./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/token_ring.01.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e200b835-728f-4eac-81c7-c22b79972a1f/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e200b835-728f-4eac-81c7-c22b79972a1f/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e200b835-728f-4eac-81c7-c22b79972a1f/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e200b835-728f-4eac-81c7-c22b79972a1f/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/token_ring.01.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e200b835-728f-4eac-81c7-c22b79972a1f/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e200b835-728f-4eac-81c7-c22b79972a1f/bin/utaipan-7li7fVZpFI --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 327bb4ad7f981d20a6e5212aac300a9249d1857b0280531d57d587d5a0195c5f --- 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-5e519f3 [2022-11-03 04:02:20,880 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 04:02:20,882 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 04:02:20,909 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 04:02:20,910 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 04:02:20,911 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 04:02:20,912 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 04:02:20,914 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 04:02:20,916 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 04:02:20,917 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 04:02:20,918 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 04:02:20,919 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 04:02:20,920 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 04:02:20,921 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 04:02:20,924 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 04:02:20,925 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 04:02:20,926 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 04:02:20,927 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 04:02:20,928 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 04:02:20,930 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 04:02:20,932 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 04:02:20,933 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 04:02:20,935 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 04:02:20,936 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 04:02:20,939 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 04:02:20,940 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 04:02:20,940 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 04:02:20,941 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 04:02:20,942 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 04:02:20,943 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 04:02:20,943 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 04:02:20,944 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 04:02:20,945 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 04:02:20,946 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 04:02:20,947 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 04:02:20,947 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 04:02:20,948 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 04:02:20,948 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 04:02:20,948 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 04:02:20,949 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 04:02:20,950 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 04:02:20,951 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e200b835-728f-4eac-81c7-c22b79972a1f/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 04:02:20,975 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 04:02:20,975 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 04:02:20,976 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 04:02:20,976 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 04:02:20,977 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 04:02:20,977 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 04:02:20,977 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 04:02:20,977 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 04:02:20,977 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 04:02:20,978 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 04:02:20,978 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 04:02:20,978 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 04:02:20,978 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 04:02:20,978 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 04:02:20,978 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 04:02:20,979 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 04:02:20,979 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 04:02:20,979 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 04:02:20,980 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 04:02:20,980 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 04:02:20,980 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 04:02:20,980 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 04:02:20,981 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 04:02:20,981 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 04:02:20,981 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 04:02:20,981 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 04:02:20,981 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 04:02:20,982 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 04:02:20,982 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 04:02:20,982 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 04:02:20,982 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 04:02:20,982 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 04:02:20,982 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 04:02:20,983 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 04:02:20,983 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 04:02:20,983 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 04:02:20,983 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 04:02:20,983 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 04:02:20,984 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 04:02:20,984 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 04:02:20,984 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 04:02:20,984 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_e200b835-728f-4eac-81c7-c22b79972a1f/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e200b835-728f-4eac-81c7-c22b79972a1f/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 327bb4ad7f981d20a6e5212aac300a9249d1857b0280531d57d587d5a0195c5f [2022-11-03 04:02:21,279 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 04:02:21,312 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 04:02:21,317 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 04:02:21,319 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 04:02:21,320 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 04:02:21,321 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e200b835-728f-4eac-81c7-c22b79972a1f/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/systemc/token_ring.01.cil-2.c [2022-11-03 04:02:21,398 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e200b835-728f-4eac-81c7-c22b79972a1f/bin/utaipan-7li7fVZpFI/data/d416bdc14/800d1a311246485cb173602620bc73da/FLAGd036825d1 [2022-11-03 04:02:21,967 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 04:02:21,968 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e200b835-728f-4eac-81c7-c22b79972a1f/sv-benchmarks/c/systemc/token_ring.01.cil-2.c [2022-11-03 04:02:21,982 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e200b835-728f-4eac-81c7-c22b79972a1f/bin/utaipan-7li7fVZpFI/data/d416bdc14/800d1a311246485cb173602620bc73da/FLAGd036825d1 [2022-11-03 04:02:22,281 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e200b835-728f-4eac-81c7-c22b79972a1f/bin/utaipan-7li7fVZpFI/data/d416bdc14/800d1a311246485cb173602620bc73da [2022-11-03 04:02:22,283 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 04:02:22,285 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 04:02:22,290 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 04:02:22,290 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 04:02:22,300 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 04:02:22,301 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:02:22" (1/1) ... [2022-11-03 04:02:22,302 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a86d179 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:02:22, skipping insertion in model container [2022-11-03 04:02:22,302 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:02:22" (1/1) ... [2022-11-03 04:02:22,311 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 04:02:22,363 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 04:02:22,521 WARN L230 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_e200b835-728f-4eac-81c7-c22b79972a1f/sv-benchmarks/c/systemc/token_ring.01.cil-2.c[671,684] [2022-11-03 