./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c --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_6dca9e5e-c810-495b-a053-abda86c10301/bin/uautomizer-J5u9QxTXDZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dca9e5e-c810-495b-a053-abda86c10301/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_6dca9e5e-c810-495b-a053-abda86c10301/bin/uautomizer-J5u9QxTXDZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dca9e5e-c810-495b-a053-abda86c10301/bin/uautomizer-J5u9QxTXDZ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dca9e5e-c810-495b-a053-abda86c10301/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_6dca9e5e-c810-495b-a053-abda86c10301/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 c642b478618f67be61772197bb614a61e988cb880f57faee5dd0470714f61e7e --- 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 11:08:12,314 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 11:08:12,317 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 11:08:12,372 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 11:08:12,373 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 11:08:12,377 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 11:08:12,380 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 11:08:12,383 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 11:08:12,388 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 11:08:12,391 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 11:08:12,392 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 11:08:12,393 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 11:08:12,394 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 11:08:12,395 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 11:08:12,396 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 11:08:12,397 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 11:08:12,398 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 11:08:12,399 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 11:08:12,401 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 11:08:12,404 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 11:08:12,405 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 11:08:12,409 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 11:08:12,410 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 11:08:12,412 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 11:08:12,422 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 11:08:12,423 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 11:08:12,423 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 11:08:12,424 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 11:08:12,426 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 11:08:12,427 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 11:08:12,428 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 11:08:12,429 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 11:08:12,431 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 11:08:12,432 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 11:08:12,433 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 11:08:12,433 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 11:08:12,434 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 11:08:12,434 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 11:08:12,434 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 11:08:12,435 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 11:08:12,436 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 11:08:12,437 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dca9e5e-c810-495b-a053-abda86c10301/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-10-17 11:08:12,499 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 11:08:12,500 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 11:08:12,501 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 11:08:12,501 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 11:08:12,502 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 11:08:12,502 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 11:08:12,503 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-17 11:08:12,503 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-17 11:08:12,503 INFO L138 SettingsManager]: * Use SBE=true [2022-10-17 11:08:12,503 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 11:08:12,505 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 11:08:12,505 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 11:08:12,505 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 11:08:12,505 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 11:08:12,506 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 11:08:12,506 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 11:08:12,506 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 11:08:12,506 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 11:08:12,507 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 11:08:12,507 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 11:08:12,507 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 11:08:12,507 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 11:08:12,508 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-17 11:08:12,508 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 11:08:12,508 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 11:08:12,508 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 11:08:12,509 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 11:08:12,509 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 11:08:12,509 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-17 11:08:12,510 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 11:08:12,510 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-10-17 11:08:12,510 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-10-17 11:08:12,510 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 11:08:12,511 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_6dca9e5e-c810-495b-a053-abda86c10301/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dca9e5e-c810-495b-a053-abda86c10301/bin/uautomizer-J5u9QxTXDZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c642b478618f67be61772197bb614a61e988cb880f57faee5dd0470714f61e7e [2022-10-17 11:08:12,794 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 11:08:12,813 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 11:08:12,815 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 11:08:12,817 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 11:08:12,817 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 11:08:12,819 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dca9e5e-c810-495b-a053-abda86c10301/bin/uautomizer-J5u9QxTXDZ/../../sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c [2022-10-17 11:08:12,887 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dca9e5e-c810-495b-a053-abda86c10301/bin/uautomizer-J5u9QxTXDZ/data/3b28aa2f8/ecaae5acff01471d88bc4eb238cd153b/FLAGfd213c1b1 [2022-10-17 11:08:13,387 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 11:08:13,388 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dca9e5e-c810-495b-a053-abda86c10301/sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c [2022-10-17 11:08:13,394 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dca9e5e-c810-495b-a053-abda86c10301/bin/uautomizer-J5u9QxTXDZ/data/3b28aa2f8/ecaae5acff01471d88bc4eb238cd153b/FLAGfd213c1b1 [2022-10-17 11:08:13,719 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dca9e5e-c810-495b-a053-abda86c10301/bin/uautomizer-J5u9QxTXDZ/data/3b28aa2f8/ecaae5acff01471d88bc4eb238cd153b [2022-10-17 11:08:13,722 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 11:08:13,723 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 11:08:13,724 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 11:08:13,724 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 11:08:13,730 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 11:08:13,731 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 11:08:13" (1/1) ... [2022-10-17 11:08:13,733 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6625e842 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:08:13, skipping insertion in model container [2022-10-17 11:08:13,733 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 11:08:13" (1/1) ... [2022-10-17 11:08:13,740 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 11:08:13,765 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 11:08:14,006 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_6dca9e5e-c810-495b-a053-abda86c10301/sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c[2428,2441] [2022-10-17 11:08:14,017 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 11:08:14,025 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 11:08:14,044 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_6dca9e5e-c810-495b-a053-abda86c10301/sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c[2428,2441] [2022-10-17 11:08:14,050 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 11:08:14,064 INFO L208 MainTranslator]: Completed translation [2022-10-17 11:08:14,064 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:08:14 WrapperNode [2022-10-17 11:08:14,065 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 11:08:14,066 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 11:08:14,066 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 11:08:14,066 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 11:08:14,081 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:08:14" (1/1) ... [2022-10-17 