./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/stack_longest-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ad4dd19-97e1-41ee-bee9-e2f52fe5ba8d/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ad4dd19-97e1-41ee-bee9-e2f52fe5ba8d/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ad4dd19-97e1-41ee-bee9-e2f52fe5ba8d/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ad4dd19-97e1-41ee-bee9-e2f52fe5ba8d/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/stack_longest-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ad4dd19-97e1-41ee-bee9-e2f52fe5ba8d/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ad4dd19-97e1-41ee-bee9-e2f52fe5ba8d/bin/uautomizer-ug76WZFUDN --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 529fe0895c01c52d9b18b51c32204a307faf547c0c07b22bc1a431308affcf90 --- 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-6b4ec56 [2022-11-20 10:48:59,323 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 10:48:59,325 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 10:48:59,364 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 10:48:59,365 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 10:48:59,368 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 10:48:59,371 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 10:48:59,374 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 10:48:59,376 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 10:48:59,381 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 10:48:59,382 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 10:48:59,384 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 10:48:59,385 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 10:48:59,387 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 10:48:59,389 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 10:48:59,391 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 10:48:59,392 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 10:48:59,393 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 10:48:59,395 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 10:48:59,401 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 10:48:59,402 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 10:48:59,404 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 10:48:59,406 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 10:48:59,407 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 10:48:59,416 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 10:48:59,417 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 10:48:59,417 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 10:48:59,418 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 10:48:59,420 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 10:48:59,421 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 10:48:59,421 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 10:48:59,422 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 10:48:59,424 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 10:48:59,425 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 10:48:59,426 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 10:48:59,426 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 10:48:59,427 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 10:48:59,427 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 10:48:59,427 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 10:48:59,429 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 10:48:59,430 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 10:48:59,430 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ad4dd19-97e1-41ee-bee9-e2f52fe5ba8d/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 10:48:59,469 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 10:48:59,469 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 10:48:59,470 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 10:48:59,470 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 10:48:59,472 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 10:48:59,472 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 10:48:59,473 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 10:48:59,473 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 10:48:59,473 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 10:48:59,473 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 10:48:59,475 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 10:48:59,475 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 10:48:59,475 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 10:48:59,475 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 10:48:59,476 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 10:48:59,476 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 10:48:59,476 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 10:48:59,477 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 10:48:59,477 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 10:48:59,477 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 10:48:59,477 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 10:48:59,478 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 10:48:59,478 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 10:48:59,478 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 10:48:59,479 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:48:59,479 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 10:48:59,479 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 10:48:59,479 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 10:48:59,480 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 10:48:59,481 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 10:48:59,481 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 10:48:59,481 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 10:48:59,482 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 10:48:59,482 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_9ad4dd19-97e1-41ee-bee9-e2f52fe5ba8d/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ad4dd19-97e1-41ee-bee9-e2f52fe5ba8d/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 529fe0895c01c52d9b18b51c32204a307faf547c0c07b22bc1a431308affcf90 [2022-11-20 10:48:59,744 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 10:48:59,769 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 10:48:59,772 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 10:48:59,773 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 10:48:59,774 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 10:48:59,775 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ad4dd19-97e1-41ee-bee9-e2f52fe5ba8d/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/pthread/stack_longest-1.i [2022-11-20 10:49:02,828 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 10:49:03,257 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 10:49:03,258 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ad4dd19-97e1-41ee-bee9-e2f52fe5ba8d/sv-benchmarks/c/pthread/stack_longest-1.i [2022-11-20 10:49:03,271 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ad4dd19-97e1-41ee-bee9-e2f52fe5ba8d/bin/uautomizer-ug76WZFUDN/data/3d909d1cb/83623b144b0e42498307f139731ad154/FLAG42896e859 [2022-11-20 10:49:03,422 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ad4dd19-97e1-41ee-bee9-e2f52fe5ba8d/bin/uautomizer-ug76WZFUDN/data/3d909d1cb/83623b144b0e42498307f139731ad154 [2022-11-20 10:49:03,424 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 10:49:03,426 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 10:49:03,427 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 10:49:03,427 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 10:49:03,431 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 10:49:03,432 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:49:03" (1/1) ... [2022-11-20 10:49:03,433 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a4e474c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:49:03, skipping insertion in model container [2022-11-20 10:49:03,433 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:49:03" (1/1) ... [2022-11-20 10:49:03,443 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 10:49:03,510 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 10:49:04,041 WARN L237 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_9ad4dd19-97e1-41ee-bee9-e2f52fe5ba8d/sv-benchmarks/c/pthread/stack_longest-1.i[41530,41543] [2022-11-20 10:49:04,093 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:49:04,110 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 10:49:04,176 WARN L237 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_9ad4dd19-97e1-41ee-bee9-e2f52fe5ba8d/sv-benchmarks/c/pthread/stack_longest-1.i[41530,41543] [2022-11-20 10:49:04,200 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:49:04,259 INFO L208 MainTranslator]: Completed translation [2022-11-20 10:49:04,260 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:49:04 WrapperNode [2022-11-20 10:49:04,260 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 10:49:04,261 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 10:49:04,261 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 10:49:04,261 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 10:49:04,268 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:49:04" (1/1) ... [2022-11-20 10:49:04,292 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:49:04" (1/1) ... [2022-11-20 10:49:04,330 INFO L138 Inliner]: procedures = 277, calls = 39, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 155 [2022-11-20 10:49:04,331 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 10:49:04,331 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 10:49:04,331 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 10:49:04,332 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 10:49:04,342 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:49:04" (1/1) ... [2022-11-20 10:49:04,342 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:49:04" (1/1) ... [2022-11-20 10:49:04,346 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:49:04" (1/1) ... [2022-11-20 10:49:04,347 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:49:04" (1/1) ... [2022-11-20 10:49:04,354 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:49:04" (1/1) ... [2022-11-20 10:49:04,367 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:49:04" (1/1) ... [2022-11-20 10:49:04,369 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:49:04" (1/1) ... [2022-11-20 10:49:04,371 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:49:04" (1/1) ... [2022-11-20 10:49:04,374 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 10:49:04,386 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 10:49:04,388 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 10:49:04,388 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 10:49:04,389 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:49:04" (1/1) ... [2022-11-20 10:49:04,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:49:04,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ad4dd19-97e1-41ee-bee9-e2f52fe5ba8d/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:49:04,429 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ad4dd19-97e1-41ee-bee9-e2f52fe5ba8d/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 10:49:04,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ad4dd19-97e1-41ee-bee9-e2f52fe5ba8d/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 10:49:04,471 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-11-20 10:49:04,471 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-11-20 10:49:04,471 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-11-20 10:49:04,471 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-11-20 10:49:04,471 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 10:49:04,472 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 10:49:04,472 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 10:49:04,472 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 10:49:04,474 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-20 10:49:04,474 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 10:49:04,474 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 10:49:04,474 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 10:49:04,475 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 10:49:04,476 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-20 10:49:04,616 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 10:49:04,619 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 10:49:05,048 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 10:49:05,057 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 10:49:05,057 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-20 10:49:05,060 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:49:05 BoogieIcfgContainer [2022-11-20 10:49:05,060 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 10:49:05,062 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 10:49:05,062 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 10:49:05,066 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 10:49:05,066 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 10:49:03" (1/3) ... [2022-11-20 10:49:05,067 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4af9c5c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:49:05, skipping insertion in model container [2022-11-20 10:49:05,067 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:49:04" (2/3) ... [2022-11-20 10:49:05,067 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4af9c5c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:49:05, skipping insertion in model container [2022-11-20 10:49:05,068 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:49:05" (3/3) ... [2022-11-20 10:49:05,069 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longest-1.i [2022-11-20 10:49:05,078 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-20 10:49:05,089 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 10:49:05,089 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-20 10:49:05,089 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-20 10:49:05,186 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-20 10:49:05,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 176 places, 179 transitions, 374 flow [2022-11-20 10:49:05,310 INFO L130 PetriNetUnfolder]: 10/177 cut-off events. [2022-11-20 10:49:05,310 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-20 10:49:05,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 186 conditions, 177 events. 10/177 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 438 event pairs, 0 based on Foata normal form. 0/165 useless extension candidates. Maximal degree in co-relation 135. Up to 3 conditions per place. [2022-11-20 10:49:05,325 INFO L82 GeneralOperation]: Start removeDead. Operand has 176 places, 179 transitions, 374 flow [2022-11-20 10:49:05,337 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 164 places, 167 transitions, 343 flow [2022-11-20 10:49:05,366 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 10:49:05,376 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;@404816dc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 10:49:05,377 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-11-20 10:49:05,450 INFO L130 PetriNetUnfolder]: 4/130 cut-off events. [2022-11-20 10:49:05,450 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-20 10:49:05,451 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:49:05,452 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:49:05,452 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-20 10:49:05,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:49:05,461 INFO L85 PathProgramCache]: Analyzing trace with hash 2069721496, now seen corresponding path program 1 times [2022-11-20 10:49:05,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:49:05,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757958651] [2022-11-20 10:49:05,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:49:05,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:49:05,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:49:06,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:49:06,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:49:06,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757958651] [2022-11-20 10:49:06,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757958651] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:49:06,062 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:49:06,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:49:06,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645121171] [2022-11-20 10:49:06,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:49:06,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:49:06,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:49:06,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:49:06,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:49:06,142 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 179 [2022-11-20 10:49:06,150 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 167 transitions, 343 flow. Second operand has 3 states, 3 states have (on average 159.0) internal successors, (477), 3 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:06,150 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:49:06,151 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 179 [2022-11-20 10:49:06,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:49:06,501 INFO L130 PetriNetUnfolder]: 91/890 cut-off events. [2022-11-20 10:49:06,501 INFO L131 PetriNetUnfolder]: For 46/46 co-relation queries the response was YES. [2022-11-20 10:49:06,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1052 conditions, 890 events. 91/890 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 5326 event pairs, 15 based on Foata normal form. 61/879 useless extension candidates. Maximal degree in co-relation 903. Up to 96 conditions per place. [2022-11-20 10:49:06,517 INFO L137 encePairwiseOnDemand]: 170/179 looper letters, 19 selfloop transitions, 3 changer transitions 0/167 dead transitions. [2022-11-20 10:49:06,517 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 167 transitions, 393 flow [2022-11-20 10:49:06,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:49:06,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 10:49:06,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 506 transitions. [2022-11-20 10:49:06,540 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9422718808193669 [2022-11-20 10:49:06,541 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 506 transitions. [2022-11-20 10:49:06,541 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 506 transitions. [2022-11-20 10:49:06,546 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:49:06,549 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 506 transitions. [2022-11-20 10:49:06,555 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 168.66666666666666) internal successors, (506), 3 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:06,565 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 179.0) internal successors, (716), 4 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:06,566 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 179.0) internal successors, (716), 4 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:06,569 INFO L175 Difference]: Start difference. First operand has 164 places, 167 transitions, 343 flow. Second operand 3 states and 506 transitions. [2022-11-20 10:49:06,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 167 transitions, 393 flow [2022-11-20 10:49:06,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 167 transitions, 385 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-20 10:49:06,578 INFO L231 Difference]: Finished difference. Result has 160 places, 160 transitions, 339 flow [2022-11-20 10:49:06,580 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=339, PETRI_PLACES=160, PETRI_TRANSITIONS=160} [2022-11-20 10:49:06,587 INFO L288 CegarLoopForPetriNet]: 164 programPoint places, -4 predicate places. [2022-11-20 10:49:06,587 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 160 transitions, 339 flow [2022-11-20 10:49:06,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 159.0) internal successors, (477), 3 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:06,588 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:49:06,589 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:49:06,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 10:49:06,590 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-20 10:49:06,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:49:06,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1238302065, now seen corresponding path program 1 times [2022-11-20 10:49:06,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:49:06,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883832666] [2022-11-20 10:49:06,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:49:06,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:49:06,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:49:06,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:49:06,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:49:06,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883832666] [2022-11-20 10:49:06,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883832666] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:49:06,871 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:49:06,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:49:06,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295656892] [2022-11-20 10:49:06,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:49:06,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:49:06,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:49:06,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:49:06,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:49:06,879 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 179 [2022-11-20 10:49:06,880 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 160 transitions, 339 flow. Second operand has 3 states, 3 states have (on average 165.33333333333334) internal successors, (496), 3 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:06,882 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:49:06,882 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 179 [2022-11-20 10:49:06,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:49:07,013 INFO L130 PetriNetUnfolder]: 21/419 cut-off events. [2022-11-20 10:49:07,014 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-20 10:49:07,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 465 conditions, 419 events. 21/419 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1381 event pairs, 4 based on Foata normal form. 0/393 useless extension candidates. Maximal degree in co-relation 376. Up to 16 conditions per place. [2022-11-20 10:49:07,018 INFO L137 encePairwiseOnDemand]: 176/179 looper letters, 9 selfloop transitions, 2 changer transitions 0/163 dead transitions. [2022-11-20 10:49:07,019 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 163 transitions, 367 flow [2022-11-20 10:49:07,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:49:07,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 10:49:07,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 504 transitions. [2022-11-20 10:49:07,023 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9385474860335196 [2022-11-20 10:49:07,023 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 504 transitions. [2022-11-20 10:49:07,023 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 504 transitions. [2022-11-20 10:49:07,024 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:49:07,024 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 504 transitions. [2022-11-20 10:49:07,026 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:07,029 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 179.0) internal successors, (716), 4 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:07,030 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 179.0) internal successors, (716), 4 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:07,030 INFO L175 Difference]: Start difference. First operand has 160 places, 160 transitions, 339 flow. Second operand 3 states and 504 transitions. [2022-11-20 10:49:07,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 163 transitions, 367 flow [2022-11-20 10:49:07,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 163 transitions, 365 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 10:49:07,039 INFO L231 Difference]: Finished difference. Result has 162 places, 160 transitions, 344 flow [2022-11-20 10:49:07,040 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=332, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=344, PETRI_PLACES=162, PETRI_TRANSITIONS=160} [2022-11-20 10:49:07,040 INFO L288 CegarLoopForPetriNet]: 164 programPoint places, -2 predicate places. [2022-11-20 10:49:07,041 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 160 transitions, 344 flow [2022-11-20 10:49:07,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 165.33333333333334) internal successors, (496), 3 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:07,042 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:49:07,042 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:49:07,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 10:49:07,044 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-20 10:49:07,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:49:07,045 INFO L85 PathProgramCache]: Analyzing trace with hash 745893730, now seen corresponding path program 1 times [2022-11-20 10:49:07,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:49:07,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507784708] [2022-11-20 10:49:07,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:49:07,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:49:07,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:49:07,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:49:07,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:49:07,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507784708] [2022-11-20 10:49:07,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507784708] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:49:07,205 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:49:07,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 10:49:07,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065551839] [2022-11-20 10:49:07,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:49:07,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 10:49:07,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:49:07,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 10:49:07,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:49:07,208 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 179 [2022-11-20 10:49:07,209 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 160 transitions, 344 flow. Second operand has 4 states, 4 states have (on average 160.75) internal successors, (643), 4 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:07,209 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:49:07,209 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 179 [2022-11-20 10:49:07,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:49:07,340 INFO L130 PetriNetUnfolder]: 41/516 cut-off events. [2022-11-20 10:49:07,341 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-11-20 10:49:07,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 662 conditions, 516 events. 41/516 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2012 event pairs, 13 based on Foata normal form. 0/485 useless extension candidates. Maximal degree in co-relation 403. Up to 37 conditions per place. [2022-11-20 10:49:07,346 INFO L137 encePairwiseOnDemand]: 174/179 looper letters, 16 selfloop transitions, 4 changer transitions 0/168 dead transitions. [2022-11-20 10:49:07,346 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 168 transitions, 405 flow [2022-11-20 10:49:07,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 10:49:07,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-20 10:49:07,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 657 transitions. [2022-11-20 10:49:07,349 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9175977653631285 [2022-11-20 10:49:07,349 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 657 transitions. [2022-11-20 10:49:07,349 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 657 transitions. [2022-11-20 10:49:07,350 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:49:07,350 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 657 transitions. [2022-11-20 10:49:07,351 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 164.25) internal successors, (657), 4 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:07,353 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 179.0) internal successors, (895), 5 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:07,354 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 179.0) internal successors, (895), 5 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:07,354 INFO L175 Difference]: Start difference. First operand has 162 places, 160 transitions, 344 flow. Second operand 4 states and 657 transitions. [2022-11-20 10:49:07,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 168 transitions, 405 flow [2022-11-20 10:49:07,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 168 transitions, 403 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 10:49:07,358 INFO L231 Difference]: Finished difference. Result has 166 places, 163 transitions, 370 flow [2022-11-20 10:49:07,359 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=370, PETRI_PLACES=166, PETRI_TRANSITIONS=163} [2022-11-20 10:49:07,360 INFO L288 CegarLoopForPetriNet]: 164 programPoint places, 2 predicate places. [2022-11-20 10:49:07,360 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 163 transitions, 370 flow [2022-11-20 10:49:07,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 160.75) internal successors, (643), 4 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:07,361 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:49:07,361 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:49:07,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 10:49:07,362 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-20 10:49:07,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:49:07,362 INFO L85 PathProgramCache]: Analyzing trace with hash -450572440, now seen corresponding path program 1 times [2022-11-20 10:49:07,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:49:07,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901288005] [2022-11-20 10:49:07,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:49:07,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:49:07,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:49:07,641 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:49:07,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:49:07,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901288005] [2022-11-20 10:49:07,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901288005] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:49:07,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055809884] [2022-11-20 10:49:07,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:49:07,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:49:07,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ad4dd19-97e1-41ee-bee9-e2f52fe5ba8d/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:49:07,650 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ad4dd19-97e1-41ee-bee9-e2f52fe5ba8d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:49:07,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ad4dd19-97e1-41ee-bee9-e2f52fe5ba8d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 10:49:07,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:49:07,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 10:49:07,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:49:08,083 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:49:08,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:49:08,241 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:49:08,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055809884] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:49:08,241 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:49:08,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 10:49:08,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604693348] [2022-11-20 10:49:08,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:49:08,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:49:08,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:49:08,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:49:08,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:49:08,246 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 179 [2022-11-20 10:49:08,248 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 163 transitions, 370 flow. Second operand has 10 states, 10 states have (on average 158.5) internal successors, (1585), 10 states have internal predecessors, (1585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:08,248 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:49:08,248 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 179 [2022-11-20 10:49:08,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:49:08,768 INFO L130 PetriNetUnfolder]: 177/1703 cut-off events. [2022-11-20 10:49:08,768 INFO L131 PetriNetUnfolder]: For 83/83 co-relation queries the response was YES. [2022-11-20 10:49:08,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2264 conditions, 1703 events. 177/1703 cut-off events. For 83/83 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 11029 event pairs, 28 based on Foata normal form. 9/1617 useless extension candidates. Maximal degree in co-relation 1786. Up to 135 conditions per place. [2022-11-20 10:49:08,783 INFO L137 encePairwiseOnDemand]: 173/179 looper letters, 48 selfloop transitions, 14 changer transitions 0/209 dead transitions. [2022-11-20 10:49:08,783 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 209 transitions, 619 flow [2022-11-20 10:49:08,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 10:49:08,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-20 10:49:08,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1624 transitions. [2022-11-20 10:49:08,788 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9072625698324023 [2022-11-20 10:49:08,788 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1624 transitions. [2022-11-20 10:49:08,788 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1624 transitions. [2022-11-20 10:49:08,790 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:49:08,790 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1624 transitions. [2022-11-20 10:49:08,794 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 162.4) internal successors, (1624), 10 states have internal predecessors, (1624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:08,799 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 179.0) internal successors, (1969), 11 states have internal predecessors, (1969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:08,800 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 179.0) internal successors, (1969), 11 states have internal predecessors, (1969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:08,801 INFO L175 Difference]: Start difference. First operand has 166 places, 163 transitions, 370 flow. Second operand 10 states and 1624 transitions. [2022-11-20 10:49:08,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 209 transitions, 619 flow [2022-11-20 10:49:08,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 209 transitions, 617 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 10:49:08,808 INFO L231 Difference]: Finished difference. Result has 177 places, 176 transitions, 462 flow [2022-11-20 10:49:08,808 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=368, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=462, PETRI_PLACES=177, PETRI_TRANSITIONS=176} [2022-11-20 10:49:08,809 INFO L288 CegarLoopForPetriNet]: 164 programPoint places, 13 predicate places. [2022-11-20 10:49:08,809 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 176 transitions, 462 flow [2022-11-20 10:49:08,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 158.5) internal successors, (1585), 10 states have internal predecessors, (1585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:08,811 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:49:08,811 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:49:08,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ad4dd19-97e1-41ee-bee9-e2f52fe5ba8d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 10:49:09,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ad4dd19-97e1-41ee-bee9-e2f52fe5ba8d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:49:09,024 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-20 10:49:09,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:49:09,024 INFO L85 PathProgramCache]: Analyzing trace with hash 901631510, now seen corresponding path program 1 times [2022-11-20 10:49:09,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:49:09,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020201784] [2022-11-20 10:49:09,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:49:09,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:49:09,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:49:09,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:49:09,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:49:09,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020201784] [2022-11-20 10:49:09,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020201784] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:49:09,228 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:49:09,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:49:09,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438506809] [2022-11-20 10:49:09,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:49:09,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:49:09,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:49:09,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:49:09,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:49:09,231 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 179 [2022-11-20 10:49:09,232 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 176 transitions, 462 flow. Second operand has 3 states, 3 states have (on average 160.66666666666666) internal successors, (482), 3 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:09,232 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:49:09,232 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 179 [2022-11-20 10:49:09,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:49:09,464 INFO L130 PetriNetUnfolder]: 53/1075 cut-off events. [2022-11-20 10:49:09,465 INFO L131 PetriNetUnfolder]: For 56/56 co-relation queries the response was YES. [2022-11-20 10:49:09,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1371 conditions, 1075 events. 53/1075 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 4725 event pairs, 10 based on Foata normal form. 11/1041 useless extension candidates. Maximal degree in co-relation 843. Up to 46 conditions per place. [2022-11-20 10:49:09,471 INFO L137 encePairwiseOnDemand]: 175/179 looper letters, 12 selfloop transitions, 4 changer transitions 0/173 dead transitions. [2022-11-20 10:49:09,471 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 173 transitions, 473 flow [2022-11-20 10:49:09,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:49:09,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 10:49:09,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 489 transitions. [2022-11-20 10:49:09,473 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9106145251396648 [2022-11-20 10:49:09,473 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 489 transitions. [2022-11-20 10:49:09,473 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 489 transitions. [2022-11-20 10:49:09,474 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:49:09,474 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 489 transitions. [2022-11-20 10:49:09,475 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:09,476 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 179.0) internal successors, (716), 4 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:09,477 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 179.0) internal successors, (716), 4 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:09,477 INFO L175 Difference]: Start difference. First operand has 177 places, 176 transitions, 462 flow. Second operand 3 states and 489 transitions. [2022-11-20 10:49:09,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 173 transitions, 473 flow [2022-11-20 10:49:09,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 173 transitions, 461 flow, removed 5 selfloop flow, removed 1 redundant places. [2022-11-20 10:49:09,483 INFO L231 Difference]: Finished difference. Result has 177 places, 171 transitions, 430 flow [2022-11-20 10:49:09,483 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=422, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=430, PETRI_PLACES=177, PETRI_TRANSITIONS=171} [2022-11-20 10:49:09,484 INFO L288 CegarLoopForPetriNet]: 164 programPoint places, 13 predicate places. [2022-11-20 10:49:09,484 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 171 transitions, 430 flow [2022-11-20 10:49:09,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 160.66666666666666) internal successors, (482), 3 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:09,485 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:49:09,485 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:49:09,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 10:49:09,486 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-20 10:49:09,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:49:09,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1610220699, now seen corresponding path program 1 times [2022-11-20 10:49:09,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:49:09,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22235076] [2022-11-20 10:49:09,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:49:09,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:49:09,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:49:09,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:49:09,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:49:09,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22235076] [2022-11-20 10:49:09,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22235076] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:49:09,701 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:49:09,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 10:49:09,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945496245] [2022-11-20 10:49:09,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:49:09,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 10:49:09,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:49:09,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 10:49:09,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-20 10:49:09,705 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 179 [2022-11-20 10:49:09,706 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 171 transitions, 430 flow. Second operand has 7 states, 7 states have (on average 148.28571428571428) internal successors, (1038), 7 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:09,707 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:49:09,707 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 179 [2022-11-20 10:49:09,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:49:10,177 INFO L130 PetriNetUnfolder]: 119/1230 cut-off events. [2022-11-20 10:49:10,177 INFO L131 PetriNetUnfolder]: For 129/129 co-relation queries the response was YES. [2022-11-20 10:49:10,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1837 conditions, 1230 events. 119/1230 cut-off events. For 129/129 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 6113 event pairs, 19 based on Foata normal form. 0/1177 useless extension candidates. Maximal degree in co-relation 1239. Up to 178 conditions per place. [2022-11-20 10:49:10,185 INFO L137 encePairwiseOnDemand]: 168/179 looper letters, 49 selfloop transitions, 13 changer transitions 0/199 dead transitions. [2022-11-20 10:49:10,185 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 199 transitions, 639 flow [2022-11-20 10:49:10,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 10:49:10,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 10:49:10,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1371 transitions. [2022-11-20 10:49:10,190 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.851024208566108 [2022-11-20 10:49:10,190 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1371 transitions. [2022-11-20 10:49:10,190 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1371 transitions. [2022-11-20 10:49:10,191 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:49:10,191 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1371 transitions. [2022-11-20 10:49:10,195 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 152.33333333333334) internal successors, (1371), 9 states have internal predecessors, (1371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:10,198 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 179.0) internal successors, (1790), 10 states have internal predecessors, (1790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:10,199 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 179.0) internal successors, (1790), 10 states have internal predecessors, (1790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:10,199 INFO L175 Difference]: Start difference. First operand has 177 places, 171 transitions, 430 flow. Second operand 9 states and 1371 transitions. [2022-11-20 10:49:10,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 199 transitions, 639 flow [2022-11-20 10:49:10,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 199 transitions, 635 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 10:49:10,206 INFO L231 Difference]: Finished difference. Result has 189 places, 178 transitions, 514 flow [2022-11-20 10:49:10,207 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=426, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=514, PETRI_PLACES=189, PETRI_TRANSITIONS=178} [2022-11-20 10:49:10,210 INFO L288 CegarLoopForPetriNet]: 164 programPoint places, 25 predicate places. [2022-11-20 10:49:10,210 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 178 transitions, 514 flow [2022-11-20 10:49:10,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 148.28571428571428) internal successors, (1038), 7 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:10,215 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:49:10,218 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:49:10,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-20 10:49:10,219 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-20 10:49:10,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:49:10,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1888412297, now seen corresponding path program 1 times [2022-11-20 10:49:10,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:49:10,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853127988] [2022-11-20 10:49:10,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:49:10,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:49:10,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:49:12,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:49:12,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:49:12,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853127988] [2022-11-20 10:49:12,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853127988] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:49:12,281 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:49:12,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-11-20 10:49:12,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069558878] [2022-11-20 10:49:12,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:49:12,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-20 10:49:12,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:49:12,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-20 10:49:12,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2022-11-20 10:49:12,286 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 179 [2022-11-20 10:49:12,289 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 178 transitions, 514 flow. Second operand has 24 states, 24 states have (on average 107.41666666666667) internal successors, (2578), 24 states have internal predecessors, (2578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:12,289 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:49:12,289 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 179 [2022-11-20 10:49:12,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:49:15,628 INFO L130 PetriNetUnfolder]: 1008/3988 cut-off events. [2022-11-20 10:49:15,629 INFO L131 PetriNetUnfolder]: For 554/554 co-relation queries the response was YES. [2022-11-20 10:49:15,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7445 conditions, 3988 events. 1008/3988 cut-off events. For 554/554 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 28803 event pairs, 174 based on Foata normal form. 0/3864 useless extension candidates. Maximal degree in co-relation 4391. Up to 1516 conditions per place. [2022-11-20 10:49:15,661 INFO L137 encePairwiseOnDemand]: 145/179 looper letters, 229 selfloop transitions, 42 changer transitions 4/372 dead transitions. [2022-11-20 10:49:15,661 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 372 transitions, 1586 flow [2022-11-20 10:49:15,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-20 10:49:15,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2022-11-20 10:49:15,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 3515 transitions. [2022-11-20 10:49:15,672 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6334474680122545 [2022-11-20 10:49:15,672 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 3515 transitions. [2022-11-20 10:49:15,673 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 3515 transitions. [2022-11-20 10:49:15,675 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:49:15,675 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 3515 transitions. [2022-11-20 10:49:15,685 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 113.38709677419355) internal successors, (3515), 31 states have internal predecessors, (3515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:15,697 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 179.0) internal successors, (5728), 32 states have internal predecessors, (5728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:15,701 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 179.0) internal successors, (5728), 32 states have internal predecessors, (5728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:15,701 INFO L175 Difference]: Start difference. First operand has 189 places, 178 transitions, 514 flow. Second operand 31 states and 3515 transitions. [2022-11-20 10:49:15,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 372 transitions, 1586 flow [2022-11-20 10:49:15,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 372 transitions, 1569 flow, removed 3 selfloop flow, removed 3 redundant places. [2022-11-20 10:49:15,715 INFO L231 Difference]: Finished difference. Result has 243 places, 216 transitions, 829 flow [2022-11-20 10:49:15,715 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=506, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=829, PETRI_PLACES=243, PETRI_TRANSITIONS=216} [2022-11-20 10:49:15,716 INFO L288 CegarLoopForPetriNet]: 164 programPoint places, 79 predicate places. [2022-11-20 10:49:15,716 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 216 transitions, 829 flow [2022-11-20 10:49:15,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 107.41666666666667) internal successors, (2578), 24 states have internal predecessors, (2578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:15,718 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:49:15,718 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:49:15,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-20 10:49:15,718 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-20 10:49:15,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:49:15,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1416928729, now seen corresponding path program 2 times [2022-11-20 10:49:15,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:49:15,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042551981] [2022-11-20 10:49:15,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:49:15,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:49:15,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:49:17,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:49:17,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:49:17,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042551981] [2022-11-20 10:49:17,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042551981] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:49:17,871 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:49:17,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-11-20 10:49:17,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540612782] [2022-11-20 10:49:17,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:49:17,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-20 10:49:17,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:49:17,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-20 10:49:17,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=727, Unknown=0, NotChecked=0, Total=812 [2022-11-20 10:49:17,876 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 179 [2022-11-20 10:49:17,879 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 216 transitions, 829 flow. Second operand has 29 states, 29 states have (on average 95.27586206896552) internal successors, (2763), 29 states have internal predecessors, (2763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:17,879 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:49:17,879 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 179 [2022-11-20 10:49:17,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:49:22,446 INFO L130 PetriNetUnfolder]: 1256/5024 cut-off events. [2022-11-20 10:49:22,447 INFO L131 PetriNetUnfolder]: For 2356/2356 co-relation queries the response was YES. [2022-11-20 10:49:22,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11006 conditions, 5024 events. 1256/5024 cut-off events. For 2356/2356 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 39239 event pairs, 298 based on Foata normal form. 4/4941 useless extension candidates. Maximal degree in co-relation 6762. Up to 1537 conditions per place. [2022-11-20 10:49:22,522 INFO L137 encePairwiseOnDemand]: 143/179 looper letters, 234 selfloop transitions, 60 changer transitions 4/387 dead transitions. [2022-11-20 10:49:22,522 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 387 transitions, 2078 flow [2022-11-20 10:49:22,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-20 10:49:22,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-11-20 10:49:22,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 3234 transitions. [2022-11-20 10:49:22,534 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5645949720670391 [2022-11-20 10:49:22,535 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 3234 transitions. [2022-11-20 10:49:22,535 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 3234 transitions. [2022-11-20 10:49:22,537 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:49:22,537 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 3234 transitions. [2022-11-20 10:49:22,544 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 101.0625) internal successors, (3234), 32 states have internal predecessors, (3234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:22,554 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 179.0) internal successors, (5907), 33 states have internal predecessors, (5907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:22,557 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 179.0) internal successors, (5907), 33 states have internal predecessors, (5907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:22,557 INFO L175 Difference]: Start difference. First operand has 243 places, 216 transitions, 829 flow. Second operand 32 states and 3234 transitions. [2022-11-20 10:49:22,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 387 transitions, 2078 flow [2022-11-20 10:49:22,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 387 transitions, 2074 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-20 10:49:22,577 INFO L231 Difference]: Finished difference. Result has 287 places, 235 transitions, 1151 flow [2022-11-20 10:49:22,577 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=825, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=1151, PETRI_PLACES=287, PETRI_TRANSITIONS=235} [2022-11-20 10:49:22,578 INFO L288 CegarLoopForPetriNet]: 164 programPoint places, 123 predicate places. [2022-11-20 10:49:22,578 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 235 transitions, 1151 flow [2022-11-20 10:49:22,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 95.27586206896552) internal successors, (2763), 29 states have internal predecessors, (2763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:22,579 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:49:22,580 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:49:22,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-20 10:49:22,580 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-20 10:49:22,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:49:22,581 INFO L85 PathProgramCache]: Analyzing trace with hash 724628569, now seen corresponding path program 3 times [2022-11-20 10:49:22,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:49:22,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975822478] [2022-11-20 10:49:22,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:49:22,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:49:22,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:49:24,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:49:24,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:49:24,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975822478] [2022-11-20 10:49:24,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975822478] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:49:24,688 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:49:24,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-11-20 10:49:24,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025468565] [2022-11-20 10:49:24,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:49:24,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-20 10:49:24,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:49:24,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-20 10:49:24,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=724, Unknown=0, NotChecked=0, Total=812 [2022-11-20 10:49:24,694 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 179 [2022-11-20 10:49:24,698 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 235 transitions, 1151 flow. Second operand has 29 states, 29 states have (on average 95.27586206896552) internal successors, (2763), 29 states have internal predecessors, (2763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:24,698 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:49:24,698 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 179 [2022-11-20 10:49:24,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:49:29,321 INFO L130 PetriNetUnfolder]: 1414/5681 cut-off events. [2022-11-20 10:49:29,321 INFO L131 PetriNetUnfolder]: For 3834/3834 co-relation queries the response was YES. [2022-11-20 10:49:29,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13251 conditions, 5681 events. 1414/5681 cut-off events. For 3834/3834 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 46008 event pairs, 67 based on Foata normal form. 4/5586 useless extension candidates. Maximal degree in co-relation 7349. Up to 1326 conditions per place. [2022-11-20 10:49:29,399 INFO L137 encePairwiseOnDemand]: 144/179 looper letters, 237 selfloop transitions, 78 changer transitions 4/408 dead transitions. [2022-11-20 10:49:29,399 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 408 transitions, 2490 flow [2022-11-20 10:49:29,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-20 10:49:29,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-11-20 10:49:29,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 3426 transitions. [2022-11-20 10:49:29,411 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.562931317778508 [2022-11-20 10:49:29,412 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 3426 transitions. [2022-11-20 10:49:29,412 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 3426 transitions. [2022-11-20 10:49:29,415 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:49:29,415 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 3426 transitions. [2022-11-20 10:49:29,436 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 100.76470588235294) internal successors, (3426), 34 states have internal predecessors, (3426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:29,448 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 179.0) internal successors, (6265), 35 states have internal predecessors, (6265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:29,451 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 179.0) internal successors, (6265), 35 states have internal predecessors, (6265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:29,452 INFO L175 Difference]: Start difference. First operand has 287 places, 235 transitions, 1151 flow. Second operand 34 states and 3426 transitions. [2022-11-20 10:49:29,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 408 transitions, 2490 flow [2022-11-20 10:49:29,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 408 transitions, 2395 flow, removed 27 selfloop flow, removed 15 redundant places. [2022-11-20 10:49:29,483 INFO L231 Difference]: Finished difference. Result has 318 places, 252 transitions, 1460 flow [2022-11-20 10:49:29,484 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=1080, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=1460, PETRI_PLACES=318, PETRI_TRANSITIONS=252} [2022-11-20 10:49:29,485 INFO L288 CegarLoopForPetriNet]: 164 programPoint places, 154 predicate places. [2022-11-20 10:49:29,486 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 252 transitions, 1460 flow [2022-11-20 10:49:29,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 95.27586206896552) internal successors, (2763), 29 states have internal predecessors, (2763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:29,487 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:49:29,487 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:49:29,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-20 10:49:29,489 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-20 10:49:29,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:49:29,490 INFO L85 PathProgramCache]: Analyzing trace with hash -639461629, now seen corresponding path program 1 times [2022-11-20 10:49:29,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:49:29,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018031856] [2022-11-20 10:49:29,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:49:29,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:49:29,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 10:49:29,555 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 10:49:29,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 10:49:29,679 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 10:49:29,680 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 10:49:29,681 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 6 remaining) [2022-11-20 10:49:29,686 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 6 remaining) [2022-11-20 10:49:29,686 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 6 remaining) [2022-11-20 10:49:29,687 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-11-20 10:49:29,687 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-11-20 10:49:29,687 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-11-20 10:49:29,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-20 10:49:29,688 INFO L444 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:49:29,702 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-11-20 10:49:29,703 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-20 10:49:29,872 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 10:49:29 BasicIcfg [2022-11-20 10:49:29,873 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-20 10:49:29,873 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-20 10:49:29,873 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-20 10:49:29,874 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-20 10:49:29,878 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:49:05" (3/4) ... [2022-11-20 10:49:29,880 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-11-20 10:49:30,030 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ad4dd19-97e1-41ee-bee9-e2f52fe5ba8d/bin/uautomizer-ug76WZFUDN/witness.graphml [2022-11-20 10:49:30,030 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-20 10:49:30,031 INFO L158 Benchmark]: Toolchain (without parser) took 26605.33ms. Allocated memory was 161.5MB in the beginning and 813.7MB in the end (delta: 652.2MB). Free memory was 130.3MB in the beginning and 609.6MB in the end (delta: -479.3MB). Peak memory consumption was 332.8MB. Max. memory is 16.1GB. [2022-11-20 10:49:30,031 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 113.2MB. Free memory is still 61.8MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-20 10:49:30,032 INFO L158 Benchmark]: CACSL2BoogieTranslator took 832.99ms. Allocated memory is still 161.5MB. Free memory was 130.3MB in the beginning and 101.4MB in the end (delta: 28.9MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. [2022-11-20 10:49:30,032 INFO L158 Benchmark]: Boogie Procedure Inliner took 70.16ms. Allocated memory is still 161.5MB. Free memory was 101.4MB in the beginning and 98.3MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-20 10:49:30,032 INFO L158 Benchmark]: Boogie Preprocessor took 54.24ms. Allocated memory is still 161.5MB. Free memory was 98.3MB in the beginning and 96.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-20 10:49:30,032 INFO L158 Benchmark]: RCFGBuilder took 673.87ms. Allocated memory is still 161.5MB. Free memory was 96.7MB in the beginning and 129.1MB in the end (delta: -32.4MB). Peak memory consumption was 20.8MB. Max. memory is 16.1GB. [2022-11-20 10:49:30,033 INFO L158 Benchmark]: TraceAbstraction took 24810.72ms. Allocated memory was 161.5MB in the beginning and 813.7MB in the end (delta: 652.2MB). Free memory was 129.1MB in the beginning and 487.9MB in the end (delta: -358.8MB). Peak memory consumption was 293.1MB. Max. memory is 16.1GB. [2022-11-20 10:49:30,033 INFO L158 Benchmark]: Witness Printer took 157.18ms. Allocated memory is still 813.7MB. Free memory was 487.9MB in the beginning and 609.6MB in the end (delta: -121.6MB). Peak memory consumption was 35.7MB. Max. memory is 16.1GB. [2022-11-20 10:49:30,035 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 113.2MB. Free memory is still 61.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 832.99ms. Allocated memory is still 161.5MB. Free memory was 130.3MB in the beginning and 101.4MB in the end (delta: 28.9MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 70.16ms. Allocated memory is still 161.5MB. Free memory was 101.4MB in the beginning and 98.3MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 54.24ms. Allocated memory is still 161.5MB. Free memory was 98.3MB in the beginning and 96.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 673.87ms. Allocated memory is still 161.5MB. Free memory was 96.7MB in the beginning and 129.1MB in the end (delta: -32.4MB). Peak memory consumption was 20.8MB. Max. memory is 16.1GB. * TraceAbstraction took 24810.72ms. Allocated memory was 161.5MB in the beginning and 813.7MB in the end (delta: 652.2MB). Free memory was 129.1MB in the beginning and 487.9MB in the end (delta: -358.8MB). Peak memory consumption was 293.1MB. Max. memory is 16.1GB. * Witness Printer took 157.18ms. Allocated memory is still 813.7MB. Free memory was 487.9MB in the beginning and 609.6MB in the end (delta: -121.6MB). Peak memory consumption was 35.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 941]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L935] 0 static int top=0; VAL [top=0] [L936] 0 static unsigned int arr[(800)]; VAL [arr={3:0}, top=0] [L937] 0 pthread_mutex_t m; VAL [arr={3:0}, m={4:0}, top=0] [L938] 0 _Bool flag=(0); VAL [arr={3:0}, flag=0, m={4:0}, top=0] [L1020] 0 pthread_t id1, id2; VAL [arr={3:0}, flag=0, id1={7:0}, id2={5:0}, m={4:0}, top=0] [L1022] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arr={3:0}, flag=0, id1={7:0}, id2={5:0}, m={4:0}, pthread_create(&id1, ((void *)0), t1, ((void *)0))=9, top=0] [L989] 1 int i; VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, m={4:0}, top=0] [L990] 1 unsigned int tmp; VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, m={4:0}, top=0] [L991] 1 i=0 VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, top=0] [L991] COND TRUE 1 i<(800) VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, top=0] [L994] 1 tmp = __VERIFIER_nondet_uint() VAL [__VERIFIER_nondet_uint()=4294968095, arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, tmp=799, top=0] [L1023] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arr={3:0}, flag=0, id1={7:0}, id2={5:0}, m={4:0}, pthread_create(&id2, ((void *)0), t2, ((void *)0))=10, top=0] [L995] CALL 1 assume_abort_if_not(tmp < (800)) [L23] COND FALSE 1 !(!cond) VAL [\old(cond)=1, arr={3:0}, cond=1, flag=0, m={4:0}, top=0] [L995] RET 1 assume_abort_if_not(tmp < (800)) [L996] CALL, EXPR 1 push(arr,tmp) [L961] COND FALSE 1 !(top==(800)) VAL [\old(x)=799, arr={3:0}, flag=0, m={4:0}, stack={3:0}, stack={3:0}, top=0, x=799] [L968] CALL, EXPR 1 get_top() [L953] 1 return top; VAL [\result=0, arr={3:0}, flag=0, m={4:0}, top=0] [L968] RET, EXPR 1 get_top() [L968] 1 stack[get_top()] = x VAL [\old(x)=799, arr={3:0}, flag=0, get_top()=0, m={4:0}, stack={3:0}, stack={3:0}, top=0, x=799] [L969] CALL 1 inc_top() [L945] 1 top++ VAL [arr={3:0}, flag=0, m={4:0}, top=1] [L969] RET 1 inc_top() [L971] 1 return 0; VAL [\old(x)=799, \result=0, arr={3:0}, flag=0, m={4:0}, stack={3:0}, stack={3:0}, top=1, x=799] [L996] RET, EXPR 1 push(arr,tmp) [L996] COND FALSE 1 !(push(arr,tmp)==(-1)) VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, push(arr,tmp)=0, tmp=799, top=1] [L998] 1 flag=(1) VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=0, m={4:0}, tmp=799, top=1] [L1005] 2 int i; VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, m={4:0}, top=1] [L1006] 2 i=0 VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=0, m={4:0}, top=1] [L1006] COND TRUE 2 i<(800) VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=0, m={4:0}, top=1] [L1009] COND TRUE 2 \read(flag) VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=0, m={4:0}, top=1] [L1011] CALL, EXPR 2 pop(arr) [L975] CALL, EXPR 2 get_top() [L953] 2 return top; VAL [\result=0, \result=1, arr={3:0}, flag=1, m={4:0}, top=1] [L975] RET, EXPR 2 get_top() [L975] COND FALSE 2 !(get_top()==0) VAL [arr={3:0}, flag=1, get_top()=1, m={4:0}, stack={3:0}, stack={3:0}, top=1] [L982] CALL 2 dec_top() [L949] 2 top-- VAL [arr={3:0}, flag=1, m={4:0}, top=0] [L982] RET 2 dec_top() [L983] CALL, EXPR 2 get_top() [L953] 2 return top; VAL [\result=0, \result=0, arr={3:0}, flag=1, m={4:0}, top=0] [L983] RET, EXPR 2 get_top() [L983] EXPR 2 stack[get_top()] VAL [arr={3:0}, flag=1, get_top()=0, m={4:0}, stack={3:0}, stack={3:0}, stack[get_top()]=799, top=0] [L983] 2 return stack[get_top()]; VAL [\result=799, arr={3:0}, flag=1, get_top()=0, m={4:0}, stack={3:0}, stack={3:0}, stack[get_top()]=799, top=0] [L1011] RET, EXPR 2 pop(arr) [L1011] COND FALSE 2 !(!(pop(arr)!=(-2))) VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=0, m={4:0}, pop(arr)=799, top=0] [L1006] 2 i++ VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, top=0] [L1006] COND TRUE 2 i<(800) VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, top=0] [L1009] COND TRUE 2 \read(flag) VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, top=0] [L1011] CALL, EXPR 2 pop(arr) [L975] CALL, EXPR 2 get_top() [L953] 2 return top; VAL [\result=0, \result=0, arr={3:0}, flag=1, m={4:0}, top=0] [L975] RET, EXPR 2 get_top() [L975] COND TRUE 2 get_top()==0 VAL [arr={3:0}, flag=1, get_top()=0, m={4:0}, stack={3:0}, stack={3:0}, top=0] [L978] 2 return (-2); VAL [\result=-2, arr={3:0}, flag=1, m={4:0}, stack={3:0}, stack={3:0}, top=0] [L1011] RET, EXPR 2 pop(arr) [L1011] COND TRUE 2 !(pop(arr)!=(-2)) VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, pop(arr)=-2, top=0] [L1012] CALL 2 error() [L941] 2 reach_error() VAL [arr={3:0}, flag=1, m={4:0}, top=0] - UnprovableResult [Line: 1023]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 1022]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 941]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 288 locations, 6 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.1s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 24.5s, OverallIterations: 10, TraceHistogramMax: 2, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 15.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1283 SdHoareTripleChecker+Valid, 4.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1283 mSDsluCounter, 2862 SdHoareTripleChecker+Invalid, 3.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2633 mSDsCounter, 36 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5592 IncrementalHoareTripleChecker+Invalid, 5628 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 36 mSolverCounterUnsat, 229 mSDtfsCounter, 5592 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 396 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1775 ImplicationChecksByTransitivity, 5.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1460occurred in iteration=9, InterpolantAutomatonStates: 129, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 7.8s InterpolantComputationTime, 1156 NumberOfCodeBlocks, 1156 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 1098 ConstructedInterpolants, 0 QuantifiedInterpolants, 8455 SizeOfPredicates, 2 NumberOfNonLiveVariables, 240 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 11 InterpolantComputations, 8 PerfectInterpolantSequences, 12/66 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-11-20 10:49:30,054 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ad4dd19-97e1-41ee-bee9-e2f52fe5ba8d/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE