./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/parallel-misc-4.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b 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_614c7250-b662-4bbc-8c71-b695ddb2d8df/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c7250-b662-4bbc-8c71-b695ddb2d8df/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c7250-b662-4bbc-8c71-b695ddb2d8df/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c7250-b662-4bbc-8c71-b695ddb2d8df/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/parallel-misc-4.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c7250-b662-4bbc-8c71-b695ddb2d8df/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c7250-b662-4bbc-8c71-b695ddb2d8df/bin/utaipan-I9t0OCRTmS --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 4ed4cbcf73a390a7811d007883e420d1e9d8d4b9f5e59201847b4262dc4b0025 --- 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-8393723 [2022-11-19 08:12:47,432 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 08:12:47,434 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 08:12:47,474 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 08:12:47,475 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 08:12:47,478 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 08:12:47,481 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 08:12:47,486 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 08:12:47,488 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 08:12:47,496 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 08:12:47,498 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 08:12:47,499 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 08:12:47,500 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 08:12:47,502 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 08:12:47,504 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 08:12:47,505 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 08:12:47,507 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 08:12:47,508 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 08:12:47,510 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 08:12:47,515 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 08:12:47,517 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 08:12:47,518 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 08:12:47,521 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 08:12:47,523 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 08:12:47,533 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 08:12:47,533 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 08:12:47,534 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 08:12:47,536 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 08:12:47,537 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 08:12:47,538 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 08:12:47,538 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 08:12:47,540 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 08:12:47,542 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 08:12:47,544 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 08:12:47,545 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 08:12:47,545 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 08:12:47,546 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 08:12:47,547 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 08:12:47,547 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 08:12:47,548 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 08:12:47,549 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 08:12:47,550 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c7250-b662-4bbc-8c71-b695ddb2d8df/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 08:12:47,587 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 08:12:47,588 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 08:12:47,588 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 08:12:47,588 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 08:12:47,589 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 08:12:47,589 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 08:12:47,589 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 08:12:47,590 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 08:12:47,590 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 08:12:47,590 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 08:12:47,590 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 08:12:47,591 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 08:12:47,591 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 08:12:47,591 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 08:12:47,591 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 08:12:47,592 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 08:12:47,592 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 08:12:47,592 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 08:12:47,593 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 08:12:47,593 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 08:12:47,593 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 08:12:47,594 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 08:12:47,594 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 08:12:47,594 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 08:12:47,594 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 08:12:47,595 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 08:12:47,595 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 08:12:47,595 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 08:12:47,595 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 08:12:47,595 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 08:12:47,596 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 08:12:47,596 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 08:12:47,596 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:12:47,596 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 08:12:47,597 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 08:12:47,597 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 08:12:47,597 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 08:12:47,597 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 08:12:47,598 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 08:12:47,598 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 08:12:47,598 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 08:12:47,598 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_614c7250-b662-4bbc-8c71-b695ddb2d8df/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c7250-b662-4bbc-8c71-b695ddb2d8df/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ed4cbcf73a390a7811d007883e420d1e9d8d4b9f5e59201847b4262dc4b0025 [2022-11-19 08:12:47,911 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 08:12:47,942 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 08:12:47,944 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 08:12:47,946 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 08:12:47,947 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 08:12:47,948 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c7250-b662-4bbc-8c71-b695ddb2d8df/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/weaver/parallel-misc-4.wvr.c [2022-11-19 08:12:48,017 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c7250-b662-4bbc-8c71-b695ddb2d8df/bin/utaipan-I9t0OCRTmS/data/3baefb119/72781eb25574444eaed48e4976ce4827/FLAG8e48e48d1 [2022-11-19 08:12:48,586 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 08:12:48,587 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c7250-b662-4bbc-8c71-b695ddb2d8df/sv-benchmarks/c/weaver/parallel-misc-4.wvr.c [2022-11-19 08:12:48,594 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c7250-b662-4bbc-8c71-b695ddb2d8df/bin/utaipan-I9t0OCRTmS/data/3baefb119/72781eb25574444eaed48e4976ce4827/FLAG8e48e48d1 [2022-11-19 08:12:48,926 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c7250-b662-4bbc-8c71-b695ddb2d8df/bin/utaipan-I9t0OCRTmS/data/3baefb119/72781eb25574444eaed48e4976ce4827 [2022-11-19 08:12:48,928 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 08:12:48,930 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 08:12:48,931 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 08:12:48,931 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 08:12:48,936 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 08:12:48,937 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:12:48" (1/1) ... [2022-11-19 08:12:48,938 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f96ec2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:12:48, skipping insertion in model container [2022-11-19 08:12:48,939 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:12:48" (1/1) ... [2022-11-19 08:12:48,948 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 08:12:48,976 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 08:12:49,184 WARN L234 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_614c7250-b662-4bbc-8c71-b695ddb2d8df/sv-benchmarks/c/weaver/parallel-misc-4.wvr.c[2950,2963] [2022-11-19 08:12:49,188 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:12:49,198 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 08:12:49,218 WARN L234 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_614c7250-b662-4bbc-8c71-b695ddb2d8df/sv-benchmarks/c/weaver/parallel-misc-4.wvr.c[2950,2963] [2022-11-19 08:12:49,219 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:12:49,232 INFO L208 MainTranslator]: Completed translation [2022-11-19 08:12:49,233 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:12:49 WrapperNode [2022-11-19 08:12:49,233 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 08:12:49,234 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 08:12:49,234 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 08:12:49,235 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 08:12:49,243 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:12:49" (1/1) ... [2022-11-19 08:12:49,250 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:12:49" (1/1) ... [2022-11-19 08:12:49,269 INFO L138 Inliner]: procedures = 22, calls = 43, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 71 [2022-11-19 08:12:49,269 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 08:12:49,270 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 08:12:49,270 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 08:12:49,270 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 08:12:49,279 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:12:49" (1/1) ... [2022-11-19 08:12:49,279 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:12:49" (1/1) ... [2022-11-19 08:12:49,282 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:12:49" (1/1) ... [2022-11-19 08:12:49,282 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:12:49" (1/1) ... [2022-11-19 08:12:49,288 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:12:49" (1/1) ... [2022-11-19 08:12:49,292 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:12:49" (1/1) ... [2022-11-19 08:12:49,293 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:12:49" (1/1) ... [2022-11-19 08:12:49,295 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:12:49" (1/1) ... [2022-11-19 08:12:49,297 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 08:12:49,298 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 08:12:49,298 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 08:12:49,298 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 08:12:49,299 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:12:49" (1/1) ... [2022-11-19 08:12:49,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:12:49,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c7250-b662-4bbc-8c71-b695ddb2d8df/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:12:49,336 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c7250-b662-4bbc-8c71-b695ddb2d8df/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 08:12:49,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c7250-b662-4bbc-8c71-b695ddb2d8df/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 08:12:49,401 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 08:12:49,401 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-19 08:12:49,401 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-19 08:12:49,401 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-19 08:12:49,401 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-19 08:12:49,401 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-19 08:12:49,402 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-19 08:12:49,402 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 08:12:49,402 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-19 08:12:49,402 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-19 08:12:49,402 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-19 08:12:49,402 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-19 08:12:49,402 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 08:12:49,402 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 08:12:49,403 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-19 08:12:49,403 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 08:12:49,404 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-19 08:12:49,544 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 08:12:49,552 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 08:12:49,777 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 08:12:49,806 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 08:12:49,807 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-19 08:12:49,809 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:12:49 BoogieIcfgContainer [2022-11-19 08:12:49,809 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 08:12:49,812 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 08:12:49,812 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 08:12:49,816 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 08:12:49,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:12:48" (1/3) ... [2022-11-19 08:12:49,817 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64cd8e26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:12:49, skipping insertion in model container [2022-11-19 08:12:49,817 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:12:49" (2/3) ... [2022-11-19 08:12:49,818 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64cd8e26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:12:49, skipping insertion in model container [2022-11-19 08:12:49,818 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:12:49" (3/3) ... [2022-11-19 08:12:49,820 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-misc-4.wvr.c [2022-11-19 08:12:49,829 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-19 08:12:49,840 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 08:12:49,840 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 08:12:49,840 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-19 08:12:49,923 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-19 08:12:49,965 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-19 08:12:49,980 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 108 places, 105 transitions, 234 flow [2022-11-19 08:12:49,983 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 108 places, 105 transitions, 234 flow [2022-11-19 08:12:49,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 105 transitions, 234 flow [2022-11-19 08:12:50,066 INFO L130 PetriNetUnfolder]: 7/102 cut-off events. [2022-11-19 08:12:50,071 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-19 08:12:50,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115 conditions, 102 events. 7/102 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 69 event pairs, 0 based on Foata normal form. 0/94 useless extension candidates. Maximal degree in co-relation 79. Up to 2 conditions per place. [2022-11-19 08:12:50,079 INFO L119 LiptonReduction]: Number of co-enabled transitions 1134 [2022-11-19 08:12:54,557 INFO L134 LiptonReduction]: Checked pairs total: 1492 [2022-11-19 08:12:54,557 INFO L136 LiptonReduction]: Total number of compositions: 90 [2022-11-19 08:12:54,567 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 34 places, 26 transitions, 76 flow [2022-11-19 08:12:54,593 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 128 states, 127 states have (on average 2.7874015748031495) internal successors, (354), 127 states have internal predecessors, (354), 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) [2022-11-19 08:12:54,615 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 08:12:54,621 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;@3ab383a5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 08:12:54,621 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-19 08:12:54,624 INFO L276 IsEmpty]: Start isEmpty. Operand has 128 states, 127 states have (on average 2.7874015748031495) internal successors, (354), 127 states have internal predecessors, (354), 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) [2022-11-19 08:12:54,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-19 08:12:54,633 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:12:54,634 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:12:54,634 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-19 08:12:54,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:12:54,640 INFO L85 PathProgramCache]: Analyzing trace with hash -260829601, now seen corresponding path program 1 times [2022-11-19 08:12:54,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:12:54,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065999440] [2022-11-19 08:12:54,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:12:54,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:12:54,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:12:55,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:12:55,346 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:12:55,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065999440] [2022-11-19 08:12:55,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065999440] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:12:55,348 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:12:55,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:12:55,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14844957] [2022-11-19 08:12:55,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:12:55,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:12:55,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:12:55,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:12:55,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:12:55,389 INFO L87 Difference]: Start difference. First operand has 128 states, 127 states have (on average 2.7874015748031495) internal successors, (354), 127 states have internal predecessors, (354), 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 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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) [2022-11-19 08:12:55,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:12:55,611 INFO L93 Difference]: Finished difference Result 118 states and 316 transitions. [2022-11-19 08:12:55,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:12:55,614 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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 18 [2022-11-19 08:12:55,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:12:55,631 INFO L225 Difference]: With dead ends: 118 [2022-11-19 08:12:55,631 INFO L226 Difference]: Without dead ends: 118 [2022-11-19 08:12:55,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:12:55,635 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 31 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:12:55,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 0 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:12:55,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-11-19 08:12:55,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2022-11-19 08:12:55,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.700854700854701) internal successors, (316), 117 states have internal predecessors, (316), 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) [2022-11-19 08:12:55,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 316 transitions. [2022-11-19 08:12:55,687 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 316 transitions. Word has length 18 [2022-11-19 08:12:55,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:12:55,688 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 316 transitions. [2022-11-19 08:12:55,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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) [2022-11-19 08:12:55,689 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 316 transitions. [2022-11-19 08:12:55,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-19 08:12:55,690 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:12:55,691 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:12:55,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 08:12:55,691 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-19 08:12:55,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:12:55,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1934861815, now seen corresponding path program 2 times [2022-11-19 08:12:55,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:12:55,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138286077] [2022-11-19 08:12:55,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:12:55,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:12:55,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:12:55,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:12:55,983 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:12:55,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138286077] [2022-11-19 08:12:55,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138286077] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:12:55,984 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:12:55,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:12:55,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625803215] [2022-11-19 08:12:55,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:12:55,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:12:55,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:12:55,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:12:55,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:12:55,987 INFO L87 Difference]: Start difference. First operand 118 states and 316 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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) [2022-11-19 08:12:56,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:12:56,217 INFO L93 Difference]: Finished difference Result 214 states and 563 transitions. [2022-11-19 08:12:56,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 08:12:56,218 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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 18 [2022-11-19 08:12:56,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:12:56,220 INFO L225 Difference]: With dead ends: 214 [2022-11-19 08:12:56,220 INFO L226 Difference]: Without dead ends: 144 [2022-11-19 08:12:56,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-19 08:12:56,222 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 36 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:12:56,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 5 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:12:56,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-11-19 08:12:56,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2022-11-19 08:12:56,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.6573426573426575) internal successors, (380), 143 states have internal predecessors, (380), 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) [2022-11-19 08:12:56,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 380 transitions. [2022-11-19 08:12:56,238 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 380 transitions. Word has length 18 [2022-11-19 08:12:56,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:12:56,238 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 380 transitions. [2022-11-19 08:12:56,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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) [2022-11-19 08:12:56,239 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 380 transitions. [2022-11-19 08:12:56,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-19 08:12:56,241 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:12:56,241 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:12:56,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 08:12:56,242 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-19 08:12:56,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:12:56,242 INFO L85 PathProgramCache]: Analyzing trace with hash -1988566178, now seen corresponding path program 1 times [2022-11-19 08:12:56,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:12:56,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920026727] [2022-11-19 08:12:56,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:12:56,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:12:56,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:12:56,482 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:12:56,483 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:12:56,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920026727] [2022-11-19 08:12:56,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920026727] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:12:56,486 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:12:56,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 08:12:56,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943612318] [2022-11-19 08:12:56,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:12:56,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:12:56,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:12:56,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:12:56,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:12:56,489 INFO L87 Difference]: Start difference. First operand 144 states and 380 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 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) [2022-11-19 08:12:56,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:12:56,703 INFO L93 Difference]: Finished difference Result 224 states and 584 transitions. [2022-11-19 08:12:56,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 08:12:56,704 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 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 20 [2022-11-19 08:12:56,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:12:56,706 INFO L225 Difference]: With dead ends: 224 [2022-11-19 08:12:56,706 INFO L226 Difference]: Without dead ends: 208 [2022-11-19 08:12:56,706 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:12:56,708 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 55 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:12:56,708 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 2 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:12:56,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-11-19 08:12:56,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 160. [2022-11-19 08:12:56,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.6729559748427674) internal successors, (425), 159 states have internal predecessors, (425), 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) [2022-11-19 08:12:56,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 425 transitions. [2022-11-19 08:12:56,741 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 425 transitions. Word has length 20 [2022-11-19 08:12:56,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:12:56,742 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 425 transitions. [2022-11-19 08:12:56,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 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) [2022-11-19 08:12:56,742 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 425 transitions. [2022-11-19 08:12:56,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-19 08:12:56,744 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:12:56,744 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:12:56,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 08:12:56,745 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-19 08:12:56,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:12:56,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1405923710, now seen corresponding path program 2 times [2022-11-19 08:12:56,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:12:56,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104673020] [2022-11-19 08:12:56,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:12:56,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:12:56,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:12:56,990 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:12:56,991 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:12:56,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104673020] [2022-11-19 08:12:56,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104673020] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:12:56,991 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:12:56,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 08:12:56,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019595136] [2022-11-19 08:12:56,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:12:56,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:12:56,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:12:56,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:12:56,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:12:56,993 INFO L87 Difference]: Start difference. First operand 160 states and 425 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 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) [2022-11-19 08:12:57,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:12:57,265 INFO L93 Difference]: Finished difference Result 234 states and 631 transitions. [2022-11-19 08:12:57,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 08:12:57,266 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 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 20 [2022-11-19 08:12:57,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:12:57,269 INFO L225 Difference]: With dead ends: 234 [2022-11-19 08:12:57,269 INFO L226 Difference]: Without dead ends: 234 [2022-11-19 08:12:57,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-19 08:12:57,270 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 54 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:12:57,271 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 4 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:12:57,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-11-19 08:12:57,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 170. [2022-11-19 08:12:57,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.6804733727810652) internal successors, (453), 169 states have internal predecessors, (453), 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) [2022-11-19 08:12:57,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 453 transitions. [2022-11-19 08:12:57,285 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 453 transitions. Word has length 20 [2022-11-19 08:12:57,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:12:57,286 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 453 transitions. [2022-11-19 08:12:57,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 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) [2022-11-19 08:12:57,287 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 453 transitions. [2022-11-19 08:12:57,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-19 08:12:57,288 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:12:57,288 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:12:57,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 08:12:57,289 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-19 08:12:57,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:12:57,289 INFO L85 PathProgramCache]: Analyzing trace with hash 721618760, now seen corresponding path program 3 times [2022-11-19 08:12:57,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:12:57,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181940595] [2022-11-19 08:12:57,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:12:57,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:12:57,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:12:57,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:12:57,486 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:12:57,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181940595] [2022-11-19 08:12:57,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181940595] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:12:57,486 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:12:57,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 08:12:57,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778662826] [2022-11-19 08:12:57,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:12:57,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:12:57,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:12:57,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:12:57,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:12:57,488 INFO L87 Difference]: Start difference. First operand 170 states and 453 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 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) [2022-11-19 08:12:57,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:12:57,733 INFO L93 Difference]: Finished difference Result 200 states and 511 transitions. [2022-11-19 08:12:57,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 08:12:57,735 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 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 20 [2022-11-19 08:12:57,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:12:57,736 INFO L225 Difference]: With dead ends: 200 [2022-11-19 08:12:57,736 INFO L226 Difference]: Without dead ends: 168 [2022-11-19 08:12:57,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-19 08:12:57,737 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 57 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:12:57,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 0 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:12:57,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-11-19 08:12:57,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 132. [2022-11-19 08:12:57,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.5419847328244276) internal successors, (333), 131 states have internal predecessors, (333), 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) [2022-11-19 08:12:57,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 333 transitions. [2022-11-19 08:12:57,746 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 333 transitions. Word has length 20 [2022-11-19 08:12:57,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:12:57,747 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 333 transitions. [2022-11-19 08:12:57,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 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) [2022-11-19 08:12:57,747 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 333 transitions. [2022-11-19 08:12:57,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-19 08:12:57,748 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:12:57,748 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:12:57,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-19 08:12:57,749 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-19 08:12:57,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:12:57,750 INFO L85 PathProgramCache]: Analyzing trace with hash -171962636, now seen corresponding path program 4 times [2022-11-19 08:12:57,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:12:57,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634164615] [2022-11-19 08:12:57,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:12:57,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:12:57,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:12:57,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:12:57,961 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:12:57,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634164615] [2022-11-19 08:12:57,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634164615] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:12:57,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836892705] [2022-11-19 08:12:57,962 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 08:12:57,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:12:57,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c7250-b662-4bbc-8c71-b695ddb2d8df/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:12:57,970 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c7250-b662-4bbc-8c71-b695ddb2d8df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:12:57,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c7250-b662-4bbc-8c71-b695ddb2d8df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 08:12:58,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:12:58,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 08:12:58,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:12:58,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:12:58,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:12:58,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:12:58,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836892705] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:12:58,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [257553537] [2022-11-19 08:12:58,521 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) [2022-11-19 08:12:58,523 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:12:58,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2022-11-19 08:12:58,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211939751] [2022-11-19 08:12:58,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:12:58,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-19 08:12:58,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:12:58,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-19 08:12:58,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-11-19 08:12:58,526 INFO L87 Difference]: Start difference. First operand 132 states and 333 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 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) [2022-11-19 08:12:59,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:12:59,296 INFO L93 Difference]: Finished difference Result 420 states and 1012 transitions. [2022-11-19 08:12:59,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-19 08:12:59,297 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 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 20 [2022-11-19 08:12:59,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:12:59,299 INFO L225 Difference]: With dead ends: 420 [2022-11-19 08:12:59,300 INFO L226 Difference]: Without dead ends: 288 [2022-11-19 08:12:59,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2022-11-19 08:12:59,301 