11:08:14,089 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:08:14" (1/1) ... [2022-10-17 11:08:14,127 INFO L138 Inliner]: procedures = 26, calls = 40, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 144 [2022-10-17 11:08:14,127 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 11:08:14,128 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 11:08:14,128 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 11:08:14,128 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 11:08:14,137 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:08:14" (1/1) ... [2022-10-17 11:08:14,137 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:08:14" (1/1) ... [2022-10-17 11:08:14,150 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:08:14" (1/1) ... [2022-10-17 11:08:14,152 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:08:14" (1/1) ... [2022-10-17 11:08:14,159 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:08:14" (1/1) ... [2022-10-17 11:08:14,174 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:08:14" (1/1) ... [2022-10-17 11:08:14,176 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:08:14" (1/1) ... [2022-10-17 11:08:14,187 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:08:14" (1/1) ... [2022-10-17 11:08:14,190 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 11:08:14,191 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 11:08:14,193 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 11:08:14,194 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 11:08:14,194 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:08:14" (1/1) ... [2022-10-17 11:08:14,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 11:08:14,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dca9e5e-c810-495b-a053-abda86c10301/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 11:08:14,229 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dca9e5e-c810-495b-a053-abda86c10301/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 11:08:14,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dca9e5e-c810-495b-a053-abda86c10301/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 11:08:14,278 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 11:08:14,279 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-17 11:08:14,279 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-17 11:08:14,279 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-17 11:08:14,279 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-10-17 11:08:14,279 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-10-17 11:08:14,279 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-10-17 11:08:14,280 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-10-17 11:08:14,280 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 11:08:14,280 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-10-17 11:08:14,280 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-10-17 11:08:14,280 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-10-17 11:08:14,281 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 11:08:14,281 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 11:08:14,281 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-17 11:08:14,283 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 11:08:14,369 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 11:08:14,371 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 11:08:14,767 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 11:08:14,949 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 11:08:14,950 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-10-17 11:08:14,952 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 11:08:14 BoogieIcfgContainer [2022-10-17 11:08:14,952 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 11:08:14,954 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 11:08:14,955 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 11:08:14,958 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 11:08:14,958 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 11:08:13" (1/3) ... [2022-10-17 11:08:14,959 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18a38bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 11:08:14, skipping insertion in model container [2022-10-17 11:08:14,960 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:08:14" (2/3) ... [2022-10-17 11:08:14,960 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18a38bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 11:08:14, skipping insertion in model container [2022-10-17 11:08:14,960 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 11:08:14" (3/3) ... [2022-10-17 11:08:14,962 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-counter-queue.wvr.c [2022-10-17 11:08:14,971 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-10-17 11:08:14,981 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 11:08:14,982 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 11:08:14,982 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-10-17 11:08:15,052 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-10-17 11:08:15,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 117 places, 119 transitions, 254 flow [2022-10-17 11:08:15,210 INFO L130 PetriNetUnfolder]: 9/117 cut-off events. [2022-10-17 11:08:15,211 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-10-17 11:08:15,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126 conditions, 117 events. 9/117 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 68 event pairs, 0 based on Foata normal form. 0/107 useless extension candidates. Maximal degree in co-relation 81. Up to 2 conditions per place. [2022-10-17 11:08:15,215 INFO L82 GeneralOperation]: Start removeDead. Operand has 117 places, 119 transitions, 254 flow [2022-10-17 11:08:15,220 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 106 places, 108 transitions, 228 flow [2022-10-17 11:08:15,231 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 11:08:15,239 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;@59e72790, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 11:08:15,239 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-10-17 11:08:15,270 INFO L130 PetriNetUnfolder]: 9/107 cut-off events. [2022-10-17 11:08:15,271 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-10-17 11:08:15,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 11:08:15,272 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, 1, 1, 1, 1, 1] [2022-10-17 11:08:15,272 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 11:08:15,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:08:15,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1565167926, now seen corresponding path program 1 times [2022-10-17 11:08:15,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:08:15,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682882046] [2022-10-17 11:08:15,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:08:15,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:08:15,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:08:15,643 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 11:08:15,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:08:15,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682882046] [2022-10-17 11:08:15,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682882046] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:08:15,644 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 11:08:15,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 11:08:15,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933255203] [2022-10-17 11:08:15,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:08:15,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-10-17 11:08:15,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:08:15,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-10-17 11:08:15,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-17 11:08:15,687 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 119 [2022-10-17 11:08:15,690 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 108 transitions, 228 flow. Second operand has 2 states, 2 states have (on average 109.0) internal successors, (218), 2 states have internal predecessors, (218), 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 11:08:15,690 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 11:08:15,690 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 119 [2022-10-17 11:08:15,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 11:08:15,759 INFO L130 PetriNetUnfolder]: 12/138 cut-off events. [2022-10-17 11:08:15,759 INFO L131 PetriNetUnfolder]: For 21/22 co-relation queries the response was YES. [2022-10-17 11:08:15,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172 conditions, 138 events. 12/138 cut-off events. For 21/22 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 184 event pairs, 3 based on Foata normal form. 13/140 useless extension candidates. Maximal degree in co-relation 79. Up to 19 conditions per place. [2022-10-17 11:08:15,762 INFO L137 encePairwiseOnDemand]: 113/119 looper letters, 6 selfloop transitions, 0 changer transitions 3/102 dead transitions. [2022-10-17 11:08:15,762 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 102 transitions, 228 flow [2022-10-17 11:08:15,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-17 11:08:15,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-10-17 11:08:15,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 224 transitions. [2022-10-17 11:08:15,776 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9411764705882353 [2022-10-17 11:08:15,776 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 224 transitions. [2022-10-17 11:08:15,777 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 224 transitions. [2022-10-17 11:08:15,778 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 11:08:15,781 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 224 transitions. [2022-10-17 11:08:15,784 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 112.0) internal successors, (224), 2 states have internal predecessors, (224), 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 11:08:15,789 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 119.0) internal successors, (357), 3 states have internal predecessors, (357), 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 11:08:15,789 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 119.0) internal successors, (357), 3 states have internal predecessors, (357), 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 11:08:15,791 INFO L175 Difference]: Start difference. First operand has 106 places, 108 transitions, 228 flow. Second operand 2 states and 224 transitions. [2022-10-17 11:08:15,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 102 transitions, 228 flow [2022-10-17 11:08:15,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 102 transitions, 220 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-10-17 11:08:15,800 INFO L231 Difference]: Finished difference. Result has 103 places, 99 transitions, 202 flow [2022-10-17 11:08:15,802 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=119, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=202, PETRI_PLACES=103, PETRI_TRANSITIONS=99} [2022-10-17 11:08:15,805 INFO L287 CegarLoopForPetriNet]: 106 programPoint places, -3 predicate places. [2022-10-17 11:08:15,806 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 99 transitions, 202 flow [2022-10-17 11:08:15,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 109.0) internal successors, (218), 2 states have internal predecessors, (218), 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 11:08:15,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 11:08:15,806 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, 1, 1, 1, 1, 1] [2022-10-17 11:08:15,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 11:08:15,807 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 11:08:15,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:08:15,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1729578090, now seen corresponding path program 1 times [2022-10-17 11:08:15,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:08:15,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548310842] [2022-10-17 11:08:15,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:08:15,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:08:15,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:08:16,216 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 11:08:16,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:08:16,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548310842] [2022-10-17 11:08:16,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548310842] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:08:16,219 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 11:08:16,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 11:08:16,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126547791] [2022-10-17 11:08:16,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:08:16,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 11:08:16,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:08:16,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 11:08:16,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 11:08:16,226 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 119 [2022-10-17 11:08:16,227 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 99 transitions, 202 flow. Second operand has 5 states, 5 states have (on average 91.4) internal successors, (457), 5 states have internal predecessors, (457), 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 11:08:16,227 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 11:08:16,227 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 119 [2022-10-17 11:08:16,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 11:08:16,408 INFO L130 PetriNetUnfolder]: 26/181 cut-off events. [2022-10-17 11:08:16,409 INFO L131 PetriNetUnfolder]: For 10/11 co-relation queries the response was YES. [2022-10-17 11:08:16,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 251 conditions, 181 events. 26/181 cut-off events. For 10/11 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 444 event pairs, 6 based on Foata normal form. 1/171 useless extension candidates. Maximal degree in co-relation 248. Up to 39 conditions per place. [2022-10-17 11:08:16,413 INFO L137 encePairwiseOnDemand]: 113/119 looper letters, 24 selfloop transitions, 3 changer transitions 4/109 dead transitions. [2022-10-17 11:08:16,413 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 109 transitions, 287 flow [2022-10-17 11:08:16,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 11:08:16,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-10-17 11:08:16,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 472 transitions. [2022-10-17 11:08:16,421 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7932773109243697 [2022-10-17 11:08:16,421 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 472 transitions. [2022-10-17 11:08:16,422 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 472 transitions. [2022-10-17 11:08:16,423 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 11:08:16,423 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 472 transitions. [2022-10-17 11:08:16,426 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 94.4) internal successors, (472), 5 states have internal predecessors, (472), 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 11:08:16,431 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 119.0) internal successors, (714), 6 states have internal predecessors, (714), 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 11:08:16,431 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 119.0) internal successors, (714), 6 states have internal predecessors, (714), 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 11:08:16,432 INFO L175 Difference]: Start difference. First operand has 103 places, 99 transitions, 202 flow. Second operand 5 states and 472 transitions. [2022-10-17 11:08:16,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 109 transitions, 287 flow [2022-10-17 11:08:16,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 109 transitions, 287 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-10-17 11:08:16,437 INFO L231 Difference]: Finished difference. Result has 107 places, 101 transitions, 225 flow [2022-10-17 11:08:16,438 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=119, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=225, PETRI_PLACES=107, PETRI_TRANSITIONS=101} [2022-10-17 11:08:16,439 INFO L287 CegarLoopForPetriNet]: 106 programPoint places, 1 predicate places. [2022-10-17 11:08:16,439 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 101 transitions, 225 flow [2022-10-17 11:08:16,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 91.4) internal successors, (457), 5 states have internal predecessors, (457), 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 11:08:16,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 11:08:16,441 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:08:16,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 11:08:16,442 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 11:08:16,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:08:16,444 INFO L85 PathProgramCache]: Analyzing trace with hash 2133352904, now seen corresponding path program 1 times [2022-10-17 11:08:16,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:08:16,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849429876] [2022-10-17 11:08:16,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:08:16,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:08:16,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:08:16,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 11:08:16,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:08:16,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849429876] [2022-10-17 11:08:16,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849429876] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:08:16,810 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 11:08:16,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-10-17 11:08:16,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666559244] [2022-10-17 11:08:16,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:08:16,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-17 11:08:16,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:08:16,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-17 11:08:16,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-10-17 11:08:16,817 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 119 [2022-10-17 11:08:16,819 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 101 transitions, 225 flow. Second operand has 7 states, 7 states have (on average 88.0) internal successors, (616), 7 states have internal predecessors, (616), 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 11:08:16,819 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 11:08:16,819 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 119 [2022-10-17 11:08:16,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 11:08:17,087 INFO L130 PetriNetUnfolder]: 95/406 cut-off events. [2022-10-17 11:08:17,087 INFO L131 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2022-10-17 11:08:17,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 669 conditions, 406 events. 95/406 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1800 event pairs, 42 based on Foata normal form. 0/356 useless extension candidates. Maximal degree in co-relation 662. Up to 136 conditions per place. [2022-10-17 11:08:17,093 INFO L137 encePairwiseOnDemand]: 110/119 looper letters, 37 selfloop transitions, 8 changer transitions 0/119 dead transitions. [2022-10-17 11:08:17,093 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 119 transitions, 356 flow [2022-10-17 11:08:17,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-17 11:08:17,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-10-17 11:08:17,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 726 transitions. [2022-10-17 11:08:17,098 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7626050420168067 [2022-10-17 11:08:17,098 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 726 transitions. [2022-10-17 11:08:17,100 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 726 transitions. [2022-10-17 11:08:17,101 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 11:08:17,101 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 726 transitions. [2022-10-17 11:08:17,104 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 90.75) internal successors, (726), 8 states have internal predecessors, (726), 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 11:08:17,107 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 119.0) internal successors, (1071), 9 states have internal predecessors, (1071), 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 11:08:17,108 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 119.0) internal successors, (1071), 9 states have internal predecessors, (1071), 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 11:08:17,108 INFO L175 Difference]: Start difference. First operand has 107 places, 101 transitions, 225 flow. Second operand 8 states and 726 transitions. [2022-10-17 11:08:17,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 119 transitions, 356 flow [2022-10-17 11:08:17,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 119 transitions, 349 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-10-17 11:08:17,115 INFO L231 Difference]: Finished difference. Result has 112 places, 104 transitions, 254 flow [2022-10-17 11:08:17,116 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=119, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=254, PETRI_PLACES=112, PETRI_TRANSITIONS=104} [2022-10-17 11:08:17,118 INFO L287 CegarLoopForPetriNet]: 106 programPoint places, 6 predicate places. [2022-10-17 11:08:17,119 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 104 transitions, 254 flow [2022-10-17 11:08:17,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 88.0) internal successors, (616), 7 states have internal predecessors, (616), 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 11:08:17,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 11:08:17,120 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:08:17,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-17 11:08:17,121 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 11:08:17,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:08:17,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1727976470, now seen corresponding path program 1 times [2022-10-17 11:08:17,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:08:17,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074610989] [2022-10-17 11:08:17,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:08:17,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:08:17,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:08:17,341 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 11:08:17,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:08:17,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074610989] [2022-10-17 11:08:17,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074610989] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:08:17,343 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 11:08:17,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-10-17 11:08:17,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405025275] [2022-10-17 11:08:17,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:08:17,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-17 11:08:17,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:08:17,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-17 11:08:17,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-10-17 11:08:17,352 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 119 [2022-10-17 11:08:17,353 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 104 transitions, 254 flow. Second operand has 7 states, 7 states have (on average 88.0) internal successors, (616), 7 states have internal predecessors, (616), 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 11:08:17,354 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 11:08:17,354 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 119 [2022-10-17 11:08:17,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 11:08:17,553 INFO L130 PetriNetUnfolder]: 81/330 cut-off events. [2022-10-17 11:08:17,553 INFO L131 PetriNetUnfolder]: For 48/51 co-relation queries the response was YES. [2022-10-17 11:08:17,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 574 conditions, 330 events. 81/330 cut-off events. For 48/51 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1276 event pairs, 48 based on Foata normal form. 3/308 useless extension candidates. Maximal degree in co-relation 566. Up to 144 conditions per place. [2022-10-17 11:08:17,557 INFO L137 encePairwiseOnDemand]: 110/119 looper letters, 25 selfloop transitions, 6 changer transitions 11/116 dead transitions. [2022-10-17 11:08:17,557 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 116 transitions, 365 flow [2022-10-17 11:08:17,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-17 11:08:17,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-10-17 11:08:17,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 722 transitions. [2022-10-17 11:08:17,560 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7584033613445378 [2022-10-17 11:08:17,560 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 722 transitions. [2022-10-17 11:08:17,560 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 722 transitions. [2022-10-17 11:08:17,561 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 11:08:17,561 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 722 transitions. [2022-10-17 11:08:17,583 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 90.25) internal successors, (722), 8 states have internal predecessors, (722), 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 11:08:17,586 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 119.0) internal successors, (1071), 9 states have internal predecessors, (1071), 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 11:08:17,587 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 119.0) internal successors, (1071), 9 states have internal predecessors, (1071), 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 11:08:17,587 INFO L175 Difference]: Start difference. First operand has 112 places, 104 transitions, 254 flow. Second operand 8 states and 722 transitions. [2022-10-17 11:08:17,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 116 transitions, 365 flow [2022-10-17 11:08:17,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 116 transitions, 355 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-10-17 11:08:17,592 INFO L231 Difference]: Finished difference. Result has 117 places, 102 transitions, 248 flow [2022-10-17 11:08:17,592 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=119, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=248, PETRI_PLACES=117, PETRI_TRANSITIONS=102} [2022-10-17 11:08:17,593 INFO L287 CegarLoopForPetriNet]: 106 programPoint places, 11 predicate places. [2022-10-17 11:08:17,593 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 102 transitions, 248 flow [2022-10-17 11:08:17,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 88.0) internal successors, (616), 7 states have internal predecessors, (616), 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 11:08:17,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 11:08:17,594 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:08:17,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-17 11:08:17,595 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 11:08:17,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:08:17,595 INFO L85 PathProgramCache]: Analyzing trace with hash -903377404, now seen corresponding path program 1 times [2022-10-17 11:08:17,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:08:17,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475783560] [2022-10-17 11:08:17,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:08:17,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:08:17,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:08:17,768 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 11:08:17,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:08:17,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475783560] [2022-10-17 11:08:17,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475783560] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 11:08:17,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434120052] [2022-10-17 11:08:17,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:08:17,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:08:17,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dca9e5e-c810-495b-a053-abda86c10301/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 11:08:17,772 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dca9e5e-c810-495b-a053-abda86c10301/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 11:08:17,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dca9e5e-c810-495b-a053-abda86c10301/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 11:08:17,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:08:17,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 6 conjunts are in the unsatisfiable core [2022-10-17 11:08:17,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 11:08:18,038 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 11:08:18,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 11:08:18,298 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 11:08:18,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434120052] provided 1 perfect and 1 imperfect interpolant sequences [2022-10-17 11:08:18,298 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-10-17 11:08:18,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 7] total 14 [2022-10-17 11:08:18,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116349891] [2022-10-17 11:08:18,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:08:18,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-17 11:08:18,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:08:18,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-17 11:08:18,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-10-17 11:08:18,301 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 119 [2022-10-17 11:08:18,302 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 102 transitions, 248 flow. Second operand has 7 states, 7 states have (on average 88.28571428571429) internal successors, (618), 7 states have internal predecessors, (618), 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 11:08:18,302 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 11:08:18,303 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 119 [2022-10-17 11:08:18,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 11:08:18,464 INFO L130 PetriNetUnfolder]: 70/263 cut-off events. [2022-10-17 11:08:18,465 INFO L131 PetriNetUnfolder]: For 56/56 co-relation queries the response was YES. [2022-10-17 11:08:18,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 499 conditions, 263 events. 70/263 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 855 event pairs, 17 based on Foata normal form. 9/265 useless extension candidates. Maximal degree in co-relation 489. Up to 79 conditions per place. [2022-10-17 11:08:18,468 INFO L137 encePairwiseOnDemand]: 111/119 looper letters, 27 selfloop transitions, 7 changer transitions 0/108 dead transitions. [2022-10-17 11:08:18,468 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 108 transitions, 333 flow [2022-10-17 11:08:18,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-17 11:08:18,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-10-17 11:08:18,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 629 transitions. [2022-10-17 11:08:18,471 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7551020408163265 [2022-10-17 11:08:18,471 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 629 transitions. [2022-10-17 11:08:18,471 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 629 transitions. [2022-10-17 11:08:18,472 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 11:08:18,472 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 629 transitions. [2022-10-17 11:08:18,474 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 89.85714285714286) internal successors, (629), 7 states have internal predecessors, (629), 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 11:08:18,476 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 119.0) internal successors, (952), 8 states have internal predecessors, (952), 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 11:08:18,476 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 119.0) internal successors, (952), 8 states have internal predecessors, (952), 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 11:08:18,477 INFO L175 Difference]: Start difference. First operand has 117 places, 102 transitions, 248 flow. Second operand 7 states and 629 transitions. [2022-10-17 11:08:18,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 108 transitions, 333 flow [2022-10-17 11:08:18,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 108 transitions, 307 flow, removed 7 selfloop flow, removed 9 redundant places. [2022-10-17 11:08:18,482 INFO L231 Difference]: Finished difference. Result has 113 places, 104 transitions, 259 flow [2022-10-17 11:08:18,483 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=119, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=259, PETRI_PLACES=113, PETRI_TRANSITIONS=104} [2022-10-17 11:08:18,485 INFO L287 CegarLoopForPetriNet]: 106 programPoint places, 7 predicate places. [2022-10-17 11:08:18,485 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 104 transitions, 259 flow [2022-10-17 11:08:18,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 88.28571428571429) internal successors, (618), 7 states have internal predecessors, (618), 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 11:08:18,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 11:08:18,486 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:08:18,527 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dca9e5e-c810-495b-a053-abda86c10301/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-17 11:08:18,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dca9e5e-c810-495b-a053-abda86c10301/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:08:18,703 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 11:08:18,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:08:18,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1350927880, now seen corresponding path program 1 times [2022-10-17 11:08:18,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:08:18,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766989877] [2022-10-17 11:08:18,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:08:18,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:08:18,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:08:18,857 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 11:08:18,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:08:18,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766989877] [2022-10-17 11:08:18,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766989877] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 11:08:18,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083172132] [2022-10-17 11:08:18,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:08:18,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:08:18,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dca9e5e-c810-495b-a053-abda86c10301/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 11:08:18,859 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dca9e5e-c810-495b-a053-abda86c10301/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 11:08:18,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dca9e5e-c810-495b-a053-abda86c10301/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-17 11:08:18,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:08:18,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 6 conjunts are in the unsatisfiable core [2022-10-17 11:08:18,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 11:08:19,065 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 11:08:19,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 11:08:19,221 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 11:08:19,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083172132] provided 1 perfect and 1 imperfect interpolant sequences [2022-10-17 11:08:19,222 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-10-17 11:08:19,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 7] total 14 [2022-10-17 11:08:19,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504573126] [2022-10-17 11:08:19,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:08:19,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-17 11:08:19,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:08:19,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-17 11:08:19,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-10-17 11:08:19,231 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 119 [2022-10-17 11:08:19,232 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 104 transitions, 259 flow. Second operand has 7 states, 7 states have (on average 88.28571428571429) internal successors, (618), 7 states have internal predecessors, (618), 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 11:08:19,232 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 11:08:19,232 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 119 [2022-10-17 11:08:19,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 11:08:19,349 INFO L130 PetriNetUnfolder]: 59/261 cut-off events. [2022-10-17 11:08:19,349 INFO L131 PetriNetUnfolder]: For 76/90 co-relation queries the response was YES. [2022-10-17 11:08:19,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 498 conditions, 261 events. 59/261 cut-off events. For 76/90 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 792 event pairs, 20 based on Foata normal form. 14/262 useless extension candidates. Maximal degree in co-relation 489. Up to 67 conditions per place. [2022-10-17 11:08:19,352 INFO L137 encePairwiseOnDemand]: 111/119 looper letters, 29 selfloop transitions, 7 changer transitions 0/110 dead transitions. [2022-10-17 11:08:19,352 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 110 transitions, 352 flow [2022-10-17 11:08:19,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-17 11:08:19,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-10-17 11:08:19,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 629 transitions. [2022-10-17 11:08:19,355 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7551020408163265 [2022-10-17 11:08:19,355 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 629 transitions. [2022-10-17 11:08:19,356 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 629 transitions. [2022-10-17 11:08:19,356 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 11:08:19,356 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 629 transitions. [2022-10-17 11:08:19,358 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 89.85714285714286) internal successors, (629), 7 states have internal predecessors, (629), 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 11:08:19,360 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 119.0) internal successors, (952), 8 states have internal predecessors, (952), 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 11:08:19,361 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 119.0) internal successors, (952), 8 states have internal predecessors, (952), 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 11:08:19,361 INFO L175 Difference]: Start difference. First operand has 113 places, 104 transitions, 259 flow. Second operand 7 states and 629 transitions. [2022-10-17 11:08:19,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 110 transitions, 352 flow [2022-10-17 11:08:19,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 110 transitions, 343 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-10-17 11:08:19,366 INFO L231 Difference]: Finished difference. Result has 117 places, 105 transitions, 278 flow [2022-10-17 11:08:19,366 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=119, PETRI_DIFFERENCE_MINUEND_FLOW=251, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=278, PETRI_PLACES=117, PETRI_TRANSITIONS=105} [2022-10-17 11:08:19,367 INFO L287 CegarLoopForPetriNet]: 106 programPoint places, 11 predicate places. [2022-10-17 11:08:19,367 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 105 transitions, 278 flow [2022-10-17 11:08:19,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 88.28571428571429) internal successors, (618), 7 states have internal predecessors, (618), 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 11:08:19,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 11:08:19,368 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, 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 11:08:19,405 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dca9e5e-c810-495b-a053-abda86c10301/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-10-17 11:08:19,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dca9e5e-c810-495b-a053-abda86c10301/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:08:19,584 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 11:08:19,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:08:19,585 INFO L85 PathProgramCache]: Analyzing trace with hash 6376246, now seen corresponding path program 1 times [2022-10-17 11:08:19,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:08:19,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723484514] [2022-10-17 11:08:19,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:08:19,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:08:19,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:08:20,531 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 11:08:20,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:08:20,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723484514] [2022-10-17 11:08:20,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723484514] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 11:08:20,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539380876] [2022-10-17 11:08:20,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:08:20,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:08:20,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dca9e5e-c810-495b-a053-abda86c10301/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 11:08:20,535 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dca9e5e-c810-495b-a053-abda86c10301/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 11:08:20,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dca9e5e-c810-495b-a053-abda86c10301/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-17 11:08:20,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:08:20,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 49 conjunts are in the unsatisfiable core [2022-10-17 11:08:20,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 11:08:20,997 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 11:08:20,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 11:08:21,201 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-17 11:08:21,202 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 16 [2022-10-17 11:08:21,225 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-10-17 11:08:21,225 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-10-17 11:08:21,360 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 11:08:21,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539380876] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 11:08:21,361 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 11:08:21,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 10] total 23 [2022-10-17 11:08:21,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974309754] [2022-10-17 11:08:21,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 11:08:21,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-10-17 11:08:21,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:08:21,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-10-17 11:08:21,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2022-10-17 11:08:21,366 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 119 [2022-10-17 11:08:21,368 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 105 transitions, 278 flow. Second operand has 23 states, 23 states have (on average 63.47826086956522) internal successors, (1460), 23 states have internal predecessors, (1460), 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 11:08:21,368 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 11:08:21,368 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 119 [2022-10-17 11:08:21,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 11:08:23,246 INFO L130 PetriNetUnfolder]: 991/2136 cut-off events. [2022-10-17 11:08:23,250 INFO L131 PetriNetUnfolder]: For 1305/1305 co-relation queries the response was YES. [2022-10-17 11:08:23,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5099 conditions, 2136 events. 991/2136 cut-off events. For 1305/1305 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 14239 event pairs, 105 based on Foata normal form. 2/2130 useless extension candidates. Maximal degree in co-relation 5088. Up to 460 conditions per place. [2022-10-17 11:08:23,271 INFO L137 encePairwiseOnDemand]: 99/119 looper letters, 222 selfloop transitions, 80 changer transitions 8/362 dead transitions. [2022-10-17 11:08:23,272 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 362 transitions, 1743 flow [2022-10-17 11:08:23,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-10-17 11:08:23,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2022-10-17 11:08:23,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 2890 transitions. [2022-10-17 11:08:23,283 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.5647840531561462 [2022-10-17 11:08:23,283 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 2890 transitions. [2022-10-17 11:08:23,310 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 2890 transitions. [2022-10-17 11:08:23,312 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 11:08:23,312 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 2890 transitions. [2022-10-17 11:08:23,322 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 67.20930232558139) internal successors, (2890), 43 states have internal predecessors, (2890), 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 11:08:23,336 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 119.0) internal successors, (5236), 44 states have internal predecessors, (5236), 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 11:08:23,340 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 119.0) internal successors, (5236), 44 states have internal predecessors, (5236), 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 11:08:23,340 INFO L175 Difference]: Start difference. First operand has 117 places, 105 transitions, 278 flow. Second operand 43 states and 2890 transitions. [2022-10-17 11:08:23,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 362 transitions, 1743 flow [2022-10-17 11:08:23,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 362 transitions, 1707 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-10-17 11:08:23,357 INFO L231 Difference]: Finished difference. Result has 171 places, 191 transitions, 877 flow [2022-10-17 11:08:23,358 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=119, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=877, PETRI_PLACES=171, PETRI_TRANSITIONS=191} [2022-10-17 11:08:23,359 INFO L287 CegarLoopForPetriNet]: 106 programPoint places, 65 predicate places. [2022-10-17 11:08:23,360 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 191 transitions, 877 flow [2022-10-17 11:08:23,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 63.47826086956522) internal successors, (1460), 23 states have internal predecessors, (1460), 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 11:08:23,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 11:08:23,361 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, 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 11:08:23,393 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dca9e5e-c810-495b-a053-abda86c10301/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-17 11:08:23,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dca9e5e-c810-495b-a053-abda86c10301/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:08:23,587 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 11:08:23,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:08:23,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1477858140, now seen corresponding path program 2 times [2022-10-17 11:08:23,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:08:23,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541550935] [2022-10-17 11:08:23,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:08:23,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:08:23,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:08:24,967 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 11:08:24,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:08:24,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541550935] [2022-10-17 11:08:24,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541550935] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 11:08:24,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455748643] [2022-10-17 11:08:24,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-17 11:08:24,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:08:24,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dca9e5e-c810-495b-a053-abda86c10301/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 11:08:24,971 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dca9e5e-c810-495b-a053-abda86c10301/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 11:08:24,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dca9e5e-c810-495b-a053-abda86c10301/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-17 11:08:25,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-17 11:08:25,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 11:08:25,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 63 conjunts are in the unsatisfiable core [2022-10-17 11:08:25,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 11:08:25,121 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-17 11:08:25,202 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-10-17 11:08:25,205 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-10-17 11:08:25,422 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2022-10-17 11:08:25,579 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 11:08:25,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 11:08:25,745 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_138 (Array Int Int))) (<= c_~counter~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_138) c_~A~0.base) c_~A~0.offset))) (forall ((v_ArrVal_138 (Array Int Int))) (<= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_138) c_~A~0.base) c_~A~0.offset) c_~counter~0))) is different from false [2022-10-17 11:08:25,788 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_138 (Array Int Int))) (<= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_138) c_~A~0.base) c_~A~0.offset) |c_thread1Thread1of1ForFork0_~tmp~0#1|)) (forall ((v_ArrVal_138 (Array Int Int))) (<= |c_thread1Thread1of1ForFork0_~tmp~0#1| (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_138) c_~A~0.base) c_~A~0.offset)))) is different from false [2022-10-17 11:08:25,811 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-17 11:08:25,812 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 32 [2022-10-17 11:08:25,819 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-10-17 11:08:25,849 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 11:08:25,855 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-10-17 11:08:25,855 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-10-17 11:08:26,590 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 11:08:26,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455748643] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 11:08:26,591 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 11:08:26,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 32 [2022-10-17 11:08:26,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275179016] [2022-10-17 11:08:26,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 11:08:26,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-10-17 11:08:26,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:08:26,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-10-17 11:08:26,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=780, Unknown=2, NotChecked=114, Total=992 [2022-10-17 11:08:26,597 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 119 [2022-10-17 11:08:26,599 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 191 transitions, 877 flow. Second operand has 32 states, 32 states have (on average 55.0) internal successors, (1760), 32 states have internal predecessors, (1760), 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 11:08:26,599 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 11:08:26,599 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 119 [2022-10-17 11:08:26,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 11:08:29,051 INFO L130 PetriNetUnfolder]: 1860/3936 cut-off events. [2022-10-17 11:08:29,051 INFO L131 PetriNetUnfolder]: For 8490/8505 co-relation queries the response was YES. [2022-10-17 11:08:29,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12058 conditions, 3936 events. 1860/3936 cut-off events. For 8490/8505 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 30719 event pairs, 149 based on Foata normal form. 14/3939 useless extension candidates. Maximal degree in co-relation 12030. Up to 1352 conditions per place. [2022-10-17 11:08:29,153 INFO L137 encePairwiseOnDemand]: 96/119 looper letters, 269 selfloop transitions, 114 changer transitions 8/438 dead transitions. [2022-10-17 11:08:29,153 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 438 transitions, 3000 flow [2022-10-17 11:08:29,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-10-17 11:08:29,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2022-10-17 11:08:29,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2248 transitions. [2022-10-17 11:08:29,163 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.497125165855816 [2022-10-17 11:08:29,164 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2248 transitions. [2022-10-17 11:08:29,164 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2248 transitions. [2022-10-17 11:08:29,166 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 11:08:29,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2248 transitions. [2022-10-17 11:08:29,174 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 59.1578947368421) internal successors, (2248), 38 states have internal predecessors, (2248), 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 11:08:29,185 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 119.0) internal successors, (4641), 39 states have internal predecessors, (4641), 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 11:08:29,188 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 119.0) internal successors, (4641), 39 states have internal predecessors, (4641), 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 11:08:29,188 INFO L175 Difference]: Start difference. First operand has 171 places, 191 transitions, 877 flow. Second operand 38 states and 2248 transitions. [2022-10-17 11:08:29,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 438 transitions, 3000 flow [2022-10-17 11:08:29,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 438 transitions, 2823 flow, removed 78 selfloop flow, removed 11 redundant places. [2022-10-17 11:08:29,249 INFO L231 Difference]: Finished difference. Result has 213 places, 264 transitions, 1778 flow [2022-10-17 11:08:29,250 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=119, PETRI_DIFFERENCE_MINUEND_FLOW=793, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=1778, PETRI_PLACES=213, PETRI_TRANSITIONS=264} [2022-10-17 11:08:29,250 INFO L287 CegarLoopForPetriNet]: 106 programPoint places, 107 predicate places. [2022-10-17 11:08:29,251 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 264 transitions, 1778 flow [2022-10-17 11:08:29,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 55.0) internal successors, (1760), 32 states have internal predecessors, (1760), 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 11:08:29,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 11:08:29,252 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, 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 11:08:29,285 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dca9e5e-c810-495b-a053-abda86c10301/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-10-17 11:08:29,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dca9e5e-c810-495b-a053-abda86c10301/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:08:29,468 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 11:08:29,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:08:29,469 INFO L85 PathProgramCache]: Analyzing trace with hash 683976520, now seen corresponding path program 3 times [2022-10-17 11:08:29,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:08:29,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281013359] [2022-10-17 11:08:29,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:08:29,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:08:29,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-10-17 11:08:29,544 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-10-17 11:08:29,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-10-17 11:08:29,625 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-10-17 11:08:29,625 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-10-17 11:08:29,626 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2022-10-17 11:08:29,628 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2022-10-17 11:08:29,629 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2022-10-17 11:08:29,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-10-17 11:08:29,630 INFO L444 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1, 1] [2022-10-17 11:08:29,636 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-10-17 11:08:29,636 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-10-17 11:08:29,775 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.10 11:08:29 BasicIcfg [2022-10-17 11:08:29,775 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-10-17 11:08:29,776 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-10-17 11:08:29,776 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-10-17 11:08:29,776 INFO L275 PluginConnector]: Witness Printer initialized [2022-10-17 11:08:29,777 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 11:08:14" (3/4) ... [2022-10-17 11:08:29,788 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-10-17 11:08:29,896 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dca9e5e-c810-495b-a053-abda86c10301/bin/uautomizer-J5u9QxTXDZ/witness.graphml [2022-10-17 11:08:29,896 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-10-17 11:08:29,897 INFO L158 Benchmark]: Toolchain (without parser) took 16173.84ms. Allocated memory was 86.0MB in the beginning and 276.8MB in the end (delta: 190.8MB). Free memory was 64.0MB in the beginning and 137.7MB in the end (delta: -73.7MB). Peak memory consumption was 117.8MB. Max. memory is 16.1GB. [2022-10-17 11:08:29,897 INFO L158 Benchmark]: CDTParser took 0.27ms. Allocated memory is still 86.0MB. Free memory is still 61.5MB. There was no memory consumed. Max. memory is 16.1GB. [2022-10-17 11:08:29,898 INFO L158 Benchmark]: CACSL2BoogieTranslator took 340.67ms. Allocated memory is still 86.0MB. Free memory was 63.7MB in the beginning and 62.0MB in the end (delta: 1.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-10-17 11:08:29,898 INFO L158 Benchmark]: Boogie Procedure Inliner took 61.60ms. Allocated memory is still 86.0MB. Free memory was 62.0MB in the beginning and 60.0MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-10-17 11:08:29,899 INFO L158 Benchmark]: Boogie Preprocessor took 62.04ms. Allocated memory is still 86.0MB. Free memory was 60.0MB in the beginning and 58.6MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-10-17 11:08:29,899 INFO L158 Benchmark]: RCFGBuilder took 761.57ms. Allocated memory was 86.0MB in the beginning and 123.7MB in the end (delta: 37.7MB). Free memory was 58.4MB in the beginning and 90.9MB in the end (delta: -32.5MB). Peak memory consumption was 17.0MB. Max. memory is 16.1GB. [2022-10-17 11:08:29,900 INFO L158 Benchmark]: TraceAbstraction took 14821.06ms. Allocated memory was 123.7MB in the beginning and 276.8MB in the end (delta: 153.1MB). Free memory was 90.4MB in the beginning and 155.5MB in the end (delta: -65.1MB). Peak memory consumption was 91.8MB. Max. memory is 16.1GB. [2022-10-17 11:08:29,900 INFO L158 Benchmark]: Witness Printer took 120.53ms. Allocated memory is still 276.8MB. Free memory was 155.5MB in the beginning and 137.7MB in the end (delta: 17.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2022-10-17 11:08:29,903 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27ms. Allocated memory is still 86.0MB. Free memory is still 61.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 340.67ms. Allocated memory is still 86.0MB. Free memory was 63.7MB in the beginning and 62.0MB in the end (delta: 1.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 61.60ms. Allocated memory is still 86.0MB. Free memory was 62.0MB in the beginning and 60.0MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 62.04ms. Allocated memory is still 86.0MB. Free memory was 60.0MB in the beginning and 58.6MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 761.57ms. Allocated memory was 86.0MB in the beginning and 123.7MB in the end (delta: 37.7MB). Free memory was 58.4MB in the beginning and 90.9MB in the end (delta: -32.5MB). Peak memory consumption was 17.0MB. Max. memory is 16.1GB. * TraceAbstraction took 14821.06ms. Allocated memory was 123.7MB in the beginning and 276.8MB in the end (delta: 153.1MB). Free memory was 90.4MB in the beginning and 155.5MB in the end (delta: -65.1MB). Peak memory consumption was 91.8MB. Max. memory is 16.1GB. * Witness Printer took 120.53ms. Allocated memory is still 276.8MB. Free memory was 155.5MB in the beginning and 137.7MB in the end (delta: 17.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 87]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L41] 0 int* A; VAL [A={0:0}] [L42] 0 int counter, N; VAL [A={0:0}, counter=0, N=0] [L75] 0 pthread_t t1, t2; VAL [A={0:0}, counter=0, N=0, t1={5:0}, t2={3:0}] [L77] 0 N = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=1, A={0:0}, counter=0, N=1, t1={5:0}, t2={3:0}] [L78] CALL, EXPR 0 create_fresh_int_array(N) [L93] CALL 0 assume_abort_if_not(size >= 0) [L38] COND FALSE 0 !(!cond) VAL [\old(cond)=1, A={0:0}, cond=1, counter=0, N=1] [L93] RET 0 assume_abort_if_not(size >= 0) [L94] CALL 0 assume_abort_if_not(size <= (((size_t) 4294967295) / sizeof(int))) [L38] COND FALSE 0 !(!cond) VAL [\old(cond)=1, A={0:0}, cond=1, counter=0, N=1] [L94] RET 0 assume_abort_if_not(size <= (((size_t) 4294967295) / sizeof(int))) [L96] 0 int* arr = (int*)malloc(sizeof(int) * (size_t)size); VAL [\old(size)=1, A={0:0}, arr={-3:0}, counter=0, malloc(sizeof(int) * (size_t)size)={-3:0}, N=1, size=1] [L97] 0 int i = 0; VAL [\old(size)=1, A={0:0}, arr={-3:0}, counter=0, i=0, N=1, size=1] [L97] COND TRUE 0 i < size VAL [\old(size)=1, A={0:0}, arr={-3:0}, counter=0, i=0, N=1, size=1] [L98] 0 arr[i] = __VERIFIER_nondet_int() VAL [\old(size)=1, __VERIFIER_nondet_int()=-6, A={0:0}, arr={-3:0}, counter=0, i=0, N=1, size=1] [L97] 0 i++ VAL [\old(size)=1, A={0:0}, arr={-3:0}, counter=0, i=1, N=1, size=1] [L97] COND FALSE 0 !(i < size) VAL [\old(size)=1, A={0:0}, arr={-3:0}, counter=0, i=1, N=1, size=1] [L100] 0 return arr; VAL [\old(size)=1, \result={-3:0}, A={0:0}, arr={-3:0}, counter=0, i=1, N=1, size=1] [L78] RET, EXPR 0 create_fresh_int_array(N) [L78] 0 A = create_fresh_int_array(N) VAL [A={-3:0}, counter=0, create_fresh_int_array(N)={-3:0}, N=1, t1={5:0}, t2={3:0}] [L81] FCALL, FORK 0 pthread_create(&t1, 0, thread1, 0) VAL [A={-3:0}, counter=0, N=1, pthread_create(&t1, 0, thread1, 0)=-2, t1={5:0}, t2={3:0}] [L82] FCALL, FORK 0 pthread_create(&t2, 0, thread2, 0) VAL [A={-3:0}, counter=0, N=1, pthread_create(&t2, 0, thread2, 0)=-1, t1={5:0}, t2={3:0}] [L83] 0 \read(t1) VAL [\read(t1)=-2, A={-3:0}, counter=0, N=1, t1={5:0}, t2={3:0}] [L49] 1 int i=0; VAL [A={-3:0}, counter=0, i=0, N=1] [L49] COND TRUE 1 i= 0 || a >= -2147483648 - b) [L38] COND FALSE 1 !(!cond) [L110] RET 1 assume_abort_if_not(b >= 0 || a >= -2147483648 - b) [L111] CALL 1 assume_abort_if_not(b <= 0 || a <= 2147483647 - b) [L38] COND FALSE 1 !(!cond) [L111] RET 1 assume_abort_if_not(b <= 0 || a <= 2147483647 - b) [L112] 1 return a + b; [L51] RET, EXPR 1 plus(counter, A[i]) [L51] 1 int tmp = plus(counter, A[i]); [L62] 2 int i=0; VAL [A={-3:0}, counter=0, i=0, N=1] [L62] COND TRUE 2 i= b - 2147483648) [L38] COND FALSE 2 !(!cond) [L104] RET 2 assume_abort_if_not(b <= 0 || a >= b - 2147483648) [L105] CALL 2 assume_abort_if_not(b >= 0 || a <= b + 2147483647) [L38] COND FALSE 2 !(!cond) [L105] RET 2 assume_abort_if_not(b >= 0 || a <= b + 2147483647) [L106] 2 return a - b; [L64] RET, EXPR 2 minus(counter, A[i]) [L64] 2 int tmp = minus(counter, A[i]); [L67] 2 counter = tmp VAL [A={-3:0}, counter=6, i=0, N=1, tmp=6] [L62] 2 i++ VAL [A={-3:0}, counter=6, i=1, N=1, tmp=6] [L62] COND FALSE 2 !(i