./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-ext/10_fmaxsym_cas.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f3555b-2426-4daf-b46e-02397f387ce3/bin/utaipan-G1rejxKTta/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f3555b-2426-4daf-b46e-02397f387ce3/bin/utaipan-G1rejxKTta/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f3555b-2426-4daf-b46e-02397f387ce3/bin/utaipan-G1rejxKTta/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f3555b-2426-4daf-b46e-02397f387ce3/bin/utaipan-G1rejxKTta/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread-ext/10_fmaxsym_cas.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f3555b-2426-4daf-b46e-02397f387ce3/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f3555b-2426-4daf-b46e-02397f387ce3/bin/utaipan-G1rejxKTta --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 a11d0cba01cb66911cac56797cb36d325dc008752ffb55c25c965bd0644c21c3 --- 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-dbf71c6-m [2022-10-17 17:22:12,978 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 17:22:12,979 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 17:22:13,013 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 17:22:13,014 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 17:22:13,015 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 17:22:13,017 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 17:22:13,020 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 17:22:13,022 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 17:22:13,024 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 17:22:13,025 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 17:22:13,027 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 17:22:13,027 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 17:22:13,029 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 17:22:13,030 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 17:22:13,032 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 17:22:13,034 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 17:22:13,035 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 17:22:13,038 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 17:22:13,040 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 17:22:13,043 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 17:22:13,044 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 17:22:13,046 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 17:22:13,047 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 17:22:13,053 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 17:22:13,053 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 17:22:13,054 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 17:22:13,055 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 17:22:13,056 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 17:22:13,057 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 17:22:13,058 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 17:22:13,059 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 17:22:13,060 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 17:22:13,061 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 17:22:13,062 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 17:22:13,062 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 17:22:13,063 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 17:22:13,064 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 17:22:13,064 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 17:22:13,066 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 17:22:13,067 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 17:22:13,068 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f3555b-2426-4daf-b46e-02397f387ce3/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-10-17 17:22:13,097 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 17:22:13,097 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 17:22:13,098 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 17:22:13,098 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 17:22:13,099 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 17:22:13,100 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 17:22:13,100 INFO L138 SettingsManager]: * User list type=DISABLED [2022-10-17 17:22:13,101 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-10-17 17:22:13,101 INFO L138 SettingsManager]: * Explicit value domain=true [2022-10-17 17:22:13,101 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-10-17 17:22:13,117 INFO L138 SettingsManager]: * Octagon Domain=false [2022-10-17 17:22:13,118 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-10-17 17:22:13,118 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-10-17 17:22:13,118 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-10-17 17:22:13,119 INFO L138 SettingsManager]: * Interval Domain=false [2022-10-17 17:22:13,119 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-10-17 17:22:13,119 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-10-17 17:22:13,120 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-10-17 17:22:13,121 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 17:22:13,121 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 17:22:13,121 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 17:22:13,121 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 17:22:13,122 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 17:22:13,122 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 17:22:13,122 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 17:22:13,122 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 17:22:13,122 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 17:22:13,123 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 17:22:13,123 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 17:22:13,123 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 17:22:13,123 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 17:22:13,124 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 17:22:13,124 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:22:13,124 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 17:22:13,124 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-10-17 17:22:13,125 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 17:22:13,125 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 17:22:13,125 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-10-17 17:22:13,125 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 17:22:13,126 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 17:22:13,126 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-10-17 17:22:13,126 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_95f3555b-2426-4daf-b46e-02397f387ce3/bin/utaipan-G1rejxKTta/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f3555b-2426-4daf-b46e-02397f387ce3/bin/utaipan-G1rejxKTta Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a11d0cba01cb66911cac56797cb36d325dc008752ffb55c25c965bd0644c21c3 [2022-10-17 17:22:13,367 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 17:22:13,387 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 17:22:13,389 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 17:22:13,391 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 17:22:13,392 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 17:22:13,393 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f3555b-2426-4daf-b46e-02397f387ce3/bin/utaipan-G1rejxKTta/../../sv-benchmarks/c/pthread-ext/10_fmaxsym_cas.i [2022-10-17 17:22:13,457 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f3555b-2426-4daf-b46e-02397f387ce3/bin/utaipan-G1rejxKTta/data/9e8e31b4c/2615d4a20527496bb22be723e8e35f48/FLAG8e02642e3 [2022-10-17 17:22:14,008 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 17:22:14,009 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f3555b-2426-4daf-b46e-02397f387ce3/sv-benchmarks/c/pthread-ext/10_fmaxsym_cas.i [2022-10-17 17:22:14,035 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f3555b-2426-4daf-b46e-02397f387ce3/bin/utaipan-G1rejxKTta/data/9e8e31b4c/2615d4a20527496bb22be723e8e35f48/FLAG8e02642e3 [2022-10-17 17:22:14,282 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f3555b-2426-4daf-b46e-02397f387ce3/bin/utaipan-G1rejxKTta/data/9e8e31b4c/2615d4a20527496bb22be723e8e35f48 [2022-10-17 17:22:14,306 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 17:22:14,308 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 17:22:14,312 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 17:22:14,313 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 17:22:14,317 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 17:22:14,317 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:22:14" (1/1) ... [2022-10-17 17:22:14,319 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4cb98bf6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:22:14, skipping insertion in model container [2022-10-17 17:22:14,320 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:22:14" (1/1) ... [2022-10-17 17:22:14,327 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 17:22:14,388 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 17:22:14,699 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_95f3555b-2426-4daf-b46e-02397f387ce3/sv-benchmarks/c/pthread-ext/10_fmaxsym_cas.i[30467,30480] [2022-10-17 17:22:14,707 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:22:14,716 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 17:22:14,753 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_95f3555b-2426-4daf-b46e-02397f387ce3/sv-benchmarks/c/pthread-ext/10_fmaxsym_cas.i[30467,30480] [2022-10-17 17:22:14,756 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:22:14,795 INFO L208 MainTranslator]: Completed translation [2022-10-17 17:22:14,795 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:22:14 WrapperNode [2022-10-17 17:22:14,795 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 17:22:14,797 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 17:22:14,797 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 17:22:14,797 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 17:22:14,804 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:22:14" (1/1) ... [2022-10-17 17:22:14,818 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:22:14" (1/1) ... [2022-10-17 17:22:14,846 INFO L138 Inliner]: procedures = 170, calls = 32, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 96 [2022-10-17 17:22:14,847 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 17:22:14,847 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 17:22:14,848 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 17:22:14,848 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 17:22:14,859 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:22:14" (1/1) ... [2022-10-17 17:22:14,859 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:22:14" (1/1) ... [2022-10-17 17:22:14,870 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:22:14" (1/1) ... [2022-10-17 17:22:14,870 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:22:14" (1/1) ... [2022-10-17 17:22:14,885 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:22:14" (1/1) ... [2022-10-17 17:22:14,889 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:22:14" (1/1) ... [2022-10-17 17:22:14,891 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:22:14" (1/1) ... [2022-10-17 17:22:14,899 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:22:14" (1/1) ... [2022-10-17 17:22:14,909 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 17:22:14,910 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 17:22:14,910 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 17:22:14,910 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 17:22:14,917 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:22:14" (1/1) ... [2022-10-17 17:22:14,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:22:14,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f3555b-2426-4daf-b46e-02397f387ce3/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:22:14,949 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f3555b-2426-4daf-b46e-02397f387ce3/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 17:22:14,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f3555b-2426-4daf-b46e-02397f387ce3/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 17:22:14,987 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-17 17:22:14,987 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-10-17 17:22:14,987 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-10-17 17:22:14,987 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-17 17:22:14,987 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 17:22:14,988 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-17 17:22:14,988 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-17 17:22:14,988 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 17:22:14,988 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 17:22:14,988 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 17:22:14,990 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-10-17 17:22:15,104 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 17:22:15,106 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 17:22:15,407 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 17:22:15,528 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 17:22:15,528 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-10-17 17:22:15,531 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:22:15 BoogieIcfgContainer [2022-10-17 17:22:15,531 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 17:22:15,534 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 17:22:15,534 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 17:22:15,539 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 17:22:15,543 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 05:22:14" (1/3) ... [2022-10-17 17:22:15,544 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@638c948b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:22:15, skipping insertion in model container [2022-10-17 17:22:15,544 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:22:14" (2/3) ... [2022-10-17 17:22:15,544 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@638c948b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:22:15, skipping insertion in model container [2022-10-17 17:22:15,545 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:22:15" (3/3) ... [2022-10-17 17:22:15,546 INFO L112 eAbstractionObserver]: Analyzing ICFG 10_fmaxsym_cas.i [2022-10-17 17:22:15,560 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-10-17 17:22:15,571 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 17:22:15,571 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 17:22:15,571 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-10-17 17:22:15,674 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-10-17 17:22:15,727 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-10-17 17:22:15,741 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 90 places, 96 transitions, 197 flow [2022-10-17 17:22:15,744 INFO L112 LiptonReduction]: Starting Lipton reduction on Petri net that has 90 places, 96 transitions, 197 flow [2022-10-17 17:22:15,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 90 places, 96 transitions, 197 flow [2022-10-17 17:22:15,837 INFO L130 PetriNetUnfolder]: 10/107 cut-off events. [2022-10-17 17:22:15,838 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-10-17 17:22:15,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112 conditions, 107 events. 