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 223 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:12:59,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 0 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 08:12:59,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2022-11-19 08:12:59,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 192. [2022-11-19 08:12:59,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.6335078534031413) internal successors, (503), 191 states have internal predecessors, (503), 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) [2022-11-19 08:12:59,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 503 transitions. [2022-11-19 08:12:59,327 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 503 transitions. Word has length 20 [2022-11-19 08:12:59,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:12:59,327 INFO L495 AbstractCegarLoop]: Abstraction has 192 states and 503 transitions. [2022-11-19 08:12:59,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 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) [2022-11-19 08:12:59,328 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 503 transitions. [2022-11-19 08:12:59,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-19 08:12:59,329 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:12:59,329 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:12:59,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c7250-b662-4bbc-8c71-b695ddb2d8df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 08:12:59,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c7250-b662-4bbc-8c71-b695ddb2d8df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-19 08:12:59,536 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-19 08:12:59,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:12:59,537 INFO L85 PathProgramCache]: Analyzing trace with hash 953298987, now seen corresponding path program 1 times [2022-11-19 08:12:59,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:12:59,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936089566] [2022-11-19 08:12:59,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:12:59,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:12:59,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:12:59,849 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:12:59,850 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:12:59,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936089566] [2022-11-19 08:12:59,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936089566] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:12:59,850 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:12:59,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 08:12:59,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472489809] [2022-11-19 08:12:59,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:12:59,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 08:12:59,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:12:59,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 08:12:59,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:12:59,852 INFO L87 Difference]: Start difference. First operand 192 states and 503 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 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) [2022-11-19 08:13:00,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:13:00,046 INFO L93 Difference]: Finished difference Result 278 states and 686 transitions. [2022-11-19 08:13:00,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 08:13:00,046 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 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 20 [2022-11-19 08:13:00,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:13:00,048 INFO L225 Difference]: With dead ends: 278 [2022-11-19 08:13:00,048 INFO L226 Difference]: Without dead ends: 192 [2022-11-19 08:13:00,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-19 08:13:00,049 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 41 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:13:00,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 8 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:13:00,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-11-19 08:13:00,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2022-11-19 08:13:00,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.5916230366492146) internal successors, (495), 191 states have internal predecessors, (495), 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) [2022-11-19 08:13:00,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 495 transitions. [2022-11-19 08:13:00,058 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 495 transitions. Word has length 20 [2022-11-19 08:13:00,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:13:00,059 INFO L495 AbstractCegarLoop]: Abstraction has 192 states and 495 transitions. [2022-11-19 08:13:00,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 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) [2022-11-19 08:13:00,059 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 495 transitions. [2022-11-19 08:13:00,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-19 08:13:00,060 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:13:00,060 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:13:00,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-19 08:13:00,061 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-19 08:13:00,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:13:00,062 INFO L85 PathProgramCache]: Analyzing trace with hash -466833689, now seen corresponding path program 2 times [2022-11-19 08:13:00,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:13:00,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914456237] [2022-11-19 08:13:00,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:13:00,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:13:00,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:13:00,609 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:13:00,610 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:13:00,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914456237] [2022-11-19 08:13:00,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914456237] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:13:00,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021189127] [2022-11-19 08:13:00,610 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:13:00,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:13:00,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c7250-b662-4bbc-8c71-b695ddb2d8df/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:13:00,612 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c7250-b662-4bbc-8c71-b695ddb2d8df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:13:00,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c7250-b662-4bbc-8c71-b695ddb2d8df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 08:13:00,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-19 08:13:00,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:13:00,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 08:13:00,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:13:00,954 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:13:00,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:13:01,345 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:13:01,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021189127] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:13:01,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [229484435] [2022-11-19 08:13:01,348 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) [2022-11-19 08:13:01,352 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:13:01,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2022-11-19 08:13:01,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127439160] [2022-11-19 08:13:01,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:13:01,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-19 08:13:01,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:13:01,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-19 08:13:01,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2022-11-19 08:13:01,354 INFO L87 Difference]: Start difference. First operand 192 states and 495 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 states have internal predecessors, (53), 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) [2022-11-19 08:13:03,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:13:03,813 INFO L93 Difference]: Finished difference Result 414 states and 1035 transitions. [2022-11-19 08:13:03,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-19 08:13:03,814 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 states have internal predecessors, (53), 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 22 [2022-11-19 08:13:03,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:13:03,817 INFO L225 Difference]: With dead ends: 414 [2022-11-19 08:13:03,817 INFO L226 Difference]: Without dead ends: 328 [2022-11-19 08:13:03,818 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1002 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=890, Invalid=2892, Unknown=0, NotChecked=0, Total=3782 [2022-11-19 08:13:03,819 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 294 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1297 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:13:03,820 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [294 Valid, 0 Invalid, 1346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1297 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-19 08:13:03,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-11-19 08:13:03,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 190. [2022-11-19 08:13:03,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.5873015873015874) internal successors, (489), 189 states have internal predecessors, (489), 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) [2022-11-19 08:13:03,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 489 transitions. [2022-11-19 08:13:03,832 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 489 transitions. Word has length 22 [2022-11-19 08:13:03,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:13:03,833 INFO L495 AbstractCegarLoop]: Abstraction has 190 states and 489 transitions. [2022-11-19 08:13:03,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 states have internal predecessors, (53), 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) [2022-11-19 08:13:03,833 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 489 transitions. [2022-11-19 08:13:03,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-19 08:13:03,834 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:13:03,834 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:13:03,845 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c7250-b662-4bbc-8c71-b695ddb2d8df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 08:13:04,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c7250-b662-4bbc-8c71-b695ddb2d8df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-19 08:13:04,040 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-19 08:13:04,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:13:04,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1749343896, now seen corresponding path program 1 times [2022-11-19 08:13:04,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:13:04,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427519833] [2022-11-19 08:13:04,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:13:04,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:13:04,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:13:04,433 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:13:04,433 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:13:04,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427519833] [2022-11-19 08:13:04,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427519833] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:13:04,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186492728] [2022-11-19 08:13:04,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:13:04,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:13:04,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c7250-b662-4bbc-8c71-b695ddb2d8df/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:13:04,435 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c7250-b662-4bbc-8c71-b695ddb2d8df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:13:04,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c7250-b662-4bbc-8c71-b695ddb2d8df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 08:13:04,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:13:04,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-19 08:13:04,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:13:04,809 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:13:04,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:13:05,489 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:13:05,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186492728] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:13:05,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [270422040] [2022-11-19 08:13:05,490 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) [2022-11-19 08:13:05,491 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:13:05,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 11] total 25 [2022-11-19 08:13:05,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913659092] [2022-11-19 08:13:05,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:13:05,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-19 08:13:05,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:13:05,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-19 08:13:05,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=509, Unknown=0, NotChecked=0, Total=650 [2022-11-19 08:13:05,495 INFO L87 Difference]: Start difference. First operand 190 states and 489 transitions. Second operand has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 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) [2022-11-19 08:13:10,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:13:10,136 INFO L93 Difference]: Finished difference Result 622 states and 1534 transitions. [2022-11-19 08:13:10,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-11-19 08:13:10,136 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 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 24 [2022-11-19 08:13:10,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:13:10,158 INFO L225 Difference]: With dead ends: 622 [2022-11-19 08:13:10,158 INFO L226 Difference]: Without dead ends: 470 [2022-11-19 08:13:10,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4124 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=2164, Invalid=9392, Unknown=0, NotChecked=0, Total=11556 [2022-11-19 08:13:10,163 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 566 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1425 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 566 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:13:10,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [566 Valid, 0 Invalid, 1511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1425 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-19 08:13:10,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2022-11-19 08:13:10,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 250. [2022-11-19 08:13:10,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.646586345381526) internal successors, (659), 249 states have internal predecessors, (659), 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) [2022-11-19 08:13:10,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 659 transitions. [2022-11-19 08:13:10,178 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 659 transitions. Word has length 24 [2022-11-19 08:13:10,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:13:10,179 INFO L495 AbstractCegarLoop]: Abstraction has 250 states and 659 transitions. [2022-11-19 08:13:10,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 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) [2022-11-19 08:13:10,179 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 659 transitions. [2022-11-19 08:13:10,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-19 08:13:10,182 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:13:10,182 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:13:10,195 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c7250-b662-4bbc-8c71-b695ddb2d8df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 08:13:10,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c7250-b662-4bbc-8c71-b695ddb2d8df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:13:10,389 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-19 08:13:10,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:13:10,389 INFO L85 PathProgramCache]: Analyzing trace with hash -821704537, now seen corresponding path program 2 times [2022-11-19 08:13:10,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:13:10,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186286471] [2022-11-19 08:13:10,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:13:10,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:13:10,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:13:10,724 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:13:10,725 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:13:10,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186286471] [2022-11-19 08:13:10,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186286471] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:13:10,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835904189] [2022-11-19 08:13:10,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:13:10,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:13:10,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c7250-b662-4bbc-8c71-b695ddb2d8df/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:13:10,731 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c7250-b662-4bbc-8c71-b695ddb2d8df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:13:10,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c7250-b662-4bbc-8c71-b695ddb2d8df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 08:13:10,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-19 08:13:10,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:13:10,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-19 08:13:10,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:13:11,076 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:13:11,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:13:11,510 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:13:11,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835904189] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:13:11,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [985354333] [2022-11-19 08:13:11,512 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) [2022-11-19 08:13:11,513 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:13:11,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 20 [2022-11-19 08:13:11,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751773773] [2022-11-19 08:13:11,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:13:11,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-19 08:13:11,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:13:11,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-19 08:13:11,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-11-19 08:13:11,515 INFO L87 Difference]: Start difference. First operand 250 states and 659 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 states have internal predecessors, (57), 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) [2022-11-19 08:13:15,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:13:15,099 INFO L93 Difference]: Finished difference Result 1122 states and 2850 transitions. [2022-11-19 08:13:15,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-11-19 08:13:15,100 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 states have internal predecessors, (57), 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 24 [2022-11-19 08:13:15,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:13:15,103 INFO L225 Difference]: With dead ends: 1122 [2022-11-19 08:13:15,103 INFO L226 Difference]: Without dead ends: 716 [2022-11-19 08:13:15,105 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2647 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1466, Invalid=6016, Unknown=0, NotChecked=0, Total=7482 [2022-11-19 08:13:15,106 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 591 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1430 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 591 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:13:15,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [591 Valid, 0 Invalid, 1483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1430 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-19 08:13:15,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2022-11-19 08:13:15,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 502. [2022-11-19 08:13:15,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 501 states have (on average 2.718562874251497) internal successors, (1362), 501 states have internal predecessors, (1362), 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) [2022-11-19 08:13:15,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 1362 transitions. [2022-11-19 08:13:15,128 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 1362 transitions. Word has length 24 [2022-11-19 08:13:15,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:13:15,129 INFO L495 AbstractCegarLoop]: Abstraction has 502 states and 1362 transitions. [2022-11-19 08:13:15,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 states have internal predecessors, (57), 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) [2022-11-19 08:13:15,129 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 1362 transitions. [2022-11-19 08:13:15,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-19 08:13:15,131 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:13:15,131 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:13:15,143 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c7250-b662-4bbc-8c71-b695ddb2d8df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 08:13:15,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c7250-b662-4bbc-8c71-b695ddb2d8df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:13:15,337 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-19 08:13:15,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:13:15,338 INFO L85 PathProgramCache]: Analyzing trace with hash -838311423, now seen corresponding path program 3 times [2022-11-19 08:13:15,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:13:15,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963161842] [2022-11-19 08:13:15,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:13:15,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:13:15,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:13:15,999 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:13:15,999 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:13:15,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963161842] [2022-11-19 08:13:16,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963161842] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:13:16,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518953270] [2022-11-19 08:13:16,000 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 08:13:16,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:13:16,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c7250-b662-4bbc-8c71-b695ddb2d8df/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:13:16,003 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c7250-b662-4bbc-8c71-b695ddb2d8df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:13:16,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c7250-b662-4bbc-8c71-b695ddb2d8df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 08:13:16,102 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 08:13:16,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:13:16,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-19 08:13:16,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:13:16,488 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:13:16,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:13:16,986 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:13:16,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518953270] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:13:16,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1356787595] [2022-11-19 08:13:16,987 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) [2022-11-19 08:13:16,988 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:13:16,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 30 [2022-11-19 08:13:16,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802982487] [2022-11-19 08:13:16,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:13:16,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-19 08:13:16,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:13:16,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-19 08:13:16,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=755, Unknown=0, NotChecked=0, Total=930 [2022-11-19 08:13:16,993 INFO L87 Difference]: Start difference. First operand 502 states and 1362 transitions. Second operand has 31 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 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) [2022-11-19 08:13:32,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:13:32,179 INFO L93 Difference]: Finished difference Result 2596 states and 6718 transitions. [2022-11-19 08:13:32,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 270 states. [2022-11-19 08:13:32,180 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 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 26 [2022-11-19 08:13:32,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:13:32,190 INFO L225 Difference]: With dead ends: 2596 [2022-11-19 08:13:32,190 INFO L226 Difference]: Without dead ends: 2066 [2022-11-19 08:13:32,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 287 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37758 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=11849, Invalid=71383, Unknown=0, NotChecked=0, Total=83232 [2022-11-19 08:13:32,203 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1716 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3626 mSolverCounterSat, 306 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1716 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 3932 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 306 IncrementalHoareTripleChecker+Valid, 3626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:13:32,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1716 Valid, 0 Invalid, 3932 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [306 Valid, 3626 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-11-19 08:13:32,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2066 states. [2022-11-19 08:13:32,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2066 to 886. [2022-11-19 08:13:32,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 886 states, 885 states have (on average 2.7649717514124292) internal successors, (2447), 885 states have internal predecessors, (2447), 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) [2022-11-19 08:13:32,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 2447 transitions. [2022-11-19 08:13:32,248 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 2447 transitions. Word has length 26 [2022-11-19 08:13:32,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:13:32,248 INFO L495 AbstractCegarLoop]: Abstraction has 886 states and 2447 transitions. [2022-11-19 08:13:32,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 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) [2022-11-19 08:13:32,249 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 2447 transitions. [2022-11-19 08:13:32,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-19 08:13:32,252 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:13:32,252 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:13:32,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c7250-b662-4bbc-8c71-b695ddb2d8df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-19 08:13:32,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c7250-b662-4bbc-8c71-b695ddb2d8df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-19 08:13:32,458 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-19 08:13:32,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:13:32,458 INFO L85 PathProgramCache]: Analyzing trace with hash -1537793934, now seen corresponding path program 4 times [2022-11-19 08:13:32,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:13:32,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491360148] [2022-11-19 08:13:32,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:13:32,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:13:32,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:13:33,039 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:13:33,040 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:13:33,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491360148] [2022-11-19 08:13:33,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491360148] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:13:33,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141031152] [2022-11-19 08:13:33,040 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 08:13:33,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:13:33,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c7250-b662-4bbc-8c71-b695ddb2d8df/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:13:33,043 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c7250-b662-4bbc-8c71-b695ddb2d8df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:13:33,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c7250-b662-4bbc-8c71-b695ddb2d8df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 08:13:33,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:13:33,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-19 08:13:33,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:13:33,536 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:13:33,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:13:34,380 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:13:34,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141031152] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:13:34,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [102255158] [2022-11-19 08:13:34,381 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) [2022-11-19 08:13:34,382 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:13:34,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 12] total 32 [2022-11-19 08:13:34,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137808691] [2022-11-19 08:13:34,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:13:34,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-19 08:13:34,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:13:34,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-19 08:13:34,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=829, Unknown=0, NotChecked=0, Total=1056 [2022-11-19 08:13:34,386 INFO L87 Difference]: Start difference. First operand 886 states and 2447 transitions. Second operand has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 states have internal predecessors, (67), 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) [2022-11-19 08:13:41,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:13:41,310 INFO L93 Difference]: Finished difference Result 2126 states and 5743 transitions. [2022-11-19 08:13:41,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-11-19 08:13:41,311 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 states have internal predecessors, (67), 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 28 [2022-11-19 08:13:41,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:13:41,320 INFO L225 Difference]: With dead ends: 2126 [2022-11-19 08:13:41,320 INFO L226 Difference]: Without dead ends: 1908 [2022-11-19 08:13:41,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8162 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=4011, Invalid=17451, Unknown=0, NotChecked=0, Total=21462 [2022-11-19 08:13:41,323 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 838 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2248 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 838 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 2248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-19 08:13:41,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [838 Valid, 0 Invalid, 2396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 2248 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-19 08:13:41,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1908 states. [2022-11-19 08:13:41,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1908 to 1170. [2022-11-19 08:13:41,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1170 states, 1169 states have (on average 2.765611633875107) internal successors, (3233), 1169 states have internal predecessors, (3233), 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) [2022-11-19 08:13:41,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1170 states to 1170 states and 3233 transitions. [2022-11-19 08:13:41,375 INFO L78 Accepts]: Start accepts. Automaton has 1170 states and 3233 transitions. Word has length 28 [2022-11-19 08:13:41,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:13:41,375 INFO L495 AbstractCegarLoop]: Abstraction has 1170 states and 3233 transitions. [2022-11-19 08:13:41,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 states have internal predecessors, (67), 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) [2022-11-19 08:13:41,376 INFO L276 IsEmpty]: Start isEmpty. Operand 1170 states and 3233 transitions. [2022-11-19 08:13:41,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-19 08:13:41,379 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:13:41,379 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:13:41,393 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c7250-b662-4bbc-8c71-b695ddb2d8df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-19 08:13:41,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c7250-b662-4bbc-8c71-b695ddb2d8df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:13:41,585 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-19 08:13:41,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:13:41,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1885626389, now seen corresponding path program 5 times [2022-11-19 08:13:41,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:13:41,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210008246] [2022-11-19 08:13:41,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:13:41,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:13:41,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:13:42,415 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:13:42,415 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:13:42,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210008246] [2022-11-19 08:13:42,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210008246] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:13:42,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929071584] [2022-11-19 08:13:42,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:13:42,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:13:42,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c7250-b662-4bbc-8c71-b695ddb2d8df/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:13:42,419 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c7250-b662-4bbc-8c71-b695ddb2d8df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:13:42,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c7250-b662-4bbc-8c71-b695ddb2d8df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 08:13:42,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-19 08:13:42,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:13:42,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-19 08:13:42,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:13:42,905 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:13:42,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:13:43,584 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:13:43,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929071584] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:13:43,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [829264686] [2022-11-19 08:13:43,585 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) [2022-11-19 08:13:43,586 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:13:43,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 31 [2022-11-19 08:13:43,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320814359] [2022-11-19 08:13:43,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:13:43,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-19 08:13:43,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:13:43,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-19 08:13:43,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=801, Unknown=0, NotChecked=0, Total=992 [2022-11-19 08:13:43,588 INFO L87 Difference]: Start difference. First operand 1170 states and 3233 transitions. Second operand has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 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) [2022-11-19 08:13:58,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:13:58,703 INFO L93 Difference]: Finished difference Result 4394 states and 12187 transitions. [2022-11-19 08:13:58,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 228 states. [2022-11-19 08:13:58,704 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 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 28 [2022-11-19 08:13:58,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:13:58,728 INFO L225 Difference]: With dead ends: 4394 [2022-11-19 08:13:58,728 INFO L226 Difference]: Without dead ends: 4024 [2022-11-19 08:13:58,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 250 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28128 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=9026, Invalid=54226, Unknown=0, NotChecked=0, Total=63252 [2022-11-19 08:13:58,737 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 925 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2601 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 925 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 2601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:13:58,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [925 Valid, 0 Invalid, 2756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 2601 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-11-19 08:13:58,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4024 states. [2022-11-19 08:13:58,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4024 to 1878. [2022-11-19 08:13:58,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1878 states, 1877 states have (on average 2.808204581779435) internal successors, (5271), 1877 states have internal predecessors, (5271), 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) [2022-11-19 08:13:58,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1878 states to 1878 states and 5271 transitions. [2022-11-19 08:13:58,834 INFO L78 Accepts]: Start accepts. Automaton has 1878 states and 5271 transitions. Word has length 28 [2022-11-19 08:13:58,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:13:58,834 INFO L495 AbstractCegarLoop]: Abstraction has 1878 states and 5271 transitions. [2022-11-19 08:13:58,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 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) [2022-11-19 08:13:58,835 INFO L276 IsEmpty]: Start isEmpty. Operand 1878 states and 5271 transitions. [2022-11-19 08:13:58,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-19 08:13:58,841 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:13:58,841 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:13:58,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c7250-b662-4bbc-8c71-b695ddb2d8df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-19 08:13:59,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c7250-b662-4bbc-8c71-b695ddb2d8df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-19 08:13:59,051 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-19 08:13:59,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:13:59,052 INFO L85 PathProgramCache]: Analyzing trace with hash -167144747, now seen corresponding path program 6 times [2022-11-19 08:13:59,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:13:59,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612033423] [2022-11-19 08:13:59,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:13:59,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:13:59,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:13:59,840 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:13:59,841 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:13:59,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612033423] [2022-11-19 08:13:59,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612033423] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:13:59,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784833883] [2022-11-19 08:13:59,841 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 08:13:59,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:13:59,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c7250-b662-4bbc-8c71-b695ddb2d8df/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:13:59,847 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c7250-b662-4bbc-8c71-b695ddb2d8df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:13:59,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c7250-b662-4bbc-8c71-b695ddb2d8df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-19 08:13:59,984 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 08:13:59,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:13:59,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-19 08:13:59,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:14:00,493 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:14:00,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:14:01,392 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:14:01,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784833883] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:14:01,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2123529444] [2022-11-19 08:14:01,393 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) [2022-11-19 08:14:01,394 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:14:01,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 12] total 34 [2022-11-19 08:14:01,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358048920] [2022-11-19 08:14:01,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:14:01,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-19 08:14:01,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:14:01,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-19 08:14:01,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=980, Unknown=0, NotChecked=0, Total=1190 [2022-11-19 08:14:01,396 INFO L87 Difference]: Start difference. First operand 1878 states and 5271 transitions. Second operand has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 34 states have internal predecessors, (71), 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) [2022-11-19 08:14:14,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:14:14,243 INFO L93 Difference]: Finished difference Result 4818 states and 13257 transitions. [2022-11-19 08:14:14,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 185 states. [2022-11-19 08:14:14,244 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 34 states have internal predecessors, (71), 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 28 [2022-11-19 08:14:14,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:14:14,265 INFO L225 Difference]: With dead ends: 4818 [2022-11-19 08:14:14,265 INFO L226 Difference]: Without dead ends: 4442 [2022-11-19 08:14:14,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17624 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=7086, Invalid=36386, Unknown=0, NotChecked=0, Total=43472 [2022-11-19 08:14:14,270 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 928 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4306 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 928 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 4496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 4306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:14:14,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [928 Valid, 0 Invalid, 4496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 4306 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-11-19 08:14:14,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4442 states. [2022-11-19 08:14:14,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4442 to 3200. [2022-11-19 08:14:14,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3200 states, 3199 states have (on average 2.796186308221319) internal successors, (8945), 3199 states have internal predecessors, (8945), 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) [2022-11-19 08:14:14,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3200 states to 3200 states and 8945 transitions. [2022-11-19 08:14:14,398 INFO L78 Accepts]: Start accepts. Automaton has 3200 states and 8945 transitions. Word has length 28 [2022-11-19 08:14:14,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:14:14,399 INFO L495 AbstractCegarLoop]: Abstraction has 3200 states and 8945 transitions. [2022-11-19 08:14:14,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 34 states have internal predecessors, (71), 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) [2022-11-19 08:14:14,399 INFO L276 IsEmpty]: Start isEmpty. Operand 3200 states and 8945 transitions. [2022-11-19 08:14:14,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-19 08:14:14,407 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:14:14,408 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:14:14,418 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c7250-b662-4bbc-8c71-b695ddb2d8df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-19 08:14:14,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c7250-b662-4bbc-8c71-b695ddb2d8df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-19 08:14:14,619 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-19 08:14:14,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:14:14,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1232804010, now seen corresponding path program 7 times [2022-11-19 08:14:14,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:14:14,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606715982] [2022-11-19 08:14:14,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:14:14,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:14:14,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:14:15,300 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:14:15,301 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:14:15,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606715982] [2022-11-19 08:14:15,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606715982] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:14:15,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065892165] [2022-11-19 08:14:15,301 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 08:14:15,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:14:15,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c7250-b662-4bbc-8c71-b695ddb2d8df/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:14:15,303 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c7250-b662-4bbc-8c71-b695ddb2d8df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:14:15,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c7250-b662-4bbc-8c71-b695ddb2d8df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-19 08:14:15,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:14:15,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-19 08:14:15,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:14:15,840 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:14:15,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:14:16,681 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:14:16,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065892165] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:14:16,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1209262841] [2022-11-19 08:14:16,683 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) [2022-11-19 08:14:16,684 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:14:16,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 14] total 36 [2022-11-19 08:14:16,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214574288] [2022-11-19 08:14:16,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:14:16,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-19 08:14:16,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:14:16,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-19 08:14:16,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=1079, Unknown=0, NotChecked=0, Total=1332 [2022-11-19 08:14:16,689 INFO L87 Difference]: Start difference. First operand 3200 states and 8945 transitions. Second operand has 37 states, 37 states have (on average 1.9189189189189189) internal successors, (71), 36 states have internal predecessors, (71), 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) [2022-11-19 08:14:31,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:14:31,944 INFO L93 Difference]: Finished difference Result 8354 states and 23080 transitions. [2022-11-19 08:14:31,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 241 states. [2022-11-19 08:14:31,945 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.9189189189189189) internal successors, (71), 36 states have internal predecessors, (71), 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 28 [2022-11-19 08:14:31,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:14:31,978 INFO L225 Difference]: With dead ends: 8354 [2022-11-19 08:14:31,978 INFO L226 Difference]: Without dead ends: 7914 [2022-11-19 08:14:31,982 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 264 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30819 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=11965, Invalid=58525, Unknown=0, NotChecked=0, Total=70490 [2022-11-19 08:14:31,983 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 969 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5537 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 969 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 5704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 5537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-11-19 08:14:31,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [969 Valid, 0 Invalid, 5704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 5537 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-11-19 08:14:31,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7914 states. [2022-11-19 08:14:32,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7914 to 6584. [2022-11-19 08:14:32,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6584 states, 6583 states have (on average 2.793103448275862) internal successors, (18387), 6583 states have internal predecessors, (18387), 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) [2022-11-19 08:14:32,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6584 states to 6584 states and 18387 transitions. [2022-11-19 08:14:32,187 INFO L78 Accepts]: Start accepts. Automaton has 6584 states and 18387 transitions. Word has length 28 [2022-11-19 08:14:32,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:14:32,188 INFO L495 AbstractCegarLoop]: Abstraction has 6584 states and 18387 transitions. [2022-11-19 08:14:32,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.9189189189189189) internal successors, (71), 36 states have internal predecessors, (71), 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) [2022-11-19 08:14:32,188 INFO L276 IsEmpty]: Start isEmpty. Operand 6584 states and 18387 transitions. [2022-11-19 08:14:32,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-19 08:14:32,205 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:14:32,205 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:14:32,214 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c7250-b662-4bbc-8c71-b695ddb2d8df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-19 08:14:32,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c7250-b662-4bbc-8c71-b695ddb2d8df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-19 08:14:32,410 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-19 08:14:32,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:14:32,411 INFO L85 PathProgramCache]: Analyzing trace with hash -775002564, now seen corresponding path program 8 times [2022-11-19 08:14:32,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:14:32,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917546700] [2022-11-19 08:14:32,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:14:32,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:14:32,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:14:33,032 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:14:33,033 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:14:33,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917546700] [2022-11-19 08:14:33,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917546700] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:14:33,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94730050] [2022-11-19 08:14:33,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:14:33,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:14:33,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c7250-b662-4bbc-8c71-b695ddb2d8df/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:14:33,034 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c7250-b662-4bbc-8c71-b695ddb2d8df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:14:33,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c7250-b662-4bbc-8c71-b695ddb2d8df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-19 08:14:33,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-19 08:14:33,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:14:33,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-19 08:14:33,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:14:33,522 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:14:33,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:14:34,177 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:14:34,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94730050] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:14:34,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2078610458] [2022-11-19 08:14:34,178 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) [2022-11-19 08:14:34,180 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:14:34,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 11] total 33 [2022-11-19 08:14:34,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263008623] [2022-11-19 08:14:34,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:14:34,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-19 08:14:34,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:14:34,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-19 08:14:34,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=946, Unknown=0, NotChecked=0, Total=1122 [2022-11-19 08:14:34,182 INFO L87 Difference]: Start difference. First operand 6584 states and 18387 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 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) [2022-11-19 08:14:51,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:14:51,072 INFO L93 Difference]: Finished difference Result 13396 states and 37416 transitions. [2022-11-19 08:14:51,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 265 states. [2022-11-19 08:14:51,072 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 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 28 [2022-11-19 08:14:51,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:14:51,111 INFO L225 Difference]: With dead ends: 13396 [2022-11-19 08:14:51,111 INFO L226 Difference]: Without dead ends: 12882 [2022-11-19 08:14:51,116 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 288 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35624 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=13890, Invalid=69920, Unknown=0, NotChecked=0, Total=83810 [2022-11-19 08:14:51,117 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 816 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4976 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 816 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 5136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 4976 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:14:51,118 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [816 Valid, 0 Invalid, 5136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 4976 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-11-19 08:14:51,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12882 states. [2022-11-19 08:14:51,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12882 to 12464. [2022-11-19 08:14:51,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12464 states, 12463 states have (on average 2.7923453422129505) internal successors, (34801), 12463 states have internal predecessors, (34801), 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) [2022-11-19 08:14:51,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12464 states to 12464 states and 34801 transitions. [2022-11-19 08:14:51,450 INFO L78 Accepts]: Start accepts. Automaton has 12464 states and 34801 transitions. Word has length 28 [2022-11-19 08:14:51,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:14:51,450 INFO L495 AbstractCegarLoop]: Abstraction has 12464 states and 34801 transitions. [2022-11-19 08:14:51,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 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) [2022-11-19 08:14:51,451 INFO L276 IsEmpty]: Start isEmpty. Operand 12464 states and 34801 transitions. [2022-11-19 08:14:51,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-19 08:14:51,476 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:14:51,477 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:14:51,484 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c7250-b662-4bbc-8c71-b695ddb2d8df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-19 08:14:51,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c7250-b662-4bbc-8c71-b695ddb2d8df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:14:51,682 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-19 08:14:51,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:14:51,683 INFO L85 PathProgramCache]: Analyzing trace with hash 899722154, now seen corresponding path program 9 times [2022-11-19 08:14:51,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:14:51,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105115956] [2022-11-19 08:14:51,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:14:51,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:14:51,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:14:52,448 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:14:52,449 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:14:52,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105115956] [2022-11-19 08:14:52,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105115956] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:14:52,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299954035] [2022-11-19 08:14:52,449 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 08:14:52,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:14:52,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c7250-b662-4bbc-8c71-b695ddb2d8df/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:14:52,451 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c7250-b662-4bbc-8c71-b695ddb2d8df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:14:52,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c7250-b662-4bbc-8c71-b695ddb2d8df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-19 08:14:52,556 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 08:14:52,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:14:52,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-19 08:14:52,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:14:53,013 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:14:53,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:14:53,887 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:14:53,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299954035] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:14:53,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [868385555] [2022-11-19 08:14:53,888 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) [2022-11-19 08:14:53,891 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:14:53,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 14] total 38 [2022-11-19 08:14:53,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273301721] [2022-11-19 08:14:53,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:14:53,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-19 08:14:53,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:14:53,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-19 08:14:53,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=1213, Unknown=0, NotChecked=0, Total=1482 [2022-11-19 08:14:53,893 INFO L87 Difference]: Start difference. First operand 12464 states and 34801 transitions. Second operand has 39 states, 39 states have (on average 1.8205128205128205) internal successors, (71), 38 states have internal predecessors, (71), 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) [2022-11-19 08:15:24,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:15:24,913 INFO L93 Difference]: Finished difference Result 27050 states and 75585 transitions. [2022-11-19 08:15:24,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 402 states. [2022-11-19 08:15:24,914 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8205128205128205) internal successors, (71), 38 states have internal predecessors, (71), 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 28 [2022-11-19 08:15:24,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:15:24,996 INFO L225 Difference]: With dead ends: 27050 [2022-11-19 08:15:24,996 INFO L226 Difference]: Without dead ends: 26326 [2022-11-19 08:15:25,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 455 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 425 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84004 ImplicationChecksByTransitivity, 26.6s TimeCoverageRelationStatistics Valid=29126, Invalid=152776, Unknown=0, NotChecked=0, Total=181902 [2022-11-19 08:15:25,008 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1210 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 6172 mSolverCounterSat, 264 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1210 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 6436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 264 IncrementalHoareTripleChecker+Valid, 6172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-11-19 08:15:25,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1210 Valid, 0 Invalid, 6436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [264 Valid, 6172 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2022-11-19 08:15:25,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26326 states. [2022-11-19 08:15:25,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26326 to 23920. [2022-11-19 08:15:25,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23920 states, 23919 states have (on average 2.795309168443497) internal successors, (66861), 23919 states have internal predecessors, (66861), 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) [2022-11-19 08:15:25,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23920 states to 23920 states and 66861 transitions. [2022-11-19 08:15:25,994 INFO L78 Accepts]: Start accepts. Automaton has 23920 states and 66861 transitions. Word has length 28 [2022-11-19 08:15:25,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:15:25,995 INFO L495 AbstractCegarLoop]: Abstraction has 23920 states and 66861 transitions. [2022-11-19 08:15:25,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.8205128205128205) internal successors, (71), 38 states have internal predecessors, (71), 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) [2022-11-19 08:15:25,995 INFO L276 IsEmpty]: Start isEmpty. Operand 23920 states and 66861 transitions. [2022-11-19 08:15:26,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-19 08:15:26,060 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:15:26,061 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:15:26,071 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c7250-b662-4bbc-8c71-b695ddb2d8df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-19 08:15:26,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c7250-b662-4bbc-8c71-b695ddb2d8df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-19 08:15:26,271 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-19 08:15:26,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:15:26,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1735625364, now seen corresponding path program 10 times [2022-11-19 08:15:26,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:15:26,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380469530] [2022-11-19 08:15:26,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:15:26,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:15:26,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:15:27,153 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:15:27,153 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:15:27,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380469530] [2022-11-19 08:15:27,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380469530] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:15:27,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340629938] [2022-11-19 08:15:27,153 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 08:15:27,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:15:27,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c7250-b662-4bbc-8c71-b695ddb2d8df/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:15:27,159 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c7250-b662-4bbc-8c71-b695ddb2d8df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:15:27,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c7250-b662-4bbc-8c71-b695ddb2d8df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-19 08:15:27,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:15:27,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-19 08:15:27,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:15:27,665 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:15:27,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:15:28,442 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:15:28,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340629938] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:15:28,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [659711392] [2022-11-19 08:15:28,443 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) [2022-11-19 08:15:28,444 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:15:28,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 14] total 37 [2022-11-19 08:15:28,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454829136] [2022-11-19 08:15:28,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:15:28,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-19 08:15:28,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:15:28,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-19 08:15:28,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=1141, Unknown=0, NotChecked=0, Total=1406 [2022-11-19 08:15:28,446 INFO L87 Difference]: Start difference. First operand 23920 states and 66861 transitions. Second operand has 38 states, 38 states have (on average 1.868421052631579) internal successors, (71), 37 states have internal predecessors, (71), 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) [2022-11-19 08:15:43,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:15:43,262 INFO L93 Difference]: Finished difference Result 35802 states and 100145 transitions. [2022-11-19 08:15:43,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 225 states. [2022-11-19 08:15:43,263 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.868421052631579) internal successors, (71), 37 states have internal predecessors, (71), 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 28 [2022-11-19 08:15:43,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:15:43,362 INFO L225 Difference]: With dead ends: 35802 [2022-11-19 08:15:43,362 INFO L226 Difference]: Without dead ends: 35436 [2022-11-19 08:15:43,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 250 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27153 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=8298, Invalid=54954, Unknown=0, NotChecked=0, Total=63252 [2022-11-19 08:15:43,367 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 877 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4323 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 877 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 4483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 4323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:15:43,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [877 Valid, 0 Invalid, 4483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 4323 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-11-19 08:15:43,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35436 states. [2022-11-19 08:15:44,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35436 to 32524. [2022-11-19 08:15:44,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32524 states, 32523 states have (on average 2.792731297850752) internal successors, (90828), 32523 states have internal predecessors, (90828), 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) [2022-11-19 08:15:44,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32524 states to 32524 states and 90828 transitions. [2022-11-19 08:15:44,358 INFO L78 Accepts]: Start accepts. Automaton has 32524 states and 90828 transitions. Word has length 28 [2022-11-19 08:15:44,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:15:44,358 INFO L495 AbstractCegarLoop]: Abstraction has 32524 states and 90828 transitions. [2022-11-19 08:15:44,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.868421052631579) internal successors, (71), 37 states have internal predecessors, (71), 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) [2022-11-19 08:15:44,359 INFO L276 IsEmpty]: Start isEmpty. Operand 32524 states and 90828 transitions. [2022-11-19 08:15:44,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-19 08:15:44,415 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:15:44,416 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:15:44,421 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c7250-b662-4bbc-8c71-b695ddb2d8df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-19 08:15:44,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c7250-b662-4bbc-8c71-b695ddb2d8df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-19 08:15:44,617 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-19 08:15:44,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:15:44,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1437884298, now seen corresponding path program 11 times [2022-11-19 08:15:44,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:15:44,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492975188] [2022-11-19 08:15:44,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:15:44,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:15:44,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:15:45,432 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:15:45,432 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:15:45,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492975188] [2022-11-19 08:15:45,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492975188] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:15:45,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12304489] [2022-11-19 08:15:45,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:15:45,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:15:45,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c7250-b662-4bbc-8c71-b695ddb2d8df/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:15:45,435 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c7250-b662-4bbc-8c71-b695ddb2d8df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:15:45,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c7250-b662-4bbc-8c71-b695ddb2d8df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-19 08:15:45,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-19 08:15:45,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:15:45,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-19 08:15:45,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:15:45,950 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:15:45,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:15:46,558 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:15:46,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12304489] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:15:46,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1083429603] [2022-11-19 08:15:46,559 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) [2022-11-19 08:15:46,560 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:15:46,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 11] total 32 [2022-11-19 08:15:46,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433144557] [2022-11-19 08:15:46,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:15:46,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-19 08:15:46,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:15:46,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-19 08:15:46,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=873, Unknown=0, NotChecked=0, Total=1056 [2022-11-19 08:15:46,563 INFO L87 Difference]: Start difference. First operand 32524 states and 90828 transitions. Second operand has 33 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 32 states have internal predecessors, (71), 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) [2022-11-19 08:15:57,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:15:57,149 INFO L93 Difference]: Finished difference Result 49080 states and 137649 transitions. [2022-11-19 08:15:57,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 186 states. [2022-11-19 08:15:57,149 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 32 states have internal predecessors, (71), 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 28 [2022-11-19 08:15:57,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:15:57,264 INFO L225 Difference]: With dead ends: 49080 [2022-11-19 08:15:57,264 INFO L226 Difference]: Without dead ends: 48750 [2022-11-19 08:15:57,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18507 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=6220, Invalid=37252, Unknown=0, NotChecked=0, Total=43472 [2022-11-19 08:15:57,268 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 743 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4101 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 743 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 4206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 4101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-19 08:15:57,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [743 Valid, 0 Invalid, 4206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 4101 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-11-19 08:15:57,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48750 states. [2022-11-19 08:15:58,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48750 to 46844. [2022-11-19 08:15:58,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46844 states, 46843 states have (on average 2.7901287278782316) internal successors, (130698), 46843 states have internal predecessors, (130698), 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) [2022-11-19 08:15:58,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46844 states to 46844 states and 130698 transitions. [2022-11-19 08:15:58,566 INFO L78 Accepts]: Start accepts. Automaton has 46844 states and 130698 transitions. Word has length 28 [2022-11-19 08:15:58,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:15:58,567 INFO L495 AbstractCegarLoop]: Abstraction has 46844 states and 130698 transitions. [2022-11-19 08:15:58,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 32 states have internal predecessors, (71), 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) [2022-11-19 08:15:58,567 INFO L276 IsEmpty]: Start isEmpty. Operand 46844 states and 130698 transitions. [2022-11-19 08:15:58,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-19 08:15:58,902 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:15:58,902 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:15:58,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c7250-b662-4bbc-8c71-b695ddb2d8df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-19 08:15:59,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c7250-b662-4bbc-8c71-b695ddb2d8df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:15:59,108 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-19 08:15:59,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:15:59,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1691515456, now seen corresponding path program 12 times [2022-11-19 08:15:59,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:15:59,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838566479] [2022-11-19 08:15:59,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:15:59,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:15:59,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:15:59,962 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:15:59,963 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:15:59,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838566479] [2022-11-19 08:15:59,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838566479] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:15:59,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686949228] [2022-11-19 08:15:59,963 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 08:15:59,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:15:59,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c7250-b662-4bbc-8c71-b695ddb2d8df/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:15:59,964 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c7250-b662-4bbc-8c71-b695ddb2d8df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:15:59,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c7250-b662-4bbc-8c71-b695ddb2d8df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-19 08:16:00,077 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 08:16:00,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:16:00,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-19 08:16:00,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:16:00,538 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:16:00,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:16:01,547 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:16:01,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686949228] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:16:01,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [785244898] [2022-11-19 08:16:01,548 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) [2022-11-19 08:16:01,549 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:16:01,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16, 14] total 40 [2022-11-19 08:16:01,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284017849] [2022-11-19 08:16:01,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:16:01,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-19 08:16:01,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:16:01,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-19 08:16:01,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=1347, Unknown=0, NotChecked=0, Total=1640 [2022-11-19 08:16:01,551 INFO L87 Difference]: Start difference. First operand 46844 states and 130698 transitions. Second operand has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 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) [2022-11-19 08:16:22,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:16:22,370 INFO L93 Difference]: Finished difference Result 104356 states and 293676 transitions. [2022-11-19 08:16:22,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 323 states. [2022-11-19 08:16:22,370 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 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 30 [2022-11-19 08:16:22,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:16:22,680 INFO L225 Difference]: With dead ends: 104356 [2022-11-19 08:16:22,680 INFO L226 Difference]: Without dead ends: 103778 [2022-11-19 08:16:22,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 347 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55535 ImplicationChecksByTransitivity, 16.4s TimeCoverageRelationStatistics Valid=17641, Invalid=103811, Unknown=0, NotChecked=0, Total=121452 [2022-11-19 08:16:22,687 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1536 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5999 mSolverCounterSat, 410 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1536 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 6409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 410 IncrementalHoareTripleChecker+Valid, 5999 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:16:22,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1536 Valid, 0 Invalid, 6409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [410 Valid, 5999 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-11-19 08:16:22,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103778 states. [2022-11-19 08:16:24,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103778 to 70208. [2022-11-19 08:16:24,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70208 states, 70207 states have (on average 2.7832409873659323) internal successors, (195403), 70207 states have internal predecessors, (195403), 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) [2022-11-19 08:16:24,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70208 states to 70208 states and 195403 transitions. [2022-11-19 08:16:24,976 INFO L78 Accepts]: Start accepts. Automaton has 70208 states and 195403 transitions. Word has length 30 [2022-11-19 08:16:24,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:16:24,977 INFO L495 AbstractCegarLoop]: Abstraction has 70208 states and 195403 transitions. [2022-11-19 08:16:24,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 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) [2022-11-19 08:16:24,977 INFO L276 IsEmpty]: Start isEmpty. Operand 70208 states and 195403 transitions. [2022-11-19 08:16:25,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-19 08:16:25,374 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:16:25,374 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:16:25,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c7250-b662-4bbc-8c71-b695ddb2d8df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-19 08:16:25,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c7250-b662-4bbc-8c71-b695ddb2d8df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:16:25,580 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-19 08:16:25,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:16:25,581 INFO L85 PathProgramCache]: Analyzing trace with hash -470585305, now seen corresponding path program 13 times [2022-11-19 08:16:25,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:16:25,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604486765] [2022-11-19 08:16:25,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:16:25,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:16:25,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:16:26,687 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:16:26,687 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:16:26,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604486765] [2022-11-19 08:16:26,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604486765] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:16:26,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670131339] [2022-11-19 08:16:26,688 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 08:16:26,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:16:26,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c7250-b662-4bbc-8c71-b695ddb2d8df/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:16:26,690 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c7250-b662-4bbc-8c71-b695ddb2d8df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:16:26,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c7250-b662-4bbc-8c71-b695ddb2d8df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-19 08:16:26,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:16:26,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-19 08:16:26,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:16:27,442 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:16:27,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:16:28,428 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:16:28,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670131339] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:16:28,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1554971015] [2022-11-19 08:16:28,429 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) [2022-11-19 08:16:28,429 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:16:28,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 16] total 42 [2022-11-19 08:16:28,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715403844] [2022-11-19 08:16:28,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:16:28,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-19 08:16:28,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:16:28,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-19 08:16:28,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=1516, Unknown=0, NotChecked=0, Total=1806 [2022-11-19 08:16:28,432 INFO L87 Difference]: Start difference. First operand 70208 states and 195403 transitions. Second operand has 43 states, 43 states have (on average 1.7209302325581395) internal successors, (74), 42 states have internal predecessors, (74), 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) [2022-11-19 08:17:15,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:17:15,116 INFO L93 Difference]: Finished difference Result 174734 states and 489936 transitions. [2022-11-19 08:17:15,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 543 states. [2022-11-19 08:17:15,117 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7209302325581395) internal successors, (74), 42 states have internal predecessors, (74), 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 30 [2022-11-19 08:17:15,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:17:15,607 INFO L225 Difference]: With dead ends: 174734 [2022-11-19 08:17:15,607 INFO L226 Difference]: Without dead ends: 173992 [2022-11-19 08:17:15,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 604 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 573 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159860 ImplicationChecksByTransitivity, 39.9s TimeCoverageRelationStatistics Valid=44951, Invalid=285099, Unknown=0, NotChecked=0, Total=330050 [2022-11-19 08:17:15,623 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2248 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 6903 mSolverCounterSat, 459 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2248 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 7362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 459 IncrementalHoareTripleChecker+Valid, 6903 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2022-11-19 08:17:15,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2248 Valid, 0 Invalid, 7362 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [459 Valid, 6903 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2022-11-19 08:17:15,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173992 states. [2022-11-19 08:17:18,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173992 to 105208. [2022-11-19 08:17:18,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105208 states, 105207 states have (on average 2.7806229623504137) internal successors, (292541), 105207 states have internal predecessors, (292541), 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) [2022-11-19 08:17:19,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105208 states to 105208 states and 292541 transitions. [2022-11-19 08:17:19,403 INFO L78 Accepts]: Start accepts. Automaton has 105208 states and 292541 transitions. Word has length 30 [2022-11-19 08:17:19,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:17:19,404 INFO L495 AbstractCegarLoop]: Abstraction has 105208 states and 292541 transitions. [2022-11-19 08:17:19,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7209302325581395) internal successors, (74), 42 states have internal predecessors, (74), 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) [2022-11-19 08:17:19,404 INFO L276 IsEmpty]: Start isEmpty. Operand 105208 states and 292541 transitions. [2022-11-19 08:17:19,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-19 08:17:19,583 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:17:19,584 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:17:19,590 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c7250-b662-4bbc-8c71-b695ddb2d8df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-19 08:17:19,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c7250-b662-4bbc-8c71-b695ddb2d8df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-19 08:17:19,784 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-19 08:17:19,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:17:19,785 INFO L85 PathProgramCache]: Analyzing trace with hash -821769478, now seen corresponding path program 14 times [2022-11-19 08:17:19,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:17:19,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119634224] [2022-11-19 08:17:19,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:17:19,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:17:19,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:17:20,749 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:17:20,749 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:17:20,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119634224] [2022-11-19 08:17:20,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119634224] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:17:20,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864626669] [2022-11-19 08:17:20,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:17:20,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:17:20,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c7250-b662-4bbc-8c71-b695ddb2d8df/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:17:20,755 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c7250-b662-4bbc-8c71-b695ddb2d8df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:17:20,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c7250-b662-4bbc-8c71-b695ddb2d8df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-19 08:17:20,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-19 08:17:20,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:17:20,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-19 08:17:20,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:17:21,227 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:17:21,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:17:21,914 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 08:17:21,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864626669] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:17:21,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [494263813] [2022-11-19 08:17:21,915 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) [2022-11-19 08:17:21,916 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:17:21,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 9] total 32 [2022-11-19 08:17:21,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466725140] [2022-11-19 08:17:21,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:17:21,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-19 08:17:21,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:17:21,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-19 08:17:21,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=875, Unknown=0, NotChecked=0, Total=1056 [2022-11-19 08:17:21,919 INFO L87 Difference]: Start difference. First operand 105208 states and 292541 transitions. Second operand has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 states have internal predecessors, (73), 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) [2022-11-19 08:17:33,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:17:33,169 INFO L93 Difference]: Finished difference Result 198722 states and 555556 transitions. [2022-11-19 08:17:33,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 180 states. [2022-11-19 08:17:33,170 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 states have internal predecessors, (73), 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 30 [2022-11-19 08:17:33,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:17:34,077 INFO L225 Difference]: With dead ends: 198722 [2022-11-19 08:17:34,077 INFO L226 Difference]: Without dead ends: 198074 [2022-11-19 08:17:34,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17774 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=7068, Invalid=34344, Unknown=0, NotChecked=0, Total=41412 [2022-11-19 08:17:34,080 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1140 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3172 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1140 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 3309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 3172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:17:34,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1140 Valid, 0 Invalid, 3309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 3172 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-19 08:17:34,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198074 states. [2022-11-19 08:17:38,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198074 to 179076. [2022-11-19 08:17:38,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179076 states, 179075 states have (on average 2.7777076643864302) internal successors, (497418), 179075 states have internal predecessors, (497418), 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) [2022-11-19 08:17:39,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179076 states to 179076 states and 497418 transitions. [2022-11-19 08:17:39,638 INFO L78 Accepts]: Start accepts. Automaton has 179076 states and 497418 transitions. Word has length 30 [2022-11-19 08:17:39,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:17:39,638 INFO L495 AbstractCegarLoop]: Abstraction has 179076 states and 497418 transitions. [2022-11-19 08:17:39,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 states have internal predecessors, (73), 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) [2022-11-19 08:17:39,639 INFO L276 IsEmpty]: Start isEmpty. Operand 179076 states and 497418 transitions. [2022-11-19 08:17:40,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-19 08:17:40,002 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:17:40,002 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:17:40,010 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c7250-b662-4bbc-8c71-b695ddb2d8df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-19 08:17:40,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c7250-b662-4bbc-8c71-b695ddb2d8df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-19 08:17:40,203 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-19 08:17:40,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:17:40,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1904674723, now seen corresponding path program 15 times [2022-11-19 08:17:40,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:17:40,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096698145] [2022-11-19 08:17:40,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:17:40,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:17:40,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:17:41,785 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:17:41,786 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:17:41,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096698145] [2022-11-19 08:17:41,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096698145] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:17:41,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342432338] [2022-11-19 08:17:41,786 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 08:17:41,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:17:41,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c7250-b662-4bbc-8c71-b695ddb2d8df/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:17:41,788 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c7250-b662-4bbc-8c71-b695ddb2d8df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:17:41,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c7250-b662-4bbc-8c71-b695ddb2d8df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-19 08:17:41,891 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 08:17:41,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:17:41,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-19 08:17:41,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:17:42,451 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:17:42,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:17:43,449 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:17:43,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342432338] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:17:43,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [807955877] [2022-11-19 08:17:43,449 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) [2022-11-19 08:17:43,450 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:17:43,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18, 14] total 44 [2022-11-19 08:17:43,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489628365] [2022-11-19 08:17:43,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:17:43,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-19 08:17:43,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:17:43,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-19 08:17:43,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=1663, Unknown=0, NotChecked=0, Total=1980 [2022-11-19 08:17:43,452 INFO L87 Difference]: Start difference. First operand 179076 states and 497418 transitions. Second operand has 45 states, 45 states have (on average 1.8222222222222222) internal successors, (82), 44 states have internal predecessors, (82), 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) [2022-11-19 08:18:32,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:18:32,864 INFO L93 Difference]: Finished difference Result 337900 states and 942998 transitions. [2022-11-19 08:18:32,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 567 states. [2022-11-19 08:18:32,864 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.8222222222222222) internal successors, (82), 44 states have internal predecessors, (82), 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 32 [2022-11-19 08:18:32,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:18:34,142 INFO L225 Difference]: With dead ends: 337900 [2022-11-19 08:18:34,142 INFO L226 Difference]: Without dead ends: 337110 [2022-11-19 08:18:34,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 631 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 595 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170915 ImplicationChecksByTransitivity, 41.3s TimeCoverageRelationStatistics Valid=46121, Invalid=309691, Unknown=0, NotChecked=0, Total=355812 [2022-11-19 08:18:34,156 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1994 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 8980 mSolverCounterSat, 479 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1994 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 9459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 479 IncrementalHoareTripleChecker+Valid, 8980 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-11-19 08:18:34,156 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1994 Valid, 0 Invalid, 9459 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [479 Valid, 8980 Invalid, 0 Unknown, 0 Unchecked, 6.7s Time] [2022-11-19 08:18:34,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337110 states. [2022-11-19 08:18:41,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337110 to 248888. [2022-11-19 08:18:41,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248888 states, 248887 states have (on average 2.774291144173862) internal successors, (690485), 248887 states have internal predecessors, (690485), 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) [2022-11-19 08:18:42,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248888 states to 248888 states and 690485 transitions. [2022-11-19 08:18:42,837 INFO L78 Accepts]: Start accepts. Automaton has 248888 states and 690485 transitions. Word has length 32 [2022-11-19 08:18:42,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:18:42,837 INFO L495 AbstractCegarLoop]: Abstraction has 248888 states and 690485 transitions. [2022-11-19 08:18:42,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.8222222222222222) internal successors, (82), 44 states have internal predecessors, (82), 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) [2022-11-19 08:18:42,837 INFO L276 IsEmpty]: Start isEmpty. Operand 248888 states and 690485 transitions. [2022-11-19 08:18:43,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-19 08:18:43,847 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:18:43,847 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:18:43,856 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c7250-b662-4bbc-8c71-b695ddb2d8df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-19 08:18:44,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c7250-b662-4bbc-8c71-b695ddb2d8df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-19 08:18:44,048 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-19 08:18:44,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:18:44,049 INFO L85 PathProgramCache]: Analyzing trace with hash -328639495, now seen corresponding path program 16 times [2022-11-19 08:18:44,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:18:44,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781272410] [2022-11-19 08:18:44,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:18:44,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:18:44,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:18:44,787 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:18:44,787 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:18:44,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781272410] [2022-11-19 08:18:44,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781272410] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:18:44,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172438876] [2022-11-19 08:18:44,787 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 08:18:44,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:18:44,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c7250-b662-4bbc-8c71-b695ddb2d8df/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:18:44,791 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c7250-b662-4bbc-8c71-b695ddb2d8df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:18:44,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c7250-b662-4bbc-8c71-b695ddb2d8df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-19 08:18:44,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:18:44,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-19 08:18:44,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:18:45,434 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:18:45,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:18:46,719 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:18:46,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172438876] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:18:46,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [350586601] [2022-11-19 08:18:46,719 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) [2022-11-19 08:18:46,721 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:18:46,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18, 16] total 44 [2022-11-19 08:18:46,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590956728] [2022-11-19 08:18:46,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:18:46,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-19 08:18:46,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:18:46,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-19 08:18:46,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=1623, Unknown=0, NotChecked=0, Total=1980 [2022-11-19 08:18:46,723 INFO L87 Difference]: Start difference. First operand 248888 states and 690485 transitions. Second operand has 45 states, 45 states have (on average 1.8444444444444446) internal successors, (83), 44 states have internal predecessors, (83), 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) [2022-11-19 08:19:08,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:19:08,459 INFO L93 Difference]: Finished difference Result 296198 states and 822739 transitions. [2022-11-19 08:19:08,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 259 states. [2022-11-19 08:19:08,460 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.8444444444444446) internal successors, (83), 44 states have internal predecessors, (83), 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 32 [2022-11-19 08:19:08,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:19:08,460 INFO L225 Difference]: With dead ends: 296198 [2022-11-19 08:19:08,460 INFO L226 Difference]: Without dead ends: 0 [2022-11-19 08:19:08,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 299 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36148 ImplicationChecksByTransitivity, 17.6s TimeCoverageRelationStatistics Valid=12336, Invalid=77964, Unknown=0, NotChecked=0, Total=90300 [2022-11-19 08:19:08,464 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1069 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5586 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1069 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 5809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 5586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-11-19 08:19:08,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1069 Valid, 0 Invalid, 5809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 5586 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-11-19 08:19:08,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-19 08:19:08,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-19 08:19:08,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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) [2022-11-19 08:19:08,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-19 08:19:08,465 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 32 [2022-11-19 08:19:08,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:19:08,466 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-19 08:19:08,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.8444444444444446) internal successors, (83), 44 states have internal predecessors, (83), 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) [2022-11-19 08:19:08,466 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-19 08:19:08,466 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-19 08:19:08,469 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2022-11-19 08:19:08,469 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2022-11-19 08:19:08,469 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2022-11-19 08:19:08,469 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2022-11-19 08:19:08,474 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c7250-b662-4bbc-8c71-b695ddb2d8df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-19 08:19:08,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c7250-b662-4bbc-8c71-b695ddb2d8df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-19 08:19:08,672 INFO L444 BasicCegarLoop]: Path program histogram: [16, 4, 2, 2] [2022-11-19 08:19:08,674 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-11-19 08:19:08,674 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-19 08:19:08,677 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 08:19:08 BasicIcfg [2022-11-19 08:19:08,677 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-19 08:19:08,677 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-19 08:19:08,677 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-19 08:19:08,678 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-19 08:19:08,678 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:12:49" (3/4) ... [2022-11-19 08:19:08,682 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-11-19 08:19:08,688 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2022-11-19 08:19:08,688 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2022-11-19 08:19:08,688 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread3 [2022-11-19 08:19:08,692 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 19 nodes and edges [2022-11-19 08:19:08,693 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2022-11-19 08:19:08,693 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-11-19 08:19:08,693 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-11-19 08:19:08,719 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c7250-b662-4bbc-8c71-b695ddb2d8df/bin/utaipan-I9t0OCRTmS/witness.graphml [2022-11-19 08:19:08,719 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-19 08:19:08,720 INFO L158 Benchmark]: Toolchain (without parser) took 379790.17ms. Allocated memory was 144.7MB in the beginning and 12.1GB in the end (delta: 11.9GB). Free memory was 117.1MB in the beginning and 8.3GB in the end (delta: -8.2GB). Peak memory consumption was 3.8GB. Max. memory is 16.1GB. [2022-11-19 08:19:08,720 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 96.5MB. Free memory is still 53.3MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-19 08:19:08,720 INFO L158 Benchmark]: CACSL2BoogieTranslator took 302.32ms. Allocated memory is still 144.7MB. Free memory was 117.1MB in the beginning and 119.3MB in the end (delta: -2.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-19 08:19:08,721 INFO L158 Benchmark]: Boogie Procedure Inliner took 34.90ms. Allocated memory is still 144.7MB. Free memory was 119.3MB in the beginning and 117.8MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-19 08:19:08,721 INFO L158 Benchmark]: Boogie Preprocessor took 27.36ms. Allocated memory is still 144.7MB. Free memory was 117.8MB in the beginning and 116.3MB in the end (delta: 1.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-19 08:19:08,721 INFO L158 Benchmark]: RCFGBuilder took 511.73ms. Allocated memory is still 144.7MB. Free memory was 116.3MB in the beginning and 101.6MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-11-19 08:19:08,721 INFO L158 Benchmark]: TraceAbstraction took 378864.62ms. Allocated memory was 144.7MB in the beginning and 12.1GB in the end (delta: 11.9GB). Free memory was 101.1MB in the beginning and 8.3GB in the end (delta: -8.2GB). Peak memory consumption was 3.7GB. Max. memory is 16.1GB. [2022-11-19 08:19:08,722 INFO L158 Benchmark]: Witness Printer took 42.13ms. Allocated memory is still 12.1GB. Free memory was 8.3GB in the beginning and 8.3GB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-19 08:19:08,723 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 96.5MB. Free memory is still 53.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 302.32ms. Allocated memory is still 144.7MB. Free memory was 117.1MB in the beginning and 119.3MB in the end (delta: -2.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 34.90ms. Allocated memory is still 144.7MB. Free memory was 119.3MB in the beginning and 117.8MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 27.36ms. Allocated memory is still 144.7MB. Free memory was 117.8MB in the beginning and 116.3MB in the end (delta: 1.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 511.73ms. Allocated memory is still 144.7MB. Free memory was 116.3MB in the beginning and 101.6MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 378864.62ms. Allocated memory was 144.7MB in the beginning and 12.1GB in the end (delta: 11.9GB). Free memory was 101.1MB in the beginning and 8.3GB in the end (delta: -8.2GB). Peak memory consumption was 3.7GB. Max. memory is 16.1GB. * Witness Printer took 42.13ms. Allocated memory is still 12.1GB. Free memory was 8.3GB in the beginning and 8.3GB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.6s, 108 PlacesBefore, 34 PlacesAfterwards, 105 TransitionsBefore, 26 TransitionsAfterwards, 1134 CoEnabledTransitionPairs, 7 FixpointIterations, 53 TrivialSequentialCompositions, 24 ConcurrentSequentialCompositions, 4 TrivialYvCompositions, 4 ConcurrentYvCompositions, 5 ChoiceCompositions, 90 TotalNumberOfCompositions, 1492 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1243, independent: 1212, independent conditional: 0, independent unconditional: 1212, dependent: 31, dependent conditional: 0, dependent unconditional: 31, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 691, independent: 685, independent conditional: 0, independent unconditional: 685, dependent: 6, dependent conditional: 0, dependent unconditional: 6, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 691, independent: 683, independent conditional: 0, independent unconditional: 683, dependent: 8, dependent conditional: 0, dependent unconditional: 8, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 8, independent: 2, independent conditional: 0, independent unconditional: 2, dependent: 6, dependent conditional: 0, dependent unconditional: 6, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 57, independent: 36, independent conditional: 0, independent unconditional: 36, dependent: 21, dependent conditional: 0, dependent unconditional: 21, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 1243, independent: 527, independent conditional: 0, independent unconditional: 527, dependent: 25, dependent conditional: 0, dependent unconditional: 25, unknown: 691, unknown conditional: 0, unknown unconditional: 691] , Statistics on independence cache: Total cache size (in pairs): 60, Positive cache size: 55, Positive conditional cache size: 0, Positive unconditional cache size: 55, Negative cache size: 5, Negative conditional cache size: 0, Negative unconditional cache size: 5, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 116]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 126 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 378.7s, OverallIterations: 24, TraceHistogramMax: 4, PathProgramHistogramMax: 16, EmptinessCheckTime: 2.5s, AutomataDifference: 305.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.6s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 18957 SdHoareTripleChecker+Valid, 55.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 18957 mSDsluCounter, 19 SdHoareTripleChecker+Invalid, 48.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 9 mSDsCounter, 3585 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 73892 IncrementalHoareTripleChecker+Invalid, 77477 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3585 mSolverCounterUnsat, 10 mSDtfsCounter, 73892 mSolverCounterSat, 0.5s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 5257 GetRequests, 578 SyntacticMatches, 27 SemanticMatches, 4652 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 735959 ImplicationChecksByTransitivity, 246.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=248888occurred in iteration=23, InterpolantAutomatonStates: 4272, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 24.6s AutomataMinimizationTime, 24 MinimizatonAttempts, 224668 StatesRemovedByMinimization, 20 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.6s SatisfiabilityAnalysisTime, 34.5s InterpolantComputationTime, 1104 NumberOfCodeBlocks, 1104 NumberOfCodeBlocksAsserted, 64 NumberOfCheckSat, 1538 ConstructedInterpolants, 0 QuantifiedInterpolants, 15337 SizeOfPredicates, 189 NumberOfNonLiveVariables, 3210 ConjunctsInSsa, 442 ConjunctsInUnsatCore, 60 InterpolantComputations, 6 PerfectInterpolantSequences, 106/715 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-11-19 08:19:08,741 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c7250-b662-4bbc-8c71-b695ddb2d8df/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE