./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a931b14-8d83-4d56-b06c-18fc50480162/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a931b14-8d83-4d56-b06c-18fc50480162/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a931b14-8d83-4d56-b06c-18fc50480162/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a931b14-8d83-4d56-b06c-18fc50480162/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a931b14-8d83-4d56-b06c-18fc50480162/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a931b14-8d83-4d56-b06c-18fc50480162/bin/uautomizer-tPACEb0tL8 --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9ceec73f9e554c485344f34d2b1865bfa0707ac614302bf3f054f6fb35398f61 --- 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-e04fb08 [2022-11-16 11:30:25,476 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 11:30:25,481 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 11:30:25,510 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 11:30:25,513 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 11:30:25,517 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 11:30:25,521 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 11:30:25,527 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 11:30:25,529 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 11:30:25,530 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 11:30:25,532 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 11:30:25,534 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 11:30:25,534 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 11:30:25,540 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 11:30:25,541 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 11:30:25,542 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 11:30:25,545 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 11:30:25,547 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 11:30:25,548 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 11:30:25,551 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 11:30:25,554 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 11:30:25,556 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 11:30:25,559 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 11:30:25,560 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 11:30:25,565 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 11:30:25,566 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 11:30:25,566 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 11:30:25,568 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 11:30:25,568 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 11:30:25,570 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 11:30:25,570 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 11:30:25,571 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 11:30:25,573 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 11:30:25,574 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 11:30:25,577 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 11:30:25,578 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 11:30:25,578 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 11:30:25,579 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 11:30:25,579 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 11:30:25,580 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 11:30:25,580 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 11:30:25,581 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a931b14-8d83-4d56-b06c-18fc50480162/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-16 11:30:25,626 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 11:30:25,627 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 11:30:25,628 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 11:30:25,628 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 11:30:25,629 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 11:30:25,629 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 11:30:25,630 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 11:30:25,630 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 11:30:25,630 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 11:30:25,630 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 11:30:25,631 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 11:30:25,632 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 11:30:25,632 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 11:30:25,632 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 11:30:25,632 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 11:30:25,632 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 11:30:25,633 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 11:30:25,633 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 11:30:25,633 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 11:30:25,633 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 11:30:25,633 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 11:30:25,634 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 11:30:25,634 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 11:30:25,634 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 11:30:25,634 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:30:25,635 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 11:30:25,636 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 11:30:25,636 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 11:30:25,637 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 11:30:25,637 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 11:30:25,637 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 11:30:25,637 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 11:30:25,638 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 11:30:25,638 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_8a931b14-8d83-4d56-b06c-18fc50480162/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a931b14-8d83-4d56-b06c-18fc50480162/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9ceec73f9e554c485344f34d2b1865bfa0707ac614302bf3f054f6fb35398f61 [2022-11-16 11:30:25,995 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 11:30:26,027 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 11:30:26,031 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 11:30:26,032 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 11:30:26,033 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 11:30:26,035 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a931b14-8d83-4d56-b06c-18fc50480162/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt.wvr.c [2022-11-16 11:30:26,098 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a931b14-8d83-4d56-b06c-18fc50480162/bin/uautomizer-tPACEb0tL8/data/d70bedd7d/9a11fc9fddc24ab89add0ea3f8e0d808/FLAGb545b223a [2022-11-16 11:30:26,621 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 11:30:26,622 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a931b14-8d83-4d56-b06c-18fc50480162/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt.wvr.c [2022-11-16 11:30:26,634 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a931b14-8d83-4d56-b06c-18fc50480162/bin/uautomizer-tPACEb0tL8/data/d70bedd7d/9a11fc9fddc24ab89add0ea3f8e0d808/FLAGb545b223a [2022-11-16 11:30:26,977 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a931b14-8d83-4d56-b06c-18fc50480162/bin/uautomizer-tPACEb0tL8/data/d70bedd7d/9a11fc9fddc24ab89add0ea3f8e0d808 [2022-11-16 11:30:26,979 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 11:30:26,981 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 11:30:26,982 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 11:30:26,982 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 11:30:26,987 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 11:30:26,988 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:30:26" (1/1) ... [2022-11-16 11:30:26,989 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@490998d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:30:26, skipping