04:02:22,577 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 04:02:22,587 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 04:02:22,600 WARN L230 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_e200b835-728f-4eac-81c7-c22b79972a1f/sv-benchmarks/c/systemc/token_ring.01.cil-2.c[671,684] [2022-11-03 04:02:22,624 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 04:02:22,640 INFO L208 MainTranslator]: Completed translation [2022-11-03 04:02:22,641 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:02:22 WrapperNode [2022-11-03 04:02:22,641 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 04:02:22,642 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 04:02:22,643 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 04:02:22,643 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 04:02:22,651 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:02:22" (1/1) ... [2022-11-03 04:02:22,659 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:02:22" (1/1) ... [2022-11-03 04:02:22,685 INFO L138 Inliner]: procedures = 30, calls = 35, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 220 [2022-11-03 04:02:22,685 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 04:02:22,686 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 04:02:22,686 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 04:02:22,686 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 04:02:22,695 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:02:22" (1/1) ... [2022-11-03 04:02:22,696 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:02:22" (1/1) ... [2022-11-03 04:02:22,698 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:02:22" (1/1) ... [2022-11-03 04:02:22,698 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:02:22" (1/1) ... [2022-11-03 04:02:22,704 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:02:22" (1/1) ... [2022-11-03 04:02:22,710 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:02:22" (1/1) ... [2022-11-03 04:02:22,712 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:02:22" (1/1) ... [2022-11-03 04:02:22,713 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:02:22" (1/1) ... [2022-11-03 04:02:22,716 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 04:02:22,717 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 04:02:22,717 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 04:02:22,718 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 04:02:22,719 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:02:22" (1/1) ... [2022-11-03 04:02:22,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 04:02:22,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e200b835-728f-4eac-81c7-c22b79972a1f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:02:22,751 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e200b835-728f-4eac-81c7-c22b79972a1f/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 04:02:22,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e200b835-728f-4eac-81c7-c22b79972a1f/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 04:02:22,825 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 04:02:22,826 INFO L130 BoogieDeclarations]: Found specification of procedure error [2022-11-03 04:02:22,826 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2022-11-03 04:02:22,826 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-11-03 04:02:22,827 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-11-03 04:02:22,827 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-11-03 04:02:22,827 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-11-03 04:02:22,827 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-03 04:02:22,827 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-03 04:02:22,827 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-11-03 04:02:22,828 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-11-03 04:02:22,828 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-11-03 04:02:22,828 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-11-03 04:02:22,828 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 04:02:22,828 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-11-03 04:02:22,828 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-11-03 04:02:22,829 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 04:02:22,829 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 04:02:22,916 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 04:02:22,918 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 04:02:23,443 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 04:02:23,595 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 04:02:23,595 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-03 04:02:23,598 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:02:23 BoogieIcfgContainer [2022-11-03 04:02:23,598 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 04:02:23,603 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 04:02:23,604 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 04:02:23,608 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 04:02:23,608 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:02:22" (1/3) ... [2022-11-03 04:02:23,609 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@598472bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:02:23, skipping insertion in model container [2022-11-03 04:02:23,610 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:02:22" (2/3) ... [2022-11-03 04:02:23,610 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@598472bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:02:23, skipping insertion in model container [2022-11-03 04:02:23,610 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:02:23" (3/3) ... [2022-11-03 04:02:23,614 INFO L112 eAbstractionObserver]: Analyzing ICFG token_ring.01.cil-2.c [2022-11-03 04:02:23,635 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 04:02:23,635 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 04:02:23,714 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 04:02:23,731 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;@4da67794, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 04:02:23,731 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 04:02:23,740 INFO L276 IsEmpty]: Start isEmpty. Operand has 73 states, 47 states have (on average 1.4893617021276595) internal successors, (70), 51 states have internal predecessors, (70), 17 states have call successors, (17), 7 states have call predecessors, (17), 7 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-11-03 04:02:23,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-03 04:02:23,752 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:23,753 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] [2022-11-03 04:02:23,753 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:23,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:23,760 INFO L85 PathProgramCache]: Analyzing trace with hash -905615222, now seen corresponding path program 1 times [2022-11-03 04:02:23,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:02:23,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77234556] [2022-11-03 04:02:23,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:23,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:02:23,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:24,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:02:24,113 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:02:24,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77234556] [2022-11-03 04:02:24,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77234556] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:24,115 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:02:24,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:02:24,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160148330] [2022-11-03 04:02:24,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:24,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:02:24,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:02:24,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:02:24,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:02:24,166 INFO L87 Difference]: Start difference. First operand has 73 states, 47 states have (on average 1.4893617021276595) internal successors, (70), 51 states have internal predecessors, (70), 17 states have call successors, (17), 7 states have call predecessors, (17), 7 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-03 04:02:24,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:24,546 INFO L93 Difference]: Finished difference Result 195 states and 286 transitions. [2022-11-03 04:02:24,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 04:02:24,549 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2022-11-03 04:02:24,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:24,562 INFO L225 Difference]: With dead ends: 195 [2022-11-03 04:02:24,563 INFO L226 Difference]: Without dead ends: 123 [2022-11-03 04:02:24,570 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:02:24,576 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 153 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:24,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 206 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 04:02:24,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-11-03 04:02:24,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2022-11-03 04:02:24,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 81 states have (on average 1.308641975308642) internal successors, (106), 84 states have internal predecessors, (106), 28 states have call successors, (28), 13 states have call predecessors, (28), 12 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2022-11-03 04:02:24,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 160 transitions. [2022-11-03 04:02:24,630 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 160 transitions. Word has length 34 [2022-11-03 04:02:24,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:24,631 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 160 transitions. [2022-11-03 04:02:24,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-03 04:02:24,631 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 160 transitions. [2022-11-03 04:02:24,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-03 04:02:24,634 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:24,634 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:02:24,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 04:02:24,635 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:24,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:24,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1335534264, now seen corresponding path program 1 times [2022-11-03 04:02:24,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:02:24,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741858758] [2022-11-03 04:02:24,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:24,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:02:24,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:25,369 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 04:02:25,369 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:02:25,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741858758] [2022-11-03 04:02:25,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741858758] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:25,370 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:02:25,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 04:02:25,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286798218] [2022-11-03 04:02:25,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:25,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 04:02:25,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:02:25,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 04:02:25,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 04:02:25,373 INFO L87 Difference]: Start difference. First operand 122 states and 160 transitions. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-03 04:02:25,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:25,712 INFO L93 Difference]: Finished difference Result 354 states and 463 transitions. [2022-11-03 04:02:25,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 04:02:25,712 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 59 [2022-11-03 04:02:25,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:25,717 INFO L225 Difference]: With dead ends: 354 [2022-11-03 04:02:25,717 INFO L226 Difference]: Without dead ends: 238 [2022-11-03 04:02:25,718 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-03 04:02:25,720 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 173 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:25,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 254 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 04:02:25,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-11-03 04:02:25,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 222. [2022-11-03 04:02:25,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 149 states have (on average 1.2818791946308725) internal successors, (191), 153 states have internal predecessors, (191), 48 states have call successors, (48), 25 states have call predecessors, (48), 24 states have return successors, (46), 44 states have call predecessors, (46), 46 states have call successors, (46) [2022-11-03 04:02:25,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 285 transitions. [2022-11-03 04:02:25,761 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 285 transitions. Word has length 59 [2022-11-03 04:02:25,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:25,762 INFO L495 AbstractCegarLoop]: Abstraction has 222 states and 285 transitions. [2022-11-03 04:02:25,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-03 04:02:25,763 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 285 transitions. [2022-11-03 04:02:25,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-03 04:02:25,765 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:25,765 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:02:25,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 04:02:25,766 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:25,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:25,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1309257310, now seen corresponding path program 1 times [2022-11-03 04:02:25,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:02:25,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002320228] [2022-11-03 04:02:25,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:25,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:02:25,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:25,848 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 04:02:25,848 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:02:25,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002320228] [2022-11-03 04:02:25,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002320228] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:25,850 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:02:25,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 04:02:25,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691361168] [2022-11-03 04:02:25,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:25,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 04:02:25,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:02:25,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 04:02:25,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 04:02:25,856 INFO L87 Difference]: Start difference. First operand 222 states and 285 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-03 04:02:25,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:25,943 INFO L93 Difference]: Finished difference Result 390 states and 501 transitions. [2022-11-03 04:02:25,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 04:02:25,944 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 60 [2022-11-03 04:02:25,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:25,951 INFO L225 Difference]: With dead ends: 390 [2022-11-03 04:02:25,951 INFO L226 Difference]: Without dead ends: 272 [2022-11-03 04:02:25,956 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 [2022-11-03 04:02:25,963 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 27 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:25,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 186 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 04:02:25,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-11-03 04:02:25,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 242. [2022-11-03 04:02:26,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 165 states have (on average 1.290909090909091) internal successors, (213), 169 states have internal predecessors, (213), 50 states have call successors, (50), 27 states have call predecessors, (50), 26 states have return successors, (48), 46 states have call predecessors, (48), 48 states have call successors, (48) [2022-11-03 04:02:26,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 311 transitions. [2022-11-03 04:02:26,002 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 311 transitions. Word has length 60 [2022-11-03 04:02:26,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:26,003 INFO L495 AbstractCegarLoop]: Abstraction has 242 states and 311 transitions. [2022-11-03 04:02:26,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-03 04:02:26,003 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 311 transitions. [2022-11-03 04:02:26,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-03 04:02:26,006 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:26,007 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:02:26,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 04:02:26,007 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:26,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:26,008 INFO L85 PathProgramCache]: Analyzing trace with hash 2102453097, now seen corresponding path program 1 times [2022-11-03 04:02:26,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:02:26,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318402560] [2022-11-03 04:02:26,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:26,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:02:26,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:26,065 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-03 04:02:26,065 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:02:26,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318402560] [2022-11-03 04:02:26,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318402560] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:26,066 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:02:26,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 04:02:26,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511547055] [2022-11-03 04:02:26,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:26,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 04:02:26,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:02:26,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 04:02:26,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 04:02:26,068 INFO L87 Difference]: Start difference. First operand 242 states and 311 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 04:02:26,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:26,165 INFO L93 Difference]: Finished difference Result 598 states and 771 transitions. [2022-11-03 04:02:26,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 04:02:26,166 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 76 [2022-11-03 04:02:26,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:26,168 INFO L225 Difference]: With dead ends: 598 [2022-11-03 04:02:26,169 INFO L226 Difference]: Without dead ends: 361 [2022-11-03 04:02:26,170 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 [2022-11-03 04:02:26,171 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 64 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:26,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 184 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 04:02:26,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2022-11-03 04:02:26,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 354. [2022-11-03 04:02:26,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 243 states have (on average 1.2674897119341564) internal successors, (308), 248 states have internal predecessors, (308), 71 states have call successors, (71), 40 states have call predecessors, (71), 39 states have return successors, (69), 66 states have call predecessors, (69), 69 states have call successors, (69) [2022-11-03 04:02:26,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 448 transitions. [2022-11-03 04:02:26,214 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 448 transitions. Word has length 76 [2022-11-03 04:02:26,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:26,215 INFO L495 AbstractCegarLoop]: Abstraction has 354 states and 448 transitions. [2022-11-03 04:02:26,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 04:02:26,215 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 448 transitions. [2022-11-03 04:02:26,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-03 04:02:26,218 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:26,219 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:02:26,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 04:02:26,219 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:26,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:26,220 INFO L85 PathProgramCache]: Analyzing trace with hash 827810000, now seen corresponding path program 1 times [2022-11-03 04:02:26,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:02:26,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129823197] [2022-11-03 04:02:26,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:26,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:02:26,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:26,421 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-03 04:02:26,422 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:02:26,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129823197] [2022-11-03 04:02:26,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129823197] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:02:26,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375045234] [2022-11-03 04:02:26,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:26,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:02:26,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e200b835-728f-4eac-81c7-c22b79972a1f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:02:26,425 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e200b835-728f-4eac-81c7-c22b79972a1f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:02:26,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e200b835-728f-4eac-81c7-c22b79972a1f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 04:02:26,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:26,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 04:02:26,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:26,646 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 04:02:26,646 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:02:26,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375045234] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:26,647 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 04:02:26,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-03 04:02:26,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600471915] [2022-11-03 04:02:26,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:26,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 04:02:26,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:02:26,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 04:02:26,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:02:26,650 INFO L87 Difference]: Start difference. First operand 354 states and 448 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 04:02:26,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:26,745 INFO L93 Difference]: Finished difference Result 596 states and 772 transitions. [2022-11-03 04:02:26,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 04:02:26,745 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 87 [2022-11-03 04:02:26,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:26,748 INFO L225 Difference]: With dead ends: 596 [2022-11-03 04:02:26,748 INFO L226 Difference]: Without dead ends: 360 [2022-11-03 04:02:26,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:02:26,750 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 65 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:26,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 178 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 04:02:26,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2022-11-03 04:02:26,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 352. [2022-11-03 04:02:26,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 241 states have (on average 1.2282157676348548) internal successors, (296), 246 states have internal predecessors, (296), 71 states have call successors, (71), 40 states have call predecessors, (71), 39 states have return successors, (69), 66 states have call predecessors, (69), 69 states have call successors, (69) [2022-11-03 04:02:26,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 436 transitions. [2022-11-03 04:02:26,791 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 436 transitions. Word has length 87 [2022-11-03 04:02:26,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:26,792 INFO L495 AbstractCegarLoop]: Abstraction has 352 states and 436 transitions. [2022-11-03 04:02:26,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 04:02:26,792 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 436 transitions. [2022-11-03 04:02:26,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-03 04:02:26,794 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:26,794 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:02:26,842 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e200b835-728f-4eac-81c7-c22b79972a1f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 04:02:27,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e200b835-728f-4eac-81c7-c22b79972a1f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:02:27,018 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:27,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:27,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1536739954, now seen corresponding path program 1 times [2022-11-03 04:02:27,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:02:27,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62909233] [2022-11-03 04:02:27,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:27,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:02:27,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:27,208 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-03 04:02:27,208 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:02:27,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62909233] [2022-11-03 04:02:27,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62909233] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:02:27,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509208305] [2022-11-03 04:02:27,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:27,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:02:27,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e200b835-728f-4eac-81c7-c22b79972a1f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:02:27,211 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e200b835-728f-4eac-81c7-c22b79972a1f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:02:27,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e200b835-728f-4eac-81c7-c22b79972a1f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 04:02:27,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:27,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 04:02:27,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:27,370 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 04:02:27,370 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:02:27,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509208305] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:27,371 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 04:02:27,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-03 04:02:27,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415994897] [2022-11-03 04:02:27,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:27,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 04:02:27,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:02:27,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 04:02:27,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:02:27,373 INFO L87 Difference]: Start difference. First operand 352 states and 436 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 04:02:27,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:27,461 INFO L93 Difference]: Finished difference Result 646 states and 798 transitions. [2022-11-03 04:02:27,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 04:02:27,462 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 87 [2022-11-03 04:02:27,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:27,465 INFO L225 Difference]: With dead ends: 646 [2022-11-03 04:02:27,465 INFO L226 Difference]: Without dead ends: 413 [2022-11-03 04:02:27,466 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:02:27,467 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 73 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:27,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 97 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 04:02:27,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2022-11-03 04:02:27,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 413. [2022-11-03 04:02:27,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 292 states have (on average 1.1986301369863013) internal successors, (350), 297 states have internal predecessors, (350), 73 states have call successors, (73), 48 states have call predecessors, (73), 47 states have return successors, (71), 68 states have call predecessors, (71), 71 states have call successors, (71) [2022-11-03 04:02:27,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 494 transitions. [2022-11-03 04:02:27,515 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 494 transitions. Word has length 87 [2022-11-03 04:02:27,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:27,516 INFO L495 AbstractCegarLoop]: Abstraction has 413 states and 494 transitions. [2022-11-03 04:02:27,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 04:02:27,517 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 494 transitions. [2022-11-03 04:02:27,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-03 04:02:27,519 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:27,519 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:02:27,565 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e200b835-728f-4eac-81c7-c22b79972a1f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 04:02:27,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e200b835-728f-4eac-81c7-c22b79972a1f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:02:27,738 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:27,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:27,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1917919661, now seen corresponding path program 1 times [2022-11-03 04:02:27,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:02:27,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165677486] [2022-11-03 04:02:27,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:27,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:02:27,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:27,960 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-03 04:02:27,960 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:02:27,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165677486] [2022-11-03 04:02:27,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165677486] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:02:27,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470986685] [2022-11-03 04:02:27,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:27,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:02:27,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e200b835-728f-4eac-81c7-c22b79972a1f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:02:27,962 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e200b835-728f-4eac-81c7-c22b79972a1f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:02:27,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e200b835-728f-4eac-81c7-c22b79972a1f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 04:02:28,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:28,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 04:02:28,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:28,142 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 04:02:28,143 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:02:28,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470986685] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:28,144 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 04:02:28,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-03 04:02:28,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265303786] [2022-11-03 04:02:28,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:28,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 04:02:28,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:02:28,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 04:02:28,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:02:28,150 INFO L87 Difference]: Start difference. First operand 413 states and 494 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 04:02:28,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:28,277 INFO L93 Difference]: Finished difference Result 965 states and 1154 transitions. [2022-11-03 04:02:28,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 04:02:28,277 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (11), 3 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 88 [2022-11-03 04:02:28,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:28,281 INFO L225 Difference]: With dead ends: 965 [2022-11-03 04:02:28,281 INFO L226 Difference]: Without dead ends: 558 [2022-11-03 04:02:28,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:02:28,284 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 39 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:28,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 159 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 04:02:28,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2022-11-03 04:02:28,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 449. [2022-11-03 04:02:28,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 318 states have (on average 1.20125786163522) internal successors, (382), 324 states have internal predecessors, (382), 78 states have call successors, (78), 53 states have call predecessors, (78), 52 states have return successors, (76), 72 states have call predecessors, (76), 76 states have call successors, (76) [2022-11-03 04:02:28,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 536 transitions. [2022-11-03 04:02:28,346 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 536 transitions. Word has length 88 [2022-11-03 04:02:28,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:28,346 INFO L495 AbstractCegarLoop]: Abstraction has 449 states and 536 transitions. [2022-11-03 04:02:28,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 04:02:28,347 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 536 transitions. [2022-11-03 04:02:28,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-03 04:02:28,349 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:28,349 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:02:28,389 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e200b835-728f-4eac-81c7-c22b79972a1f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 04:02:28,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e200b835-728f-4eac-81c7-c22b79972a1f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:02:28,566 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:28,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:28,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1927408670, now seen corresponding path program 1 times [2022-11-03 04:02:28,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:02:28,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312156700] [2022-11-03 04:02:28,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:28,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:02:28,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:28,656 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-03 04:02:28,656 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:02:28,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312156700] [2022-11-03 04:02:28,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312156700] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:02:28,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901311743] [2022-11-03 04:02:28,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:28,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:02:28,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e200b835-728f-4eac-81c7-c22b79972a1f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:02:28,658 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e200b835-728f-4eac-81c7-c22b79972a1f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:02:28,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e200b835-728f-4eac-81c7-c22b79972a1f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 04:02:28,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:28,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 04:02:28,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:28,821 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 04:02:28,821 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:02:28,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901311743] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:28,822 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 04:02:28,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-03 04:02:28,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780217493] [2022-11-03 04:02:28,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:28,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 04:02:28,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:02:28,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 04:02:28,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 04:02:28,830 INFO L87 Difference]: Start difference. First operand 449 states and 536 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 04:02:28,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:28,956 INFO L93 Difference]: Finished difference Result 846 states and 1015 transitions. [2022-11-03 04:02:28,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 04:02:28,957 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 88 [2022-11-03 04:02:28,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:28,960 INFO L225 Difference]: With dead ends: 846 [2022-11-03 04:02:28,960 INFO L226 Difference]: Without dead ends: 552 [2022-11-03 04:02:28,962 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 04:02:28,962 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 42 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:28,963 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 188 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 04:02:28,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2022-11-03 04:02:29,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 483. [2022-11-03 04:02:29,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 344 states have (on average 1.2093023255813953) internal successors, (416), 350 states have internal predecessors, (416), 82 states have call successors, (82), 57 states have call predecessors, (82), 56 states have return successors, (80), 76 states have call predecessors, (80), 80 states have call successors, (80) [2022-11-03 04:02:29,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 578 transitions. [2022-11-03 04:02:29,024 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 578 transitions. Word has length 88 [2022-11-03 04:02:29,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:29,024 INFO L495 AbstractCegarLoop]: Abstraction has 483 states and 578 transitions. [2022-11-03 04:02:29,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 04:02:29,025 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 578 transitions. [2022-11-03 04:02:29,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-11-03 04:02:29,027 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:29,027 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:02:29,070 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e200b835-728f-4eac-81c7-c22b79972a1f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 04:02:29,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e200b835-728f-4eac-81c7-c22b79972a1f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:02:29,254 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:29,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:29,254 INFO L85 PathProgramCache]: Analyzing trace with hash 1128151055, now seen corresponding path program 1 times [2022-11-03 04:02:29,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:02:29,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421891397] [2022-11-03 04:02:29,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:29,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:02:29,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:29,424 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-03 04:02:29,424 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:02:29,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421891397] [2022-11-03 04:02:29,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421891397] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:29,425 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:02:29,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:02:29,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851061762] [2022-11-03 04:02:29,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:29,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:02:29,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:02:29,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:02:29,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:02:29,431 INFO L87 Difference]: Start difference. First operand 483 states and 578 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 04:02:29,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:29,725 INFO L93 Difference]: Finished difference Result 1227 states and 1476 transitions. [2022-11-03 04:02:29,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 04:02:29,726 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 89 [2022-11-03 04:02:29,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:29,730 INFO L225 Difference]: With dead ends: 1227 [2022-11-03 04:02:29,731 INFO L226 Difference]: Without dead ends: 977 [2022-11-03 04:02:29,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:02:29,732 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 136 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:29,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 243 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:02:29,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2022-11-03 04:02:29,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 781. [2022-11-03 04:02:29,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 781 states, 556 states have (on average 1.2122302158273381) internal successors, (674), 561 states have internal predecessors, (674), 133 states have call successors, (133), 92 states have call predecessors, (133), 91 states have return successors, (131), 128 states have call predecessors, (131), 131 states have call successors, (131) [2022-11-03 04:02:29,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 938 transitions. [2022-11-03 04:02:29,859 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 938 transitions. Word has length 89 [2022-11-03 04:02:29,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:29,860 INFO L495 AbstractCegarLoop]: Abstraction has 781 states and 938 transitions. [2022-11-03 04:02:29,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 04:02:29,860 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 938 transitions. [2022-11-03 04:02:29,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-03 04:02:29,862 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:29,862 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:02:29,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-03 04:02:29,866 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:29,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:29,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1241657735, now seen corresponding path program 1 times [2022-11-03 04:02:29,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:02:29,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294463276] [2022-11-03 04:02:29,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:29,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:02:29,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 04:02:29,885 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-03 04:02:29,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 04:02:29,958 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-03 04:02:29,959 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-03 04:02:29,960 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location errorErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-03 04:02:29,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-03 04:02:29,966 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:02:29,970 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-03 04:02:30,088 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 04:02:30 BoogieIcfgContainer [2022-11-03 04:02:30,088 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-03 04:02:30,090 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-03 04:02:30,090 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-03 04:02:30,090 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-03 04:02:30,091 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:02:23" (3/4) ... [2022-11-03 04:02:30,093 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-11-03 04:02:30,172 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e200b835-728f-4eac-81c7-c22b79972a1f/bin/utaipan-7li7fVZpFI/witness.graphml [2022-11-03 04:02:30,172 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-03 04:02:30,172 INFO L158 Benchmark]: Toolchain (without parser) took 7887.61ms. Allocated memory was 119.5MB in the beginning and 192.9MB in the end (delta: 73.4MB). Free memory was 88.5MB in the beginning and 97.7MB in the end (delta: -9.2MB). Peak memory consumption was 62.4MB. Max. memory is 16.1GB. [2022-11-03 04:02:30,173 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 83.9MB. Free memory is still 39.0MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 04:02:30,173 INFO L158 Benchmark]: CACSL2BoogieTranslator took 351.94ms. Allocated memory is still 119.5MB. Free memory was 88.5MB in the beginning and 92.7MB in the end (delta: -4.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-03 04:02:30,173 INFO L158 Benchmark]: Boogie Procedure Inliner took 43.08ms. Allocated memory is still 119.5MB. Free memory was 92.7MB in the beginning and 90.8MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 04:02:30,174 INFO L158 Benchmark]: Boogie Preprocessor took 30.43ms. Allocated memory is still 119.5MB. Free memory was 90.8MB in the beginning and 89.0MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 04:02:30,174 INFO L158 Benchmark]: RCFGBuilder took 881.40ms. Allocated memory is still 119.5MB. Free memory was 89.0MB in the beginning and 59.7MB in the end (delta: 29.4MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. [2022-11-03 04:02:30,175 INFO L158 Benchmark]: TraceAbstraction took 6484.93ms. Allocated memory was 119.5MB in the beginning and 192.9MB in the end (delta: 73.4MB). Free memory was 58.9MB in the beginning and 106.1MB in the end (delta: -47.2MB). Peak memory consumption was 27.8MB. Max. memory is 16.1GB. [2022-11-03 04:02:30,175 INFO L158 Benchmark]: Witness Printer took 81.93ms. Allocated memory is still 192.9MB. Free memory was 106.1MB in the beginning and 97.7MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-03 04:02:30,177 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 83.9MB. Free memory is still 39.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 351.94ms. Allocated memory is still 119.5MB. Free memory was 88.5MB in the beginning and 92.7MB in the end (delta: -4.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 43.08ms. Allocated memory is still 119.5MB. Free memory was 92.7MB in the beginning and 90.8MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 30.43ms. Allocated memory is still 119.5MB. Free memory was 90.8MB in the beginning and 89.0MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 881.40ms. Allocated memory is still 119.5MB. Free memory was 89.0MB in the beginning and 59.7MB in the end (delta: 29.4MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. * TraceAbstraction took 6484.93ms. Allocated memory was 119.5MB in the beginning and 192.9MB in the end (delta: 73.4MB). Free memory was 58.9MB in the beginning and 106.1MB in the end (delta: -47.2MB). Peak memory consumption was 27.8MB. Max. memory is 16.1GB. * Witness Printer took 81.93ms. Allocated memory is still 192.9MB. Free memory was 106.1MB in the beginning and 97.7MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 20]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L24] int m_pc = 0; [L25] int t1_pc = 0; [L26] int m_st ; [L27] int t1_st ; [L28] int m_i ; [L29] int t1_i ; [L30] int M_E = 2; [L31] int T1_E = 2; [L32] int E_M = 2; [L33] int E_1 = 2; [L37] int token ; [L39] int local ; [L485] int __retres1 ; [L489] CALL init_model() [L400] m_i = 1 [L401] t1_i = 1 [L489] RET init_model() [L490] CALL start_simulation() [L426] int kernel_st ; [L427] int tmp ; [L428] int tmp___0 ; [L432] kernel_st = 0 VAL [E_1=2, E_M=2, kernel_st=0, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, token=0] [L433] FCALL update_channels() VAL [E_1=2, E_M=2, kernel_st=0, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, token=0] [L434] CALL init_threads() [L182] COND TRUE m_i == 1 [L183] m_st = 0 [L187] COND TRUE t1_i == 1 [L188] t1_st = 0 [L434] RET init_threads() [L435] CALL fire_delta_events() VAL [\old(E_1)=2, \old(E_M)=2, \old(M_E)=2, \old(T1_E)=2, E_1=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, token=0] [L271] COND FALSE !(M_E == 0) [L276] COND FALSE !(T1_E == 0) [L281] COND FALSE !(E_M == 0) [L286] COND FALSE !(E_1 == 0) [L435] RET fire_delta_events() VAL [E_1=2, E_M=2, kernel_st=0, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, token=0] [L436] CALL activate_threads() VAL [\old(m_st)=0, \old(t1_st)=0, E_1=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, token=0] [L324] int tmp ; [L325] int tmp___0 ; [L329] CALL, EXPR is_master_triggered() [L133] int __retres1 ; VAL [\old(m_st)=0, \old(t1_st)=0, E_1=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, token=0] [L136] COND FALSE !(m_pc == 1) VAL [\old(m_st)=0, \old(t1_st)=0, E_1=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, token=0] [L146] __retres1 = 0 VAL [\old(m_st)=0, \old(t1_st)=0, __retres1=0, E_1=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, token=0] [L148] return (__retres1); [L329] RET, EXPR is_master_triggered() [L329] tmp = is_master_triggered() [L331] COND FALSE !(\read(tmp)) [L337] CALL, EXPR is_transmit1_triggered() [L152] int __retres1 ; VAL [\old(m_st)=0, \old(t1_st)=0, E_1=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, token=0] [L155] COND FALSE !(t1_pc == 1) VAL [\old(m_st)=0, \old(t1_st)=0, E_1=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, token=0] [L165] __retres1 = 0 VAL [\old(m_st)=0, \old(t1_st)=0, __retres1=0, E_1=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, token=0] [L167] return (__retres1); [L337] RET, EXPR is_transmit1_triggered() [L337] tmp___0 = is_transmit1_triggered() [L339] COND FALSE !(\read(tmp___0)) [L436] RET activate_threads() VAL [E_1=2, E_M=2, kernel_st=0, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, token=0] [L437] CALL reset_delta_events() VAL [\old(E_1)=2, \old(E_M)=2, \old(M_E)=2, \old(T1_E)=2, E_1=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, token=0] [L299] COND FALSE !(M_E == 1) [L304] COND FALSE !(T1_E == 1) [L309] COND FALSE !(E_M == 1) [L314] COND FALSE !(E_1 == 1) [L437] RET reset_delta_events() VAL [E_1=2, E_M=2, kernel_st=0, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, token=0] [L440] COND TRUE 1 [L443] kernel_st = 1 [L444] CALL eval() [L218] int tmp ; VAL [E_1=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, token=0] [L222] COND TRUE 1 VAL [E_1=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, token=0] [L225] CALL, EXPR exists_runnable_thread() VAL [E_1=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, token=0] [L197] int __retres1 ; [L200] COND TRUE m_st == 0 [L201] __retres1 = 1 [L213] return (__retres1); [L225] RET, EXPR exists_runnable_thread() VAL [E_1=2, E_M=2, exists_runnable_thread()=1, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, token=0] [L225] tmp = exists_runnable_thread() [L227] COND TRUE \read(tmp) VAL [E_1=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, tmp=1, token=0] [L232] COND TRUE m_st == 0 [L233] int tmp_ndt_1; [L234] tmp_ndt_1 = __VERIFIER_nondet_int() [L235] COND FALSE !(\read(tmp_ndt_1)) VAL [E_1=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, tmp=1, tmp_ndt_1=0, token=0] [L246] COND TRUE t1_st == 0 [L247] int tmp_ndt_2; [L248] tmp_ndt_2 = __VERIFIER_nondet_int() [L249] COND TRUE \read(tmp_ndt_2) [L251] t1_st = 1 [L252] CALL transmit1() [L100] COND TRUE t1_pc == 0 VAL [E_1=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=1, token=0] [L111] COND TRUE 1 [L113] t1_pc = 1 [L114] t1_st = 2 [L252] RET transmit1() [L222] COND TRUE 1 VAL [E_1=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, tmp=1, tmp_ndt_1=0, tmp_ndt_2=-1, token=0] [L225] CALL, EXPR exists_runnable_thread() VAL [E_1=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, token=0] [L197] int __retres1 ; [L200] COND TRUE m_st == 0 [L201] __retres1 = 1 [L213] return (__retres1); [L225] RET, EXPR exists_runnable_thread() VAL [E_1=2, E_M=2, exists_runnable_thread()=1, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, tmp=1, tmp_ndt_1=0, tmp_ndt_2=-1, token=0] [L225] tmp = exists_runnable_thread() [L227] COND TRUE \read(tmp) VAL [E_1=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, tmp=1, tmp_ndt_1=0, tmp_ndt_2=-1, token=0] [L232] COND TRUE m_st == 0 [L233] int tmp_ndt_1; [L234] tmp_ndt_1 = __VERIFIER_nondet_int() [L235] COND TRUE \read(tmp_ndt_1) [L237] m_st = 1 [L238] CALL master() [L42] int tmp_var = __VERIFIER_nondet_int(); [L44] COND TRUE m_pc == 0 VAL [E_1=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, tmp_var=0, token=0] [L55] COND TRUE 1 [L58] token = __VERIFIER_nondet_int() [L59] local = token [L60] E_1 = 1 VAL [E_1=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, tmp_var=0, token=0] [L61] CALL immediate_notify() VAL [\old(m_st)=1, \old(t1_st)=2, E_1=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, token=0] [L353] CALL activate_threads() VAL [\old(m_st)=1, \old(t1_st)=2, E_1=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, token=0] [L324] int tmp ; [L325] int tmp___0 ; [L329] CALL, EXPR is_master_triggered() [L133] int __retres1 ; VAL [\old(m_st)=1, \old(t1_st)=2, E_1=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, token=0] [L136] COND FALSE !(m_pc == 1) VAL [\old(m_st)=1, \old(t1_st)=2, E_1=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, token=0] [L146] __retres1 = 0 VAL [\old(m_st)=1, \old(t1_st)=2, __retres1=0, E_1=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, token=0] [L148] return (__retres1); [L329] RET, EXPR is_master_triggered() [L329] tmp = is_master_triggered() [L331] COND FALSE !(\read(tmp)) [L337] CALL, EXPR is_transmit1_triggered() [L152] int __retres1 ; VAL [\old(m_st)=1, \old(t1_st)=2, E_1=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, token=0] [L155] COND TRUE t1_pc == 1 VAL [\old(m_st)=1, \old(t1_st)=2, E_1=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, token=0] [L156] COND TRUE E_1 == 1 [L157] __retres1 = 1 VAL [\old(m_st)=1, \old(t1_st)=2, __retres1=1, E_1=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, token=0] [L167] return (__retres1); [L337] RET, EXPR is_transmit1_triggered() [L337] tmp___0 = is_transmit1_triggered() [L339] COND TRUE \read(tmp___0) [L340] t1_st = 0 [L353] RET activate_threads() VAL [\old(m_st)=1, \old(t1_st)=2, E_1=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=0, token=0] [L61] RET immediate_notify() VAL [E_1=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=0, tmp_var=0, token=0] [L62] E_1 = 2 [L63] m_pc = 1 [L64] m_st = 2 VAL [E_1=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=0, tmp_var=0, token=0] [L238] RET master() [L246] COND TRUE t1_st == 0 [L247] int tmp_ndt_2; [L248] tmp_ndt_2 = __VERIFIER_nondet_int() [L249] COND TRUE \read(tmp_ndt_2) [L251] t1_st = 1 [L252] CALL transmit1() [L100] COND FALSE !(t1_pc == 0) VAL [E_1=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, token=0] [L103] COND TRUE t1_pc == 1 [L119] token += 1 [L120] E_M = 1 VAL [E_1=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, token=1] [L121] CALL immediate_notify() VAL [\old(m_st)=2, \old(t1_st)=1, E_1=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, token=1] [L353] CALL activate_threads() VAL [\old(m_st)=2, \old(t1_st)=1, E_1=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, token=1] [L324] int tmp ; [L325] int tmp___0 ; [L329] CALL, EXPR is_master_triggered() [L133] int __retres1 ; VAL [\old(m_st)=2, \old(t1_st)=1, E_1=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, token=1] [L136] COND TRUE m_pc == 1 VAL [\old(m_st)=2, \old(t1_st)=1, E_1=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, token=1] [L137] COND TRUE E_M == 1 [L138] __retres1 = 1 VAL [\old(m_st)=2, \old(t1_st)=1, __retres1=1, E_1=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, token=1] [L148] return (__retres1); [L329] RET, EXPR is_master_triggered() [L329] tmp = is_master_triggered() [L331] COND TRUE \read(tmp) [L332] m_st = 0 [L337] CALL, EXPR is_transmit1_triggered() [L152] int __retres1 ; VAL [\old(m_st)=2, \old(t1_st)=1, E_1=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, token=1] [L155] COND TRUE t1_pc == 1 VAL [\old(m_st)=2, \old(t1_st)=1, E_1=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, token=1] [L156] COND FALSE !(E_1 == 1) VAL [\old(m_st)=2, \old(t1_st)=1, E_1=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, token=1] [L165] __retres1 = 0 VAL [\old(m_st)=2, \old(t1_st)=1, __retres1=0, E_1=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, token=1] [L167] return (__retres1); [L337] RET, EXPR is_transmit1_triggered() [L337] tmp___0 = is_transmit1_triggered() [L339] COND FALSE !(\read(tmp___0)) [L353] RET activate_threads() VAL [\old(m_st)=2, \old(t1_st)=1, E_1=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, token=1] [L121] RET immediate_notify() VAL [E_1=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, token=1] [L122] E_M = 2 VAL [E_1=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, token=1] [L111] COND TRUE 1 [L113] t1_pc = 1 [L114] t1_st = 2 [L252] RET transmit1() [L222] COND TRUE 1 VAL [E_1=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, tmp=1, tmp_ndt_1=1, tmp_ndt_2=-2, token=1] [L225] CALL, EXPR exists_runnable_thread() VAL [E_1=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, token=1] [L197] int __retres1 ; [L200] COND TRUE m_st == 0 [L201] __retres1 = 1 [L213] return (__retres1); [L225] RET, EXPR exists_runnable_thread() VAL [E_1=2, E_M=2, exists_runnable_thread()=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, tmp=1, tmp_ndt_1=1, tmp_ndt_2=-2, token=1] [L225] tmp = exists_runnable_thread() [L227] COND TRUE \read(tmp) VAL [E_1=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, tmp=1, tmp_ndt_1=1, tmp_ndt_2=-2, token=1] [L232] COND TRUE m_st == 0 [L233] int tmp_ndt_1; [L234] tmp_ndt_1 = __VERIFIER_nondet_int() [L235] COND TRUE \read(tmp_ndt_1) [L237] m_st = 1 [L238] CALL master() [L42] int tmp_var = __VERIFIER_nondet_int(); [L44] COND FALSE !(m_pc == 0) VAL [E_1=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, tmp_var=5, token=1] [L47] COND TRUE m_pc == 1 VAL [E_1=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, tmp_var=5, token=1] [L69] COND FALSE !(token != local + 1) [L74] COND TRUE tmp_var <= 5 [L75] COND TRUE tmp_var >= 5 VAL [E_1=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, tmp_var=5, token=1] [L80] COND TRUE tmp_var <= 5 VAL [E_1=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, tmp_var=5, token=1] [L81] COND TRUE tmp_var >= 5 VAL [E_1=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, tmp_var=5, token=1] [L82] COND TRUE tmp_var == 5 VAL [E_1=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, tmp_var=5, token=1] [L83] CALL error() VAL [E_1=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, token=1] [L20] reach_error() VAL [E_1=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, token=1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 8 procedures, 73 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 6.3s, OverallIterations: 10, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 781 SdHoareTripleChecker+Valid, 1.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 772 mSDsluCounter, 1695 SdHoareTripleChecker+Invalid, 0.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 834 mSDsCounter, 118 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 613 IncrementalHoareTripleChecker+Invalid, 731 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 118 mSolverCounterUnsat, 989 mSDtfsCounter, 613 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 410 GetRequests, 376 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=781occurred in iteration=9, InterpolantAutomatonStates: 34, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 9 MinimizatonAttempts, 436 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 1.9s InterpolantComputationTime, 1110 NumberOfCodeBlocks, 1110 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 1005 ConstructedInterpolants, 0 QuantifiedInterpolants, 1583 SizeOfPredicates, 0 NumberOfNonLiveVariables, 1409 ConjunctsInSsa, 10 ConjunctsInUnsatCore, 13 InterpolantComputations, 9 PerfectInterpolantSequences, 488/531 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-11-03 04:02:30,230 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e200b835-728f-4eac-81c7-c22b79972a1f/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE