./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_24-sound_lock_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 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_0d662f71-f9f7-4873-80f7-34bf7838d043/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d662f71-f9f7-4873-80f7-34bf7838d043/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d662f71-f9f7-4873-80f7-34bf7838d043/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d662f71-f9f7-4873-80f7-34bf7838d043/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_24-sound_lock_racing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d662f71-f9f7-4873-80f7-34bf7838d043/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d662f71-f9f7-4873-80f7-34bf7838d043/bin/uautomizer-verify-uTZkv6EMXl --witnessprinter.witness.filename witness --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 1eea0d699fc30cae440905f5eeea19b8e9e5d0b5cc249e9ffded8d356549b279 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:21:17,327 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:21:17,410 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d662f71-f9f7-4873-80f7-34bf7838d043/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-12 02:21:17,421 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:21:17,421 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:21:17,463 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:21:17,463 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:21:17,464 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:21:17,469 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:21:17,474 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:21:17,475 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:21:17,476 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:21:17,476 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:21:17,478 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:21:17,479 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:21:17,479 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:21:17,479 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:21:17,480 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:21:17,480 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:21:17,481 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:21:17,481 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:21:17,482 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:21:17,482 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:21:17,482 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:21:17,483 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:21:17,484 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:21:17,484 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:21:17,485 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:21:17,485 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:21:17,486 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:21:17,487 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:21:17,487 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:21:17,487 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:21:17,488 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:21:17,488 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:21:17,488 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:21:17,488 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:21:17,489 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:21:17,489 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:21:17,489 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_0d662f71-f9f7-4873-80f7-34bf7838d043/bin/uautomizer-verify-uTZkv6EMXl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d662f71-f9f7-4873-80f7-34bf7838d043/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1eea0d699fc30cae440905f5eeea19b8e9e5d0b5cc249e9ffded8d356549b279 [2023-11-12 02:21:17,800 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:21:17,830 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:21:17,833 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:21:17,834 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:21:17,835 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:21:17,836 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d662f71-f9f7-4873-80f7-34bf7838d043/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/goblint-regression/28-race_reach_24-sound_lock_racing.i [2023-11-12 02:21:20,983 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:21:21,356 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:21:21,359 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d662f71-f9f7-4873-80f7-34bf7838d043/sv-benchmarks/c/goblint-regression/28-race_reach_24-sound_lock_racing.i [2023-11-12 02:21:21,382 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d662f71-f9f7-4873-80f7-34bf7838d043/bin/uautomizer-verify-uTZkv6EMXl/data/4217d84b3/82d3c416760c49cebc6ce36d1d689eff/FLAG0b1db1331 [2023-11-12 02:21:21,399 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d662f71-f9f7-4873-80f7-34bf7838d043/bin/uautomizer-verify-uTZkv6EMXl/data/4217d84b3/82d3c416760c49cebc6ce36d1d689eff [2023-11-12 02:21:21,402 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:21:21,407 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:21:21,414 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:21:21,414 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:21:21,421 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:21:21,422 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:21:21" (1/1) ... [2023-11-12 02:21:21,423 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72f3e90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:21, skipping insertion in model container [2023-11-12 02:21:21,423 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:21:21" (1/1) ... [2023-11-12 02:21:21,492 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:21:21,825 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_0d662f71-f9f7-4873-80f7-34bf7838d043/sv-benchmarks/c/goblint-regression/28-race_reach_24-sound_lock_racing.i[30176,30189] [2023-11-12 02:21:21,850 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:21:21,864 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:21:21,898 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_0d662f71-f9f7-4873-80f7-34bf7838d043/sv-benchmarks/c/goblint-regression/28-race_reach_24-sound_lock_racing.i[30176,30189] [2023-11-12 02:21:21,907 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:21:21,959 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:21:21,960 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:21 WrapperNode [2023-11-12 02:21:21,960 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:21:21,962 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:21:21,962 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:21:21,962 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:21:21,971 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:21" (1/1) ... [2023-11-12 02:21:22,006 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:21" (1/1) ... [2023-11-12 02:21:22,043 INFO L138 Inliner]: procedures = 170, calls = 36, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 87 [2023-11-12 02:21:22,044 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:21:22,045 