./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_27-funptr_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4f8aebc-c13b-4257-b2ba-770efc4bd19a/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4f8aebc-c13b-4257-b2ba-770efc4bd19a/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4f8aebc-c13b-4257-b2ba-770efc4bd19a/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4f8aebc-c13b-4257-b2ba-770efc4bd19a/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_27-funptr_racing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4f8aebc-c13b-4257-b2ba-770efc4bd19a/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4f8aebc-c13b-4257-b2ba-770efc4bd19a/bin/utaipan-7li7fVZpFI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8d24e1fe59577ae07a5b7a898c9dc79f871eafbb8fdf9529a0c24eed9c094f3d --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 02:23:23,324 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:23:23,326 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:23:23,362 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:23:23,362 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:23:23,363 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:23:23,364 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:23:23,373 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:23:23,376 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:23:23,378 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:23:23,379 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:23:23,381 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:23:23,382 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:23:23,385 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:23:23,387 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:23:23,390 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:23:23,392 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:23:23,399 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:23:23,400 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:23:23,402 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:23:23,406 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:23:23,412 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:23:23,413 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:23:23,413 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:23:23,416 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:23:23,417 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:23:23,417 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:23:23,418 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:23:23,418 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:23:23,419 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:23:23,419 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:23:23,420 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:23:23,421 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:23:23,421 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:23:23,422 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:23:23,422 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:23:23,423 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:23:23,423 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:23:23,423 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:23:23,424 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:23:23,425 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:23:23,433 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4f8aebc-c13b-4257-b2ba-770efc4bd19a/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 02:23:23,465 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:23:23,466 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:23:23,467 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:23:23,467 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:23:23,468 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:23:23,468 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:23:23,468 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:23:23,468 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:23:23,469 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:23:23,469 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:23:23,470 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:23:23,470 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:23:23,470 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:23:23,471 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:23:23,471 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:23:23,471 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:23:23,471 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:23:23,471 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:23:23,472 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:23:23,472 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:23:23,472 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:23:23,473 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:23:23,473 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:23:23,473 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:23:23,473 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:23:23,473 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:23:23,473 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:23:23,474 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:23:23,474 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:23:23,474 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:23:23,474 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:23:23,475 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:23:23,475 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:23:23,475 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:23:23,475 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:23:23,476 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:23:23,476 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:23:23,476 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:23:23,476 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:23:23,476 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:23:23,476 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:23:23,477 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_f4f8aebc-c13b-4257-b2ba-770efc4bd19a/bin/utaipan-7li7fVZpFI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4f8aebc-c13b-4257-b2ba-770efc4bd19a/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8d24e1fe59577ae07a5b7a898c9dc79f871eafbb8fdf9529a0c24eed9c094f3d [2022-11-03 02:23:23,769 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:23:23,807 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:23:23,810 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:23:23,811 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:23:23,812 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:23:23,813 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4f8aebc-c13b-4257-b2ba-770efc4bd19a/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/goblint-regression/28-race_reach_27-funptr_racing.i [2022-11-03 02:23:23,878 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4f8aebc-c13b-4257-b2ba-770efc4bd19a/bin/utaipan-7li7fVZpFI/data/a40d32adf/20799f45f5a148d2947d2b2ab6ab299b/FLAGd944496bd [2022-11-03 02:23:24,404 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:23:24,405 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4f8aebc-c13b-4257-b2ba-770efc4bd19a/sv-benchmarks/c/goblint-regression/28-race_reach_27-funptr_racing.i [2022-11-03 02:23:24,419 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4f8aebc-c13b-4257-b2ba-770efc4bd19a/bin/utaipan-7li7fVZpFI/data/a40d32adf/20799f45f5a148d2947d2b2ab6ab299b/FLAGd944496bd [2022-11-03 02:23:24,893 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4f8aebc-c13b-4257-b2ba-770efc4bd19a/bin/utaipan-7li7fVZpFI/data/a40d32adf/20799f45f5a148d2947d2b2ab6ab299b [2022-11-03 02:23:24,895 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:23:24,899 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:23:24,903 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:23:24,903 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:23:24,907 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:23:24,908 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:23:24" (1/1) ... [2022-11-03 02:23:24,910 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67440ac4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:23:24, skipping insertion in model container [2022-11-03 02:23:24,911 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:23:24" (1/1) ... [2022-11-03 02:23:24,918 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:23:24,981 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:23:25,465 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_f4f8aebc-c13b-4257-b2ba-770efc4bd19a/sv-benchmarks/c/goblint-regression/28-race_reach_27-funptr_racing.i[41323,41336] [2022-11-03 02:23:25,486 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:23:25,499 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:23:25,531 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_f4f8aebc-c13b-4257-b2ba-770efc4bd19a/sv-benchmarks/c/goblint-regression/28-race_reach_27-funptr_racing.i[41323,41336] [2022-11-03 02:23:25,540 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:23:25,598 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:23:25,598 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:23:25 WrapperNode [2022-11-03 02:23:25,598 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:23:25,599 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:23:25,600 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:23:25,600 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:23:25,607 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:23:25" (1/1) ... [2022-11-03 02:23:25,627 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:23:25" (1/1) ... [2022-11-03 02:23:25,663 INFO L138 Inliner]: procedures = 273, calls = 43, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 148 [2022-11-03 02:23:25,663 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:23:25,664 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:23:25,664 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:23:25,664 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:23:25,673 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:23:25" (1/1) ... [2022-11-03 02:23:25,674 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:23:25" (1/1) ... [2022-11-03 02:23:25,677 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:23:25" (1/1) ... [2022-11-03 02:23:25,678 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:23:25" (1/1) ... [2022-11-03 02:23:25,683 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:23:25" (1/1) ... [2022-11-03 02:23:25,688 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:23:25" (1/1) ... [2022-11-03 02:23:25,690 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:23:25" (1/1) ... [2022-11-03 02:23:25,691 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:23:25" (1/1) ... [2022-11-03 02:23:25,694 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:23:25,695 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:23:25,695 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:23:25,696 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:23:25,696 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:23:25" (1/1) ... [2022-11-03 02:23:25,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:23:25,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4f8aebc-c13b-4257-b2ba-770efc4bd19a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:23:25,737 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4f8aebc-c13b-4257-b2ba-770efc4bd19a/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:23:25,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4f8aebc-c13b-4257-b2ba-770efc4bd19a/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:23:25,779 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 02:23:25,779 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 02:23:25,780 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 02:23:25,780 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 02:23:25,780 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-03 02:23:25,780 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:23:25,780 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-11-03 02:23:25,781 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-11-03 02:23:25,781 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:23:25,781 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:23:25,781 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:23:25,783 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-03 02:23:25,927 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:23:25,929 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:23:26,250 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:23:26,258 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:23:26,258 INFO L300 CfgBuilder]: Removed 16 assume(true) statements. [2022-11-03 02:23:26,260 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:23:26 BoogieIcfgContainer [2022-11-03 02:23:26,261 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:23:26,263 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:23:26,263 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:23:26,266 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:23:26,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:23:24" (1/3) ... [2022-11-03 02:23:26,267 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f176edc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:23:26, skipping insertion in model container [2022-11-03 02:23:26,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:23:25" (2/3) ... [2022-11-03 02:23:26,268 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f176edc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:23:26, skipping insertion in model container [2022-11-03 02:23:26,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:23:26" (3/3) ... [2022-11-03 02:23:26,269 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_27-funptr_racing.i [2022-11-03 02:23:26,307 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-03 02:23:26,316 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:23:26,317 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:23:26,334 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-03 02:23:26,451 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-11-03 02:23:26,506 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-03 02:23:26,523 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 139 places, 155 transitions, 318 flow [2022-11-03 02:23:26,532 INFO L112 LiptonReduction]: Starting Lipton reduction on Petri net that has 139 places, 155 transitions, 318 flow [2022-11-03 02:23:26,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 139 places, 155 transitions, 318 flow [2022-11-03 02:23:26,661 INFO L130 PetriNetUnfolder]: 24/195 cut-off events. [2022-11-03 02:23:26,662 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-03 02:23:26,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 201 conditions, 195 events. 24/195 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 540 event pairs, 0 based on Foata normal form. 0/166 useless extension candidates. Maximal degree in co-relation 111. Up to 4 conditions per place. [2022-11-03 02:23:26,678 INFO L118 LiptonReduction]: Number of co-enabled transitions 6072 [2022-11-03 02:23:31,258 INFO L133 LiptonReduction]: Checked pairs total: 11257 [2022-11-03 02:23:31,258 INFO L135 LiptonReduction]: Total number of compositions: 135 [2022-11-03 02:23:31,269 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 40 places, 53 transitions, 114 flow [2022-11-03 02:23:31,321 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 241 states, 236 states have (on average 2.5635593220338984) internal successors, (605), 240 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:23:31,340 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:23:31,346 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;@12ed364e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:23:31,346 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-03 02:23:31,349 INFO L276 IsEmpty]: Start isEmpty. Operand has 241 states, 236 states have (on average 2.5635593220338984) internal successors, (605), 240 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:23:31,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-03 02:23:31,355 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:23:31,356 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2022-11-03 02:23:31,356 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-03 02:23:31,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:23:31,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1194795619, now seen corresponding path program 1 times [2022-11-03 02:23:31,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:23:31,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064750213] [2022-11-03 02:23:31,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:23:31,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:23:31,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 02:23:31,544 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-03 02:23:31,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 02:23:31,594 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-03 02:23:31,595 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-03 02:23:31,597 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-03 02:23:31,598 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-03 02:23:31,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:23:31,601 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-03 02:23:31,606 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-03 02:23:31,606 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-03 02:23:31,644 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-03 02:23:31,647 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-03 02:23:31,648 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 195 places, 223 transitions, 464 flow [2022-11-03 02:23:31,648 INFO L112 LiptonReduction]: Starting Lipton reduction on Petri net that has 195 places, 223 transitions, 464 flow [2022-11-03 02:23:31,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 195 places, 223 transitions, 464 flow [2022-11-03 02:23:31,722 INFO L130 PetriNetUnfolder]: 45/328 cut-off events. [2022-11-03 02:23:31,722 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-03 02:23:31,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 342 conditions, 328 events. 45/328 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1175 event pairs, 0 based on Foata normal form. 0/276 useless extension candidates. Maximal degree in co-relation 197. Up to 8 conditions per place. [2022-11-03 02:23:31,743 INFO L118 LiptonReduction]: Number of co-enabled transitions 22308 [2022-11-03 02:23:37,169 INFO L133 LiptonReduction]: Checked pairs total: 58114 [2022-11-03 02:23:37,169 INFO L135 LiptonReduction]: Total number of compositions: 189 [2022-11-03 02:23:37,171 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 73 places, 98 transitions, 214 flow [2022-11-03 02:23:37,589 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 8436 states, 8429 states have (on average 3.909835093130858) internal successors, (32956), 8435 states have internal predecessors, (32956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:23:37,591 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:23:37,598 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;@12ed364e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:23:37,599 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-03 02:23:37,639 INFO L276 IsEmpty]: Start isEmpty. Operand has 8436 states, 8429 states have (on average 3.909835093130858) internal successors, (32956), 8435 states have internal predecessors, (32956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:23:37,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-03 02:23:37,648 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:23:37,649 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:23:37,649 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-03 02:23:37,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:23:37,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1556515366, now seen corresponding path program 1 times [2022-11-03 02:23:37,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:23:37,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108523258] [2022-11-03 02:23:37,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:23:37,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:23:37,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:23:37,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:23:37,826 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:23:37,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108523258] [2022-11-03 02:23:37,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108523258] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:23:37,827 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:23:37,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 02:23:37,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028217930] [2022-11-03 02:23:37,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:23:37,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:23:37,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:23:37,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:23:37,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:23:37,888 INFO L87 Difference]: Start difference. First operand has 8436 states, 8429 states have (on average 3.909835093130858) internal successors, (32956), 8435 states have internal predecessors, (32956), 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 3 states, 3 states have (on average 2.3333333333333335) 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) [2022-11-03 02:23:38,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:23:38,205 INFO L93 Difference]: Finished difference Result 8428 states and 24353 transitions. [2022-11-03 02:23:38,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:23:38,208 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) 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 [2022-11-03 02:23:38,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:23:38,331 INFO L225 Difference]: With dead ends: 8428 [2022-11-03 02:23:38,332 INFO L226 Difference]: Without dead ends: 7128 [2022-11-03 02:23:38,332 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 [2022-11-03 02:23:38,340 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 28 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:23:38,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 40 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:23:38,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7128 states. [2022-11-03 02:23:38,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7128 to 7128. [2022-11-03 02:23:38,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7128 states, 7125 states have (on average 2.8776140350877193) internal successors, (20503), 7127 states have internal predecessors, (20503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:23:38,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7128 states to 7128 states and 20503 transitions. [2022-11-03 02:23:38,753 INFO L78 Accepts]: Start accepts. Automaton has 7128 states and 20503 transitions. Word has length 7 [2022-11-03 02:23:38,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:23:38,753 INFO L495 AbstractCegarLoop]: Abstraction has 7128 states and 20503 transitions. [2022-11-03 02:23:38,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) 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) [2022-11-03 02:23:38,754 INFO L276 IsEmpty]: Start isEmpty. Operand 7128 states and 20503 transitions. [2022-11-03 02:23:38,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-03 02:23:38,756 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:23:38,756 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:23:38,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 02:23:38,756 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-03 02:23:38,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:23:38,757 INFO L85 PathProgramCache]: Analyzing trace with hash 525551705, now seen corresponding path program 1 times [2022-11-03 02:23:38,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:23:38,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546970337] [2022-11-03 02:23:38,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:23:38,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:23:38,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:23:38,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:23:38,839 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:23:38,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546970337] [2022-11-03 02:23:38,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546970337] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:23:38,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524240828] [2022-11-03 02:23:38,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:23:38,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:23:38,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4f8aebc-c13b-4257-b2ba-770efc4bd19a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:23:38,842 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4f8aebc-c13b-4257-b2ba-770efc4bd19a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:23:38,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4f8aebc-c13b-4257-b2ba-770efc4bd19a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:23:38,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:23:38,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:23:38,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:23:39,030 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:23:39,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:23:39,066 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:23:39,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524240828] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:23:39,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [88979990] [2022-11-03 02:23:39,074 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) [2022-11-03 02:23:39,089 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:23:39,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-03 02:23:39,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701058396] [2022-11-03 02:23:39,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:23:39,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:23:39,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:23:39,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:23:39,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:23:39,091 INFO L87 Difference]: Start difference. First operand 7128 states and 20503 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:23:39,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:23:39,300 INFO L93 Difference]: Finished difference Result 3228 states and 8953 transitions. [2022-11-03 02:23:39,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:23:39,300 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 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 [2022-11-03 02:23:39,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:23:39,316 INFO L225 Difference]: With dead ends: 3228 [2022-11-03 02:23:39,316 INFO L226 Difference]: Without dead ends: 3228 [2022-11-03 02:23:39,316 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:23:39,318 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 189 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:23:39,318 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 71 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:23:39,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3228 states. [2022-11-03 02:23:39,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3228 to 3228. [2022-11-03 02:23:39,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3228 states, 3227 states have (on average 2.774403470715835) internal successors, (8953), 3227 states have internal predecessors, (8953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:23:39,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3228 states to 3228 states and 8953 transitions. [2022-11-03 02:23:39,465 INFO L78 Accepts]: Start accepts. Automaton has 3228 states and 8953 transitions. Word has length 11 [2022-11-03 02:23:39,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:23:39,465 INFO L495 AbstractCegarLoop]: Abstraction has 3228 states and 8953 transitions. [2022-11-03 02:23:39,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:23:39,466 INFO L276 IsEmpty]: Start isEmpty. Operand 3228 states and 8953 transitions. [2022-11-03 02:23:39,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-03 02:23:39,468 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:23:39,469 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-11-03 02:23:39,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4f8aebc-c13b-4257-b2ba-770efc4bd19a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:23:39,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4f8aebc-c13b-4257-b2ba-770efc4bd19a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:23:39,682 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-03 02:23:39,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:23:39,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1290108336, now seen corresponding path program 1 times [2022-11-03 02:23:39,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:23:39,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467385955] [2022-11-03 02:23:39,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:23:39,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:23:39,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 02:23:39,720 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-03 02:23:39,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 02:23:39,747 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-03 02:23:39,753 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-03 02:23:39,754 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-03 02:23:39,755 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-03 02:23:39,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 02:23:39,755 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-11-03 02:23:39,756 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-03 02:23:39,757 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-03 02:23:39,795 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-03 02:23:39,802 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-03 02:23:39,803 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 251 places, 291 transitions, 612 flow [2022-11-03 02:23:39,803 INFO L112 LiptonReduction]: Starting Lipton reduction on Petri net that has 251 places, 291 transitions, 612 flow [2022-11-03 02:23:39,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 251 places, 291 transitions, 612 flow [2022-11-03 02:23:39,940 INFO L130 PetriNetUnfolder]: 71/494 cut-off events. [2022-11-03 02:23:39,940 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-11-03 02:23:39,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 522 conditions, 494 events. 71/494 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1976 event pairs, 1 based on Foata normal form. 0/415 useless extension candidates. Maximal degree in co-relation 336. Up to 16 conditions per place. [2022-11-03 02:23:39,980 INFO L118 LiptonReduction]: Number of co-enabled transitions 47124 [2022-11-03 02:23:47,283 INFO L133 LiptonReduction]: Checked pairs total: 126400 [2022-11-03 02:23:47,283 INFO L135 LiptonReduction]: Total number of compositions: 238 [2022-11-03 02:23:47,284 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 100 places, 137 transitions, 304 flow [2022-11-03 02:23:56,026 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 210936 states, 210927 states have (on average 5.386252115660868) internal successors, (1136106), 210935 states have internal predecessors, (1136106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:23:56,033 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:23:56,034 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;@12ed364e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:23:56,035 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-03 02:23:56,451 INFO L276 IsEmpty]: Start isEmpty. Operand has 210936 states, 210927 states have (on average 5.386252115660868) internal successors, (1136106), 210935 states have internal predecessors, (1136106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:23:56,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-03 02:23:56,452 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:23:56,452 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:23:56,453 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-03 02:23:56,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:23:56,454 INFO L85 PathProgramCache]: Analyzing trace with hash -268840249, now seen corresponding path program 1 times [2022-11-03 02:23:56,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:23:56,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121216300] [2022-11-03 02:23:56,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:23:56,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:23:56,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:23:56,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:23:56,526 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:23:56,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121216300] [2022-11-03 02:23:56,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121216300] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:23:56,528 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:23:56,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 02:23:56,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117272973] [2022-11-03 02:23:56,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:23:56,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:23:56,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:23:56,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:23:56,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:23:56,938 INFO L87 Difference]: Start difference. First operand has 210936 states, 210927 states have (on average 5.386252115660868) internal successors, (1136106), 210935 states have internal predecessors, (1136106), 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 3 states, 3 states have (on average 2.3333333333333335) 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) [2022-11-03 02:24:01,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:24:01,674 INFO L93 Difference]: Finished difference Result 210928 states and 819978 transitions. [2022-11-03 02:24:01,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:24:01,691 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) 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 [2022-11-03 02:24:01,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:24:03,349 INFO L225 Difference]: With dead ends: 210928 [2022-11-03 02:24:03,350 INFO L226 Difference]: Without dead ends: 178378 [2022-11-03 02:24:03,350 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 [2022-11-03 02:24:03,351 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 28 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:24:03,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 48 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 02:24:04,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178378 states. [2022-11-03 02:24:09,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178378 to 178378. [2022-11-03 02:24:10,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178378 states, 178374 states have (on average 3.874600558377342) internal successors, (691128), 178377 states have internal predecessors, (691128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:24:12,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178378 states to 178378 states and 691128 transitions. [2022-11-03 02:24:12,389 INFO L78 Accepts]: Start accepts. Automaton has 178378 states and 691128 transitions. Word has length 7 [2022-11-03 02:24:12,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:24:12,390 INFO L495 AbstractCegarLoop]: Abstraction has 178378 states and 691128 transitions. [2022-11-03 02:24:12,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) 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) [2022-11-03 02:24:12,391 INFO L276 IsEmpty]: Start isEmpty. Operand 178378 states and 691128 transitions. [2022-11-03 02:24:12,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-03 02:24:12,392 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:24:12,392 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:24:12,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 02:24:12,392 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-03 02:24:12,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:24:12,393 INFO L85 PathProgramCache]: Analyzing trace with hash -636786212, now seen corresponding path program 1 times [2022-11-03 02:24:12,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:24:12,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880016778] [2022-11-03 02:24:12,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:24:12,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:24:12,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:24:12,444 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:24:12,445 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:24:12,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880016778] [2022-11-03 02:24:12,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880016778] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:24:12,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335414456] [2022-11-03 02:24:12,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:24:12,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:24:12,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4f8aebc-c13b-4257-b2ba-770efc4bd19a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:24:12,451 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4f8aebc-c13b-4257-b2ba-770efc4bd19a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:24:12,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4f8aebc-c13b-4257-b2ba-770efc4bd19a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 02:24:12,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:24:12,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:24:12,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:24:12,578 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:24:12,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:24:12,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:24:12,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335414456] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:24:12,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [877964332] [2022-11-03 02:24:12,599 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) [2022-11-03 02:24:12,600 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:24:12,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-03 02:24:12,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903170626] [2022-11-03 02:24:12,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:24:12,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:24:12,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:24:12,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:24:12,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:24:12,603 INFO L87 Difference]: Start difference. First operand 178378 states and 691128 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:24:14,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:24:14,342 INFO L93 Difference]: Finished difference Result 80728 states and 304578 transitions. [2022-11-03 02:24:14,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:24:14,345 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 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 [2022-11-03 02:24:14,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:24:14,912 INFO L225 Difference]: With dead ends: 80728 [2022-11-03 02:24:14,912 INFO L226 Difference]: Without dead ends: 80728 [2022-11-03 02:24:14,913 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:24:14,914 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 393 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 393 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:24:14,914 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [393 Valid, 109 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:24:15,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80728 states. [2022-11-03 02:24:17,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80728 to 80728. [2022-11-03 02:24:17,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80728 states, 80727 states have (on average 3.772938422089264) internal successors, (304578), 80727 states have internal predecessors, (304578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:24:18,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80728 states to 80728 states and 304578 transitions. [2022-11-03 02:24:18,407 INFO L78 Accepts]: Start accepts. Automaton has 80728 states and 304578 transitions. Word has length 11 [2022-11-03 02:24:18,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:24:18,407 INFO L495 AbstractCegarLoop]: Abstraction has 80728 states and 304578 transitions. [2022-11-03 02:24:18,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:24:18,408 INFO L276 IsEmpty]: Start isEmpty. Operand 80728 states and 304578 transitions. [2022-11-03 02:24:18,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-03 02:24:18,410 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:24:18,410 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2022-11-03 02:24:18,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4f8aebc-c13b-4257-b2ba-770efc4bd19a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:24:18,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4f8aebc-c13b-4257-b2ba-770efc4bd19a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:24:18,611 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-03 02:24:18,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:24:18,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1872996235, now seen corresponding path program 1 times [2022-11-03 02:24:18,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:24:18,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237079562] [2022-11-03 02:24:18,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:24:18,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:24:18,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 02:24:18,647 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-03 02:24:18,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 02:24:18,684 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-03 02:24:18,689 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-03 02:24:18,690 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-03 02:24:18,690 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-03 02:24:18,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-03 02:24:18,690 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-11-03 02:24:18,691 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-03 02:24:18,692 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-11-03 02:24:18,733 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-03 02:24:18,737 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-03 02:24:18,738 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 307 places, 359 transitions, 762 flow [2022-11-03 02:24:18,738 INFO L112 LiptonReduction]: Starting Lipton reduction on Petri net that has 307 places, 359 transitions, 762 flow [2022-11-03 02:24:18,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 307 places, 359 transitions, 762 flow [2022-11-03 02:24:18,952 INFO L130 PetriNetUnfolder]: 109/728 cut-off events. [2022-11-03 02:24:18,952 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-11-03 02:24:18,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 783 conditions, 728 events. 109/728 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3200 event pairs, 6 based on Foata normal form. 0/614 useless extension candidates. Maximal degree in co-relation 514. Up to 32 conditions per place. [2022-11-03 02:24:19,028 INFO L118 LiptonReduction]: Number of co-enabled transitions 81048 [2022-11-03 02:24:27,272 INFO L133 LiptonReduction]: Checked pairs total: 229950 [2022-11-03 02:24:27,273 INFO L135 LiptonReduction]: Total number of compositions: 293 [2022-11-03 02:24:27,275 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 127 places, 176 transitions, 396 flow