, (22) Word has length 149 [2022-11-23 14:27:21,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:27:21,227 INFO L225 Difference]: With dead ends: 35385 [2022-11-23 14:27:21,227 INFO L226 Difference]: Without dead ends: 35299 [2022-11-23 14:27:21,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2022-11-23 14:27:21,244 INFO L413 NwaCegarLoop]: 521 mSDtfsCounter, 44 mSDsluCounter, 991 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 1512 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:27:21,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 1512 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:27:21,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35299 states. [2022-11-23 14:27:22,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35299 to 34632. [2022-11-23 14:27:23,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34632 states, 27809 states have (on average 1.658635693480528) internal successors, (46125), 28999 states have internal predecessors, (46125), 4742 states have call successors, (4742), 1820 states have call predecessors, (4742), 2080 states have return successors, (7467), 4268 states have call predecessors, (7467), 4737 states have call successors, (7467) [2022-11-23 14:27:23,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34632 states to 34632 states and 58334 transitions. [2022-11-23 14:27:23,112 INFO L78 Accepts]: Start accepts. Automaton has 34632 states and 58334 transitions. Word has length 149 [2022-11-23 14:27:23,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:27:23,112 INFO L495 AbstractCegarLoop]: Abstraction has 34632 states and 58334 transitions. [2022-11-23 14:27:23,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 1 states have call successors, (22) [2022-11-23 14:27:23,113 INFO L276 IsEmpty]: Start isEmpty. Operand 34632 states and 58334 transitions. [2022-11-23 14:27:23,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-11-23 14:27:23,123 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:27:23,123 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:27:23,133 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1470ea-1ed4-4107-a790-9bc73094447a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-23 14:27:23,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1470ea-1ed4-4107-a790-9bc73094447a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:27:23,333 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:27:23,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:27:23,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1522840532, now seen corresponding path program 1 times [2022-11-23 14:27:23,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:27:23,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290040017] [2022-11-23 14:27:23,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:27:23,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:27:23,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:27:24,698 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-11-23 14:27:24,699 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:27:24,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290040017] [2022-11-23 14:27:24,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290040017] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:27:24,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204702034] [2022-11-23 14:27:24,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:27:24,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:27:24,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1470ea-1ed4-4107-a790-9bc73094447a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:27:24,701 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1470ea-1ed4-4107-a790-9bc73094447a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:27:24,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1470ea-1ed4-4107-a790-9bc73094447a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-23 14:27:25,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:27:25,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 1903 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-23 14:27:25,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:27:26,082 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-11-23 14:27:26,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:27:29,330 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 9813 disjunctions. This might take some time... [2022-11-23 14:27:37,429 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 9813 disjunctions. [2022-11-23 14:27:37,801 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 9813 disjunctions. This might take some time... [2022-11-23 14:27:46,181 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 9813 disjunctions. [2022-11-23 14:27:46,524 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 9813 disjunctions. This might take some time... [2022-11-23 14:27:55,344 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 9813 disjunctions. [2022-11-23 14:27:55,517 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 49188 disjunctions. This might take some time...