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:21:22,045 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:21:22,045 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:21:22,055 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:21" (1/1) ... [2023-11-12 02:21:22,056 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:21" (1/1) ... [2023-11-12 02:21:22,059 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:21" (1/1) ... [2023-11-12 02:21:22,060 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:21" (1/1) ... [2023-11-12 02:21:22,067 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:21" (1/1) ... [2023-11-12 02:21:22,071 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:21" (1/1) ... [2023-11-12 02:21:22,074 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:21" (1/1) ... [2023-11-12 02:21:22,076 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:21" (1/1) ... [2023-11-12 02:21:22,079 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:21:22,080 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:21:22,081 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:21:22,081 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:21:22,082 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:21" (1/1) ... [2023-11-12 02:21:22,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:21:22,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d662f71-f9f7-4873-80f7-34bf7838d043/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:21:22,126 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d662f71-f9f7-4873-80f7-34bf7838d043/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:21:22,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d662f71-f9f7-4873-80f7-34bf7838d043/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:21:22,176 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 02:21:22,176 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 02:21:22,176 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-12 02:21:22,177 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:21:22,177 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 02:21:22,178 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-12 02:21:22,178 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-12 02:21:22,178 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 02:21:22,178 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:21:22,179 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:21:22,179 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:21:22,180 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-12 02:21:22,367 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:21:22,378 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:21:22,683 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:21:22,698 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:21:22,698 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-11-12 02:21:22,701 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:21:22 BoogieIcfgContainer [2023-11-12 02:21:22,701 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:21:22,704 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:21:22,704 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:21:22,708 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:21:22,709 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:21:21" (1/3) ... [2023-11-12 02:21:22,710 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f2f9b03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:21:22, skipping insertion in model container [2023-11-12 02:21:22,710 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:21" (2/3) ... [2023-11-12 02:21:22,711 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f2f9b03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:21:22, skipping insertion in model container [2023-11-12 02:21:22,712 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:21:22" (3/3) ... [2023-11-12 02:21:22,714 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_24-sound_lock_racing.i [2023-11-12 02:21:22,724 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-12 02:21:22,735 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:21:22,736 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 02:21:22,736 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-12 02:21:22,790 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-12 02:21:22,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 118 transitions, 243 flow [2023-11-12 02:21:22,898 INFO L124 PetriNetUnfolderBase]: 18/156 cut-off events. [2023-11-12 02:21:22,898 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-12 02:21:22,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161 conditions, 156 events. 18/156 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 342 event pairs, 0 based on Foata normal form. 0/133 useless extension candidates. Maximal degree in co-relation 78. Up to 4 conditions per place. [2023-11-12 02:21:22,905 INFO L82 GeneralOperation]: Start removeDead. Operand has 108 places, 118 transitions, 243 flow [2023-11-12 02:21:22,910 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 104 places, 113 transitions, 230 flow [2023-11-12 02:21:22,914 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:21:22,925 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 104 places, 113 transitions, 230 flow [2023-11-12 02:21:22,928 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 104 places, 113 transitions, 230 flow [2023-11-12 02:21:22,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 104 places, 113 transitions, 230 flow [2023-11-12 02:21:22,967 INFO L124 PetriNetUnfolderBase]: 17/151 cut-off events. [2023-11-12 02:21:22,967 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:21:22,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155 conditions, 151 events. 17/151 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 329 event pairs, 0 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 78. Up to 4 conditions per place. [2023-11-12 02:21:22,972 INFO L119 LiptonReduction]: Number of co-enabled transitions 2464 [2023-11-12 02:21:28,682 INFO L134 LiptonReduction]: Checked pairs total: 4216 [2023-11-12 02:21:28,683 INFO L136 LiptonReduction]: Total number of compositions: 104 [2023-11-12 02:21:28,700 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:21:28,708 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=LoopHeads, 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;@584a07a0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:21:28,709 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-12 02:21:28,717 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:21:28,717 INFO L124 PetriNetUnfolderBase]: 1/9 cut-off events. [2023-11-12 02:21:28,717 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:21:28,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:21:28,718 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-12 02:21:28,719 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:21:28,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:21:28,726 INFO L85 PathProgramCache]: Analyzing trace with hash 14010920, now seen corresponding path program 1 times [2023-11-12 02:21:28,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:21:28,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64671756] [2023-11-12 02:21:28,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:28,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:21:28,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:29,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:21:29,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:21:29,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64671756] [2023-11-12 02:21:29,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64671756] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:21:29,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:21:29,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 02:21:29,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836696052] [2023-11-12 02:21:29,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:21:29,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:21:29,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:21:29,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:21:29,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:21:29,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 222 [2023-11-12 02:21:29,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 32 transitions, 68 flow. Second operand has 3 states, 3 states have (on average 102.33333333333333) internal successors, (307), 3 states have internal predecessors, (307), 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) [2023-11-12 02:21:29,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:21:29,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 222 [2023-11-12 02:21:29,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:21:29,397 INFO L124 PetriNetUnfolderBase]: 69/171 cut-off events. [2023-11-12 02:21:29,399 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:21:29,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 340 conditions, 171 events. 69/171 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 548 event pairs, 21 based on Foata normal form. 9/163 useless extension candidates. Maximal degree in co-relation 316. Up to 114 conditions per place. [2023-11-12 02:21:29,404 INFO L140 encePairwiseOnDemand]: 209/222 looper letters, 17 selfloop transitions, 2 changer transitions 8/29 dead transitions. [2023-11-12 02:21:29,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 29 transitions, 116 flow [2023-11-12 02:21:29,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:21:29,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:21:29,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 345 transitions. [2023-11-12 02:21:29,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5180180180180181 [2023-11-12 02:21:29,435 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 345 transitions. [2023-11-12 02:21:29,436 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 345 transitions. [2023-11-12 02:21:29,441 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:21:29,444 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 345 transitions. [2023-11-12 02:21:29,452 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 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) [2023-11-12 02:21:29,458 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 222.0) internal successors, (888), 4 states have internal predecessors, (888), 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) [2023-11-12 02:21:29,459 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 222.0) internal successors, (888), 4 states have internal predecessors, (888), 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) [2023-11-12 02:21:29,461 INFO L175 Difference]: Start difference. First operand has 26 places, 32 transitions, 68 flow. Second operand 3 states and 345 transitions. [2023-11-12 02:21:29,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 29 transitions, 116 flow [2023-11-12 02:21:29,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 29 transitions, 116 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-12 02:21:29,467 INFO L231 Difference]: Finished difference. Result has 27 places, 17 transitions, 46 flow [2023-11-12 02:21:29,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=46, PETRI_PLACES=27, PETRI_TRANSITIONS=17} [2023-11-12 02:21:29,475 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 1 predicate places. [2023-11-12 02:21:29,475 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 17 transitions, 46 flow [2023-11-12 02:21:29,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 102.33333333333333) internal successors, (307), 3 states have internal predecessors, (307), 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) [2023-11-12 02:21:29,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:21:29,477 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-12 02:21:29,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 02:21:29,478 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:21:29,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:21:29,490 INFO L85 PathProgramCache]: Analyzing trace with hash 590001453, now seen corresponding path program 1 times [2023-11-12 02:21:29,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:21:29,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774065371] [2023-11-12 02:21:29,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:29,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:21:29,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:21:29,564 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-12 02:21:29,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:21:29,647 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-12 02:21:29,648 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-12 02:21:29,651 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-12 02:21:29,654 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-12 02:21:29,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 02:21:29,655 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-12 02:21:29,658 WARN L234 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-12 02:21:29,658 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-12 02:21:29,684 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-12 02:21:29,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 133 places, 148 transitions, 312 flow [2023-11-12 02:21:29,756 INFO L124 PetriNetUnfolderBase]: 32/250 cut-off events. [2023-11-12 02:21:29,757 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-12 02:21:29,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 262 conditions, 250 events. 32/250 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 699 event pairs, 0 based on Foata normal form. 0/211 useless extension candidates. Maximal degree in co-relation 158. Up to 8 conditions per place. [2023-11-12 02:21:29,760 INFO L82 GeneralOperation]: Start removeDead. Operand has 133 places, 148 transitions, 312 flow [2023-11-12 02:21:29,763 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 133 places, 148 transitions, 312 flow [2023-11-12 02:21:29,763 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:21:29,764 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 133 places, 148 transitions, 312 flow [2023-11-12 02:21:29,764 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 133 places, 148 transitions, 312 flow [2023-11-12 02:21:29,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 133 places, 148 transitions, 312 flow [2023-11-12 02:21:29,804 INFO L124 PetriNetUnfolderBase]: 32/250 cut-off events. [2023-11-12 02:21:29,804 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-12 02:21:29,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 262 conditions, 250 events. 32/250 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 699 event pairs, 0 based on Foata normal form. 0/211 useless extension candidates. Maximal degree in co-relation 158. Up to 8 conditions per place. [2023-11-12 02:21:29,816 INFO L119 LiptonReduction]: Number of co-enabled transitions 7112 [2023-11-12 02:21:34,964 INFO L134 LiptonReduction]: Checked pairs total: 17479 [2023-11-12 02:21:34,964 INFO L136 LiptonReduction]: Total number of compositions: 116 [2023-11-12 02:21:34,968 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:21:34,969 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=LoopHeads, 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;@584a07a0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:21:34,970 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-12 02:21:34,973 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:21:34,974 INFO L124 PetriNetUnfolderBase]: 1/8 cut-off events. [2023-11-12 02:21:34,974 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:21:34,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:21:34,974 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-12 02:21:34,975 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:21:34,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:21:34,976 INFO L85 PathProgramCache]: Analyzing trace with hash 23061978, now seen corresponding path program 1 times [2023-11-12 02:21:34,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:21:34,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041692703] [2023-11-12 02:21:34,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:34,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:21:35,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:35,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:21:35,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:21:35,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041692703] [2023-11-12 02:21:35,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041692703] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:21:35,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:21:35,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 02:21:35,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312352138] [2023-11-12 02:21:35,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:21:35,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:21:35,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:21:35,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:21:35,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:21:35,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 264 [2023-11-12 02:21:35,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 55 transitions, 126 flow. Second operand has 3 states, 3 states have (on average 122.33333333333333) internal successors, (367), 3 states have internal predecessors, (367), 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) [2023-11-12 02:21:35,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:21:35,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 264 [2023-11-12 02:21:35,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:21:35,585 INFO L124 PetriNetUnfolderBase]: 1627/2904 cut-off events. [2023-11-12 02:21:35,585 INFO L125 PetriNetUnfolderBase]: For 60/60 co-relation queries the response was YES. [2023-11-12 02:21:35,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5629 conditions, 2904 events. 1627/2904 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 16609 event pairs, 562 based on Foata normal form. 522/3135 useless extension candidates. Maximal degree in co-relation 3943. Up to 2412 conditions per place. [2023-11-12 02:21:35,604 INFO L140 encePairwiseOnDemand]: 246/264 looper letters, 32 selfloop transitions, 3 changer transitions 14/57 dead transitions. [2023-11-12 02:21:35,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 57 transitions, 231 flow [2023-11-12 02:21:35,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:21:35,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:21:35,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 432 transitions. [2023-11-12 02:21:35,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2023-11-12 02:21:35,608 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 432 transitions. [2023-11-12 02:21:35,608 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 432 transitions. [2023-11-12 02:21:35,609 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:21:35,609 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 432 transitions. [2023-11-12 02:21:35,611 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 144.0) internal successors, (432), 3 states have internal predecessors, (432), 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) [2023-11-12 02:21:35,615 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 264.0) internal successors, (1056), 4 states have internal predecessors, (1056), 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) [2023-11-12 02:21:35,617 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 264.0) internal successors, (1056), 4 states have internal predecessors, (1056), 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) [2023-11-12 02:21:35,617 INFO L175 Difference]: Start difference. First operand has 44 places, 55 transitions, 126 flow. Second operand 3 states and 432 transitions. [2023-11-12 02:21:35,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 57 transitions, 231 flow [2023-11-12 02:21:35,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 57 transitions, 231 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-12 02:21:35,621 INFO L231 Difference]: Finished difference. Result has 47 places, 34 transitions, 93 flow [2023-11-12 02:21:35,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=264, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=93, PETRI_PLACES=47, PETRI_TRANSITIONS=34} [2023-11-12 02:21:35,623 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2023-11-12 02:21:35,623 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 34 transitions, 93 flow [2023-11-12 02:21:35,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 122.33333333333333) internal successors, (367), 3 states have internal predecessors, (367), 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) [2023-11-12 02:21:35,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:21:35,624 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-12 02:21:35,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 02:21:35,625 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:21:35,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:21:35,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1523464002, now seen corresponding path program 1 times [2023-11-12 02:21:35,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:21:35,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844060867] [2023-11-12 02:21:35,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:35,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:21:35,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:21:35,684 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-12 02:21:35,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:21:35,706 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-12 02:21:35,706 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-12 02:21:35,707 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-12 02:21:35,707 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-12 02:21:35,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 02:21:35,707 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-12 02:21:35,708 WARN L234 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-12 02:21:35,708 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-12 02:21:35,731 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-12 02:21:35,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 158 places, 178 transitions, 383 flow [2023-11-12 02:21:35,787 INFO L124 PetriNetUnfolderBase]: 51/379 cut-off events. [2023-11-12 02:21:35,787 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-12 02:21:35,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 404 conditions, 379 events. 51/379 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1215 event pairs, 1 based on Foata normal form. 0/320 useless extension candidates. Maximal degree in co-relation 258. Up to 16 conditions per place. [2023-11-12 02:21:35,792 INFO L82 GeneralOperation]: Start removeDead. Operand has 158 places, 178 transitions, 383 flow [2023-11-12 02:21:35,795 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 158 places, 178 transitions, 383 flow [2023-11-12 02:21:35,796 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:21:35,796 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 158 places, 178 transitions, 383 flow [2023-11-12 02:21:35,796 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 158 places, 178 transitions, 383 flow [2023-11-12 02:21:35,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 158 places, 178 transitions, 383 flow [2023-11-12 02:21:35,882 INFO L124 PetriNetUnfolderBase]: 51/379 cut-off events. [2023-11-12 02:21:35,883 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-12 02:21:35,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 404 conditions, 379 events. 51/379 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1215 event pairs, 1 based on Foata normal form. 0/320 useless extension candidates. Maximal degree in co-relation 258. Up to 16 conditions per place. [2023-11-12 02:21:35,902 INFO L119 LiptonReduction]: Number of co-enabled transitions 13272 [2023-11-12 02:21:41,727 INFO L134 LiptonReduction]: Checked pairs total: 37369 [2023-11-12 02:21:41,728 INFO L136 LiptonReduction]: Total number of compositions: 132 [2023-11-12 02:21:41,730 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:21:41,732 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=LoopHeads, 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;@584a07a0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:21:41,732 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-12 02:21:41,734 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:21:41,735 INFO L124 PetriNetUnfolderBase]: 1/9 cut-off events. [2023-11-12 02:21:41,735 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:21:41,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:21:41,735 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-12 02:21:41,736 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:21:41,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:21:41,736 INFO L85 PathProgramCache]: Analyzing trace with hash 33527294, now seen corresponding path program 1 times [2023-11-12 02:21:41,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:21:41,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871802518] [2023-11-12 02:21:41,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:41,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:21:41,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:41,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:21:41,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:21:41,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871802518] [2023-11-12 02:21:41,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871802518] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:21:41,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:21:41,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 02:21:41,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841853794] [2023-11-12 02:21:41,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:21:41,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:21:41,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:21:41,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:21:41,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:21:41,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 310 [2023-11-12 02:21:41,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 76 transitions, 179 flow. Second operand has 3 states, 3 states have (on average 142.33333333333334) internal successors, (427), 3 states have internal predecessors, (427), 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) [2023-11-12 02:21:41,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:21:41,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 310 [2023-11-12 02:21:41,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:21:46,312 INFO L124 PetriNetUnfolderBase]: 23764/35555 cut-off events. [2023-11-12 02:21:46,313 INFO L125 PetriNetUnfolderBase]: For 1093/1093 co-relation queries the response was YES. [2023-11-12 02:21:46,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69806 conditions, 35555 events. 23764/35555 cut-off events. For 1093/1093 co-relation queries the response was YES. Maximal size of possible extension queue 970. Compared 241166 event pairs, 10042 based on Foata normal form. 7127/40030 useless extension candidates. Maximal degree in co-relation 38074. Up to 32541 conditions per place. [2023-11-12 02:21:46,499 INFO L140 encePairwiseOnDemand]: 284/310 looper letters, 44 selfloop transitions, 4 changer transitions 15/74 dead transitions. [2023-11-12 02:21:46,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 74 transitions, 311 flow [2023-11-12 02:21:46,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:21:46,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:21:46,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 516 transitions. [2023-11-12 02:21:46,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5548387096774193 [2023-11-12 02:21:46,503 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 516 transitions. [2023-11-12 02:21:46,503 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 516 transitions. [2023-11-12 02:21:46,504 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:21:46,504 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 516 transitions. [2023-11-12 02:21:46,506 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 172.0) internal successors, (516), 3 states have internal predecessors, (516), 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) [2023-11-12 02:21:46,509 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 310.0) internal successors, (1240), 4 states have internal predecessors, (1240), 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) [2023-11-12 02:21:46,510 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 310.0) internal successors, (1240), 4 states have internal predecessors, (1240), 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) [2023-11-12 02:21:46,510 INFO L175 Difference]: Start difference. First operand has 59 places, 76 transitions, 179 flow. Second operand 3 states and 516 transitions. [2023-11-12 02:21:46,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 74 transitions, 311 flow [2023-11-12 02:21:46,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 74 transitions, 311 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-12 02:21:46,517 INFO L231 Difference]: Finished difference. Result has 61 places, 47 transitions, 132 flow [2023-11-12 02:21:46,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=310, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=61, PETRI_TRANSITIONS=47} [2023-11-12 02:21:46,518 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 2 predicate places. [2023-11-12 02:21:46,518 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 47 transitions, 132 flow [2023-11-12 02:21:46,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 142.33333333333334) internal successors, (427), 3 states have internal predecessors, (427), 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) [2023-11-12 02:21:46,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:21:46,519 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:21:46,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-12 02:21:46,520 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:21:46,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:21:46,520 INFO L85 PathProgramCache]: Analyzing trace with hash 257726343, now seen corresponding path program 1 times [2023-11-12 02:21:46,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:21:46,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834843380] [2023-11-12 02:21:46,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:46,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:21:46,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:46,607 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:21:46,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:21:46,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834843380] [2023-11-12 02:21:46,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834843380] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:21:46,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601870490] [2023-11-12 02:21:46,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:46,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:21:46,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d662f71-f9f7-4873-80f7-34bf7838d043/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:21:46,612 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d662f71-f9f7-4873-80f7-34bf7838d043/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:21:46,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d662f71-f9f7-4873-80f7-34bf7838d043/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:21:46,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:46,735 INFO L262 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 02:21:46,738 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:21:47,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:21:47,398 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:21:47,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:21:47,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601870490] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:21:47,420 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:21:47,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-11-12 02:21:47,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140697062] [2023-11-12 02:21:47,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:21:47,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 02:21:47,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:21:47,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 02:21:47,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:21:47,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 310 [2023-11-12 02:21:47,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 47 transitions, 132 flow. Second operand has 6 states, 6 states have (on average 143.5) internal successors, (861), 6 states have internal predecessors, (861), 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) [2023-11-12 02:21:47,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:21:47,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 310 [2023-11-12 02:21:47,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:21:48,635 INFO L124 PetriNetUnfolderBase]: 5560/9099 cut-off events. [2023-11-12 02:21:48,635 INFO L125 PetriNetUnfolderBase]: For 3212/3212 co-relation queries the response was YES. [2023-11-12 02:21:48,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18367 conditions, 9099 events. 5560/9099 cut-off events. For 3212/3212 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 60666 event pairs, 64 based on Foata normal form. 0/9097 useless extension candidates. Maximal degree in co-relation 9068. Up to 5346 conditions per place. [2023-11-12 02:21:48,721 INFO L140 encePairwiseOnDemand]: 307/310 looper letters, 87 selfloop transitions, 4 changer transitions 0/102 dead transitions. [2023-11-12 02:21:48,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 102 transitions, 450 flow [2023-11-12 02:21:48,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:21:48,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-12 02:21:48,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 933 transitions. [2023-11-12 02:21:48,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5016129032258064 [2023-11-12 02:21:48,727 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 933 transitions. [2023-11-12 02:21:48,727 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 933 transitions. [2023-11-12 02:21:48,728 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:21:48,728 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 933 transitions. [2023-11-12 02:21:48,733 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 155.5) internal successors, (933), 6 states have internal predecessors, (933), 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) [2023-11-12 02:21:48,739 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 310.0) internal successors, (2170), 7 states have internal predecessors, (2170), 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) [2023-11-12 02:21:48,741 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 310.0) internal successors, (2170), 7 states have internal predecessors, (2170), 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) [2023-11-12 02:21:48,741 INFO L175 Difference]: Start difference. First operand has 61 places, 47 transitions, 132 flow. Second operand 6 states and 933 transitions. [2023-11-12 02:21:48,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 102 transitions, 450 flow [2023-11-12 02:21:48,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 102 transitions, 438 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-12 02:21:48,749 INFO L231 Difference]: Finished difference. Result has 55 places, 46 transitions, 130 flow [2023-11-12 02:21:48,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=310, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=130, PETRI_PLACES=55, PETRI_TRANSITIONS=46} [2023-11-12 02:21:48,751 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -4 predicate places. [2023-11-12 02:21:48,751 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 46 transitions, 130 flow [2023-11-12 02:21:48,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 143.5) internal successors, (861), 6 states have internal predecessors, (861), 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) [2023-11-12 02:21:48,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:21:48,752 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-11-12 02:21:48,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d662f71-f9f7-4873-80f7-34bf7838d043/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 02:21:48,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d662f71-f9f7-4873-80f7-34bf7838d043/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:21:48,967 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:21:48,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:21:48,968 INFO L85 PathProgramCache]: Analyzing trace with hash 776485529, now seen corresponding path program 1 times [2023-11-12 02:21:48,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:21:48,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651628637] [2023-11-12 02:21:48,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:48,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:21:49,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:21:49,012 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-12 02:21:49,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:21:49,055 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-12 02:21:49,056 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-12 02:21:49,057 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-12 02:21:49,057 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-12 02:21:49,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-12 02:21:49,058 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-12 02:21:49,059 WARN L234 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-12 02:21:49,059 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-12 02:21:49,110 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-12 02:21:49,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 183 places, 208 transitions, 456 flow [2023-11-12 02:21:49,296 INFO L124 PetriNetUnfolderBase]: 82/580 cut-off events. [2023-11-12 02:21:49,296 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-12 02:21:49,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 631 conditions, 580 events. 82/580 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2168 event pairs, 6 based on Foata normal form. 0/493 useless extension candidates. Maximal degree in co-relation 399. Up to 32 conditions per place. [2023-11-12 02:21:49,303 INFO L82 GeneralOperation]: Start removeDead. Operand has 183 places, 208 transitions, 456 flow [2023-11-12 02:21:49,307 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 183 places, 208 transitions, 456 flow [2023-11-12 02:21:49,307 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:21:49,308 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 183 places, 208 transitions, 456 flow [2023-11-12 02:21:49,308 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 183 places, 208 transitions, 456 flow [2023-11-12 02:21:49,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 183 places, 208 transitions, 456 flow [2023-11-12 02:21:49,403 INFO L124 PetriNetUnfolderBase]: 82/580 cut-off events. [2023-11-12 02:21:49,403 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-12 02:21:49,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 631 conditions, 580 events. 82/580 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2168 event pairs, 6 based on Foata normal form. 0/493 useless extension candidates. Maximal degree in co-relation 399. Up to 32 conditions per place. [2023-11-12 02:21:49,440 INFO L119 LiptonReduction]: Number of co-enabled transitions 21168 [2023-11-12 02:21:56,003 INFO L134 LiptonReduction]: Checked pairs total: 63045 [2023-11-12 02:21:56,003 INFO L136 LiptonReduction]: Total number of compositions: 147 [2023-11-12 02:21:56,005 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:21:56,006 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=LoopHeads, 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;@584a07a0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:21:56,006 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-12 02:21:56,008 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:21:56,008 INFO L124 PetriNetUnfolderBase]: 1/9 cut-off events. [2023-11-12 02:21:56,008 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:21:56,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:21:56,009 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-12 02:21:56,009 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:21:56,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:21:56,009 INFO L85 PathProgramCache]: Analyzing trace with hash 45379819, now seen corresponding path program 1 times [2023-11-12 02:21:56,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:21:56,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134145533] [2023-11-12 02:21:56,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:56,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:21:56,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:56,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:21:56,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:21:56,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134145533] [2023-11-12 02:21:56,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134145533] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:21:56,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:21:56,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:21:56,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337412395] [2023-11-12 02:21:56,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:21:56,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:21:56,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:21:56,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:21:56,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:21:56,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 355 [2023-11-12 02:21:56,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 95 transitions, 230 flow. Second operand has 3 states, 3 states have (on average 165.33333333333334) internal successors, (496), 3 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:21:56,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:21:56,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 355 [2023-11-12 02:21:56,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand