./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-complex/safestack_relacy.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad963cfa-b14e-4937-8333-0c076a146db0/bin/uautomizer-J5u9QxTXDZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad963cfa-b14e-4937-8333-0c076a146db0/bin/uautomizer-J5u9QxTXDZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad963cfa-b14e-4937-8333-0c076a146db0/bin/uautomizer-J5u9QxTXDZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad963cfa-b14e-4937-8333-0c076a146db0/bin/uautomizer-J5u9QxTXDZ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-complex/safestack_relacy.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad963cfa-b14e-4937-8333-0c076a146db0/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad963cfa-b14e-4937-8333-0c076a146db0/bin/uautomizer-J5u9QxTXDZ --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 1d61eb304445c3cb39dfadfa4748d680ea5f0f4958f8bc176e8bc3c77c47e674 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-dbf71c6-m [2022-10-17 10:54:50,369 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 10:54:50,371 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 10:54:50,398 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 10:54:50,399 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 10:54:50,400 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 10:54:50,402 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 10:54:50,404 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 10:54:50,406 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 10:54:50,407 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 10:54:50,409 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 10:54:50,410 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 10:54:50,411 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 10:54:50,412 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 10:54:50,413 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 10:54:50,415 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 10:54:50,416 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 10:54:50,417 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 10:54:50,419 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 10:54:50,421 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 10:54:50,423 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 10:54:50,424 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 10:54:50,425 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 10:54:50,426 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 10:54:50,431 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 10:54:50,432 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 10:54:50,432 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 10:54:50,433 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 10:54:50,434 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 10:54:50,435 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 10:54:50,436 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 10:54:50,437 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 10:54:50,437 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 10:54:50,438 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 10:54:50,440 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 10:54:50,440 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 10:54:50,441 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 10:54:50,441 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 10:54:50,442 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 10:54:50,443 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 10:54:50,444 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 10:54:50,445 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad963cfa-b14e-4937-8333-0c076a146db0/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-10-17 10:54:50,468 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 10:54:50,469 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 10:54:50,469 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 10:54:50,469 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 10:54:50,470 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 10:54:50,470 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 10:54:50,471 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-17 10:54:50,472 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-17 10:54:50,472 INFO L138 SettingsManager]: * Use SBE=true [2022-10-17 10:54:50,472 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 10:54:50,473 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 10:54:50,473 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 10:54:50,473 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 10:54:50,474 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 10:54:50,474 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 10:54:50,474 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 10:54:50,475 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 10:54:50,475 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 10:54:50,475 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 10:54:50,476 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 10:54:50,476 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 10:54:50,476 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 10:54:50,476 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-17 10:54:50,477 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 10:54:50,477 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:54:50,477 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 10:54:50,478 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 10:54:50,478 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 10:54:50,478 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-17 10:54:50,479 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 10:54:50,487 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-10-17 10:54:50,487 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-10-17 10:54:50,487 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 10:54:50,488 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_ad963cfa-b14e-4937-8333-0c076a146db0/bin/uautomizer-J5u9QxTXDZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad963cfa-b14e-4937-8333-0c076a146db0/bin/uautomizer-J5u9QxTXDZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1d61eb304445c3cb39dfadfa4748d680ea5f0f4958f8bc176e8bc3c77c47e674 [2022-10-17 10:54:50,755 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 10:54:50,781 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 10:54:50,783 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 10:54:50,784 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 10:54:50,785 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 10:54:50,787 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad963cfa-b14e-4937-8333-0c076a146db0/bin/uautomizer-J5u9QxTXDZ/../../sv-benchmarks/c/pthread-complex/safestack_relacy.i [2022-10-17 10:54:50,885 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad963cfa-b14e-4937-8333-0c076a146db0/bin/uautomizer-J5u9QxTXDZ/data/541d20be7/96e56b1d38b94c7eb5443493dc25aada/FLAG858d4ceb0 [2022-10-17 10:54:51,484 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 10:54:51,485 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad963cfa-b14e-4937-8333-0c076a146db0/sv-benchmarks/c/pthread-complex/safestack_relacy.i [2022-10-17 10:54:51,514 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad963cfa-b14e-4937-8333-0c076a146db0/bin/uautomizer-J5u9QxTXDZ/data/541d20be7/96e56b1d38b94c7eb5443493dc25aada/FLAG858d4ceb0 [2022-10-17 10:54:51,734 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad963cfa-b14e-4937-8333-0c076a146db0/bin/uautomizer-J5u9QxTXDZ/data/541d20be7/96e56b1d38b94c7eb5443493dc25aada [2022-10-17 10:54:51,739 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 10:54:51,741 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 10:54:51,756 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 10:54:51,757 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 10:54:51,766 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 10:54:51,766 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:54:51" (1/1) ... [2022-10-17 10:54:51,767 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@686ccdea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:54:51, skipping insertion in model container [2022-10-17 10:54:51,767 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:54:51" (1/1) ... [2022-10-17 