10/107 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 107 event pairs, 0 based on Foata normal form. 0/94 useless extension candidates. Maximal degree in co-relation 70. Up to 4 conditions per place. [2022-10-17 17:22:15,847 INFO L118 LiptonReduction]: Number of co-enabled transitions 1596 [2022-10-17 17:22:19,242 INFO L133 LiptonReduction]: Checked pairs total: 1674 [2022-10-17 17:22:19,242 INFO L135 LiptonReduction]: Total number of compositions: 95 [2022-10-17 17:22:19,253 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 17 places, 18 transitions, 41 flow [2022-10-17 17:22:19,271 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 47 states, 44 states have (on average 2.2045454545454546) internal successors, (97), 46 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:22:19,295 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 17:22:19,303 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;@99ff3ab, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 17:22:19,304 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-10-17 17:22:19,306 INFO L276 IsEmpty]: Start isEmpty. Operand has 47 states, 44 states have (on average 2.2045454545454546) internal successors, (97), 46 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:22:19,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-10-17 17:22:19,311 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:22:19,311 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2022-10-17 17:22:19,312 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:22:19,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:22:19,320 INFO L85 PathProgramCache]: Analyzing trace with hash 396191040, now seen corresponding path program 1 times [2022-10-17 17:22:19,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:22:19,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307378637] [2022-10-17 17:22:19,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:22:19,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:22:19,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-10-17 17:22:19,479 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-10-17 17:22:19,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-10-17 17:22:19,517 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-10-17 17:22:19,520 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-10-17 17:22:19,521 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2022-10-17 17:22:19,523 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2022-10-17 17:22:19,523 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2022-10-17 17:22:19,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 17:22:19,526 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-10-17 17:22:19,529 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-10-17 17:22:19,529 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-10-17 17:22:19,581 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-10-17 17:22:19,589 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-10-17 17:22:19,590 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 142 places, 154 transitions, 320 flow [2022-10-17 17:22:19,591 INFO L112 LiptonReduction]: Starting Lipton reduction on Petri net that has 142 places, 154 transitions, 320 flow [2022-10-17 17:22:19,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 142 places, 154 transitions, 320 flow [2022-10-17 17:22:19,666 INFO L130 PetriNetUnfolder]: 19/178 cut-off events. [2022-10-17 17:22:19,666 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-10-17 17:22:19,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 188 conditions, 178 events. 19/178 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 342 event pairs, 0 based on Foata normal form. 0/154 useless extension candidates. Maximal degree in co-relation 127. Up to 6 conditions per place. [2022-10-17 17:22:19,679 INFO L118 LiptonReduction]: Number of co-enabled transitions 9804 [2022-10-17 17:22:23,541 INFO L133 LiptonReduction]: Checked pairs total: 11208 [2022-10-17 17:22:23,542 INFO L135 LiptonReduction]: Total number of compositions: 149 [2022-10-17 17:22:23,543 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 29 places, 32 transitions, 76 flow [2022-10-17 17:22:23,600 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 532 states, 524 states have (on average 3.4427480916030535) internal successors, (1804), 531 states have internal predecessors, (1804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:22:23,601 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 17:22:23,602 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;@99ff3ab, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 17:22:23,603 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-10-17 17:22:23,606 INFO L276 IsEmpty]: Start isEmpty. Operand has 532 states, 524 states have (on average 3.4427480916030535) internal successors, (1804), 531 states have internal predecessors, (1804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:22:23,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-10-17 17:22:23,607 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:22:23,607 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:22:23,608 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-10-17 17:22:23,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:22:23,608 INFO L85 PathProgramCache]: Analyzing trace with hash 792005209, now seen corresponding path program 1 times [2022-10-17 17:22:23,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:22:23,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767417140] [2022-10-17 17:22:23,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:22:23,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:22:23,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:22:23,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:22:23,705 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:22:23,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767417140] [2022-10-17 17:22:23,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767417140] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:22:23,706 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:22:23,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 17:22:23,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152117970] [2022-10-17 17:22:23,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:22:23,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-10-17 17:22:23,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:22:23,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-10-17 17:22:23,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-17 17:22:23,737 INFO L87 Difference]: Start difference. First operand has 532 states, 524 states have (on average 3.4427480916030535) internal successors, (1804), 531 states have internal predecessors, (1804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:22:23,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:22:23,833 INFO L93 Difference]: Finished difference Result 444 states and 1397 transitions. [2022-10-17 17:22:23,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-17 17:22:23,836 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-10-17 17:22:23,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:22:23,857 INFO L225 Difference]: With dead ends: 444 [2022-10-17 17:22:23,858 INFO L226 Difference]: Without dead ends: 444 [2022-10-17 17:22:23,858 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-17 17:22:23,862 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 17:22:23,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 4 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 17:22:23,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2022-10-17 17:22:23,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 444. [2022-10-17 17:22:23,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 440 states have (on average 3.175) internal successors, (1397), 443 states have internal predecessors, (1397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:22:23,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 1397 transitions. [2022-10-17 17:22:23,947 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 1397 transitions. Word has length 7 [2022-10-17 17:22:23,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:22:23,947 INFO L495 AbstractCegarLoop]: Abstraction has 444 states and 1397 transitions. [2022-10-17 17:22:23,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:22:23,948 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 1397 transitions. [2022-10-17 17:22:23,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-10-17 17:22:23,948 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:22:23,949 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:22:23,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 17:22:23,949 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-10-17 17:22:23,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:22:23,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1217630069, now seen corresponding path program 1 times [2022-10-17 17:22:23,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:22:23,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877456313] [2022-10-17 17:22:23,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:22:23,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:22:24,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:22:24,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:22:24,216 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:22:24,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877456313] [2022-10-17 17:22:24,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877456313] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:22:24,217 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:22:24,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:22:24,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379887055] [2022-10-17 17:22:24,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:22:24,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 17:22:24,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:22:24,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 17:22:24,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:22:24,218 INFO L87 Difference]: Start difference. First operand 444 states and 1397 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:22:24,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:22:24,405 INFO L93 Difference]: Finished difference Result 732 states and 2295 transitions. [2022-10-17 17:22:24,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 17:22:24,406 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-10-17 17:22:24,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:22:24,416 INFO L225 Difference]: With dead ends: 732 [2022-10-17 17:22:24,416 INFO L226 Difference]: Without dead ends: 732 [2022-10-17 17:22:24,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:22:24,418 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 44 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 17:22:24,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 24 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 17:22:24,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2022-10-17 17:22:24,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 539. [2022-10-17 17:22:24,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 535 states have (on average 3.2242990654205608) internal successors, (1725), 538 states have internal predecessors, (1725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:22:24,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 1725 transitions. [2022-10-17 17:22:24,463 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 1725 transitions. Word has length 8 [2022-10-17 17:22:24,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:22:24,463 INFO L495 AbstractCegarLoop]: Abstraction has 539 states and 1725 transitions. [2022-10-17 17:22:24,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:22:24,464 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 1725 transitions. [2022-10-17 17:22:24,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-10-17 17:22:24,465 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:22:24,465 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:22:24,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-17 17:22:24,466 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-10-17 17:22:24,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:22:24,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1911868346, now seen corresponding path program 1 times [2022-10-17 17:22:24,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:22:24,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670801984] [2022-10-17 17:22:24,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:22:24,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:22:24,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:22:25,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:22:25,156 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:22:25,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670801984] [2022-10-17 17:22:25,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670801984] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:22:25,161 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:22:25,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-10-17 17:22:25,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526762318] [2022-10-17 17:22:25,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:22:25,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-10-17 17:22:25,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:22:25,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-10-17 17:22:25,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-10-17 17:22:25,164 INFO L87 Difference]: Start difference. First operand 539 states and 1725 transitions. Second operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:22:25,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:22:25,981 INFO L93 Difference]: Finished difference Result 1618 states and 5196 transitions. [2022-10-17 17:22:25,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-10-17 17:22:25,981 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-10-17 17:22:25,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:22:25,998 INFO L225 Difference]: With dead ends: 1618 [2022-10-17 17:22:25,999 INFO L226 Difference]: Without dead ends: 1618 [2022-10-17 17:22:26,000 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=187, Invalid=463, Unknown=0, NotChecked=0, Total=650 [2022-10-17 17:22:26,005 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 212 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-10-17 17:22:26,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 115 Invalid, 604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 558 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-10-17 17:22:26,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1618 states. [2022-10-17 17:22:26,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1618 to 822. [2022-10-17 17:22:26,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 822 states, 818 states have (on average 3.2640586797066016) internal successors, (2670), 821 states have internal predecessors, (2670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:22:26,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 822 states to 822 states and 2670 transitions. [2022-10-17 17:22:26,067 INFO L78 Accepts]: Start accepts. Automaton has 822 states and 2670 transitions. Word has length 10 [2022-10-17 17:22:26,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:22:26,067 INFO L495 AbstractCegarLoop]: Abstraction has 822 states and 2670 transitions. [2022-10-17 17:22:26,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:22:26,068 INFO L276 IsEmpty]: Start isEmpty. Operand 822 states and 2670 transitions. [2022-10-17 17:22:26,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-10-17 17:22:26,070 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:22:26,070 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-10-17 17:22:26,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-17 17:22:26,076 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-10-17 17:22:26,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:22:26,077 INFO L85 PathProgramCache]: Analyzing trace with hash 479651705, now seen corresponding path program 1 times [2022-10-17 17:22:26,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:22:26,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17026823] [2022-10-17 17:22:26,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:22:26,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:22:26,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-10-17 17:22:26,096 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-10-17 17:22:26,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-10-17 17:22:26,125 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-10-17 17:22:26,125 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-10-17 17:22:26,125 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-10-17 17:22:26,126 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-10-17 17:22:26,128 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-10-17 17:22:26,128 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-10-17 17:22:26,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-10-17 17:22:26,129 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-10-17 17:22:26,130 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-10-17 17:22:26,130 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-10-17 17:22:26,180 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-10-17 17:22:26,184 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-10-17 17:22:26,185 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 194 places, 212 transitions, 445 flow [2022-10-17 17:22:26,191 INFO L112 LiptonReduction]: Starting Lipton reduction on Petri net that has 194 places, 212 transitions, 445 flow [2022-10-17 17:22:26,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 194 places, 212 transitions, 445 flow [2022-10-17 17:22:26,270 INFO L130 PetriNetUnfolder]: 28/249 cut-off events. [2022-10-17 17:22:26,271 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-10-17 17:22:26,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 265 conditions, 249 events. 28/249 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 642 event pairs, 0 based on Foata normal form. 0/214 useless extension candidates. Maximal degree in co-relation 184. Up to 8 conditions per place. [2022-10-17 17:22:26,292 INFO L118 LiptonReduction]: Number of co-enabled transitions 24624 [2022-10-17 17:22:31,060 INFO L133 LiptonReduction]: Checked pairs total: 27484 [2022-10-17 17:22:31,060 INFO L135 LiptonReduction]: Total number of compositions: 213 [2022-10-17 17:22:31,061 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 40 places, 45 transitions, 111 flow [2022-10-17 17:22:31,313 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 4824 states, 4805 states have (on average 4.729448491155047) internal successors, (22725), 4823 states have internal predecessors, (22725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:22:31,314 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 17:22:31,315 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;@99ff3ab, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 17:22:31,316 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-10-17 17:22:31,345 INFO L276 IsEmpty]: Start isEmpty. Operand has 4824 states, 4805 states have (on average 4.729448491155047) internal successors, (22725), 4823 states have internal predecessors, (22725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:22:31,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-10-17 17:22:31,354 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:22:31,354 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:22:31,355 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-10-17 17:22:31,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:22:31,355 INFO L85 PathProgramCache]: Analyzing trace with hash 244205271, now seen corresponding path program 1 times [2022-10-17 17:22:31,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:22:31,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491312390] [2022-10-17 17:22:31,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:22:31,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:22:31,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:22:31,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:22:31,384 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:22:31,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491312390] [2022-10-17 17:22:31,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491312390] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:22:31,385 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:22:31,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 17:22:31,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992022883] [2022-10-17 17:22:31,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:22:31,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-10-17 17:22:31,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:22:31,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-10-17 17:22:31,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-17 17:22:31,405 INFO L87 Difference]: Start difference. First operand has 4824 states, 4805 states have (on average 4.729448491155047) internal successors, (22725), 4823 states have internal predecessors, (22725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:22:31,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:22:31,523 INFO L93 Difference]: Finished difference Result 4008 states and 17480 transitions. [2022-10-17 17:22:31,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-17 17:22:31,524 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-10-17 17:22:31,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:22:31,575 INFO L225 Difference]: With dead ends: 4008 [2022-10-17 17:22:31,575 INFO L226 Difference]: Without dead ends: 4008 [2022-10-17 17:22:31,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-17 17:22:31,578 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 17:22:31,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 4 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 17:22:31,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4008 states. [2022-10-17 17:22:31,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4008 to 4008. [2022-10-17 17:22:31,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4008 states, 4000 states have (on average 4.37) internal successors, (17480), 4007 states have internal predecessors, (17480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:22:31,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4008 states to 4008 states and 17480 transitions. [2022-10-17 17:22:31,850 INFO L78 Accepts]: Start accepts. Automaton has 4008 states and 17480 transitions. Word has length 7 [2022-10-17 17:22:31,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:22:31,850 INFO L495 AbstractCegarLoop]: Abstraction has 4008 states and 17480 transitions. [2022-10-17 17:22:31,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:22:31,850 INFO L276 IsEmpty]: Start isEmpty. Operand 4008 states and 17480 transitions. [2022-10-17 17:22:31,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-10-17 17:22:31,851 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:22:31,851 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:22:31,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-10-17 17:22:31,851 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-10-17 17:22:31,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:22:31,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1019545120, now seen corresponding path program 1 times [2022-10-17 17:22:31,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:22:31,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300637342] [2022-10-17 17:22:31,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:22:31,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:22:31,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:22:31,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:22:31,904 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:22:31,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300637342] [2022-10-17 17:22:31,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300637342] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:22:31,905 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:22:31,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:22:31,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91057002] [2022-10-17 17:22:31,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:22:31,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 17:22:31,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:22:31,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 17:22:31,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:22:31,906 INFO L87 Difference]: Start difference. First operand 4008 states and 17480 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:22:32,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:22:32,362 INFO L93 Difference]: Finished difference Result 6672 states and 28968 transitions. [2022-10-17 17:22:32,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 17:22:32,362 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-10-17 17:22:32,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:22:32,463 INFO L225 Difference]: With dead ends: 6672 [2022-10-17 17:22:32,464 INFO L226 Difference]: Without dead ends: 6672 [2022-10-17 17:22:32,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:22:32,465 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 75 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-17 17:22:32,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 22 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-17 17:22:32,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6672 states. [2022-10-17 17:22:32,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6672 to 4895. [2022-10-17 17:22:32,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4895 states, 4887 states have (on average 4.420298751790464) internal successors, (21602), 4894 states have internal predecessors, (21602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:22:32,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4895 states to 4895 states and 21602 transitions. [2022-10-17 17:22:32,813 INFO L78 Accepts]: Start accepts. Automaton has 4895 states and 21602 transitions. Word has length 8 [2022-10-17 17:22:32,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:22:32,813 INFO L495 AbstractCegarLoop]: Abstraction has 4895 states and 21602 transitions. [2022-10-17 17:22:32,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:22:32,813 INFO L276 IsEmpty]: Start isEmpty. Operand 4895 states and 21602 transitions. [2022-10-17 17:22:32,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-10-17 17:22:32,818 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:22:32,818 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:22:32,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-10-17 17:22:32,819 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-10-17 17:22:32,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:22:32,819 INFO L85 PathProgramCache]: Analyzing trace with hash -531207152, now seen corresponding path program 1 times [2022-10-17 17:22:32,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:22:32,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022273689] [2022-10-17 17:22:32,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:22:32,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:22:32,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:22:33,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:22:33,353 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:22:33,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022273689] [2022-10-17 17:22:33,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022273689] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:22:33,353 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:22:33,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-10-17 17:22:33,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590710129] [2022-10-17 17:22:33,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:22:33,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-10-17 17:22:33,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:22:33,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-10-17 17:22:33,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-10-17 17:22:33,357 INFO L87 Difference]: Start difference. First operand 4895 states and 21602 transitions. Second operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:22:34,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:22:34,918 INFO L93 Difference]: Finished difference Result 14465 states and 63241 transitions. [2022-10-17 17:22:34,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-10-17 17:22:34,919 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-10-17 17:22:34,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:22:35,077 INFO L225 Difference]: With dead ends: 14465 [2022-10-17 17:22:35,078 INFO L226 Difference]: Without dead ends: 14465 [2022-10-17 17:22:35,078 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=187, Invalid=463, Unknown=0, NotChecked=0, Total=650 [2022-10-17 17:22:35,079 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 487 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 1200 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 487 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 1269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:22:35,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [487 Valid, 115 Invalid, 1269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1200 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-10-17 17:22:35,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14465 states. [2022-10-17 17:22:35,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14465 to 7811. [2022-10-17 17:22:35,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7811 states, 7803 states have (on average 4.391003460207613) internal successors, (34263), 7810 states have internal predecessors, (34263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:22:35,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7811 states to 7811 states and 34263 transitions. [2022-10-17 17:22:35,705 INFO L78 Accepts]: Start accepts. Automaton has 7811 states and 34263 transitions. Word has length 10 [2022-10-17 17:22:35,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:22:35,705 INFO L495 AbstractCegarLoop]: Abstraction has 7811 states and 34263 transitions. [2022-10-17 17:22:35,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:22:35,706 INFO L276 IsEmpty]: Start isEmpty. Operand 7811 states and 34263 transitions. [2022-10-17 17:22:35,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-10-17 17:22:35,707 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:22:35,708 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:22:35,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-10-17 17:22:35,708 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-10-17 17:22:35,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:22:35,709 INFO L85 PathProgramCache]: Analyzing trace with hash 486869446, now seen corresponding path program 1 times [2022-10-17 17:22:35,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:22:35,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579677644] [2022-10-17 17:22:35,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:22:35,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:22:35,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:22:35,833 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:22:35,833 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:22:35,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579677644] [2022-10-17 17:22:35,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579677644] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:22:35,834 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:22:35,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 17:22:35,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790366842] [2022-10-17 17:22:35,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:22:35,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 17:22:35,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:22:35,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 17:22:35,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-10-17 17:22:35,836 INFO L87 Difference]: Start difference. First operand 7811 states and 34263 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:22:36,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:22:36,206 INFO L93 Difference]: Finished difference Result 11620 states and 50086 transitions. [2022-10-17 17:22:36,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 17:22:36,206 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-10-17 17:22:36,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:22:36,282 INFO L225 Difference]: With dead ends: 11620 [2022-10-17 17:22:36,282 INFO L226 Difference]: Without dead ends: 11620 [2022-10-17 17:22:36,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-10-17 17:22:36,285 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 137 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 17:22:36,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 21 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 17:22:36,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11620 states. [2022-10-17 17:22:36,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11620 to 8175. [2022-10-17 17:22:36,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8175 states, 8167 states have (on average 4.424390841190156) internal successors, (36134), 8174 states have internal predecessors, (36134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:22:36,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8175 states to 8175 states and 36134 transitions. [2022-10-17 17:22:36,890 INFO L78 Accepts]: Start accepts. Automaton has 8175 states and 36134 transitions. Word has length 11 [2022-10-17 17:22:36,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:22:36,891 INFO L495 AbstractCegarLoop]: Abstraction has 8175 states and 36134 transitions. [2022-10-17 17:22:36,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:22:36,891 INFO L276 IsEmpty]: Start isEmpty. Operand 8175 states and 36134 transitions. [2022-10-17 17:22:36,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-10-17 17:22:36,892 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:22:36,892 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:22:36,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-10-17 17:22:36,893 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-10-17 17:22:36,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:22:36,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1528739003, now seen corresponding path program 1 times [2022-10-17 17:22:36,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:22:36,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113380522] [2022-10-17 17:22:36,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:22:36,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:22:36,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:22:36,958 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-17 17:22:36,958 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:22:36,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113380522] [2022-10-17 17:22:36,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113380522] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:22:36,959 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:22:36,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:22:36,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54001955] [2022-10-17 17:22:36,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:22:36,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 17:22:36,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:22:36,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 17:22:36,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:22:36,961 INFO L87 Difference]: Start difference. First operand 8175 states and 36134 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:22:37,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:22:37,367 INFO L93 Difference]: Finished difference Result 13499 states and 59487 transitions. [2022-10-17 17:22:37,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 17:22:37,367 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-10-17 17:22:37,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:22:37,442 INFO L225 Difference]: With dead ends: 13499 [2022-10-17 17:22:37,442 INFO L226 Difference]: Without dead ends: 13499 [2022-10-17 17:22:37,442 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:22:37,443 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 78 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-17 17:22:37,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 23 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-17 17:22:37,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13499 states. [2022-10-17 17:22:37,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13499 to 9879. [2022-10-17 17:22:37,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9879 states, 9871 states have (on average 4.480498429743694) internal successors, (44227), 9878 states have internal predecessors, (44227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:22:38,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9879 states to 9879 states and 44227 transitions. [2022-10-17 17:22:38,017 INFO L78 Accepts]: Start accepts. Automaton has 9879 states and 44227 transitions. Word has length 12 [2022-10-17 17:22:38,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:22:38,018 INFO L495 AbstractCegarLoop]: Abstraction has 9879 states and 44227 transitions. [2022-10-17 17:22:38,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:22:38,019 INFO L276 IsEmpty]: Start isEmpty. Operand 9879 states and 44227 transitions. [2022-10-17 17:22:38,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-10-17 17:22:38,020 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:22:38,020 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:22:38,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-10-17 17:22:38,020 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-10-17 17:22:38,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:22:38,020 INFO L85 PathProgramCache]: Analyzing trace with hash -352117408, now seen corresponding path program 1 times [2022-10-17 17:22:38,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:22:38,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805754278] [2022-10-17 17:22:38,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:22:38,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:22:38,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:22:38,561 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:22:38,562 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:22:38,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805754278] [2022-10-17 17:22:38,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805754278] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:22:38,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329104025] [2022-10-17 17:22:38,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:22:38,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:22:38,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f3555b-2426-4daf-b46e-02397f387ce3/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:22:38,568 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f3555b-2426-4daf-b46e-02397f387ce3/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:22:38,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f3555b-2426-4daf-b46e-02397f387ce3/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 17:22:38,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:22:38,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 48 conjunts are in the unsatisfiable core [2022-10-17 17:22:38,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:22:38,742 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-10-17 17:22:38,742 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-10-17 17:22:38,826 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-10-17 17:22:38,827 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-10-17 17:22:38,921 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-10-17 17:22:38,926 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-10-17 17:22:38,956 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-10-17 17:22:38,983 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-10-17 17:22:38,993 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:22:38,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:22:39,018 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_122 (Array Int Int))) (< |c_thr1Thread1of3ForFork0_findMax_~e~0#1| (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t~0#1.base| v_ArrVal_122) |c_~#max~0.base|) |c_~#max~0.offset|) 1))) is different from false [2022-10-17 17:22:39,063 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_~#max~0.base|))) (and (= |c_thr1Thread1of3ForFork0_findMax_~c~0#1| (select .cse0 |c_~#max~0.offset|)) (forall ((|thr1Thread1of3ForFork0_findMax_~e~0#1| Int) (v_ArrVal_122 (Array Int Int)) (v_ArrVal_121 (Array Int Int))) (< |thr1Thread1of3ForFork0_findMax_~e~0#1| (+ (select (select (store (store (store |c_#memory_int| |c_~#max~0.base| (store .cse0 |c_~#max~0.offset| |thr1Thread1of3ForFork0_findMax_~e~0#1|)) |c_thr1Thread1of3ForFork0_findMax_~#cret~0#1.base| v_ArrVal_121) |c_ULTIMATE.start_main_~#t~0#1.base| v_ArrVal_122) |c_~#max~0.base|) |c_~#max~0.offset|) 1))))) is different from false [2022-10-17 17:22:39,072 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-17 17:22:39,072 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-10-17 17:22:39,077 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 50 [2022-10-17 17:22:39,081 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2022-10-17 17:22:39,085 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2022-10-17 17:22:39,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-10-17 17:22:39,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329104025] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:22:39,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [204851783] [2022-10-17 17:22:39,188 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-10-17 17:22:39,190 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 17:22:39,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2022-10-17 17:22:39,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426861733] [2022-10-17 17:22:39,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 17:22:39,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-10-17 17:22:39,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:22:39,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-10-17 17:22:39,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=222, Unknown=2, NotChecked=62, Total=342 [2022-10-17 17:22:39,192 INFO L87 Difference]: Start difference. First operand 9879 states and 44227 transitions. Second operand has 19 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:22:40,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:22:40,598 INFO L93 Difference]: Finished difference Result 27773 states and 125333 transitions. [2022-10-17 17:22:40,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-10-17 17:22:40,599 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-10-17 17:22:40,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:22:40,940 INFO L225 Difference]: With dead ends: 27773 [2022-10-17 17:22:40,941 INFO L226 Difference]: Without dead ends: 27773 [2022-10-17 17:22:40,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 2 IntricatePredicates, 1 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=149, Invalid=507, Unknown=2, NotChecked=98, Total=756 [2022-10-17 17:22:40,942 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 450 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 1058 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 450 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 1684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1058 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 589 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-10-17 17:22:40,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [450 Valid, 126 Invalid, 1684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1058 Invalid, 0 Unknown, 589 Unchecked, 0.8s Time] [2022-10-17 17:22:40,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27773 states. [2022-10-17 17:22:41,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27773 to 14985. [2022-10-17 17:22:41,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14985 states, 14977 states have (on average 4.627295185951793) internal successors, (69303), 14984 states have internal predecessors, (69303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:22:41,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14985 states to 14985 states and 69303 transitions. [2022-10-17 17:22:41,955 INFO L78 Accepts]: Start accepts. Automaton has 14985 states and 69303 transitions. Word has length 13 [2022-10-17 17:22:41,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:22:41,956 INFO L495 AbstractCegarLoop]: Abstraction has 14985 states and 69303 transitions. [2022-10-17 17:22:41,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:22:41,956 INFO L276 IsEmpty]: Start isEmpty. Operand 14985 states and 69303 transitions. [2022-10-17 17:22:41,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-10-17 17:22:41,958 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:22:41,958 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:22:42,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f3555b-2426-4daf-b46e-02397f387ce3/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-17 17:22:42,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f3555b-2426-4daf-b46e-02397f387ce3/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:22:42,179 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-10-17 17:22:42,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:22:42,180 INFO L85 PathProgramCache]: Analyzing trace with hash 239191986, now seen corresponding path program 1 times [2022-10-17 17:22:42,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:22:42,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038375698] [2022-10-17 17:22:42,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:22:42,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:22:42,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat