./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-ext/26_stack_cas_longest-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f3f296-f5c4-494a-baf7-dd42b9825564/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f3f296-f5c4-494a-baf7-dd42b9825564/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f3f296-f5c4-494a-baf7-dd42b9825564/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f3f296-f5c4-494a-baf7-dd42b9825564/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread-ext/26_stack_cas_longest-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f3f296-f5c4-494a-baf7-dd42b9825564/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f3f296-f5c4-494a-baf7-dd42b9825564/bin/utaipan-gh47qXpMRh --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 8c0827ac193c1e2b03d5ccf1e60b62c7d6ff1b4feade2c409a6c7ca2cebf9412 --- 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-2329fc7 [2022-12-14 12:15:41,955 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 12:15:41,957 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 12:15:41,974 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 12:15:41,974 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 12:15:41,975 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 12:15:41,991 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 12:15:41,993 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 12:15:41,995 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 12:15:41,996 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 12:15:41,997 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 12:15:41,998 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 12:15:41,998 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 12:15:41,999 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 12:15:42,000 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 12:15:42,001 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 12:15:42,002 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 12:15:42,003 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 12:15:42,005 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 12:15:42,006 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 12:15:42,008 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 12:15:42,009 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 12:15:42,010 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 12:15:42,011 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 12:15:42,015 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 12:15:42,015 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 12:15:42,015 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 12:15:42,016 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 12:15:42,017 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 12:15:42,018 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 12:15:42,018 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 12:15:42,019 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 12:15:42,019 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 12:15:42,020 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 12:15:42,021 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 12:15:42,022 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 12:15:42,022 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 12:15:42,022 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 12:15:42,022 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 12:15:42,023 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 12:15:42,023 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 12:15:42,024 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f3f296-f5c4-494a-baf7-dd42b9825564/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 12:15:42,048 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 12:15:42,048 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 12:15:42,049 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 12:15:42,049 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 12:15:42,049 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 12:15:42,049 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 12:15:42,050 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 12:15:42,050 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 12:15:42,050 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 12:15:42,050 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 12:15:42,050 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 12:15:42,050 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 12:15:42,051 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 12:15:42,051 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 12:15:42,051 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 12:15:42,051 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 12:15:42,051 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 12:15:42,051 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 12:15:42,052 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 12:15:42,052 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 12:15:42,052 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 12:15:42,052 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 12:15:42,053 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 12:15:42,053 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 12:15:42,053 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 12:15:42,053 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 12:15:42,053 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 12:15:42,053 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 12:15:42,053 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 12:15:42,053 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 12:15:42,054 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 12:15:42,054 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 12:15:42,054 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 12:15:42,054 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 12:15:42,054 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 12:15:42,054 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 12:15:42,054 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 12:15:42,054 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 12:15:42,055 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 12:15:42,055 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 12:15:42,055 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 12:15:42,055 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_63f3f296-f5c4-494a-baf7-dd42b9825564/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f3f296-f5c4-494a-baf7-dd42b9825564/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8c0827ac193c1e2b03d5ccf1e60b62c7d6ff1b4feade2c409a6c7ca2cebf9412 [2022-12-14 12:15:42,236 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 12:15:42,253 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 12:15:42,255 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 12:15:42,256 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 12:15:42,256 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 12:15:42,257 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f3f296-f5c4-494a-baf7-dd42b9825564/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/pthread-ext/26_stack_cas_longest-1.i [2022-12-14 12:15:44,968 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 12:15:45,138 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 12:15:45,138 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f3f296-f5c4-494a-baf7-dd42b9825564/sv-benchmarks/c/pthread-ext/26_stack_cas_longest-1.i [2022-12-14 12:15:45,148 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f3f296-f5c4-494a-baf7-dd42b9825564/bin/utaipan-gh47qXpMRh/data/7956f43a5/135feccdab24426d97dd07b332523424/FLAG2b2a565fc [2022-12-14 12:15:45,159 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f3f296-f5c4-494a-baf7-dd42b9825564/bin/utaipan-gh47qXpMRh/data/7956f43a5/135feccdab24426d97dd07b332523424 [2022-12-14 12:15:45,161 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 12:15:45,162 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 12:15:45,162 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 12:15:45,163 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 12:15:45,165 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 12:15:45,166 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 12:15:45" (1/1) ... [2022-12-14 12:15:45,166 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a6fac6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:15:45, skipping insertion in model container [2022-12-14 12:15:45,166 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 12:15:45" (1/1) ... [2022-12-14 12:15:45,172 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 12:15:45,196 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 12:15:45,412 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f3f296-f5c4-494a-baf7-dd42b9825564/sv-benchmarks/c/pthread-ext/26_stack_cas_longest-1.i[31167,31180] [2022-12-14 12:15:45,421 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 12:15:45,429 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 12:15:45,469 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f3f296-f5c4-494a-baf7-dd42b9825564/sv-benchmarks/c/pthread-ext/26_stack_cas_longest-1.i[31167,31180] [2022-12-14 12:15:45,472 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 12:15:45,512 INFO L208 MainTranslator]: Completed translation [2022-12-14 12:15:45,513 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:15:45 WrapperNode [2022-12-14 12:15:45,513 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 12:15:45,514 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 12:15:45,514 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 12:15:45,514 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 12:15:45,520 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:15:45" (1/1) ... [2022-12-14 12:15:45,534 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:15:45" (1/1) ... [2022-12-14 12:15:45,554 INFO L138 Inliner]: procedures = 177, calls = 47, calls flagged for inlining = 16, calls inlined = 19, statements flattened = 187 [2022-12-14 12:15:45,555 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 12:15:45,555 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 12:15:45,555 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 12:15:45,555 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 12:15:45,562 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:15:45" (1/1) ... [2022-12-14 12:15:45,562 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:15:45" (1/1) ... [2022-12-14 12:15:45,564 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:15:45" (1/1) ... [2022-12-14 12:15:45,565 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:15:45" (1/1) ... [2022-12-14 12:15:45,569 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:15:45" (1/1) ... [2022-12-14 12:15:45,571 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:15:45" (1/1) ... [2022-12-14 12:15:45,573 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:15:45" (1/1) ... [2022-12-14 12:15:45,574 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:15:45" (1/1) ... [2022-12-14 12:15:45,576 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 12:15:45,577 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 12:15:45,577 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 12:15:45,577 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 12:15:45,577 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:15:45" (1/1) ... [2022-12-14 12:15:45,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 12:15:45,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f3f296-f5c4-494a-baf7-dd42b9825564/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:15:45,606 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f3f296-f5c4-494a-baf7-dd42b9825564/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 12:15:45,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f3f296-f5c4-494a-baf7-dd42b9825564/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 12:15:45,641 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 12:15:45,641 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-12-14 12:15:45,641 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-12-14 12:15:45,641 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 12:15:45,641 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 12:15:45,641 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 12:15:45,641 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 12:15:45,641 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 12:15:45,641 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 12:15:45,641 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 12:15:45,642 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-14 12:15:45,749 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 12:15:45,751 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 12:15:46,005 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 12:15:46,097 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 12:15:46,097 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-14 12:15:46,099 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 12:15:46 BoogieIcfgContainer [2022-12-14 12:15:46,099 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 12:15:46,101 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 12:15:46,101 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 12:15:46,103 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 12:15:46,104 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 12:15:45" (1/3) ... [2022-12-14 12:15:46,104 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25e5a06e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 12:15:46, skipping insertion in model container [2022-12-14 12:15:46,104 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:15:45" (2/3) ... [2022-12-14 12:15:46,104 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25e5a06e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 12:15:46, skipping insertion in model container [2022-12-14 12:15:46,104 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 12:15:46" (3/3) ... [2022-12-14 12:15:46,106 INFO L112 eAbstractionObserver]: Analyzing ICFG 26_stack_cas_longest-1.i [2022-12-14 12:15:46,112 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-14 12:15:46,119 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 12:15:46,120 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 12:15:46,120 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-14 12:15:46,177 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-14 12:15:46,201 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-14 12:15:46,212 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 117 places, 124 transitions, 253 flow [2022-12-14 12:15:46,214 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 117 places, 124 transitions, 253 flow [2022-12-14 12:15:46,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 117 places, 124 transitions, 253 flow [2022-12-14 12:15:46,254 INFO L130 PetriNetUnfolder]: 11/135 cut-off events. [2022-12-14 12:15:46,254 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-14 12:15:46,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140 conditions, 135 events. 11/135 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 144 event pairs, 0 based on Foata normal form. 0/121 useless extension candidates. Maximal degree in co-relation 97. Up to 4 conditions per place. [2022-12-14 12:15:46,260 INFO L119 LiptonReduction]: Number of co-enabled transitions 2352 [2022-12-14 12:15:49,764 INFO L134 LiptonReduction]: Checked pairs total: 2314 [2022-12-14 12:15:49,764 INFO L136 LiptonReduction]: Total number of compositions: 116 [2022-12-14 12:15:49,770 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 22 places, 26 transitions, 57 flow [2022-12-14 12:15:49,781 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 72 states, 69 states have (on average 2.260869565217391) internal successors, (156), 71 states have internal predecessors, (156), 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) [2022-12-14 12:15:49,793 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 12:15:49,797 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;@4049ff29, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 12:15:49,797 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-12-14 12:15:49,799 INFO L276 IsEmpty]: Start isEmpty. Operand has 72 states, 69 states have (on average 2.260869565217391) internal successors, (156), 71 states have internal predecessors, (156), 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) [2022-12-14 12:15:49,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 12:15:49,803 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:15:49,803 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2022-12-14 12:15:49,803 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:15:49,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:15:49,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1876322815, now seen corresponding path program 1 times [2022-12-14 12:15:49,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:15:49,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989636436] [2022-12-14 12:15:49,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:15:49,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:15:49,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 12:15:49,903 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-14 12:15:49,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 12:15:49,937 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-12-14 12:15:49,938 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-14 12:15:49,939 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2022-12-14 12:15:49,941 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2022-12-14 12:15:49,941 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2022-12-14 12:15:49,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 12:15:49,944 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2022-12-14 12:15:49,946 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-14 12:15:49,947 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-12-14 12:15:49,990 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-14 12:15:49,995 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-14 12:15:49,995 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 195 places, 209 transitions, 430 flow [2022-12-14 12:15:49,995 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 195 places, 209 transitions, 430 flow [2022-12-14 12:15:49,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 195 places, 209 transitions, 430 flow [2022-12-14 12:15:50,046 INFO L130 PetriNetUnfolder]: 21/233 cut-off events. [2022-12-14 12:15:50,046 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-14 12:15:50,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 243 conditions, 233 events. 21/233 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 470 event pairs, 0 based on Foata normal form. 0/207 useless extension candidates. Maximal degree in co-relation 181. Up to 6 conditions per place. [2022-12-14 12:15:50,058 INFO L119 LiptonReduction]: Number of co-enabled transitions 18984 [2022-12-14 12:16:01,595 INFO L134 LiptonReduction]: Checked pairs total: 32023 [2022-12-14 12:16:01,595 INFO L136 LiptonReduction]: Total number of compositions: 182 [2022-12-14 12:16:01,597 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 55 places, 64 transitions, 140 flow [2022-12-14 12:16:01,664 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 3015 states, 3007 states have (on average 3.344529431326904) internal successors, (10057), 3014 states have internal predecessors, (10057), 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) [2022-12-14 12:16:01,665 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 12:16:01,666 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;@4049ff29, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 12:16:01,666 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-12-14 12:16:01,673 INFO L276 IsEmpty]: Start isEmpty. Operand has 3015 states, 3007 states have (on average 3.344529431326904) internal successors, (10057), 3014 states have internal predecessors, (10057), 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) [2022-12-14 12:16:01,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 12:16:01,676 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:16:01,676 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-12-14 12:16:01,676 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-12-14 12:16:01,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:16:01,677 INFO L85 PathProgramCache]: Analyzing trace with hash 76347402, now seen corresponding path program 1 times [2022-12-14 12:16:01,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:16:01,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718357562] [2022-12-14 12:16:01,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:16:01,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:16:01,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 12:16:01,698 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-14 12:16:01,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 12:16:01,719 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-12-14 12:16:01,719 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-14 12:16:01,720 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-12-14 12:16:01,720 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-12-14 12:16:01,720 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-12-14 12:16:01,720 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-12-14 12:16:01,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 12:16:01,721 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2022-12-14 12:16:01,721 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-14 12:16:01,721 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-12-14 12:16:01,758 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-14 12:16:01,763 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-14 12:16:01,763 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 273 places, 294 transitions, 609 flow [2022-12-14 12:16:01,763 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 273 places, 294 transitions, 609 flow [2022-12-14 12:16:01,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 273 places, 294 transitions, 609 flow [2022-12-14 12:16:01,835 INFO L130 PetriNetUnfolder]: 31/331 cut-off events. [2022-12-14 12:16:01,835 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-12-14 12:16:01,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 347 conditions, 331 events. 31/331 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 910 event pairs, 0 based on Foata normal form. 0/293 useless extension candidates. Maximal degree in co-relation 265. Up to 8 conditions per place. [2022-12-14 12:16:01,867 INFO L119 LiptonReduction]: Number of co-enabled transitions 49896 [2022-12-14 12:16:24,452 INFO L134 LiptonReduction]: Checked pairs total: 81968 [2022-12-14 12:16:24,452 INFO L136 LiptonReduction]: Total number of compositions: 256 [2022-12-14 12:16:24,453 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 81 places, 95 transitions, 211 flow [2022-12-14 12:16:26,041 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 72588 states, 72569 states have (on average 4.584781380479268) internal successors, (332713), 72587 states have internal predecessors, (332713), 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) [2022-12-14 12:16:26,042 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 12:16:26,043 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;@4049ff29, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 12:16:26,043 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-12-14 12:16:26,179 INFO L276 IsEmpty]: Start isEmpty. Operand has 72588 states, 72569 states have (on average 4.584781380479268) internal successors, (332713), 72587 states have internal predecessors, (332713), 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) [2022-12-14 12:16:26,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-14 12:16:26,183 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:16:26,183 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:16:26,183 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-12-14 12:16:26,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:16:26,184 INFO L85 PathProgramCache]: Analyzing trace with hash -476647963, now seen corresponding path program 1 times [2022-12-14 12:16:26,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:16:26,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531211784] [2022-12-14 12:16:26,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:16:26,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:16:26,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:16:26,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:16:26,304 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:16:26,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531211784] [2022-12-14 12:16:26,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531211784] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:16:26,305 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:16:26,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 12:16:26,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162688158] [2022-12-14 12:16:26,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:16:26,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 12:16:26,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:16:26,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 12:16:26,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 12:16:26,427 INFO L87 Difference]: Start difference. First operand has 72588 states, 72569 states have (on average 4.584781380479268) internal successors, (332713), 72587 states have internal predecessors, (332713), 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 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 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) [2022-12-14 12:16:27,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:16:27,897 INFO L93 Difference]: Finished difference Result 80605 states and 339003 transitions. [2022-12-14 12:16:27,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 12:16:27,899 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 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 [2022-12-14 12:16:27,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:16:28,427 INFO L225 Difference]: With dead ends: 80605 [2022-12-14 12:16:28,427 INFO L226 Difference]: Without dead ends: 80605 [2022-12-14 12:16:28,427 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 [2022-12-14 12:16:28,430 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 221 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 12:16:28,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 59 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 12:16:28,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80605 states. [2022-12-14 12:16:30,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80605 to 67695. [2022-12-14 12:16:30,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67695 states, 67681 states have (on average 4.228291544155671) internal successors, (286175), 67694 states have internal predecessors, (286175), 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) [2022-12-14 12:16:31,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67695 states to 67695 states and 286175 transitions. [2022-12-14 12:16:31,121 INFO L78 Accepts]: Start accepts. Automaton has 67695 states and 286175 transitions. Word has length 13 [2022-12-14 12:16:31,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:16:31,121 INFO L495 AbstractCegarLoop]: Abstraction has 67695 states and 286175 transitions. [2022-12-14 12:16:31,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 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) [2022-12-14 12:16:31,121 INFO L276 IsEmpty]: Start isEmpty. Operand 67695 states and 286175 transitions. [2022-12-14 12:16:31,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 12:16:31,123 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:16:31,123 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:16:31,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 12:16:31,123 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-12-14 12:16:31,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:16:31,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1191400606, now seen corresponding path program 1 times [2022-12-14 12:16:31,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:16:31,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146547569] [2022-12-14 12:16:31,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:16:31,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:16:31,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:16:31,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:16:31,186 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:16:31,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146547569] [2022-12-14 12:16:31,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146547569] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:16:31,186 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:16:31,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 12:16:31,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222239290] [2022-12-14 12:16:31,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:16:31,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:16:31,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:16:31,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:16:31,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:16:31,188 INFO L87 Difference]: Start difference. First operand 67695 states and 286175 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 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) [2022-12-14 12:16:32,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:16:32,030 INFO L93 Difference]: Finished difference Result 80883 states and 337205 transitions. [2022-12-14 12:16:32,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:16:32,031 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 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 14 [2022-12-14 12:16:32,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:16:32,566 INFO L225 Difference]: With dead ends: 80883 [2022-12-14 12:16:32,567 INFO L226 Difference]: Without dead ends: 80883 [2022-12-14 12:16:32,567 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:16:32,568 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 38 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 12:16:32,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 20 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 12:16:32,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80883 states. [2022-12-14 12:16:34,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80883 to 80693. [2022-12-14 12:16:34,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80693 states, 80668 states have (on average 4.173811176674766) internal successors, (336693), 80692 states have internal predecessors, (336693), 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) [2022-12-14 12:16:34,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80693 states to 80693 states and 336693 transitions. [2022-12-14 12:16:34,855 INFO L78 Accepts]: Start accepts. Automaton has 80693 states and 336693 transitions. Word has length 14 [2022-12-14 12:16:34,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:16:34,856 INFO L495 AbstractCegarLoop]: Abstraction has 80693 states and 336693 transitions. [2022-12-14 12:16:34,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 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) [2022-12-14 12:16:34,856 INFO L276 IsEmpty]: Start isEmpty. Operand 80693 states and 336693 transitions. [2022-12-14 12:16:34,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 12:16:34,858 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:16:34,858 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2022-12-14 12:16:34,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 12:16:34,859 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-12-14 12:16:34,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:16:34,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1624852192, now seen corresponding path program 1 times [2022-12-14 12:16:34,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:16:34,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201813094] [2022-12-14 12:16:34,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:16:34,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:16:34,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 12:16:34,875 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-14 12:16:34,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 12:16:34,890 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-12-14 12:16:34,890 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-14 12:16:34,891 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-12-14 12:16:34,891 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-12-14 12:16:34,891 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-12-14 12:16:34,891 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-12-14 12:16:34,891 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-12-14 12:16:34,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 12:16:34,892 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-12-14 12:16:34,892 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-14 12:16:34,892 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-12-14 12:16:34,944 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-14 12:16:34,948 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-14 12:16:34,948 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 351 places, 379 transitions, 790 flow [2022-12-14 12:16:34,948 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 351 places, 379 transitions, 790 flow [2022-12-14 12:16:34,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 351 places, 379 transitions, 790 flow [2022-12-14 12:16:35,016 INFO L130 PetriNetUnfolder]: 41/429 cut-off events. [2022-12-14 12:16:35,016 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-12-14 12:16:35,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 452 conditions, 429 events. 41/429 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1440 event pairs, 0 based on Foata normal form. 0/379 useless extension candidates. Maximal degree in co-relation 349. Up to 10 conditions per place. [2022-12-14 12:16:35,042 INFO L119 LiptonReduction]: Number of co-enabled transitions 95088 [2022-12-14 12:17:03,357 INFO L134 LiptonReduction]: Checked pairs total: 159346 [2022-12-14 12:17:03,357 INFO L136 LiptonReduction]: Total number of compositions: 329 [2022-12-14 12:17:03,358 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 107 places, 126 transitions, 284 flow [2022-12-14 12:17:47,943 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1742640 states, 1742598 states have (on average 5.834932095641106) internal successors, (10167941), 1742639 states have internal predecessors, (10167941), 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) [2022-12-14 12:17:47,944 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 12:17:47,944 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;@4049ff29, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 12:17:47,945 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-12-14 12:17:53,443 INFO L276 IsEmpty]: Start isEmpty. Operand has 1742640 states, 1742598 states have (on average 5.834932095641106) internal successors, (10167941), 1742639 states have internal predecessors, (10167941), 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) [2022-12-14 12:17:53,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-14 12:17:53,444 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:17:53,444 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:17:53,444 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-14 12:17:53,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:17:53,445 INFO L85 PathProgramCache]: Analyzing trace with hash -2028204624, now seen corresponding path program 1 times [2022-12-14 12:17:53,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:17:53,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816619066] [2022-12-14 12:17:53,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:17:53,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:17:53,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:17:53,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:17:53,508 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:17:53,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816619066] [2022-12-14 12:17:53,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816619066] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:17:53,508 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:17:53,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 12:17:53,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958963152] [2022-12-14 12:17:53,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:17:53,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 12:17:53,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:17:53,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 12:17:53,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 12:17:56,571 INFO L87 Difference]: Start difference. First operand has 1742640 states, 1742598 states have (on average 5.834932095641106) internal successors, (10167941), 1742639 states have internal predecessors, (10167941), 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 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 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)