10:54:51,773 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 10:54:51,837 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 10:54:52,545 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad963cfa-b14e-4937-8333-0c076a146db0/sv-benchmarks/c/pthread-complex/safestack_relacy.i[78860,78873] [2022-10-17 10:54:52,552 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:54:52,559 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 10:54:52,616 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad963cfa-b14e-4937-8333-0c076a146db0/sv-benchmarks/c/pthread-complex/safestack_relacy.i[78860,78873] [2022-10-17 10:54:52,628 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:54:52,811 INFO L208 MainTranslator]: Completed translation [2022-10-17 10:54:52,811 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:54:52 WrapperNode [2022-10-17 10:54:52,811 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 10:54:52,812 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 10:54:52,813 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 10:54:52,813 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 10:54:52,820 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:54:52" (1/1) ... [2022-10-17 10:54:52,859 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:54:52" (1/1) ... [2022-10-17 10:54:52,899 INFO L138 Inliner]: procedures = 481, calls = 74, calls flagged for inlining = 19, calls inlined = 19, statements flattened = 283 [2022-10-17 10:54:52,900 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 10:54:52,900 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 10:54:52,900 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 10:54:52,901 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 10:54:52,910 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:54:52" (1/1) ... [2022-10-17 10:54:52,910 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:54:52" (1/1) ... [2022-10-17 10:54:52,926 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:54:52" (1/1) ... [2022-10-17 10:54:52,927 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:54:52" (1/1) ... [2022-10-17 10:54:52,946 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:54:52" (1/1) ... [2022-10-17 10:54:52,951 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:54:52" (1/1) ... [2022-10-17 10:54:52,957 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:54:52" (1/1) ... [2022-10-17 10:54:52,960 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:54:52" (1/1) ... [2022-10-17 10:54:52,969 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 10:54:52,970 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 10:54:52,970 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 10:54:52,970 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 10:54:52,971 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:54:52" (1/1) ... [2022-10-17 10:54:52,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:54:53,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad963cfa-b14e-4937-8333-0c076a146db0/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:54:53,054 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad963cfa-b14e-4937-8333-0c076a146db0/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 10:54:53,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad963cfa-b14e-4937-8333-0c076a146db0/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 10:54:53,106 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-10-17 10:54:53,107 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-17 10:54:53,107 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-10-17 10:54:53,107 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-17 10:54:53,107 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 10:54:53,107 INFO L130 BoogieDeclarations]: Found specification of procedure thread [2022-10-17 10:54:53,108 INFO L138 BoogieDeclarations]: Found implementation of procedure thread [2022-10-17 10:54:53,113 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 10:54:53,113 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 10:54:53,113 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-17 10:54:53,113 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-17 10:54:53,113 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 10:54:53,115 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-10-17 10:54:53,489 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 10:54:53,491 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 10:54:54,084 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 10:54:54,146 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 10:54:54,147 INFO L300 CfgBuilder]: Removed 7 assume(true) statements. [2022-10-17 10:54:54,151 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:54:54 BoogieIcfgContainer [2022-10-17 10:54:54,152 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 10:54:54,154 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 10:54:54,154 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 10:54:54,158 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 10:54:54,158 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 10:54:51" (1/3) ... [2022-10-17 10:54:54,159 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@256d7d4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:54:54, skipping insertion in model container [2022-10-17 10:54:54,159 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:54:52" (2/3) ... [2022-10-17 10:54:54,159 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@256d7d4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:54:54, skipping insertion in model container [2022-10-17 10:54:54,159 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:54:54" (3/3) ... [2022-10-17 10:54:54,160 INFO L112 eAbstractionObserver]: Analyzing ICFG safestack_relacy.i [2022-10-17 10:54:54,169 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-10-17 10:54:54,179 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 10:54:54,179 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 10:54:54,179 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-10-17 10:54:54,292 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-10-17 10:54:54,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 269 places, 283 transitions, 574 flow [2022-10-17 10:54:54,500 INFO L130 PetriNetUnfolder]: 19/298 cut-off events. [2022-10-17 10:54:54,500 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-10-17 10:54:54,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 304 conditions, 298 events. 19/298 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 455 event pairs, 0 based on Foata normal form. 0/275 useless extension candidates. Maximal degree in co-relation 206. Up to 4 conditions per place. [2022-10-17 10:54:54,510 INFO L82 GeneralOperation]: Start removeDead. Operand has 269 places, 283 transitions, 574 flow [2022-10-17 10:54:54,522 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 265 places, 278 transitions, 561 flow [2022-10-17 10:54:54,543 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 10:54:54,549 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;@e8fb986, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 10:54:54,549 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-10-17 10:54:54,578 INFO L130 PetriNetUnfolder]: 8/124 cut-off events. [2022-10-17 10:54:54,579 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-10-17 10:54:54,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:54:54,580 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:54:54,580 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:54:54,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:54:54,585 INFO L85 PathProgramCache]: Analyzing trace with hash 391858680, now seen corresponding path program 1 times [2022-10-17 10:54:54,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:54:54,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825464192] [2022-10-17 10:54:54,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:54:54,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:54:54,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:54:55,378 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-10-17 10:54:55,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:54:55,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825464192] [2022-10-17 10:54:55,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825464192] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:54:55,380 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:54:55,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 10:54:55,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667716473] [2022-10-17 10:54:55,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:54:55,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 10:54:55,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:54:55,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 10:54:55,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:54:55,427 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 253 out of 283 [2022-10-17 10:54:55,437 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 278 transitions, 561 flow. Second operand has 5 states, 5 states have (on average 254.8) internal successors, (1274), 5 states have internal predecessors, (1274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:54:55,439 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:54:55,439 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 253 of 283 [2022-10-17 10:54:55,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:54:55,617 INFO L130 PetriNetUnfolder]: 7/291 cut-off events. [2022-10-17 10:54:55,617 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-10-17 10:54:55,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 320 conditions, 291 events. 7/291 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 313 event pairs, 0 based on Foata normal form. 21/300 useless extension candidates. Maximal degree in co-relation 203. Up to 17 conditions per place. [2022-10-17 10:54:55,621 INFO L137 encePairwiseOnDemand]: 269/283 looper letters, 19 selfloop transitions, 4 changer transitions 0/272 dead transitions. [2022-10-17 10:54:55,621 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 272 transitions, 595 flow [2022-10-17 10:54:55,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 10:54:55,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-10-17 10:54:55,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1299 transitions. [2022-10-17 10:54:55,648 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9180212014134276 [2022-10-17 10:54:55,649 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1299 transitions. [2022-10-17 10:54:55,650 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1299 transitions. [2022-10-17 10:54:55,655 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:54:55,657 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1299 transitions. [2022-10-17 10:54:55,666 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 259.8) internal successors, (1299), 5 states have internal predecessors, (1299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:54:55,678 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 283.0) internal successors, (1698), 6 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:54:55,679 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 283.0) internal successors, (1698), 6 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:54:55,681 INFO L175 Difference]: Start difference. First operand has 265 places, 278 transitions, 561 flow. Second operand 5 states and 1299 transitions. [2022-10-17 10:54:55,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 272 transitions, 595 flow [2022-10-17 10:54:55,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 272 transitions, 595 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-10-17 10:54:55,698 INFO L231 Difference]: Finished difference. Result has 269 places, 269 transitions, 557 flow [2022-10-17 10:54:55,701 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=541, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=557, PETRI_PLACES=269, PETRI_TRANSITIONS=269} [2022-10-17 10:54:55,705 INFO L287 CegarLoopForPetriNet]: 265 programPoint places, 4 predicate places. [2022-10-17 10:54:55,706 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 269 transitions, 557 flow [2022-10-17 10:54:55,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 254.8) internal successors, (1274), 5 states have internal predecessors, (1274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:54:55,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:54:55,708 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:54:55,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 10:54:55,709 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:54:55,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:54:55,710 INFO L85 PathProgramCache]: Analyzing trace with hash -581283984, now seen corresponding path program 1 times [2022-10-17 10:54:55,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:54:55,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782460968] [2022-10-17 10:54:55,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:54:55,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:54:55,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:54:56,182 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-10-17 10:54:56,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:54:56,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782460968] [2022-10-17 10:54:56,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782460968] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:54:56,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577334795] [2022-10-17 10:54:56,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:54:56,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:54:56,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad963cfa-b14e-4937-8333-0c076a146db0/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:54:56,190 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad963cfa-b14e-4937-8333-0c076a146db0/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:54:56,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad963cfa-b14e-4937-8333-0c076a146db0/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 10:54:56,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:54:56,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 6 conjunts are in the unsatisfiable core [2022-10-17 10:54:56,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:54:56,606 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-10-17 10:54:56,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:54:56,740 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-10-17 10:54:56,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577334795] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:54:56,740 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:54:56,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-10-17 10:54:56,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090068449] [2022-10-17 10:54:56,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:54:56,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-10-17 10:54:56,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:54:56,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-10-17 10:54:56,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2022-10-17 10:54:56,753 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 252 out of 283 [2022-10-17 10:54:56,760 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 269 transitions, 557 flow. Second operand has 15 states, 15 states have (on average 254.2) internal successors, (3813), 15 states have internal predecessors, (3813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:54:56,760 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:54:56,761 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 252 of 283 [2022-10-17 10:54:56,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:54:56,980 INFO L130 PetriNetUnfolder]: 7/293 cut-off events. [2022-10-17 10:54:56,980 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-10-17 10:54:56,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 334 conditions, 293 events. 7/293 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 298 event pairs, 0 based on Foata normal form. 1/283 useless extension candidates. Maximal degree in co-relation 256. Up to 14 conditions per place. [2022-10-17 10:54:56,983 INFO L137 encePairwiseOnDemand]: 275/283 looper letters, 18 selfloop transitions, 8 changer transitions 0/274 dead transitions. [2022-10-17 10:54:56,983 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 274 transitions, 619 flow [2022-10-17 10:54:56,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-17 10:54:56,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-10-17 10:54:56,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2043 transitions. [2022-10-17 10:54:56,991 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9023851590106007 [2022-10-17 10:54:56,991 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2043 transitions. [2022-10-17 10:54:56,991 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2043 transitions. [2022-10-17 10:54:56,993 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:54:56,993 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2043 transitions. [2022-10-17 10:54:57,000 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 255.375) internal successors, (2043), 8 states have internal predecessors, (2043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:54:57,007 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 283.0) internal successors, (2547), 9 states have internal predecessors, (2547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:54:57,009 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 283.0) internal successors, (2547), 9 states have internal predecessors, (2547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:54:57,010 INFO L175 Difference]: Start difference. First operand has 269 places, 269 transitions, 557 flow. Second operand 8 states and 2043 transitions. [2022-10-17 10:54:57,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 274 transitions, 619 flow [2022-10-17 10:54:57,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 274 transitions, 613 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-10-17 10:54:57,019 INFO L231 Difference]: Finished difference. Result has 277 places, 272 transitions, 592 flow [2022-10-17 10:54:57,020 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=551, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=592, PETRI_PLACES=277, PETRI_TRANSITIONS=272} [2022-10-17 10:54:57,021 INFO L287 CegarLoopForPetriNet]: 265 programPoint places, 12 predicate places. [2022-10-17 10:54:57,021 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 272 transitions, 592 flow [2022-10-17 10:54:57,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 254.2) internal successors, (3813), 15 states have internal predecessors, (3813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:54:57,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:54:57,025 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:54:57,061 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad963cfa-b14e-4937-8333-0c076a146db0/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-17 10:54:57,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad963cfa-b14e-4937-8333-0c076a146db0/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:54:57,249 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:54:57,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:54:57,250 INFO L85 PathProgramCache]: Analyzing trace with hash -981750024, now seen corresponding path program 2 times [2022-10-17 10:54:57,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:54:57,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319803442] [2022-10-17 10:54:57,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:54:57,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:54:57,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-10-17 10:54:57,323 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-10-17 10:54:57,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-10-17 10:54:57,413 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-10-17 10:54:57,413 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-10-17 10:54:57,414 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2022-10-17 10:54:57,416 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2022-10-17 10:54:57,417 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2022-10-17 10:54:57,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-17 10:54:57,417 INFO L444 BasicCegarLoop]: Path program histogram: [2, 1] [2022-10-17 10:54:57,420 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-10-17 10:54:57,420 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-10-17 10:54:57,546 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-10-17 10:54:57,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 446 places, 471 transitions, 960 flow [2022-10-17 10:54:57,712 INFO L130 PetriNetUnfolder]: 36/524 cut-off events. [2022-10-17 10:54:57,712 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-10-17 10:54:57,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 538 conditions, 524 events. 36/524 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1635 event pairs, 0 based on Foata normal form. 0/482 useless extension candidates. Maximal degree in co-relation 406. Up to 8 conditions per place. [2022-10-17 10:54:57,728 INFO L82 GeneralOperation]: Start removeDead. Operand has 446 places, 471 transitions, 960 flow [2022-10-17 10:54:57,737 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 446 places, 471 transitions, 960 flow [2022-10-17 10:54:57,739 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 10:54:57,745 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;@e8fb986, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 10:54:57,746 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-10-17 10:54:57,762 INFO L130 PetriNetUnfolder]: 8/137 cut-off events. [2022-10-17 10:54:57,762 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-10-17 10:54:57,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:54:57,763 INFO L208 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] [2022-10-17 10:54:57,763 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting threadErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-10-17 10:54:57,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:54:57,764 INFO L85 PathProgramCache]: Analyzing trace with hash -234455768, now seen corresponding path program 1 times [2022-10-17 10:54:57,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:54:57,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085908034] [2022-10-17 10:54:57,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:54:57,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:54:57,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:54:58,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:54:58,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:54:58,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085908034] [2022-10-17 10:54:58,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085908034] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:54:58,039 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:54:58,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 10:54:58,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590785040] [2022-10-17 10:54:58,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:54:58,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 10:54:58,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:54:58,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 10:54:58,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:54:58,046 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 426 out of 471 [2022-10-17 10:54:58,050 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 471 transitions, 960 flow. Second operand has 5 states, 5 states have (on average 428.0) internal successors, (2140), 5 states have internal predecessors, (2140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:54:58,050 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:54:58,050 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 426 of 471 [2022-10-17 10:54:58,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:54:58,772 INFO L130 PetriNetUnfolder]: 106/1904 cut-off events. [2022-10-17 10:54:58,772 INFO L131 PetriNetUnfolder]: For 89/95 co-relation queries the response was YES. [2022-10-17 10:54:58,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2103 conditions, 1904 events. 106/1904 cut-off events. For 89/95 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 12921 event pairs, 54 based on Foata normal form. 205/2009 useless extension candidates. Maximal degree in co-relation 438. Up to 136 conditions per place. [2022-10-17 10:54:58,798 INFO L137 encePairwiseOnDemand]: 451/471 looper letters, 28 selfloop transitions, 4 changer transitions 0/458 dead transitions. [2022-10-17 10:54:58,799 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 458 transitions, 998 flow [2022-10-17 10:54:58,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 10:54:58,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-10-17 10:54:58,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 2179 transitions. [2022-10-17 10:54:58,806 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9252653927813164 [2022-10-17 10:54:58,806 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 2179 transitions. [2022-10-17 10:54:58,806 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 2179 transitions. [2022-10-17 10:54:58,808 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:54:58,808 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 2179 transitions. [2022-10-17 10:54:58,815 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 435.8) internal successors, (2179), 5 states have internal predecessors, (2179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:54:58,823 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 471.0) internal successors, (2826), 6 states have internal predecessors, (2826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:54:58,826 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 471.0) internal successors, (2826), 6 states have internal predecessors, (2826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:54:58,826 INFO L175 Difference]: Start difference. First operand has 446 places, 471 transitions, 960 flow. Second operand 5 states and 2179 transitions. [2022-10-17 10:54:58,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 458 transitions, 998 flow [2022-10-17 10:54:58,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 458 transitions, 998 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-10-17 10:54:58,838 INFO L231 Difference]: Finished difference. Result has 449 places, 455 transitions, 942 flow [2022-10-17 10:54:58,840 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=926, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=942, PETRI_PLACES=449, PETRI_TRANSITIONS=455} [2022-10-17 10:54:58,846 INFO L287 CegarLoopForPetriNet]: 446 programPoint places, 3 predicate places. [2022-10-17 10:54:58,846 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 455 transitions, 942 flow [2022-10-17 10:54:58,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 428.0) internal successors, (2140), 5 states have internal predecessors, (2140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:54:58,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:54:58,849 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:54:58,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-17 10:54:58,850 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-10-17 10:54:58,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:54:58,851 INFO L85 PathProgramCache]: Analyzing trace with hash 859059597, now seen corresponding path program 1 times [2022-10-17 10:54:58,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:54:58,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444873464] [2022-10-17 10:54:58,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:54:58,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:54:58,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:54:59,204 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-10-17 10:54:59,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:54:59,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444873464] [2022-10-17 10:54:59,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444873464] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:54:59,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9646632] [2022-10-17 10:54:59,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:54:59,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:54:59,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad963cfa-b14e-4937-8333-0c076a146db0/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:54:59,209 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad963cfa-b14e-4937-8333-0c076a146db0/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:54:59,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad963cfa-b14e-4937-8333-0c076a146db0/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-17 10:54:59,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:54:59,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 6 conjunts are in the unsatisfiable core [2022-10-17 10:54:59,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:54:59,537 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-10-17 10:54:59,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:54:59,631 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-10-17 10:54:59,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9646632] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:54:59,636 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:54:59,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-10-17 10:54:59,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235547326] [2022-10-17 10:54:59,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:54:59,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-10-17 10:54:59,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:54:59,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-10-17 10:54:59,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2022-10-17 10:54:59,653 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 425 out of 471 [2022-10-17 10:54:59,663 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 455 transitions, 942 flow. Second operand has 15 states, 15 states have (on average 427.26666666666665) internal successors, (6409), 15 states have internal predecessors, (6409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:54:59,663 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:54:59,664 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 425 of 471 [2022-10-17 10:54:59,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:55:00,380 INFO L130 PetriNetUnfolder]: 106/1906 cut-off events. [2022-10-17 10:55:00,380 INFO L131 PetriNetUnfolder]: For 93/99 co-relation queries the response was YES. [2022-10-17 10:55:00,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2117 conditions, 1906 events. 106/1906 cut-off events. For 93/99 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 12955 event pairs, 54 based on Foata normal form. 1/1808 useless extension candidates. Maximal degree in co-relation 2038. Up to 133 conditions per place. [2022-10-17 10:55:00,415 INFO L137 encePairwiseOnDemand]: 463/471 looper letters, 27 selfloop transitions, 8 changer transitions 0/460 dead transitions. [2022-10-17 10:55:00,415 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 460 transitions, 1022 flow [2022-10-17 10:55:00,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-17 10:55:00,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-10-17 10:55:00,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 3436 transitions. [2022-10-17 10:55:00,428 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9118895966029724 [2022-10-17 10:55:00,428 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 3436 transitions. [2022-10-17 10:55:00,428 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 3436 transitions. [2022-10-17 10:55:00,431 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:55:00,432 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 3436 transitions. [2022-10-17 10:55:00,444 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 429.5) internal successors, (3436), 8 states have internal predecessors, (3436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:55:00,455 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 471.0) internal successors, (4239), 9 states have internal predecessors, (4239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:55:00,457 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 471.0) internal successors, (4239), 9 states have internal predecessors, (4239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:55:00,458 INFO L175 Difference]: Start difference. First operand has 449 places, 455 transitions, 942 flow. Second operand 8 states and 3436 transitions. [2022-10-17 10:55:00,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 460 transitions, 1022 flow [2022-10-17 10:55:00,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 460 transitions, 1016 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-10-17 10:55:00,473 INFO L231 Difference]: Finished difference. Result has 457 places, 458 transitions, 977 flow [2022-10-17 10:55:00,474 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=936, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=977, PETRI_PLACES=457, PETRI_TRANSITIONS=458} [2022-10-17 10:55:00,476 INFO L287 CegarLoopForPetriNet]: 446 programPoint places, 11 predicate places. [2022-10-17 10:55:00,476 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 458 transitions, 977 flow [2022-10-17 10:55:00,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 427.26666666666665) internal successors, (6409), 15 states have internal predecessors, (6409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:55:00,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:55:00,481 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:55:00,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad963cfa-b14e-4937-8333-0c076a146db0/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-17 10:55:00,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad963cfa-b14e-4937-8333-0c076a146db0/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:55:00,697 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-10-17 10:55:00,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:55:00,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1040629684, now seen corresponding path program 2 times [2022-10-17 10:55:00,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:55:00,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84486662] [2022-10-17 10:55:00,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:55:00,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:55:00,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-10-17 10:55:00,758 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-10-17 10:55:00,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-10-17 10:55:00,847 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-10-17 10:55:00,847 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-10-17 10:55:00,848 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-10-17 10:55:00,848 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-10-17 10:55:00,848 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-10-17 10:55:00,848 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-10-17 10:55:00,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-10-17 10:55:00,849 INFO L444 BasicCegarLoop]: Path program histogram: [2, 1] [2022-10-17 10:55:00,849 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-10-17 10:55:00,850 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-10-17 10:55:00,964 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-10-17 10:55:00,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 623 places, 659 transitions, 1348 flow [2022-10-17 10:55:01,263 INFO L130 PetriNetUnfolder]: 58/779 cut-off events. [2022-10-17 10:55:01,264 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-10-17 10:55:01,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 807 conditions, 779 events. 58/779 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 3306 event pairs, 1 based on Foata normal form. 0/714 useless extension candidates. Maximal degree in co-relation 622. Up to 16 conditions per place. [2022-10-17 10:55:01,301 INFO L82 GeneralOperation]: Start removeDead. Operand has 623 places, 659 transitions, 1348 flow [2022-10-17 10:55:01,314 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 623 places, 659 transitions, 1348 flow [2022-10-17 10:55:01,316 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 10:55:01,317 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;@e8fb986, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 10:55:01,317 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-10-17 10:55:01,331 INFO L130 PetriNetUnfolder]: 9/138 cut-off events. [2022-10-17 10:55:01,332 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-10-17 10:55:01,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:55:01,332 INFO L208 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] [2022-10-17 10:55:01,332 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting threadErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-10-17 10:55:01,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:55:01,333 INFO L85 PathProgramCache]: Analyzing trace with hash 569346869, now seen corresponding path program 1 times [2022-10-17 10:55:01,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:55:01,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794101418] [2022-10-17 10:55:01,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:55:01,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:55:01,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:55:01,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:55:01,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:55:01,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794101418] [2022-10-17 10:55:01,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794101418] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:55:01,388 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:55:01,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 10:55:01,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380316106] [2022-10-17 10:55:01,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:55:01,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-10-17 10:55:01,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:55:01,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-10-17 10:55:01,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-17 10:55:01,392 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 611 out of 659 [2022-10-17 10:55:01,394 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 623 places, 659 transitions, 1348 flow. Second operand has 2 states, 2 states have (on average 612.5) internal successors, (1225), 2 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:55:01,395 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:55:01,395 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 611 of 659 [2022-10-17 10:55:01,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:55:06,144 INFO L130 PetriNetUnfolder]: 1281/14311 cut-off events. [2022-10-17 10:55:06,144 INFO L131 PetriNetUnfolder]: For 1141/1225 co-relation queries the response was YES. [2022-10-17 10:55:06,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16377 conditions, 14311 events. 1281/14311 cut-off events. For 1141/1225 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 174361 event pairs, 907 based on Foata normal form. 1918/15424 useless extension candidates. Maximal degree in co-relation 2052. Up to 1498 conditions per place. [2022-10-17 10:55:06,538 INFO L137 encePairwiseOnDemand]: 638/659 looper letters, 24 selfloop transitions, 0 changer transitions 0/635 dead transitions. [2022-10-17 10:55:06,542 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 621 places, 635 transitions, 1348 flow [2022-10-17 10:55:06,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-17 10:55:06,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-10-17 10:55:06,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 1267 transitions. [2022-10-17 10:55:06,552 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9613050075872535 [2022-10-17 10:55:06,552 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 1267 transitions. [2022-10-17 10:55:06,553 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 1267 transitions. [2022-10-17 10:55:06,554 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:55:06,554 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 1267 transitions. [2022-10-17 10:55:06,558 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 633.5) internal successors, (1267), 2 states have internal predecessors, (1267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:55:06,571 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 659.0) internal successors, (1977), 3 states have internal predecessors, (1977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:55:06,580 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 659.0) internal successors, (1977), 3 states have internal predecessors, (1977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:55:06,580 INFO L175 Difference]: Start difference. First operand has 623 places, 659 transitions, 1348 flow. Second operand 2 states and 1267 transitions. [2022-10-17 10:55:06,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 621 places, 635 transitions, 1348 flow [2022-10-17 10:55:06,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 621 places, 635 transitions, 1348 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-10-17 10:55:06,598 INFO L231 Difference]: Finished difference. Result has 621 places, 635 transitions, 1300 flow [2022-10-17 10:55:06,600 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=659, PETRI_DIFFERENCE_MINUEND_FLOW=1300, PETRI_DIFFERENCE_MINUEND_PLACES=620, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=635, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=635, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=1300, PETRI_PLACES=621, PETRI_TRANSITIONS=635} [2022-10-17 10:55:06,602 INFO L287 CegarLoopForPetriNet]: 623 programPoint places, -2 predicate places. [2022-10-17 10:55:06,603 INFO L495 AbstractCegarLoop]: Abstraction has has 621 places, 635 transitions, 1300 flow [2022-10-17 10:55:06,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 612.5) internal successors, (1225), 2 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:55:06,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:55:06,604 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:55:06,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-10-17 10:55:06,604 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-10-17 10:55:06,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:55:06,605 INFO L85 PathProgramCache]: Analyzing trace with hash 2093576529, now seen corresponding path program 1 times [2022-10-17 10:55:06,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:55:06,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000376733] [2022-10-17 10:55:06,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:55:06,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:55:06,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:55:06,791 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-10-17 10:55:06,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:55:06,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000376733] [2022-10-17 10:55:06,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000376733] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:55:06,792 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:55:06,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 10:55:06,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207349113] [2022-10-17 10:55:06,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:55:06,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 10:55:06,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:55:06,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 10:55:06,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:55:06,798 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 599 out of 659 [2022-10-17 10:55:06,801 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 621 places, 635 transitions, 1300 flow. Second operand has 5 states, 5 states have (on average 601.2) internal successors, (3006), 5 states have internal predecessors, (3006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:55:06,802 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:55:06,802 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 599 of 659 [2022-10-17 10:55:06,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:55:10,857 INFO L130 PetriNetUnfolder]: 1281/14321 cut-off events. [2022-10-17 10:55:10,857 INFO L131 PetriNetUnfolder]: For 1141/1225 co-relation queries the response was YES. [2022-10-17 10:55:11,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16404 conditions, 14321 events. 1281/14321 cut-off events. For 1141/1225 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 173902 event pairs, 907 based on Foata normal form. 0/13516 useless extension candidates. Maximal degree in co-relation 16398. Up to 1507 conditions per place. [2022-10-17 10:55:11,090 INFO L137 encePairwiseOnDemand]: 654/659 looper letters, 36 selfloop transitions, 4 changer transitions 0/639 dead transitions. [2022-10-17 10:55:11,090 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 625 places, 639 transitions, 1388 flow [2022-10-17 10:55:11,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 10:55:11,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-10-17 10:55:11,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 3036 transitions. [2022-10-17 10:55:11,100 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9213960546282246 [2022-10-17 10:55:11,100 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 3036 transitions. [2022-10-17 10:55:11,100 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 3036 transitions. [2022-10-17 10:55:11,103 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:55:11,103 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 3036 transitions. [2022-10-17 10:55:11,110 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 607.2) internal successors, (3036), 5 states have internal predecessors, (3036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:55:11,118 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 659.0) internal successors, (3954), 6 states have internal predecessors, (3954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:55:11,119 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 659.0) internal successors, (3954), 6 states have internal predecessors, (3954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:55:11,119 INFO L175 Difference]: Start difference. First operand has 621 places, 635 transitions, 1300 flow. Second operand 5 states and 3036 transitions. [2022-10-17 10:55:11,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 625 places, 639 transitions, 1388 flow [2022-10-17 10:55:11,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 625 places, 639 transitions, 1388 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-10-17 10:55:11,136 INFO L231 Difference]: Finished difference. Result has 626 places, 636 transitions, 1316 flow [2022-10-17 10:55:11,137 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=659, PETRI_DIFFERENCE_MINUEND_FLOW=1300, PETRI_DIFFERENCE_MINUEND_PLACES=621, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=635, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=631, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1316, PETRI_PLACES=626, PETRI_TRANSITIONS=636} [2022-10-17 10:55:11,138 INFO L287 CegarLoopForPetriNet]: 623 programPoint places, 3 predicate places. [2022-10-17 10:55:11,138 INFO L495 AbstractCegarLoop]: Abstraction has has 626 places, 636 transitions, 1316 flow [2022-10-17 10:55:11,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 601.2) internal successors, (3006), 5 states have internal predecessors, (3006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:55:11,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:55:11,140 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:55:11,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-10-17 10:55:11,140 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-10-17 10:55:11,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:55:11,141 INFO L85 PathProgramCache]: Analyzing trace with hash -803268385, now seen corresponding path program 1 times [2022-10-17 10:55:11,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:55:11,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402869336] [2022-10-17 10:55:11,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:55:11,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:55:11,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:55:11,406 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-10-17 10:55:11,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:55:11,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402869336] [2022-10-17 10:55:11,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402869336] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:55:11,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304874445] [2022-10-17 10:55:11,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:55:11,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:55:11,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad963cfa-b14e-4937-8333-0c076a146db0/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:55:11,413 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad963cfa-b14e-4937-8333-0c076a146db0/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:55:11,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad963cfa-b14e-4937-8333-0c076a146db0/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-17 10:55:11,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:55:11,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 6 conjunts are in the unsatisfiable core [2022-10-17 10:55:11,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:55:11,744 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-10-17 10:55:11,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:55:11,838 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-10-17 10:55:11,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304874445] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:55:11,839 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:55:11,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-10-17 10:55:11,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52467753] [2022-10-17 10:55:11,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:55:11,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-10-17 10:55:11,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:55:11,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-10-17 10:55:11,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2022-10-17 10:55:11,851 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 598 out of 659 [2022-10-17 10:55:11,860 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 626 places, 636 transitions, 1316 flow. Second operand has 15 states, 15 states have (on average 600.3333333333334) internal successors, (9005), 15 states have internal predecessors, (9005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:55:11,860 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:55:11,861 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 598 of 659 [2022-10-17 10:55:11,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:55:15,973 INFO L130 PetriNetUnfolder]: 1281/14323 cut-off events. [2022-10-17 10:55:15,973 INFO L131 PetriNetUnfolder]: For 1145/1229 co-relation queries the response was YES. [2022-10-17 10:55:16,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16418 conditions, 14323 events. 1281/14323 cut-off events. For 1145/1229 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 174196 event pairs, 907 based on Foata normal form. 1/13520 useless extension candidates. Maximal degree in co-relation 16410. Up to 1504 conditions per place. [2022-10-17 10:55:16,163 INFO L137 encePairwiseOnDemand]: 651/659 looper letters, 35 selfloop transitions, 8 changer transitions 0/641 dead transitions. [2022-10-17 10:55:16,164 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 633 places, 641 transitions, 1412 flow [2022-10-17 10:55:16,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-17 10:55:16,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-10-17 10:55:16,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 4828 transitions. [2022-10-17 10:55:16,178 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9157814871016692 [2022-10-17 10:55:16,178 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 4828 transitions. [2022-10-17 10:55:16,178 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 4828 transitions. [2022-10-17 10:55:16,182 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:55:16,182 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 4828 transitions. [2022-10-17 10:55:16,194 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 603.5) internal successors, (4828), 8 states have internal predecessors, (4828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:55:16,206 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 659.0) internal successors, (5931), 9 states have internal predecessors, (5931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:55:16,208 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 659.0) internal successors, (5931), 9 states have internal predecessors, (5931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:55:16,208 INFO L175 Difference]: Start difference. First operand has 626 places, 636 transitions, 1316 flow. Second operand 8 states and 4828 transitions. [2022-10-17 10:55:16,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 633 places, 641 transitions, 1412 flow [2022-10-17 10:55:16,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 630 places, 641 transitions, 1406 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-10-17 10:55:16,225 INFO L231 Difference]: Finished difference. Result has 634 places, 639 transitions, 1351 flow [2022-10-17 10:55:16,226 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=659, PETRI_DIFFERENCE_MINUEND_FLOW=1310, PETRI_DIFFERENCE_MINUEND_PLACES=623, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=636, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=628, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1351, PETRI_PLACES=634, PETRI_TRANSITIONS=639} [2022-10-17 10:55:16,227 INFO L287 CegarLoopForPetriNet]: 623 programPoint places, 11 predicate places. [2022-10-17 10:55:16,227 INFO L495 AbstractCegarLoop]: Abstraction has has 634 places, 639 transitions, 1351 flow [2022-10-17 10:55:16,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 600.3333333333334) internal successors, (9005), 15 states have internal predecessors, (9005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:55:16,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:55:16,231 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:55:16,265 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad963cfa-b14e-4937-8333-0c076a146db0/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-10-17 10:55:16,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad963cfa-b14e-4937-8333-0c076a146db0/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-10-17 10:55:16,445 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-10-17 10:55:16,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:55:16,446 INFO L85 PathProgramCache]: Analyzing trace with hash -1391145839, now seen corresponding path program 2 times [2022-10-17 10:55:16,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:55:16,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905852158] [2022-10-17 10:55:16,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:55:16,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:55:16,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:55:16,682 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 26 proven. 19 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-10-17 10:55:16,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:55:16,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905852158] [2022-10-17 10:55:16,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905852158] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:55:16,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606567743] [2022-10-17 10:55:16,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-17 10:55:16,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:55:16,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad963cfa-b14e-4937-8333-0c076a146db0/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:55:16,684 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad963cfa-b14e-4937-8333-0c076a146db0/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:55:16,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad963cfa-b14e-4937-8333-0c076a146db0/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-17 10:55:16,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-17 10:55:16,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:55:16,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 5 conjunts are in the unsatisfiable core [2022-10-17 10:55:16,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:55:16,943 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-10-17 10:55:16,943 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 10:55:16,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606567743] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:55:16,944 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 10:55:16,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2022-10-17 10:55:16,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616825352] [2022-10-17 10:55:16,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:55:16,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 10:55:16,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:55:16,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 10:55:16,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-10-17 10:55:16,949 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 597 out of 659 [2022-10-17 10:55:16,953 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 634 places, 639 transitions, 1351 flow. Second operand has 6 states, 6 states have (on average 600.3333333333334) internal successors, (3602), 6 states have internal predecessors, (3602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:55:16,953 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:55:16,953 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 597 of 659 [2022-10-17 10:55:16,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand