./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 e7bb482b 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_b6b9acc3-6163-438b-8c4b-2a3d6b2a25b9/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6b9acc3-6163-438b-8c4b-2a3d6b2a25b9/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6b9acc3-6163-438b-8c4b-2a3d6b2a25b9/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6b9acc3-6163-438b-8c4b-2a3d6b2a25b9/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/stack_longest-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6b9acc3-6163-438b-8c4b-2a3d6b2a25b9/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6b9acc3-6163-438b-8c4b-2a3d6b2a25b9/bin/uautomizer-verify-WvqO1wxjHP --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 --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:57:16,152 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:57:16,266 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6b9acc3-6163-438b-8c4b-2a3d6b2a25b9/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:57:16,276 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:57:16,277 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:57:16,312 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:57:16,314 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:57:16,314 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:57:16,315 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:57:16,321 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:57:16,322 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:57:16,323 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:57:16,323 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:57:16,325 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:57:16,326 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:57:16,326 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:57:16,327 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:57:16,327 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:57:16,327 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:57:16,328 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:57:16,328 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:57:16,329 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:57:16,330 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:57:16,330 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:57:16,330 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:57:16,331 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:57:16,332 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:57:16,332 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:57:16,333 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:57:16,333 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:57:16,335 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:57:16,335 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:57:16,336 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:57:16,336 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:57:16,336 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:57:16,336 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:57:16,337 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:57:16,337 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:57:16,337 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:57:16,338 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_b6b9acc3-6163-438b-8c4b-2a3d6b2a25b9/bin/uautomizer-verify-WvqO1wxjHP/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6b9acc3-6163-438b-8c4b-2a3d6b2a25b9/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 529fe0895c01c52d9b18b51c32204a307faf547c0c07b22bc1a431308affcf90 [2023-11-06 22:57:16,657 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:57:16,679 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:57:16,682 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:57:16,684 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:57:16,684 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:57:16,686 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6b9acc3-6163-438b-8c4b-2a3d6b2a25b9/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/pthread/stack_longest-1.i [2023-11-06 22:57:19,813 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:57:20,187 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:57:20,188 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6b9acc3-6163-438b-8c4b-2a3d6b2a25b9/sv-benchmarks/c/pthread/stack_longest-1.i [2023-11-06 22:57:20,207 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6b9acc3-6163-438b-8c4b-2a3d6b2a25b9/bin/uautomizer-verify-WvqO1wxjHP/data/86cfd7705/6f1dfab12fdd46718c60c1b964aa5051/FLAGb89e3387b [2023-11-06 22:57:20,224 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6b9acc3-6163-438b-8c4b-2a3d6b2a25b9/bin/uautomizer-verify-WvqO1wxjHP/data/86cfd7705/6f1dfab12fdd46718c60c1b964aa5051 [2023-11-06 22:57:20,231 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:57:20,233 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:57:20,238 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:57:20,239 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:57:20,244 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:57:20,244 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:57:20" (1/1) ... [2023-11-06 22:57:20,245 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15171088 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:20, skipping insertion in model container [2023-11-06 22:57:20,246 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:57:20" (1/1) ... [2023-11-06 22:57:20,296 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:57:20,858 WARN L240 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_b6b9acc3-6163-438b-8c4b-2a3d6b2a25b9/sv-benchmarks/c/pthread/stack_longest-1.i[41530,41543] [2023-11-06 22:57:20,904 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:57:20,916 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:57:20,953 WARN L240 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_b6b9acc3-6163-438b-8c4b-2a3d6b2a25b9/sv-benchmarks/c/pthread/stack_longest-1.i[41530,41543] [2023-11-06 22:57:20,965 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:57:21,087 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:57:21,087 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:21 WrapperNode [2023-11-06 22:57:21,088 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:57:21,089 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:57:21,089 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:57:21,089 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:57:21,097 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:21" (1/1) ... [2023-11-06 22:57:21,118 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:21" (1/1) ... [2023-11-06 22:57:21,149 INFO L138 Inliner]: procedures = 277, calls = 39, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 155 [2023-11-06 22:57:21,149 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:57:21,150 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:57:21,150 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:57:21,151 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:57:21,161 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:21" (1/1) ... [2023-11-06 22:57:21,161 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:21" (1/1) ... [2023-11-06 22:57:21,166 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:21" (1/1) ... [2023-11-06 22:57:21,166 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:21" (1/1) ... [2023-11-06 22:57:21,176 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:21" (1/1) ... [2023-11-06 22:57:21,184 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:21" (1/1) ... [2023-11-06 22:57:21,187 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:21" (1/1) ... [2023-11-06 22:57:21,191 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:21" (1/1) ... [2023-11-06 22:57:21,195 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:57:21,196 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:57:21,196 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:57:21,196 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:57:21,197 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:21" (1/1) ... [2023-11-06 22:57:21,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:57:21,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6b9acc3-6163-438b-8c4b-2a3d6b2a25b9/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:57:21,251 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6b9acc3-6163-438b-8c4b-2a3d6b2a25b9/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:57:21,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6b9acc3-6163-438b-8c4b-2a3d6b2a25b9/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:57:21,294 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-11-06 22:57:21,295 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-11-06 22:57:21,295 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-11-06 22:57:21,295 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-11-06 22:57:21,295 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:57:21,296 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:57:21,296 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 22:57:21,296 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 22:57:21,296 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-06 22:57:21,296 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:57:21,297 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:57:21,297 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:57:21,297 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:57:21,301 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-06 22:57:21,504 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:57:21,506 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:57:21,783 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:57:21,793 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:57:21,793 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-06 22:57:21,796 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:57:21 BoogieIcfgContainer [2023-11-06 22:57:21,796 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:57:21,799 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:57:21,799 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:57:21,803 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:57:21,803 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:57:20" (1/3) ... [2023-11-06 22:57:21,804 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2af0a528 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:57:21, skipping insertion in model container [2023-11-06 22:57:21,804 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:21" (2/3) ... [2023-11-06 22:57:21,805 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2af0a528 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:57:21, skipping insertion in model container [2023-11-06 22:57:21,805 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:57:21" (3/3) ... [2023-11-06 22:57:21,806 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longest-1.i [2023-11-06 22:57:21,816 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-06 22:57:21,828 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:57:21,828 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-06 22:57:21,828 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 22:57:21,934 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-06 22:57:21,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 163 places, 166 transitions, 346 flow [2023-11-06 22:57:22,075 INFO L124 PetriNetUnfolderBase]: 10/164 cut-off events. [2023-11-06 22:57:22,075 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:57:22,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173 conditions, 164 events. 10/164 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 424 event pairs, 0 based on Foata normal form. 0/152 useless extension candidates. Maximal degree in co-relation 126. Up to 3 conditions per place. [2023-11-06 22:57:22,088 INFO L82 GeneralOperation]: Start removeDead. Operand has 163 places, 166 transitions, 346 flow [2023-11-06 22:57:22,095 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 151 places, 154 transitions, 317 flow [2023-11-06 22:57:22,099 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:57:22,111 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 151 places, 154 transitions, 317 flow [2023-11-06 22:57:22,114 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 151 places, 154 transitions, 317 flow [2023-11-06 22:57:22,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 151 places, 154 transitions, 317 flow [2023-11-06 22:57:22,158 INFO L124 PetriNetUnfolderBase]: 10/154 cut-off events. [2023-11-06 22:57:22,158 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 22:57:22,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162 conditions, 154 events. 10/154 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 344 event pairs, 0 based on Foata normal form. 0/142 useless extension candidates. Maximal degree in co-relation 126. Up to 3 conditions per place. [2023-11-06 22:57:22,167 INFO L119 LiptonReduction]: Number of co-enabled transitions 8340 [2023-11-06 22:57:27,122 INFO L134 LiptonReduction]: Checked pairs total: 10950 [2023-11-06 22:57:27,122 INFO L136 LiptonReduction]: Total number of compositions: 148 [2023-11-06 22:57:27,139 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:57:27,148 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;@1cd2530b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:57:27,148 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-06 22:57:27,159 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:57:27,159 INFO L124 PetriNetUnfolderBase]: 0/14 cut-off events. [2023-11-06 22:57:27,160 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 22:57:27,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:57:27,161 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 22:57:27,161 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-06 22:57:27,174 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:57:27,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1584231326, now seen corresponding path program 1 times [2023-11-06 22:57:27,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:57:27,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543406057] [2023-11-06 22:57:27,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:57:27,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:57:27,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:57:27,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:57:27,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:57:27,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543406057] [2023-11-06 22:57:27,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543406057] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:57:27,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:57:27,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:57:27,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140021613] [2023-11-06 22:57:27,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:57:27,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:57:27,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:57:27,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:57:27,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:57:27,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 314 [2023-11-06 22:57:27,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 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) [2023-11-06 22:57:27,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:57:27,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 314 [2023-11-06 22:57:27,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:57:27,887 INFO L124 PetriNetUnfolderBase]: 773/1280 cut-off events. [2023-11-06 22:57:27,887 INFO L125 PetriNetUnfolderBase]: For 57/57 co-relation queries the response was YES. [2023-11-06 22:57:27,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2576 conditions, 1280 events. 773/1280 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 5414 event pairs, 216 based on Foata normal form. 0/1034 useless extension candidates. Maximal degree in co-relation 2370. Up to 714 conditions per place. [2023-11-06 22:57:27,904 INFO L140 encePairwiseOnDemand]: 309/314 looper letters, 53 selfloop transitions, 4 changer transitions 0/59 dead transitions. [2023-11-06 22:57:27,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 59 transitions, 247 flow [2023-11-06 22:57:27,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:57:27,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:57:27,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 511 transitions. [2023-11-06 22:57:27,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5424628450106157 [2023-11-06 22:57:27,935 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 511 transitions. [2023-11-06 22:57:27,936 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 511 transitions. [2023-11-06 22:57:27,940 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:57:27,943 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 511 transitions. [2023-11-06 22:57:27,948 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 170.33333333333334) internal successors, (511), 3 states have internal predecessors, (511), 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) [2023-11-06 22:57:27,956 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 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) [2023-11-06 22:57:27,957 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 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) [2023-11-06 22:57:27,959 INFO L175 Difference]: Start difference. First operand has 35 places, 33 transitions, 75 flow. Second operand 3 states and 511 transitions. [2023-11-06 22:57:27,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 59 transitions, 247 flow [2023-11-06 22:57:27,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 59 transitions, 239 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-06 22:57:27,967 INFO L231 Difference]: Finished difference. Result has 36 places, 36 transitions, 100 flow [2023-11-06 22:57:27,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=36, PETRI_TRANSITIONS=36} [2023-11-06 22:57:27,974 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 1 predicate places. [2023-11-06 22:57:27,975 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 36 transitions, 100 flow [2023-11-06 22:57:27,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 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) [2023-11-06 22:57:27,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:57:27,976 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:57:27,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:57:27,976 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-06 22:57:27,980 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:57:27,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1481729303, now seen corresponding path program 1 times [2023-11-06 22:57:27,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:57:27,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706273657] [2023-11-06 22:57:27,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:57:27,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:57:28,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:57:28,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:57:28,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:57:28,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706273657] [2023-11-06 22:57:28,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706273657] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:57:28,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:57:28,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:57:28,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099189357] [2023-11-06 22:57:28,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:57:28,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:57:28,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:57:28,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:57:28,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:57:28,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 314 [2023-11-06 22:57:28,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 36 transitions, 100 flow. Second operand has 3 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:57:28,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:57:28,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 314 [2023-11-06 22:57:28,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:57:28,483 INFO L124 PetriNetUnfolderBase]: 808/1356 cut-off events. [2023-11-06 22:57:28,485 INFO L125 PetriNetUnfolderBase]: For 175/175 co-relation queries the response was YES. [2023-11-06 22:57:28,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2924 conditions, 1356 events. 808/1356 cut-off events. For 175/175 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 5680 event pairs, 355 based on Foata normal form. 20/1174 useless extension candidates. Maximal degree in co-relation 2675. Up to 1082 conditions per place. [2023-11-06 22:57:28,495 INFO L140 encePairwiseOnDemand]: 311/314 looper letters, 46 selfloop transitions, 2 changer transitions 3/53 dead transitions. [2023-11-06 22:57:28,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 53 transitions, 243 flow [2023-11-06 22:57:28,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:57:28,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:57:28,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 505 transitions. [2023-11-06 22:57:28,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5360934182590233 [2023-11-06 22:57:28,499 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 505 transitions. [2023-11-06 22:57:28,499 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 505 transitions. [2023-11-06 22:57:28,500 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:57:28,500 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 505 transitions. [2023-11-06 22:57:28,502 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 168.33333333333334) internal successors, (505), 3 states have internal predecessors, (505), 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) [2023-11-06 22:57:28,505 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 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) [2023-11-06 22:57:28,506 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 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) [2023-11-06 22:57:28,507 INFO L175 Difference]: Start difference. First operand has 36 places, 36 transitions, 100 flow. Second operand 3 states and 505 transitions. [2023-11-06 22:57:28,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 53 transitions, 243 flow [2023-11-06 22:57:28,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 53 transitions, 233 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:57:28,511 INFO L231 Difference]: Finished difference. Result has 37 places, 37 transitions, 104 flow [2023-11-06 22:57:28,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=37, PETRI_TRANSITIONS=37} [2023-11-06 22:57:28,512 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 2 predicate places. [2023-11-06 22:57:28,512 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 37 transitions, 104 flow [2023-11-06 22:57:28,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:57:28,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:57:28,514 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:57:28,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 22:57:28,514 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-06 22:57:28,515 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:57:28,515 INFO L85 PathProgramCache]: Analyzing trace with hash -608831757, now seen corresponding path program 1 times [2023-11-06 22:57:28,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:57:28,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710977353] [2023-11-06 22:57:28,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:57:28,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:57:28,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:57:28,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:57:28,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:57:28,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710977353] [2023-11-06 22:57:28,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710977353] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:57:28,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:57:28,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:57:28,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136624452] [2023-11-06 22:57:28,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:57:28,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:57:28,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:57:28,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:57:28,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:57:28,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 314 [2023-11-06 22:57:28,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 37 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 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) [2023-11-06 22:57:28,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:57:28,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 314 [2023-11-06 22:57:28,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:57:28,924 INFO L124 PetriNetUnfolderBase]: 861/1440 cut-off events. [2023-11-06 22:57:28,924 INFO L125 PetriNetUnfolderBase]: For 135/135 co-relation queries the response was YES. [2023-11-06 22:57:28,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3178 conditions, 1440 events. 861/1440 cut-off events. For 135/135 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 6166 event pairs, 584 based on Foata normal form. 50/1332 useless extension candidates. Maximal degree in co-relation 2922. Up to 1258 conditions per place. [2023-11-06 22:57:28,935 INFO L140 encePairwiseOnDemand]: 311/314 looper letters, 50 selfloop transitions, 4 changer transitions 0/56 dead transitions. [2023-11-06 22:57:28,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 56 transitions, 264 flow [2023-11-06 22:57:28,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:57:28,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:57:28,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 502 transitions. [2023-11-06 22:57:28,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5329087048832272 [2023-11-06 22:57:28,939 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 502 transitions. [2023-11-06 22:57:28,939 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 502 transitions. [2023-11-06 22:57:28,939 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:57:28,940 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 502 transitions. [2023-11-06 22:57:28,941 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 167.33333333333334) internal successors, (502), 3 states have internal predecessors, (502), 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) [2023-11-06 22:57:28,944 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 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) [2023-11-06 22:57:28,945 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 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) [2023-11-06 22:57:28,946 INFO L175 Difference]: Start difference. First operand has 37 places, 37 transitions, 104 flow. Second operand 3 states and 502 transitions. [2023-11-06 22:57:28,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 56 transitions, 264 flow [2023-11-06 22:57:28,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 56 transitions, 262 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:57:28,948 INFO L231 Difference]: Finished difference. Result has 39 places, 38 transitions, 122 flow [2023-11-06 22:57:28,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=39, PETRI_TRANSITIONS=38} [2023-11-06 22:57:28,950 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 4 predicate places. [2023-11-06 22:57:28,950 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 38 transitions, 122 flow [2023-11-06 22:57:28,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 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) [2023-11-06 22:57:28,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:57:28,951 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:57:28,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 22:57:28,951 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-06 22:57:28,952 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:57:28,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1802784065, now seen corresponding path program 1 times [2023-11-06 22:57:28,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:57:28,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895353342] [2023-11-06 22:57:28,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:57:28,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:57:28,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:57:29,061 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:57:29,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:57:29,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895353342] [2023-11-06 22:57:29,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895353342] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:57:29,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452032182] [2023-11-06 22:57:29,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:57:29,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:57:29,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6b9acc3-6163-438b-8c4b-2a3d6b2a25b9/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:57:29,066 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6b9acc3-6163-438b-8c4b-2a3d6b2a25b9/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:57:29,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6b9acc3-6163-438b-8c4b-2a3d6b2a25b9/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:57:29,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:57:29,208 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:57:29,213 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:57:29,291 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:57:29,292 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:57:29,353 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:57:29,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452032182] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:57:29,354 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:57:29,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2023-11-06 22:57:29,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284717812] [2023-11-06 22:57:29,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:57:29,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:57:29,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:57:29,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:57:29,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-06 22:57:29,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 314 [2023-11-06 22:57:29,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 38 transitions, 122 flow. Second operand has 10 states, 10 states have (on average 150.6) internal successors, (1506), 10 states have internal predecessors, (1506), 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) [2023-11-06 22:57:29,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:57:29,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 314 [2023-11-06 22:57:29,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:57:30,215 INFO L124 PetriNetUnfolderBase]: 1815/2998 cut-off events. [2023-11-06 22:57:30,215 INFO L125 PetriNetUnfolderBase]: For 1081/1081 co-relation queries the response was YES. [2023-11-06 22:57:30,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7071 conditions, 2998 events. 1815/2998 cut-off events. For 1081/1081 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 14190 event pairs, 349 based on Foata normal form. 48/2734 useless extension candidates. Maximal degree in co-relation 6600. Up to 844 conditions per place. [2023-11-06 22:57:30,242 INFO L140 encePairwiseOnDemand]: 308/314 looper letters, 164 selfloop transitions, 22 changer transitions 0/187 dead transitions. [2023-11-06 22:57:30,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 187 transitions, 900 flow [2023-11-06 22:57:30,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 22:57:30,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-06 22:57:30,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1655 transitions. [2023-11-06 22:57:30,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5270700636942676 [2023-11-06 22:57:30,250 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1655 transitions. [2023-11-06 22:57:30,250 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1655 transitions. [2023-11-06 22:57:30,251 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:57:30,251 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1655 transitions. [2023-11-06 22:57:30,257 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 165.5) internal successors, (1655), 10 states have internal predecessors, (1655), 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) [2023-11-06 22:57:30,264 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 314.0) internal successors, (3454), 11 states have internal predecessors, (3454), 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) [2023-11-06 22:57:30,267 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 314.0) internal successors, (3454), 11 states have internal predecessors, (3454), 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) [2023-11-06 22:57:30,268 INFO L175 Difference]: Start difference. First operand has 39 places, 38 transitions, 122 flow. Second operand 10 states and 1655 transitions. [2023-11-06 22:57:30,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 187 transitions, 900 flow [2023-11-06 22:57:30,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 187 transitions, 887 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:57:30,283 INFO L231 Difference]: Finished difference. Result has 51 places, 56 transitions, 280 flow [2023-11-06 22:57:30,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=280, PETRI_PLACES=51, PETRI_TRANSITIONS=56} [2023-11-06 22:57:30,285 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 16 predicate places. [2023-11-06 22:57:30,285 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 56 transitions, 280 flow [2023-11-06 22:57:30,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 150.6) internal successors, (1506), 10 states have internal predecessors, (1506), 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) [2023-11-06 22:57:30,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:57:30,288 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:57:30,307 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6b9acc3-6163-438b-8c4b-2a3d6b2a25b9/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:57:30,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6b9acc3-6163-438b-8c4b-2a3d6b2a25b9/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:57:30,502 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-06 22:57:30,503 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:57:30,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1836347733, now seen corresponding path program 1 times [2023-11-06 22:57:30,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:57:30,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943558786] [2023-11-06 22:57:30,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:57:30,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:57:30,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:57:30,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:57:30,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:57:30,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943558786] [2023-11-06 22:57:30,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943558786] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:57:30,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:57:30,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:57:30,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429953872] [2023-11-06 22:57:30,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:57:30,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:57:30,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:57:30,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:57:30,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:57:30,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 314 [2023-11-06 22:57:30,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 56 transitions, 280 flow. Second operand has 3 states, 3 states have (on average 154.33333333333334) internal successors, (463), 3 states have internal predecessors, (463), 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) [2023-11-06 22:57:30,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:57:30,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 314 [2023-11-06 22:57:30,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:57:30,840 INFO L124 PetriNetUnfolderBase]: 573/1102 cut-off events. [2023-11-06 22:57:30,840 INFO L125 PetriNetUnfolderBase]: For 410/410 co-relation queries the response was YES. [2023-11-06 22:57:30,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2672 conditions, 1102 events. 573/1102 cut-off events. For 410/410 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 4840 event pairs, 98 based on Foata normal form. 0/1022 useless extension candidates. Maximal degree in co-relation 2202. Up to 785 conditions per place. [2023-11-06 22:57:30,848 INFO L140 encePairwiseOnDemand]: 309/314 looper letters, 46 selfloop transitions, 5 changer transitions 0/55 dead transitions. [2023-11-06 22:57:30,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 55 transitions, 329 flow [2023-11-06 22:57:30,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:57:30,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:57:30,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 489 transitions. [2023-11-06 22:57:30,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5191082802547771 [2023-11-06 22:57:30,851 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 489 transitions. [2023-11-06 22:57:30,852 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 489 transitions. [2023-11-06 22:57:30,852 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:57:30,852 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 489 transitions. [2023-11-06 22:57:30,854 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) [2023-11-06 22:57:30,856 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 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) [2023-11-06 22:57:30,857 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 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) [2023-11-06 22:57:30,857 INFO L175 Difference]: Start difference. First operand has 51 places, 56 transitions, 280 flow. Second operand 3 states and 489 transitions. [2023-11-06 22:57:30,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 55 transitions, 329 flow [2023-11-06 22:57:30,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 55 transitions, 317 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-11-06 22:57:30,862 INFO L231 Difference]: Finished difference. Result has 49 places, 46 transitions, 204 flow [2023-11-06 22:57:30,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=204, PETRI_PLACES=49, PETRI_TRANSITIONS=46} [2023-11-06 22:57:30,865 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 14 predicate places. [2023-11-06 22:57:30,865 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 46 transitions, 204 flow [2023-11-06 22:57:30,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 154.33333333333334) internal successors, (463), 3 states have internal predecessors, (463), 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) [2023-11-06 22:57:30,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:57:30,866 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:57:30,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 22:57:30,866 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-06 22:57:30,866 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:57:30,867 INFO L85 PathProgramCache]: Analyzing trace with hash -483208085, now seen corresponding path program 1 times [2023-11-06 22:57:30,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:57:30,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963813098] [2023-11-06 22:57:30,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:57:30,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:57:30,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:57:31,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:57:31,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:57:31,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963813098] [2023-11-06 22:57:31,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963813098] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:57:31,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:57:31,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:57:31,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345686254] [2023-11-06 22:57:31,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:57:31,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:57:31,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:57:31,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:57:31,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:57:31,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 314 [2023-11-06 22:57:31,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 46 transitions, 204 flow. Second operand has 5 states, 5 states have (on average 150.6) internal successors, (753), 5 states have internal predecessors, (753), 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) [2023-11-06 22:57:31,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:57:31,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 314 [2023-11-06 22:57:31,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:57:31,370 INFO L124 PetriNetUnfolderBase]: 727/1350 cut-off events. [2023-11-06 22:57:31,371 INFO L125 PetriNetUnfolderBase]: For 422/422 co-relation queries the response was YES. [2023-11-06 22:57:31,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3420 conditions, 1350 events. 727/1350 cut-off events. For 422/422 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 5700 event pairs, 207 based on Foata normal form. 12/1362 useless extension candidates. Maximal degree in co-relation 2802. Up to 529 conditions per place. [2023-11-06 22:57:31,381 INFO L140 encePairwiseOnDemand]: 308/314 looper letters, 80 selfloop transitions, 11 changer transitions 0/92 dead transitions. [2023-11-06 22:57:31,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 92 transitions, 526 flow [2023-11-06 22:57:31,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:57:31,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:57:31,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 819 transitions. [2023-11-06 22:57:31,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.521656050955414 [2023-11-06 22:57:31,385 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 819 transitions. [2023-11-06 22:57:31,386 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 819 transitions. [2023-11-06 22:57:31,386 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:57:31,386 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 819 transitions. [2023-11-06 22:57:31,389 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 163.8) internal successors, (819), 5 states have internal predecessors, (819), 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) [2023-11-06 22:57:31,393 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 314.0) internal successors, (1884), 6 states have internal predecessors, (1884), 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) [2023-11-06 22:57:31,394 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 314.0) internal successors, (1884), 6 states have internal predecessors, (1884), 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) [2023-11-06 22:57:31,394 INFO L175 Difference]: Start difference. First operand has 49 places, 46 transitions, 204 flow. Second operand 5 states and 819 transitions. [2023-11-06 22:57:31,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 92 transitions, 526 flow [2023-11-06 22:57:31,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 92 transitions, 513 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:57:31,399 INFO L231 Difference]: Finished difference. Result has 54 places, 48 transitions, 258 flow [2023-11-06 22:57:31,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=258, PETRI_PLACES=54, PETRI_TRANSITIONS=48} [2023-11-06 22:57:31,400 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 19 predicate places. [2023-11-06 22:57:31,400 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 48 transitions, 258 flow [2023-11-06 22:57:31,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 150.6) internal successors, (753), 5 states have internal predecessors, (753), 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) [2023-11-06 22:57:31,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:57:31,401 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:57:31,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-06 22:57:31,401 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-06 22:57:31,401 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:57:31,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1408695210, now seen corresponding path program 1 times [2023-11-06 22:57:31,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:57:31,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488289705] [2023-11-06 22:57:31,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:57:31,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:57:31,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:57:32,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:57:32,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:57:32,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488289705] [2023-11-06 22:57:32,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488289705] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:57:32,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:57:32,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-06 22:57:32,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87413297] [2023-11-06 22:57:32,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:57:32,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:57:32,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:57:32,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:57:32,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-11-06 22:57:32,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 314 [2023-11-06 22:57:32,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 48 transitions, 258 flow. Second operand has 10 states, 10 states have (on average 131.1) internal successors, (1311), 10 states have internal predecessors, (1311), 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) [2023-11-06 22:57:32,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:57:32,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 314 [2023-11-06 22:57:32,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:57:33,309 INFO L124 PetriNetUnfolderBase]: 1018/1929 cut-off events. [2023-11-06 22:57:33,309 INFO L125 PetriNetUnfolderBase]: For 1355/1355 co-relation queries the response was YES. [2023-11-06 22:57:33,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4887 conditions, 1929 events. 1018/1929 cut-off events. For 1355/1355 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 9589 event pairs, 303 based on Foata normal form. 0/1911 useless extension candidates. Maximal degree in co-relation 3046. Up to 1099 conditions per place. [2023-11-06 22:57:33,325 INFO L140 encePairwiseOnDemand]: 304/314 looper letters, 97 selfloop transitions, 11 changer transitions 3/115 dead transitions. [2023-11-06 22:57:33,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 115 transitions, 718 flow [2023-11-06 22:57:33,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:57:33,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-06 22:57:33,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1125 transitions. [2023-11-06 22:57:33,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4478503184713376 [2023-11-06 22:57:33,331 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1125 transitions. [2023-11-06 22:57:33,331 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1125 transitions. [2023-11-06 22:57:33,332 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:57:33,332 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1125 transitions. [2023-11-06 22:57:33,335 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 140.625) internal successors, (1125), 8 states have internal predecessors, (1125), 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) [2023-11-06 22:57:33,341 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 314.0) internal successors, (2826), 9 states have internal predecessors, (2826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:57:33,342 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 314.0) internal successors, (2826), 9 states have internal predecessors, (2826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:57:33,342 INFO L175 Difference]: Start difference. First operand has 54 places, 48 transitions, 258 flow. Second operand 8 states and 1125 transitions. [2023-11-06 22:57:33,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 115 transitions, 718 flow [2023-11-06 22:57:33,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 115 transitions, 700 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-11-06 22:57:33,349 INFO L231 Difference]: Finished difference. Result has 64 places, 58 transitions, 339 flow [2023-11-06 22:57:33,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=339, PETRI_PLACES=64, PETRI_TRANSITIONS=58} [2023-11-06 22:57:33,350 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 29 predicate places. [2023-11-06 22:57:33,351 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 58 transitions, 339 flow [2023-11-06 22:57:33,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 131.1) internal successors, (1311), 10 states have internal predecessors, (1311), 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) [2023-11-06 22:57:33,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:57:33,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:57:33,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-06 22:57:33,352 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-06 22:57:33,353 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:57:33,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1264659998, now seen corresponding path program 2 times [2023-11-06 22:57:33,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:57:33,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186567961] [2023-11-06 22:57:33,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:57:33,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:57:33,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:57:34,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:57:34,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:57:34,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186567961] [2023-11-06 22:57:34,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186567961] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:57:34,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:57:34,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-06 22:57:34,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777871712] [2023-11-06 22:57:34,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:57:34,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:57:34,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:57:34,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:57:34,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-11-06 22:57:34,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 314 [2023-11-06 22:57:34,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 58 transitions, 339 flow. Second operand has 10 states, 10 states have (on average 131.1) internal successors, (1311), 10 states have internal predecessors, (1311), 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) [2023-11-06 22:57:34,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:57:34,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 314 [2023-11-06 22:57:34,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:57:35,437 INFO L124 PetriNetUnfolderBase]: 1316/2482 cut-off events. [2023-11-06 22:57:35,438 INFO L125 PetriNetUnfolderBase]: For 1774/1774 co-relation queries the response was YES. [2023-11-06 22:57:35,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6721 conditions, 2482 events. 1316/2482 cut-off events. For 1774/1774 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 12704 event pairs, 408 based on Foata normal form. 0/2458 useless extension candidates. Maximal degree in co-relation 4330. Up to 1034 conditions per place. [2023-11-06 22:57:35,460 INFO L140 encePairwiseOnDemand]: 305/314 looper letters, 97 selfloop transitions, 16 changer transitions 3/120 dead transitions. [2023-11-06 22:57:35,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 120 transitions, 813 flow [2023-11-06 22:57:35,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:57:35,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-06 22:57:35,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1125 transitions. [2023-11-06 22:57:35,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4478503184713376 [2023-11-06 22:57:35,465 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1125 transitions. [2023-11-06 22:57:35,465 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1125 transitions. [2023-11-06 22:57:35,466 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:57:35,467 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1125 transitions. [2023-11-06 22:57:35,470 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 140.625) internal successors, (1125), 8 states have internal predecessors, (1125), 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) [2023-11-06 22:57:35,475 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 314.0) internal successors, (2826), 9 states have internal predecessors, (2826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:57:35,477 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 314.0) internal successors, (2826), 9 states have internal predecessors, (2826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:57:35,477 INFO L175 Difference]: Start difference. First operand has 64 places, 58 transitions, 339 flow. Second operand 8 states and 1125 transitions. [2023-11-06 22:57:35,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 120 transitions, 813 flow [2023-11-06 22:57:35,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 120 transitions, 813 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 22:57:35,490 INFO L231 Difference]: Finished difference. Result has 74 places, 64 transitions, 444 flow [2023-11-06 22:57:35,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=339, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=444, PETRI_PLACES=74, PETRI_TRANSITIONS=64} [2023-11-06 22:57:35,493 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 39 predicate places. [2023-11-06 22:57:35,494 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 64 transitions, 444 flow [2023-11-06 22:57:35,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 131.1) internal successors, (1311), 10 states have internal predecessors, (1311), 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) [2023-11-06 22:57:35,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:57:35,497 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:57:35,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-06 22:57:35,502 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-06 22:57:35,504 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:57:35,504 INFO L85 PathProgramCache]: Analyzing trace with hash -2008377427, now seen corresponding path program 1 times [2023-11-06 22:57:35,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:57:35,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571182381] [2023-11-06 22:57:35,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:57:35,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:57:35,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:57:35,666 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:57:35,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:57:35,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571182381] [2023-11-06 22:57:35,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571182381] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:57:35,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705204668] [2023-11-06 22:57:35,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:57:35,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:57:35,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6b9acc3-6163-438b-8c4b-2a3d6b2a25b9/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:57:35,674 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6b9acc3-6163-438b-8c4b-2a3d6b2a25b9/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:57:35,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6b9acc3-6163-438b-8c4b-2a3d6b2a25b9/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:57:35,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:57:35,822 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:57:35,825 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:57:35,874 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:57:35,874 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:57:35,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705204668] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:57:35,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:57:35,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2023-11-06 22:57:35,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430231790] [2023-11-06 22:57:35,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:57:35,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:57:35,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:57:35,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:57:35,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:57:35,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 314 [2023-11-06 22:57:35,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 64 transitions, 444 flow. Second operand has 6 states, 6 states have (on average 147.0) internal successors, (882), 6 states have internal predecessors, (882), 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) [2023-11-06 22:57:35,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:57:35,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 314 [2023-11-06 22:57:35,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:57:36,484 INFO L124 PetriNetUnfolderBase]: 1393/2595 cut-off events. [2023-11-06 22:57:36,485 INFO L125 PetriNetUnfolderBase]: For 2432/2432 co-relation queries the response was YES. [2023-11-06 22:57:36,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7481 conditions, 2595 events. 1393/2595 cut-off events. For 2432/2432 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 12941 event pairs, 526 based on Foata normal form. 16/2581 useless extension candidates. Maximal degree in co-relation 5158. Up to 998 conditions per place. [2023-11-06 22:57:36,505 INFO L140 encePairwiseOnDemand]: 307/314 looper letters, 113 selfloop transitions, 16 changer transitions 0/130 dead transitions. [2023-11-06 22:57:36,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 130 transitions, 997 flow [2023-11-06 22:57:36,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 22:57:36,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 22:57:36,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1096 transitions. [2023-11-06 22:57:36,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4986351228389445 [2023-11-06 22:57:36,510 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1096 transitions. [2023-11-06 22:57:36,510 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1096 transitions. [2023-11-06 22:57:36,511 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:57:36,511 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1096 transitions. [2023-11-06 22:57:36,515 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 156.57142857142858) internal successors, (1096), 7 states have internal predecessors, (1096), 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) [2023-11-06 22:57:36,520 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 314.0) internal successors, (2512), 8 states have internal predecessors, (2512), 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) [2023-11-06 22:57:36,521 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 314.0) internal successors, (2512), 8 states have internal predecessors, (2512), 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) [2023-11-06 22:57:36,521 INFO L175 Difference]: Start difference. First operand has 74 places, 64 transitions, 444 flow. Second operand 7 states and 1096 transitions. [2023-11-06 22:57:36,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 130 transitions, 997 flow [2023-11-06 22:57:36,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 130 transitions, 966 flow, removed 10 selfloop flow, removed 4 redundant places. [2023-11-06 22:57:36,532 INFO L231 Difference]: Finished difference. Result has 78 places, 73 transitions, 560 flow [2023-11-06 22:57:36,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=425, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=560, PETRI_PLACES=78, PETRI_TRANSITIONS=73} [2023-11-06 22:57:36,533 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 43 predicate places. [2023-11-06 22:57:36,533 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 73 transitions, 560 flow [2023-11-06 22:57:36,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 147.0) internal successors, (882), 6 states have internal predecessors, (882), 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) [2023-11-06 22:57:36,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:57:36,534 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:57:36,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6b9acc3-6163-438b-8c4b-2a3d6b2a25b9/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:57:36,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6b9acc3-6163-438b-8c4b-2a3d6b2a25b9/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-06 22:57:36,740 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-06 22:57:36,740 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:57:36,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1437858579, now seen corresponding path program 1 times [2023-11-06 22:57:36,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:57:36,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857121250] [2023-11-06 22:57:36,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:57:36,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:57:36,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:57:36,819 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 22:57:36,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:57:36,899 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 22:57:36,899 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-06 22:57:36,900 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 6 remaining) [2023-11-06 22:57:36,902 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 6 remaining) [2023-11-06 22:57:36,902 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 6 remaining) [2023-11-06 22:57:36,903 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-11-06 22:57:36,903 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-11-06 22:57:36,903 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-11-06 22:57:36,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-06 22:57:36,904 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:57:36,909 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-06 22:57:36,909 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-06 22:57:36,986 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 10:57:36 BasicIcfg [2023-11-06 22:57:36,986 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-06 22:57:36,987 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-06 22:57:36,987 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-06 22:57:36,987 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-06 22:57:36,989 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:57:21" (3/4) ... [2023-11-06 22:57:36,991 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-11-06 22:57:37,053 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6b9acc3-6163-438b-8c4b-2a3d6b2a25b9/bin/uautomizer-verify-WvqO1wxjHP/witness.graphml.graphml [2023-11-06 22:57:37,053 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-06 22:57:37,054 INFO L158 Benchmark]: Toolchain (without parser) took 16820.72ms. Allocated memory was 107.0MB in the beginning and 234.9MB in the end (delta: 127.9MB). Free memory was 61.6MB in the beginning and 108.9MB in the end (delta: -47.2MB). Peak memory consumption was 82.6MB. Max. memory is 16.1GB. [2023-11-06 22:57:37,054 INFO L158 Benchmark]: CDTParser took 0.35ms. Allocated memory is still 107.0MB. Free memory is still 79.0MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-06 22:57:37,054 INFO L158 Benchmark]: CACSL2BoogieTranslator took 850.41ms. Allocated memory was 107.0MB in the beginning and 134.2MB in the end (delta: 27.3MB). Free memory was 61.3MB in the beginning and 96.0MB in the end (delta: -34.7MB). Peak memory consumption was 28.0MB. Max. memory is 16.1GB. [2023-11-06 22:57:37,055 INFO L158 Benchmark]: Boogie Procedure Inliner took 60.73ms. Allocated memory is still 134.2MB. Free memory was 96.0MB in the beginning and 93.3MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-06 22:57:37,055 INFO L158 Benchmark]: Boogie Preprocessor took 44.93ms. Allocated memory is still 134.2MB. Free memory was 93.3MB in the beginning and 91.9MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-06 22:57:37,055 INFO L158 Benchmark]: RCFGBuilder took 600.78ms. Allocated memory is still 134.2MB. Free memory was 91.2MB in the beginning and 74.3MB in the end (delta: 16.9MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2023-11-06 22:57:37,056 INFO L158 Benchmark]: TraceAbstraction took 15187.49ms. Allocated memory was 134.2MB in the beginning and 234.9MB in the end (delta: 100.7MB). Free memory was 73.0MB in the beginning and 117.3MB in the end (delta: -44.2MB). Peak memory consumption was 56.7MB. Max. memory is 16.1GB. [2023-11-06 22:57:37,056 INFO L158 Benchmark]: Witness Printer took 66.02ms. Allocated memory is still 234.9MB. Free memory was 117.3MB in the beginning and 108.9MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-11-06 22:57:37,058 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35ms. Allocated memory is still 107.0MB. Free memory is still 79.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 850.41ms. Allocated memory was 107.0MB in the beginning and 134.2MB in the end (delta: 27.3MB). Free memory was 61.3MB in the beginning and 96.0MB in the end (delta: -34.7MB). Peak memory consumption was 28.0MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 60.73ms. Allocated memory is still 134.2MB. Free memory was 96.0MB in the beginning and 93.3MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 44.93ms. Allocated memory is still 134.2MB. Free memory was 93.3MB in the beginning and 91.9MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 600.78ms. Allocated memory is still 134.2MB. Free memory was 91.2MB in the beginning and 74.3MB in the end (delta: 16.9MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 15187.49ms. Allocated memory was 134.2MB in the beginning and 234.9MB in the end (delta: 100.7MB). Free memory was 73.0MB in the beginning and 117.3MB in the end (delta: -44.2MB). Peak memory consumption was 56.7MB. Max. memory is 16.1GB. * Witness Printer took 66.02ms. Allocated memory is still 234.9MB. Free memory was 117.3MB in the beginning and 108.9MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 5.0s, 151 PlacesBefore, 35 PlacesAfterwards, 154 TransitionsBefore, 33 TransitionsAfterwards, 8340 CoEnabledTransitionPairs, 6 FixpointIterations, 25 TrivialSequentialCompositions, 98 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 20 ConcurrentYvCompositions, 5 ChoiceCompositions, 148 TotalNumberOfCompositions, 10950 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 8703, independent: 8519, independent conditional: 0, independent unconditional: 8519, dependent: 184, dependent conditional: 0, dependent unconditional: 184, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 4801, independent: 4745, independent conditional: 0, independent unconditional: 4745, dependent: 56, dependent conditional: 0, dependent unconditional: 56, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 8703, independent: 3774, independent conditional: 0, independent unconditional: 3774, dependent: 128, dependent conditional: 0, dependent unconditional: 128, unknown: 4801, unknown conditional: 0, unknown unconditional: 4801] , Statistics on independence cache: Total cache size (in pairs): 198, Positive cache size: 181, Positive conditional cache size: 0, Positive unconditional cache size: 181, Negative cache size: 17, Negative conditional cache size: 0, Negative unconditional cache size: 17, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - 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; [L936] 0 static unsigned int arr[(800)]; [L937] 0 pthread_mutex_t m; [L938] 0 _Bool flag=(0); [L1020] 0 pthread_t id1, id2; [L1022] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arr={3:0}, flag=0, id1={6:0}, id2={5:0}, m={4:0}, pthread_create(&id1, ((void *)0), t1, ((void *)0))=-2, top=0] [L989] 1 int i; [L990] 1 unsigned int tmp; [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) [L994] 1 tmp = __VERIFIER_nondet_uint() [L995] CALL 1 assume_abort_if_not(tmp < (800)) [L23] COND FALSE 1 !(!cond) [L995] RET 1 assume_abort_if_not(tmp < (800)) [L996] CALL, EXPR 1 push(arr,tmp) [L1023] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arr={3:0}, flag=0, id1={6:0}, id2={5:0}, m={4:0}, pthread_create(&id2, ((void *)0), t2, ((void *)0))=-1, top=0] [L961] COND FALSE 1 !(top==(800)) [L968] CALL, EXPR 1 get_top() [L1005] 2 int i; [L1006] 2 i=0 VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, top=0] [L953] 1 return top; [L968] RET, EXPR 1 get_top() [L968] 1 stack[get_top()] = x [L969] CALL 1 inc_top() [L945] 1 top++ [L969] RET 1 inc_top() [L971] 1 return 0; [L996] RET, EXPR 1 push(arr,tmp) [L996] COND FALSE 1 !(push(arr,tmp)==(-1)) [L998] 1 flag=(1) VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=0, m={4:0}, tmp=0, top=1] [L991] 1 i++ VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, tmp=0, top=1] [L1006] COND TRUE 2 i<(800) [L1009] COND TRUE 2 \read(flag) [L1011] CALL, EXPR 2 pop(arr) [L975] CALL, EXPR 2 get_top() [L953] 2 return top; [L975] RET, EXPR 2 get_top() [L975] COND FALSE 2 !(get_top()==0) [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()] [L983] 2 return stack[get_top()]; [L1011] RET, EXPR 2 pop(arr) [L1011] COND FALSE 2 !(!(pop(arr)!=(-2))) [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) [L1009] COND TRUE 2 \read(flag) [L1011] CALL, EXPR 2 pop(arr) [L975] CALL, EXPR 2 get_top() [L953] 2 return top; [L975] RET, EXPR 2 get_top() [L975] COND TRUE 2 get_top()==0 [L978] 2 return (-2); [L1011] RET, EXPR 2 pop(arr) [L1011] COND TRUE 2 !(pop(arr)!=(-2)) [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) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - UnprovableResult [Line: 1022]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - UnprovableResult [Line: 941]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 266 locations, 6 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 14.9s, OverallIterations: 10, TraceHistogramMax: 2, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 5.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 5.2s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1121 SdHoareTripleChecker+Valid, 2.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 935 mSDsluCounter, 635 SdHoareTripleChecker+Invalid, 2.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 611 mSDsCounter, 48 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2750 IncrementalHoareTripleChecker+Invalid, 2798 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 48 mSolverCounterUnsat, 24 mSDtfsCounter, 2750 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 103 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=560occurred in iteration=9, InterpolantAutomatonStates: 50, 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, 0.3s SatisfiabilityAnalysisTime, 2.5s InterpolantComputationTime, 208 NumberOfCodeBlocks, 208 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 184 ConstructedInterpolants, 0 QuantifiedInterpolants, 1572 SizeOfPredicates, 3 NumberOfNonLiveVariables, 400 ConjunctsInSsa, 10 ConjunctsInUnsatCore, 12 InterpolantComputations, 8 PerfectInterpolantSequences, 7/15 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! [2023-11-06 22:57:37,079 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6b9acc3-6163-438b-8c4b-2a3d6b2a25b9/bin/uautomizer-verify-WvqO1wxjHP/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