insertion in model container [2022-11-16 11:30:26,989 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:30:26" (1/1) ... [2022-11-16 11:30:27,000 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 11:30:27,034 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 11:30:27,331 WARN L229 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_8a931b14-8d83-4d56-b06c-18fc50480162/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt.wvr.c[4293,4306] [2022-11-16 11:30:27,359 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:30:27,370 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 11:30:27,417 WARN L229 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_8a931b14-8d83-4d56-b06c-18fc50480162/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt.wvr.c[4293,4306] [2022-11-16 11:30:27,422 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:30:27,437 INFO L208 MainTranslator]: Completed translation [2022-11-16 11:30:27,439 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:30:27 WrapperNode [2022-11-16 11:30:27,439 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 11:30:27,440 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 11:30:27,440 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 11:30:27,440 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 11:30:27,448 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:30:27" (1/1) ... [2022-11-16 11:30:27,471 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:30:27" (1/1) ... [2022-11-16 11:30:27,515 INFO L138 Inliner]: procedures = 26, calls = 79, calls flagged for inlining = 17, calls inlined = 21, statements flattened = 319 [2022-11-16 11:30:27,515 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 11:30:27,516 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 11:30:27,516 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 11:30:27,516 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 11:30:27,526 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:30:27" (1/1) ... [2022-11-16 11:30:27,527 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:30:27" (1/1) ... [2022-11-16 11:30:27,539 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:30:27" (1/1) ... [2022-11-16 11:30:27,540 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:30:27" (1/1) ... [2022-11-16 11:30:27,562 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:30:27" (1/1) ... [2022-11-16 11:30:27,567 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:30:27" (1/1) ... [2022-11-16 11:30:27,569 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:30:27" (1/1) ... [2022-11-16 11:30:27,570 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:30:27" (1/1) ... [2022-11-16 11:30:27,573 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 11:30:27,574 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 11:30:27,586 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 11:30:27,587 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 11:30:27,590 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:30:27" (1/1) ... [2022-11-16 11:30:27,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:30:27,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a931b14-8d83-4d56-b06c-18fc50480162/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:30:27,628 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a931b14-8d83-4d56-b06c-18fc50480162/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 11:30:27,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a931b14-8d83-4d56-b06c-18fc50480162/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 11:30:27,683 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 11:30:27,683 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 11:30:27,683 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 11:30:27,683 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 11:30:27,683 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-16 11:30:27,683 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-16 11:30:27,684 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-16 11:30:27,684 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-16 11:30:27,685 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-16 11:30:27,685 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-16 11:30:27,685 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-11-16 11:30:27,685 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-11-16 11:30:27,685 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 11:30:27,685 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-16 11:30:27,686 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-16 11:30:27,686 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 11:30:27,686 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 11:30:27,686 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 11:30:27,686 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 11:30:27,688 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-16 11:30:27,847 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 11:30:27,850 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 11:30:28,460 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 11:30:28,773 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 11:30:28,774 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-16 11:30:28,776 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:30:28 BoogieIcfgContainer [2022-11-16 11:30:28,776 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 11:30:28,787 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 11:30:28,787 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 11:30:28,791 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 11:30:28,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 11:30:26" (1/3) ... [2022-11-16 11:30:28,792 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6543098e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:30:28, skipping insertion in model container [2022-11-16 11:30:28,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:30:27" (2/3) ... [2022-11-16 11:30:28,793 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6543098e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:30:28, skipping insertion in model container [2022-11-16 11:30:28,793 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:30:28" (3/3) ... [2022-11-16 11:30:28,794 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-buffer-mult-alt.wvr.c [2022-11-16 11:30:28,804 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-16 11:30:28,815 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 11:30:28,815 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 11:30:28,815 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-16 11:30:28,899 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-16 11:30:28,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 241 places, 247 transitions, 526 flow [2022-11-16 11:30:29,056 INFO L130 PetriNetUnfolder]: 19/243 cut-off events. [2022-11-16 11:30:29,056 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-16 11:30:29,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 260 conditions, 243 events. 19/243 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 115 event pairs, 0 based on Foata normal form. 0/223 useless extension candidates. Maximal degree in co-relation 204. Up to 2 conditions per place. [2022-11-16 11:30:29,065 INFO L82 GeneralOperation]: Start removeDead. Operand has 241 places, 247 transitions, 526 flow [2022-11-16 11:30:29,075 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 224 places, 230 transitions, 484 flow [2022-11-16 11:30:29,086 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:30:29,092 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=PETRI_NET, 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;@a164649, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:30:29,093 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-11-16 11:30:29,179 INFO L130 PetriNetUnfolder]: 19/229 cut-off events. [2022-11-16 11:30:29,180 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-16 11:30:29,180 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:30:29,181 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:30:29,183 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 2 more)] === [2022-11-16 11:30:29,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:30:29,191 INFO L85 PathProgramCache]: Analyzing trace with hash 990710774, now seen corresponding path program 1 times [2022-11-16 11:30:29,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:30:29,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171075879] [2022-11-16 11:30:29,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:30:29,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:30:29,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:30:29,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:30:29,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:30:29,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171075879] [2022-11-16 11:30:29,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171075879] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:30:29,623 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:30:29,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:30:29,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908849877] [2022-11-16 11:30:29,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:30:29,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 11:30:29,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:30:29,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 11:30:29,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 11:30:29,666 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 247 [2022-11-16 11:30:29,669 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 230 transitions, 484 flow. Second operand has 2 states, 2 states have (on average 226.0) internal successors, (452), 2 states have internal predecessors, (452), 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) [2022-11-16 11:30:29,670 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:30:29,670 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 247 [2022-11-16 11:30:29,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:30:30,109 INFO L130 PetriNetUnfolder]: 226/768 cut-off events. [2022-11-16 11:30:30,109 INFO L131 PetriNetUnfolder]: For 146/147 co-relation queries the response was YES. [2022-11-16 11:30:30,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1179 conditions, 768 events. 226/768 cut-off events. For 146/147 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 3392 event pairs, 121 based on Foata normal form. 198/879 useless extension candidates. Maximal degree in co-relation 906. Up to 306 conditions per place. [2022-11-16 11:30:30,126 INFO L137 encePairwiseOnDemand]: 234/247 looper letters, 14 selfloop transitions, 0 changer transitions 7/217 dead transitions. [2022-11-16 11:30:30,126 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 217 transitions, 486 flow [2022-11-16 11:30:30,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 11:30:30,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-16 11:30:30,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 465 transitions. [2022-11-16 11:30:30,152 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9412955465587044 [2022-11-16 11:30:30,153 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 465 transitions. [2022-11-16 11:30:30,154 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 465 transitions. [2022-11-16 11:30:30,158 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:30:30,161 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 465 transitions. [2022-11-16 11:30:30,168 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 232.5) internal successors, (465), 2 states have internal predecessors, (465), 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) [2022-11-16 11:30:30,177 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 247.0) internal successors, (741), 3 states have internal predecessors, (741), 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) [2022-11-16 11:30:30,178 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 247.0) internal successors, (741), 3 states have internal predecessors, (741), 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) [2022-11-16 11:30:30,181 INFO L175 Difference]: Start difference. First operand has 224 places, 230 transitions, 484 flow. Second operand 2 states and 465 transitions. [2022-11-16 11:30:30,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 217 transitions, 486 flow [2022-11-16 11:30:30,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 217 transitions, 470 flow, removed 0 selfloop flow, removed 8 redundant places. [2022-11-16 11:30:30,196 INFO L231 Difference]: Finished difference. Result has 217 places, 210 transitions, 428 flow [2022-11-16 11:30:30,199 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=442, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=428, PETRI_PLACES=217, PETRI_TRANSITIONS=210} [2022-11-16 11:30:30,205 INFO L288 CegarLoopForPetriNet]: 224 programPoint places, -7 predicate places. [2022-11-16 11:30:30,205 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 210 transitions, 428 flow [2022-11-16 11:30:30,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 226.0) internal successors, (452), 2 states have internal predecessors, (452), 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) [2022-11-16 11:30:30,206 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:30:30,207 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:30:30,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 11:30:30,207 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 2 more)] === [2022-11-16 11:30:30,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:30:30,210 INFO L85 PathProgramCache]: Analyzing trace with hash 527115004, now seen corresponding path program 1 times [2022-11-16 11:30:30,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:30:30,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812032381] [2022-11-16 11:30:30,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:30:30,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:30:30,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:30:31,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:30:31,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:30:31,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812032381] [2022-11-16 11:30:31,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812032381] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:30:31,591 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:30:31,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-16 11:30:31,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57272432] [2022-11-16 11:30:31,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:30:31,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 11:30:31,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:30:31,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 11:30:31,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:30:31,597 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 247 [2022-11-16 11:30:31,601 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 210 transitions, 428 flow. Second operand has 8 states, 8 states have (on average 180.25) internal successors, (1442), 8 states have internal predecessors, (1442), 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) [2022-11-16 11:30:31,601 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:30:31,602 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 247 [2022-11-16 11:30:31,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:30:32,372 INFO L130 PetriNetUnfolder]: 768/1413 cut-off events. [2022-11-16 11:30:32,373 INFO L131 PetriNetUnfolder]: For 33/33 co-relation queries the response was YES. [2022-11-16 11:30:32,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2635 conditions, 1413 events. 768/1413 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 6518 event pairs, 30 based on Foata normal form. 0/1324 useless extension candidates. Maximal degree in co-relation 2632. Up to 669 conditions per place. [2022-11-16 11:30:32,393 INFO L137 encePairwiseOnDemand]: 240/247 looper letters, 66 selfloop transitions, 6 changer transitions 0/231 dead transitions. [2022-11-16 11:30:32,394 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 231 transitions, 620 flow [2022-11-16 11:30:32,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:30:32,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-16 11:30:32,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1298 transitions. [2022-11-16 11:30:32,400 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7507229612492771 [2022-11-16 11:30:32,400 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1298 transitions. [2022-11-16 11:30:32,400 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1298 transitions. [2022-11-16 11:30:32,402 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:30:32,402 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1298 transitions. [2022-11-16 11:30:32,407 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 185.42857142857142) internal successors, (1298), 7 states have internal predecessors, (1298), 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) [2022-11-16 11:30:32,415 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 247.0) internal successors, (1976), 8 states have internal predecessors, (1976), 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) [2022-11-16 11:30:32,417 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 247.0) internal successors, (1976), 8 states have internal predecessors, (1976), 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) [2022-11-16 11:30:32,417 INFO L175 Difference]: Start difference. First operand has 217 places, 210 transitions, 428 flow. Second operand 7 states and 1298 transitions. [2022-11-16 11:30:32,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 231 transitions, 620 flow [2022-11-16 11:30:32,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 231 transitions, 620 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 11:30:32,434 INFO L231 Difference]: Finished difference. Result has 217 places, 211 transitions, 448 flow [2022-11-16 11:30:32,434 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=428, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=448, PETRI_PLACES=217, PETRI_TRANSITIONS=211} [2022-11-16 11:30:32,435 INFO L288 CegarLoopForPetriNet]: 224 programPoint places, -7 predicate places. [2022-11-16 11:30:32,436 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 211 transitions, 448 flow [2022-11-16 11:30:32,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 180.25) internal successors, (1442), 8 states have internal predecessors, (1442), 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) [2022-11-16 11:30:32,438 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:30:32,438 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:30:32,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 11:30:32,439 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 2 more)] === [2022-11-16 11:30:32,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:30:32,442 INFO L85 PathProgramCache]: Analyzing trace with hash -488677073, now seen corresponding path program 1 times [2022-11-16 11:30:32,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:30:32,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579683982] [2022-11-16 11:30:32,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:30:32,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:30:32,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:30:33,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:30:33,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:30:33,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579683982] [2022-11-16 11:30:33,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579683982] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:30:33,346 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:30:33,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 11:30:33,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544438213] [2022-11-16 11:30:33,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:30:33,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:30:33,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:30:33,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:30:33,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:30:33,353 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 247 [2022-11-16 11:30:33,355 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 211 transitions, 448 flow. Second operand has 5 states, 5 states have (on average 211.0) internal successors, (1055), 5 states have internal predecessors, (1055), 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) [2022-11-16 11:30:33,355 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:30:33,355 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 247 [2022-11-16 11:30:33,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:30:34,146 INFO L130 PetriNetUnfolder]: 1288/2417 cut-off events. [2022-11-16 11:30:34,146 INFO L131 PetriNetUnfolder]: For 342/342 co-relation queries the response was YES. [2022-11-16 11:30:34,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4671 conditions, 2417 events. 1288/2417 cut-off events. For 342/342 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 14014 event pairs, 158 based on Foata normal form. 18/2250 useless extension candidates. Maximal degree in co-relation 4666. Up to 1064 conditions per place. [2022-11-16 11:30:34,172 INFO L137 encePairwiseOnDemand]: 242/247 looper letters, 58 selfloop transitions, 4 changer transitions 0/246 dead transitions. [2022-11-16 11:30:34,173 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 246 transitions, 675 flow [2022-11-16 11:30:34,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:30:34,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-16 11:30:34,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1095 transitions. [2022-11-16 11:30:34,178 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8866396761133604 [2022-11-16 11:30:34,178 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1095 transitions. [2022-11-16 11:30:34,178 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1095 transitions. [2022-11-16 11:30:34,179 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:30:34,179 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1095 transitions. [2022-11-16 11:30:34,182 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 219.0) internal successors, (1095), 5 states have internal predecessors, (1095), 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) [2022-11-16 11:30:34,184 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 247.0) internal successors, (1482), 6 states have internal predecessors, (1482), 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) [2022-11-16 11:30:34,185 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 247.0) internal successors, (1482), 6 states have internal predecessors, (1482), 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) [2022-11-16 11:30:34,185 INFO L175 Difference]: Start difference. First operand has 217 places, 211 transitions, 448 flow. Second operand 5 states and 1095 transitions. [2022-11-16 11:30:34,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 246 transitions, 675 flow [2022-11-16 11:30:34,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 246 transitions, 661 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-16 11:30:34,192 INFO L231 Difference]: Finished difference. Result has 218 places, 213 transitions, 463 flow [2022-11-16 11:30:34,193 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=438, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=463, PETRI_PLACES=218, PETRI_TRANSITIONS=213} [2022-11-16 11:30:34,196 INFO L288 CegarLoopForPetriNet]: 224 programPoint places, -6 predicate places. [2022-11-16 11:30:34,196 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 213 transitions, 463 flow [2022-11-16 11:30:34,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 211.0) internal successors, (1055), 5 states have internal predecessors, (1055), 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) [2022-11-16 11:30:34,197 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:30:34,197 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:30:34,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 11:30:34,198 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 2 more)] === [2022-11-16 11:30:34,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:30:34,199 INFO L85 PathProgramCache]: Analyzing trace with hash 2019201241, now seen corresponding path program 2 times [2022-11-16 11:30:34,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:30:34,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148504088] [2022-11-16 11:30:34,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:30:34,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:30:34,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:30:34,984 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:30:34,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:30:34,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148504088] [2022-11-16 11:30:34,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148504088] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:30:34,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697136455] [2022-11-16 11:30:34,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:30:34,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:30:34,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a931b14-8d83-4d56-b06c-18fc50480162/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:30:34,994 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a931b14-8d83-4d56-b06c-18fc50480162/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:30:35,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a931b14-8d83-4d56-b06c-18fc50480162/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 11:30:35,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:30:35,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:30:35,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 11:30:35,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:30:35,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:30:35,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:30:36,014 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:30:36,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697136455] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 11:30:36,015 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:30:36,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 16 [2022-11-16 11:30:36,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452947901] [2022-11-16 11:30:36,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:30:36,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:30:36,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:30:36,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:30:36,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-11-16 11:30:36,020 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 247 [2022-11-16 11:30:36,023 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 213 transitions, 463 flow. Second operand has 7 states, 7 states have (on average 182.28571428571428) internal successors, (1276), 7 states have internal predecessors, (1276), 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) [2022-11-16 11:30:36,023 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:30:36,023 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 247 [2022-11-16 11:30:36,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:30:36,930 INFO L130 PetriNetUnfolder]: 1223/2751 cut-off events. [2022-11-16 11:30:36,931 INFO L131 PetriNetUnfolder]: For 609/609 co-relation queries the response was YES. [2022-11-16 11:30:36,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5085 conditions, 2751 events. 1223/2751 cut-off events. For 609/609 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 18100 event pairs, 221 based on Foata normal form. 35/2593 useless extension candidates. Maximal degree in co-relation 5078. Up to 455 conditions per place. [2022-11-16 11:30:36,955 INFO L137 encePairwiseOnDemand]: 238/247 looper letters, 82 selfloop transitions, 10 changer transitions 0/254 dead transitions. [2022-11-16 11:30:36,956 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 254 transitions, 759 flow [2022-11-16 11:30:36,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 11:30:36,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-16 11:30:36,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1497 transitions. [2022-11-16 11:30:36,960 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7575910931174089 [2022-11-16 11:30:36,960 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1497 transitions. [2022-11-16 11:30:36,961 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1497 transitions. [2022-11-16 11:30:36,962 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:30:36,962 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1497 transitions. [2022-11-16 11:30:36,965 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 187.125) internal successors, (1497), 8 states have internal predecessors, (1497), 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) [2022-11-16 11:30:36,969 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 247.0) internal successors, (2223), 9 states have internal predecessors, (2223), 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) [2022-11-16 11:30:36,971 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 247.0) internal successors, (2223), 9 states have internal predecessors, (2223), 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) [2022-11-16 11:30:36,971 INFO L175 Difference]: Start difference. First operand has 218 places, 213 transitions, 463 flow. Second operand 8 states and 1497 transitions. [2022-11-16 11:30:36,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 254 transitions, 759 flow [2022-11-16 11:30:36,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 254 transitions, 753 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-16 11:30:36,978 INFO L231 Difference]: Finished difference. Result has 227 places, 220 transitions, 523 flow [2022-11-16 11:30:36,979 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=460, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=523, PETRI_PLACES=227, PETRI_TRANSITIONS=220} [2022-11-16 11:30:36,980 INFO L288 CegarLoopForPetriNet]: 224 programPoint places, 3 predicate places. [2022-11-16 11:30:36,980 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 220 transitions, 523 flow [2022-11-16 11:30:36,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 182.28571428571428) internal successors, (1276), 7 states have internal predecessors, (1276), 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) [2022-11-16 11:30:36,981 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:30:36,981 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:30:37,000 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a931b14-8d83-4d56-b06c-18fc50480162/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 11:30:37,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a931b14-8d83-4d56-b06c-18fc50480162/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:30:37,193 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 2 more)] === [2022-11-16 11:30:37,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:30:37,194 INFO L85 PathProgramCache]: Analyzing trace with hash -2057871337, now seen corresponding path program 3 times [2022-11-16 11:30:37,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:30:37,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802997349] [2022-11-16 11:30:37,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:30:37,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:30:37,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:30:37,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:30:37,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:30:37,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802997349] [2022-11-16 11:30:37,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802997349] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:30:37,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892343507] [2022-11-16 11:30:37,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:30:37,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:30:37,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a931b14-8d83-4d56-b06c-18fc50480162/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:30:37,839 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a931b14-8d83-4d56-b06c-18fc50480162/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:30:37,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a931b14-8d83-4d56-b06c-18fc50480162/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 11:30:38,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-16 11:30:38,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:30:38,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 11:30:38,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:30:38,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:30:38,536 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:30:38,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892343507] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:30:38,536 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:30:38,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 10 [2022-11-16 11:30:38,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916886290] [2022-11-16 11:30:38,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:30:38,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:30:38,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:30:38,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:30:38,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:30:38,540 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 247 [2022-11-16 11:30:38,542 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 220 transitions, 523 flow. Second operand has 7 states, 7 states have (on average 178.0) internal successors, (1246), 7 states have internal predecessors, (1246), 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) [2022-11-16 11:30:38,542 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:30:38,543 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 247 [2022-11-16 11:30:38,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:30:39,733 INFO L130 PetriNetUnfolder]: 1740/3565 cut-off events. [2022-11-16 11:30:39,734 INFO L131 PetriNetUnfolder]: For 2014/2014 co-relation queries the response was YES. [2022-11-16 11:30:39,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8331 conditions, 3565 events. 1740/3565 cut-off events. For 2014/2014 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 24097 event pairs, 58 based on Foata normal form. 80/3586 useless extension candidates. Maximal degree in co-relation 8320. Up to 1544 conditions per place. [2022-11-16 11:30:39,780 INFO L137 encePairwiseOnDemand]: 237/247 looper letters, 101 selfloop transitions, 13 changer transitions 0/269 dead transitions. [2022-11-16 11:30:39,780 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 269 transitions, 938 flow [2022-11-16 11:30:39,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 11:30:39,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-16 11:30:39,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1645 transitions. [2022-11-16 11:30:39,785 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7399910031488979 [2022-11-16 11:30:39,786 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1645 transitions. [2022-11-16 11:30:39,786 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1645 transitions. [2022-11-16 11:30:39,787 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:30:39,788 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1645 transitions. [2022-11-16 11:30:39,792 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 182.77777777777777) internal successors, (1645), 9 states have internal predecessors, (1645), 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) [2022-11-16 11:30:39,796 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 247.0) internal successors, (2470), 10 states have internal predecessors, (2470), 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) [2022-11-16 11:30:39,798 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 247.0) internal successors, (2470), 10 states have internal predecessors, (2470), 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) [2022-11-16 11:30:39,798 INFO L175 Difference]: Start difference. First operand has 227 places, 220 transitions, 523 flow. Second operand 9 states and 1645 transitions. [2022-11-16 11:30:39,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 269 transitions, 938 flow [2022-11-16 11:30:39,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 269 transitions, 929 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-11-16 11:30:39,810 INFO L231 Difference]: Finished difference. Result has 235 places, 226 transitions, 600 flow [2022-11-16 11:30:39,811 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=508, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=600, PETRI_PLACES=235, PETRI_TRANSITIONS=226} [2022-11-16 11:30:39,812 INFO L288 CegarLoopForPetriNet]: 224 programPoint places, 11 predicate places. [2022-11-16 11:30:39,812 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 226 transitions, 600 flow [2022-11-16 11:30:39,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 178.0) internal successors, (1246), 7 states have internal predecessors, (1246), 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) [2022-11-16 11:30:39,813 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:30:39,814 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:30:39,826 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a931b14-8d83-4d56-b06c-18fc50480162/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-16 11:30:40,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a931b14-8d83-4d56-b06c-18fc50480162/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:30:40,020 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 2 more)] === [2022-11-16 11:30:40,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:30:40,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1178251620, now seen corresponding path program 1 times [2022-11-16 11:30:40,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:30:40,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372325703] [2022-11-16 11:30:40,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:30:40,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:30:40,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:30:40,321 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:30:40,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:30:40,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372325703] [2022-11-16 11:30:40,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372325703] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:30:40,323 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:30:40,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 11:30:40,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710889452] [2022-11-16 11:30:40,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:30:40,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:30:40,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:30:40,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:30:40,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:30:40,332 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 247 [2022-11-16 11:30:40,334 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 226 transitions, 600 flow. Second operand has 6 states, 6 states have (on average 197.83333333333334) internal successors, (1187), 6 states have internal predecessors, (1187), 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) [2022-11-16 11:30:40,334 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:30:40,334 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 247 [2022-11-16 11:30:40,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:30:41,158 INFO L130 PetriNetUnfolder]: 837/2383 cut-off events. [2022-11-16 11:30:41,158 INFO L131 PetriNetUnfolder]: For 2440/2722 co-relation queries the response was YES. [2022-11-16 11:30:41,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5366 conditions, 2383 events. 837/2383 cut-off events. For 2440/2722 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 16219 event pairs, 443 based on Foata normal form. 126/2345 useless extension candidates. Maximal degree in co-relation 5352. Up to 1126 conditions per place. [2022-11-16 11:30:41,196 INFO L137 encePairwiseOnDemand]: 237/247 looper letters, 44 selfloop transitions, 8 changer transitions 20/250 dead transitions. [2022-11-16 11:30:41,196 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 250 transitions, 796 flow [2022-11-16 11:30:41,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 11:30:41,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-16 11:30:41,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1802 transitions. [2022-11-16 11:30:41,202 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8106162843004948 [2022-11-16 11:30:41,202 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1802 transitions. [2022-11-16 11:30:41,203 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1802 transitions. [2022-11-16 11:30:41,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:30:41,204 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1802 transitions. [2022-11-16 11:30:41,210 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 200.22222222222223) internal successors, (1802), 9 states have internal predecessors, (1802), 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) [2022-11-16 11:30:41,215 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 247.0) internal successors, (2470), 10 states have internal predecessors, (2470), 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) [2022-11-16 11:30:41,216 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 247.0) internal successors, (2470), 10 states have internal predecessors, (2470), 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) [2022-11-16 11:30:41,218 INFO L175 Difference]: Start difference. First operand has 235 places, 226 transitions, 600 flow. Second operand 9 states and 1802 transitions. [2022-11-16 11:30:41,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 250 transitions, 796 flow [2022-11-16 11:30:41,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 250 transitions, 790 flow, removed 1 selfloop flow, removed 2 redundant places. [2022-11-16 11:30:41,232 INFO L231 Difference]: Finished difference. Result has 243 places, 227 transitions, 626 flow [2022-11-16 11:30:41,233 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=594, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=626, PETRI_PLACES=243, PETRI_TRANSITIONS=227} [2022-11-16 11:30:41,236 INFO L288 CegarLoopForPetriNet]: 224 programPoint places, 19 predicate places. [2022-11-16 11:30:41,236 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 227 transitions, 626 flow [2022-11-16 11:30:41,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 197.83333333333334) internal successors, (1187), 6 states have internal predecessors, (1187), 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) [2022-11-16 11:30:41,237 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:30:41,238 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:30:41,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-16 11:30:41,238 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 2 more)] === [2022-11-16 11:30:41,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:30:41,239 INFO L85 PathProgramCache]: Analyzing trace with hash -535443137, now seen corresponding path program 1 times [2022-11-16 11:30:41,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:30:41,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269151095] [2022-11-16 11:30:41,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:30:41,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:30:41,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:30:45,156 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:30:45,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:30:45,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269151095] [2022-11-16 11:30:45,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269151095] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:30:45,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745165294] [2022-11-16 11:30:45,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:30:45,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:30:45,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a931b14-8d83-4d56-b06c-18fc50480162/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:30:45,164 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a931b14-8d83-4d56-b06c-18fc50480162/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:30:45,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a931b14-8d83-4d56-b06c-18fc50480162/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 11:30:45,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:30:45,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-16 11:30:45,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:30:47,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-16 11:30:47,188 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:30:47,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:30:47,406 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:30:47,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 22 [2022-11-16 11:30:49,042 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:30:49,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745165294] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:30:49,042 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:30:49,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 21, 16] total 51 [2022-11-16 11:30:49,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812157460] [2022-11-16 11:30:49,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:30:49,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-16 11:30:49,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:30:49,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-16 11:30:49,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=312, Invalid=2238, Unknown=0, NotChecked=0, Total=2550 [2022-11-16 11:30:49,053 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 247 [2022-11-16 11:30:49,061 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 227 transitions, 626 flow. Second operand has 51 states, 51 states have (on average 115.98039215686275) internal successors, (5915), 51 states have internal predecessors, (5915), 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) [2022-11-16 11:30:49,061 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:30:49,062 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 247 [2022-11-16 11:30:49,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:31:17,954 INFO L130 PetriNetUnfolder]: 50689/85856 cut-off events. [2022-11-16 11:31:17,954 INFO L131 PetriNetUnfolder]: For 79416/79416 co-relation queries the response was YES. [2022-11-16 11:31:18,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 215413 conditions, 85856 events. 50689/85856 cut-off events. For 79416/79416 co-relation queries the response was YES. Maximal size of possible extension queue 4019. Compared 810386 event pairs, 3251 based on Foata normal form. 270/82886 useless extension candidates. Maximal degree in co-relation 215396. Up to 14146 conditions per place. [2022-11-16 11:31:19,060 INFO L137 encePairwiseOnDemand]: 208/247 looper letters, 801 selfloop transitions, 175 changer transitions 36/1107 dead transitions. [2022-11-16 11:31:19,060 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 1107 transitions, 5890 flow [2022-11-16 11:31:19,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-11-16 11:31:19,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2022-11-16 11:31:19,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 10122 transitions. [2022-11-16 11:31:19,094 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49373201307253306 [2022-11-16 11:31:19,094 INFO L72 ComplementDD]: Start complementDD. Operand 83 states and 10122 transitions. [2022-11-16 11:31:19,094 INFO L73 IsDeterministic]: Start isDeterministic. Operand 83 states and 10122 transitions. [2022-11-16 11:31:19,102 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:31:19,102 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 83 states and 10122 transitions. [2022-11-16 11:31:19,131 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 84 states, 83 states have (on average 121.95180722891567) internal successors, (10122), 83 states have internal predecessors, (10122), 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) [2022-11-16 11:31:19,181 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 84 states, 84 states have (on average 247.0) internal successors, (20748), 84 states have internal predecessors, (20748), 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) [2022-11-16 11:31:19,200 INFO L81 ComplementDD]: Finished complementDD. Result has 84 states, 84 states have (on average 247.0) internal successors, (20748), 84 states have internal predecessors, (20748), 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) [2022-11-16 11:31:19,201 INFO L175 Difference]: Start difference. First operand has 243 places, 227 transitions, 626 flow. Second operand 83 states and 10122 transitions. [2022-11-16 11:31:19,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 1107 transitions, 5890 flow [2022-11-16 11:31:19,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 1107 transitions, 5785 flow, removed 18 selfloop flow, removed 7 redundant places. [2022-11-16 11:31:19,576 INFO L231 Difference]: Finished difference. Result has 366 places, 401 transitions, 2155 flow [2022-11-16 11:31:19,577 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=599, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=83, PETRI_FLOW=2155, PETRI_PLACES=366, PETRI_TRANSITIONS=401} [2022-11-16 11:31:19,578 INFO L288 CegarLoopForPetriNet]: 224 programPoint places, 142 predicate places. [2022-11-16 11:31:19,578 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 401 transitions, 2155 flow [2022-11-16 11:31:19,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 115.98039215686275) internal successors, (5915), 51 states have internal predecessors, (5915), 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) [2022-11-16 11:31:19,581 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:31:19,581 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:31:19,594 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a931b14-8d83-4d56-b06c-18fc50480162/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 11:31:19,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a931b14-8d83-4d56-b06c-18fc50480162/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:31:19,789 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 2 more)] === [2022-11-16 11:31:19,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:31:19,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1467317397, now seen corresponding path program 2 times [2022-11-16 11:31:19,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:31:19,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496553376] [2022-11-16 11:31:19,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:31:19,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:31:19,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:31:25,668 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:31:25,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:31:25,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496553376] [2022-11-16 11:31:25,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496553376] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:31:25,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539873792] [2022-11-16 11:31:25,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:31:25,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:31:25,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a931b14-8d83-4d56-b06c-18fc50480162/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:31:25,671 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a931b14-8d83-4d56-b06c-18fc50480162/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:31:25,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a931b14-8d83-4d56-b06c-18fc50480162/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 11:31:25,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:31:25,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:31:25,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-16 11:31:25,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:31:27,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 11:31:30,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 11:31:30,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:31:30,884 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-16 11:31:31,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:31:31,229 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-16 11:31:31,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:31:31,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-16 11:31:32,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-11-16 11:31:32,216 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:31:32,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:31:49,921 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:31:49,922 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 52 [2022-11-16 11:31:49,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 2723 treesize of output 2651 [2022-11-16 11:31:49,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1329 treesize of output 1275 [2022-11-16 11:31:50,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 2582 treesize of output 2198 [2022-11-16 11:31:50,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 2198 treesize of output 2006 [2022-11-16 11:31:50,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 2006 treesize of output 1910 [2022-11-16 11:32:13,939 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:32:13,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539873792] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:32:13,939 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:32:13,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 33, 32] total 82 [2022-11-16 11:32:13,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780124599] [2022-11-16 11:32:13,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:32:13,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-11-16 11:32:13,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:32:13,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-11-16 11:32:13,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=527, Invalid=6072, Unknown=43, NotChecked=0, Total=6642 [2022-11-16 11:32:13,957 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 247 [2022-11-16 11:32:13,968 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 401 transitions, 2155 flow. Second operand has 82 states, 82 states have (on average 100.48780487804878) internal successors, (8240), 82 states have internal predecessors, (8240), 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) [2022-11-16 11:32:13,969 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:32:13,969 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 247 [2022-11-16 11:32:13,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand