./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_36-indirect_racefree.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_6ed4c911-e434-496c-aa5c-c25bf0877bf3/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ed4c911-e434-496c-aa5c-c25bf0877bf3/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_6ed4c911-e434-496c-aa5c-c25bf0877bf3/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ed4c911-e434-496c-aa5c-c25bf0877bf3/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_36-indirect_racefree.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ed4c911-e434-496c-aa5c-c25bf0877bf3/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_6ed4c911-e434-496c-aa5c-c25bf0877bf3/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 3eff698bae51c39e8a3a4c763800dbda831dabb73a169fa31c8e326faee47cd8 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:31:51,523 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:31:51,656 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ed4c911-e434-496c-aa5c-c25bf0877bf3/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-12 02:31:51,664 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:31:51,666 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:31:51,709 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:31:51,709 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:31:51,710 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:31:51,711 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:31:51,717 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:31:51,719 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:31:51,720 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:31:51,720 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:31:51,723 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:31:51,723 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:31:51,723 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:31:51,724 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:31:51,725 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:31:51,725 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:31:51,725 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:31:51,726 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:31:51,727 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:31:51,727 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:31:51,728 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:31:51,728 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:31:51,729 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:31:51,729 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:31:51,730 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:31:51,730 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:31:51,731 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:31:51,731 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:31:51,732 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:31:51,732 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:31:51,733 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:31:51,733 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:31:51,733 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:31:51,733 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:31:51,734 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:31:51,734 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:31:51,734 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_6ed4c911-e434-496c-aa5c-c25bf0877bf3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ed4c911-e434-496c-aa5c-c25bf0877bf3/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3eff698bae51c39e8a3a4c763800dbda831dabb73a169fa31c8e326faee47cd8 [2023-11-12 02:31:52,057 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:31:52,091 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:31:52,094 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:31:52,096 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:31:52,097 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:31:52,098 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ed4c911-e434-496c-aa5c-c25bf0877bf3/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/goblint-regression/28-race_reach_36-indirect_racefree.i [2023-11-12 02:31:55,117 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:31:55,540 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:31:55,540 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ed4c911-e434-496c-aa5c-c25bf0877bf3/sv-benchmarks/c/goblint-regression/28-race_reach_36-indirect_racefree.i [2023-11-12 02:31:55,570 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ed4c911-e434-496c-aa5c-c25bf0877bf3/bin/uautomizer-verify-uTZkv6EMXl/data/9d6487dd9/079e89760e61483e8791c34d545d81be/FLAG10758f7d6 [2023-11-12 02:31:55,583 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ed4c911-e434-496c-aa5c-c25bf0877bf3/bin/uautomizer-verify-uTZkv6EMXl/data/9d6487dd9/079e89760e61483e8791c34d545d81be [2023-11-12 02:31:55,586 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:31:55,588 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:31:55,595 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:31:55,597 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:31:55,603 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:31:55,603 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:31:55" (1/1) ... [2023-11-12 02:31:55,605 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43159b47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:31:55, skipping insertion in model container [2023-11-12 02:31:55,605 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:31:55" (1/1) ... [2023-11-12 02:31:55,672 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:31:56,070 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_6ed4c911-e434-496c-aa5c-c25bf0877bf3/sv-benchmarks/c/goblint-regression/28-race_reach_36-indirect_racefree.i[30176,30189] [2023-11-12 02:31:56,096 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:31:56,111 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:31:56,148 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_6ed4c911-e434-496c-aa5c-c25bf0877bf3/sv-benchmarks/c/goblint-regression/28-race_reach_36-indirect_racefree.i[30176,30189] [2023-11-12 02:31:56,157 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:31:56,230 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:31:56,230 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:31:56 WrapperNode [2023-11-12 02:31:56,231 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:31:56,232 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:31:56,232 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:31:56,233 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:31:56,241 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:31:56" (1/1) ... [2023-11-12 02:31:56,281 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:31:56" (1/1) ... [2023-11-12 02:31:56,325 INFO L138 Inliner]: procedures = 170, calls = 37, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 81 [2023-11-12 02:31:56,326 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:31:56,327 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:31:56,327 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:31:56,327 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:31:56,338 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:31:56" (1/1) ... [2023-11-12 02:31:56,338 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:31:56" (1/1) ... [2023-11-12 02:31:56,350 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:31:56" (1/1) ... [2023-11-12 02:31:56,351 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:31:56" (1/1) ... [2023-11-12 02:31:56,362 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:31:56" (1/1) ... [2023-11-12 02:31:56,375 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:31:56" (1/1) ... [2023-11-12 02:31:56,383 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:31:56" (1/1) ... [2023-11-12 02:31:56,390 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:31:56" (1/1) ... [2023-11-12 02:31:56,393 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:31:56,396 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:31:56,397 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:31:56,397 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:31:56,398 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:31:56" (1/1) ... [2023-11-12 02:31:56,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:31:56,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ed4c911-e434-496c-aa5c-c25bf0877bf3/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:31:56,444 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ed4c911-e434-496c-aa5c-c25bf0877bf3/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:31:56,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ed4c911-e434-496c-aa5c-c25bf0877bf3/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:31:56,494 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 02:31:56,495 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 02:31:56,495 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-12 02:31:56,496 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:31:56,496 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 02:31:56,496 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-12 02:31:56,497 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-12 02:31:56,497 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 02:31:56,497 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:31:56,497 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:31:56,498 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:31:56,499 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 02:31:56,699 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:31:56,702 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:31:56,927 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:31:56,937 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:31:56,937 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-11-12 02:31:56,940 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:31:56 BoogieIcfgContainer [2023-11-12 02:31:56,940 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:31:56,944 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:31:56,944 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:31:56,948 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:31:56,948 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:31:55" (1/3) ... [2023-11-12 02:31:56,949 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e72fa75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:31:56, skipping insertion in model container [2023-11-12 02:31:56,949 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:31:56" (2/3) ... [2023-11-12 02:31:56,950 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e72fa75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:31:56, skipping insertion in model container [2023-11-12 02:31:56,950 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:31:56" (3/3) ... [2023-11-12 02:31:56,951 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_36-indirect_racefree.i [2023-11-12 02:31:56,960 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-12 02:31:56,969 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:31:56,969 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 02:31:56,970 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-12 02:31:57,053 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-12 02:31:57,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 106 places, 115 transitions, 237 flow [2023-11-12 02:31:57,229 INFO L124 PetriNetUnfolderBase]: 17/155 cut-off events. [2023-11-12 02:31:57,233 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-12 02:31:57,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160 conditions, 155 events. 17/155 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 391 event pairs, 0 based on Foata normal form. 0/133 useless extension candidates. Maximal degree in co-relation 77. Up to 4 conditions per place. [2023-11-12 02:31:57,242 INFO L82 GeneralOperation]: Start removeDead. Operand has 106 places, 115 transitions, 237 flow [2023-11-12 02:31:57,247 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 102 places, 110 transitions, 224 flow [2023-11-12 02:31:57,251 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:31:57,275 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 102 places, 110 transitions, 224 flow [2023-11-12 02:31:57,285 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 102 places, 110 transitions, 224 flow [2023-11-12 02:31:57,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 102 places, 110 transitions, 224 flow [2023-11-12 02:31:57,388 INFO L124 PetriNetUnfolderBase]: 16/150 cut-off events. [2023-11-12 02:31:57,393 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:31:57,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154 conditions, 150 events. 16/150 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 369 event pairs, 0 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 77. Up to 4 conditions per place. [2023-11-12 02:31:57,403 INFO L119 LiptonReduction]: Number of co-enabled transitions 2944 [2023-11-12 02:32:01,477 INFO L134 LiptonReduction]: Checked pairs total: 5083 [2023-11-12 02:32:01,477 INFO L136 LiptonReduction]: Total number of compositions: 94 [2023-11-12 02:32:01,496 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:32:01,505 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;@17675e13, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:32:01,506 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-12 02:32:01,511 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:32:01,511 INFO L124 PetriNetUnfolderBase]: 0/10 cut-off events. [2023-11-12 02:32:01,511 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:32:01,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:32:01,513 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-12 02:32:01,513 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:32:01,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:32:01,521 INFO L85 PathProgramCache]: Analyzing trace with hash 13525855, now seen corresponding path program 1 times [2023-11-12 02:32:01,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:32:01,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844292638] [2023-11-12 02:32:01,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:32:01,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:32:01,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:32:01,871 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 02:32:01,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:32:01,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844292638] [2023-11-12 02:32:01,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844292638] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:32:01,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:32:01,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:32:01,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106352046] [2023-11-12 02:32:01,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:32:01,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:32:01,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:32:01,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:32:01,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:32:01,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 209 [2023-11-12 02:32:01,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 32 transitions, 68 flow. Second operand has 3 states, 3 states have (on average 96.33333333333333) internal successors, (289), 3 states have internal predecessors, (289), 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 02:32:01,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:32:01,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 209 [2023-11-12 02:32:01,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:32:02,150 INFO L124 PetriNetUnfolderBase]: 90/214 cut-off events. [2023-11-12 02:32:02,150 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:32:02,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 421 conditions, 214 events. 90/214 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 913 event pairs, 0 based on Foata normal form. 10/202 useless extension candidates. Maximal degree in co-relation 399. Up to 190 conditions per place. [2023-11-12 02:32:02,159 INFO L140 encePairwiseOnDemand]: 197/209 looper letters, 26 selfloop transitions, 2 changer transitions 4/34 dead transitions. [2023-11-12 02:32:02,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 34 transitions, 136 flow [2023-11-12 02:32:02,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:32:02,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:32:02,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 333 transitions. [2023-11-12 02:32:02,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5311004784688995 [2023-11-12 02:32:02,190 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 333 transitions. [2023-11-12 02:32:02,190 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 333 transitions. [2023-11-12 02:32:02,195 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:32:02,198 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 333 transitions. [2023-11-12 02:32:02,205 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 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 02:32:02,211 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 209.0) internal successors, (836), 4 states have internal predecessors, (836), 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 02:32:02,212 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 209.0) internal successors, (836), 4 states have internal predecessors, (836), 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 02:32:02,214 INFO L175 Difference]: Start difference. First operand has 27 places, 32 transitions, 68 flow. Second operand 3 states and 333 transitions. [2023-11-12 02:32:02,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 34 transitions, 136 flow [2023-11-12 02:32:02,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 34 transitions, 136 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-12 02:32:02,219 INFO L231 Difference]: Finished difference. Result has 29 places, 19 transitions, 50 flow [2023-11-12 02:32:02,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=209, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=29, PETRI_TRANSITIONS=19} [2023-11-12 02:32:02,227 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 2 predicate places. [2023-11-12 02:32:02,227 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 19 transitions, 50 flow [2023-11-12 02:32:02,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.33333333333333) internal successors, (289), 3 states have internal predecessors, (289), 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 02:32:02,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:32:02,228 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-12 02:32:02,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 02:32:02,229 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:32:02,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:32:02,231 INFO L85 PathProgramCache]: Analyzing trace with hash 106811732, now seen corresponding path program 1 times [2023-11-12 02:32:02,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:32:02,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824619559] [2023-11-12 02:32:02,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:32:02,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:32:02,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:32:02,304 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-12 02:32:02,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:32:02,394 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-12 02:32:02,395 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-12 02:32:02,397 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-12 02:32:02,400 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-12 02:32:02,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 02:32:02,401 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-12 02:32:02,406 WARN L234 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-12 02:32:02,406 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-12 02:32:02,449 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-12 02:32:02,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 135 places, 149 transitions, 314 flow [2023-11-12 02:32:02,515 INFO L124 PetriNetUnfolderBase]: 31/255 cut-off events. [2023-11-12 02:32:02,516 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-12 02:32:02,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 267 conditions, 255 events. 31/255 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 788 event pairs, 0 based on Foata normal form. 0/217 useless extension candidates. Maximal degree in co-relation 157. Up to 8 conditions per place. [2023-11-12 02:32:02,520 INFO L82 GeneralOperation]: Start removeDead. Operand has 135 places, 149 transitions, 314 flow [2023-11-12 02:32:02,523 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 135 places, 149 transitions, 314 flow [2023-11-12 02:32:02,523 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:32:02,524 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 135 places, 149 transitions, 314 flow [2023-11-12 02:32:02,525 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 135 places, 149 transitions, 314 flow [2023-11-12 02:32:02,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 135 places, 149 transitions, 314 flow [2023-11-12 02:32:02,566 INFO L124 PetriNetUnfolderBase]: 31/255 cut-off events. [2023-11-12 02:32:02,566 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-12 02:32:02,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 267 conditions, 255 events. 31/255 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 788 event pairs, 0 based on Foata normal form. 0/217 useless extension candidates. Maximal degree in co-relation 157. Up to 8 conditions per place. [2023-11-12 02:32:02,579 INFO L119 LiptonReduction]: Number of co-enabled transitions 8640 [2023-11-12 02:32:06,543 INFO L134 LiptonReduction]: Checked pairs total: 16643 [2023-11-12 02:32:06,544 INFO L136 LiptonReduction]: Total number of compositions: 113 [2023-11-12 02:32:06,548 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:32:06,557 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;@17675e13, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:32:06,557 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-12 02:32:06,561 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:32:06,561 INFO L124 PetriNetUnfolderBase]: 0/8 cut-off events. [2023-11-12 02:32:06,561 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:32:06,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:32:06,563 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-12 02:32:06,564 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:32:06,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:32:06,569 INFO L85 PathProgramCache]: Analyzing trace with hash 22635683, now seen corresponding path program 1 times [2023-11-12 02:32:06,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:32:06,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541123720] [2023-11-12 02:32:06,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:32:06,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:32:06,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:32:06,682 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 02:32:06,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:32:06,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541123720] [2023-11-12 02:32:06,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541123720] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:32:06,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:32:06,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:32:06,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796478229] [2023-11-12 02:32:06,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:32:06,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:32:06,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:32:06,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:32:06,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:32:06,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 262 [2023-11-12 02:32:06,703 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 02:32:06,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:32:06,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 262 [2023-11-12 02:32:06,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:32:07,214 INFO L124 PetriNetUnfolderBase]: 1642/2913 cut-off events. [2023-11-12 02:32:07,214 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-12 02:32:07,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5649 conditions, 2913 events. 1642/2913 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 17148 event pairs, 752 based on Foata normal form. 428/3024 useless extension candidates. Maximal degree in co-relation 585. Up to 2673 conditions per place. [2023-11-12 02:32:07,233 INFO L140 encePairwiseOnDemand]: 245/262 looper letters, 32 selfloop transitions, 2 changer transitions 9/51 dead transitions. [2023-11-12 02:32:07,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 51 transitions, 202 flow [2023-11-12 02:32:07,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:32:07,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:32:07,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 426 transitions. [2023-11-12 02:32:07,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5419847328244275 [2023-11-12 02:32:07,237 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 426 transitions. [2023-11-12 02:32:07,237 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 426 transitions. [2023-11-12 02:32:07,238 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:32:07,238 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 426 transitions. [2023-11-12 02:32:07,240 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 142.0) internal successors, (426), 3 states have internal predecessors, (426), 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 02:32:07,245 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 262.0) internal successors, (1048), 4 states have internal predecessors, (1048), 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 02:32:07,246 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 262.0) internal successors, (1048), 4 states have internal predecessors, (1048), 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 02:32:07,247 INFO L175 Difference]: Start difference. First operand has 44 places, 55 transitions, 126 flow. Second operand 3 states and 426 transitions. [2023-11-12 02:32:07,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 51 transitions, 202 flow [2023-11-12 02:32:07,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 51 transitions, 202 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-12 02:32:07,251 INFO L231 Difference]: Finished difference. Result has 47 places, 33 transitions, 86 flow [2023-11-12 02:32:07,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=262, 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=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=47, PETRI_TRANSITIONS=33} [2023-11-12 02:32:07,254 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2023-11-12 02:32:07,254 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 33 transitions, 86 flow [2023-11-12 02:32:07,255 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 02:32:07,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:32:07,256 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:32:07,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 02:32:07,256 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:32:07,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:32:07,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1918259616, now seen corresponding path program 1 times [2023-11-12 02:32:07,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:32:07,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581788522] [2023-11-12 02:32:07,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:32:07,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:32:07,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:32:07,393 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 02:32:07,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:32:07,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581788522] [2023-11-12 02:32:07,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581788522] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:32:07,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193984939] [2023-11-12 02:32:07,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:32:07,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:32:07,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ed4c911-e434-496c-aa5c-c25bf0877bf3/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:32:07,400 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ed4c911-e434-496c-aa5c-c25bf0877bf3/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:32:07,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ed4c911-e434-496c-aa5c-c25bf0877bf3/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:32:07,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:32:07,536 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 02:32:07,539 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:32:07,611 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 02:32:07,612 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:32:07,638 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 02:32:07,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193984939] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:32:07,638 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:32:07,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-12 02:32:07,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667745108] [2023-11-12 02:32:07,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:32:07,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:32:07,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:32:07,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:32:07,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:32:07,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 262 [2023-11-12 02:32:07,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 33 transitions, 86 flow. Second operand has 7 states, 7 states have (on average 122.28571428571429) internal successors, (856), 7 states have internal predecessors, (856), 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 02:32:07,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:32:07,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 262 [2023-11-12 02:32:07,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:32:07,906 INFO L124 PetriNetUnfolderBase]: 376/769 cut-off events. [2023-11-12 02:32:07,906 INFO L125 PetriNetUnfolderBase]: For 180/180 co-relation queries the response was YES. [2023-11-12 02:32:07,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1552 conditions, 769 events. 376/769 cut-off events. For 180/180 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 3917 event pairs, 0 based on Foata normal form. 90/858 useless extension candidates. Maximal degree in co-relation 172. Up to 450 conditions per place. [2023-11-12 02:32:07,955 INFO L140 encePairwiseOnDemand]: 259/262 looper letters, 45 selfloop transitions, 3 changer transitions 0/56 dead transitions. [2023-11-12 02:32:07,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 56 transitions, 226 flow [2023-11-12 02:32:07,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:32:07,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-12 02:32:07,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 650 transitions. [2023-11-12 02:32:07,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4961832061068702 [2023-11-12 02:32:07,960 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 650 transitions. [2023-11-12 02:32:07,960 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 650 transitions. [2023-11-12 02:32:07,961 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:32:07,961 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 650 transitions. [2023-11-12 02:32:07,963 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 130.0) internal successors, (650), 5 states have internal predecessors, (650), 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 02:32:07,967 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 262.0) internal successors, (1572), 6 states have internal predecessors, (1572), 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 02:32:07,969 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 262.0) internal successors, (1572), 6 states have internal predecessors, (1572), 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 02:32:07,969 INFO L175 Difference]: Start difference. First operand has 47 places, 33 transitions, 86 flow. Second operand 5 states and 650 transitions. [2023-11-12 02:32:07,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 56 transitions, 226 flow [2023-11-12 02:32:07,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 56 transitions, 224 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:32:07,974 INFO L231 Difference]: Finished difference. Result has 40 places, 30 transitions, 82 flow [2023-11-12 02:32:07,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=262, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=82, PETRI_PLACES=40, PETRI_TRANSITIONS=30} [2023-11-12 02:32:07,978 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -4 predicate places. [2023-11-12 02:32:07,978 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 30 transitions, 82 flow [2023-11-12 02:32:07,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 122.28571428571429) internal successors, (856), 7 states have internal predecessors, (856), 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 02:32:07,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:32:07,979 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-12 02:32:07,990 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ed4c911-e434-496c-aa5c-c25bf0877bf3/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-12 02:32:08,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ed4c911-e434-496c-aa5c-c25bf0877bf3/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:32:08,186 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:32:08,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:32:08,186 INFO L85 PathProgramCache]: Analyzing trace with hash -2068131703, now seen corresponding path program 1 times [2023-11-12 02:32:08,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:32:08,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447268837] [2023-11-12 02:32:08,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:32:08,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:32:08,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:32:08,224 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-12 02:32:08,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:32:08,277 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-12 02:32:08,277 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-12 02:32:08,278 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-12 02:32:08,278 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-12 02:32:08,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-12 02:32:08,278 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-12 02:32:08,279 WARN L234 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-12 02:32:08,280 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-12 02:32:08,326 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-12 02:32:08,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 164 places, 183 transitions, 393 flow [2023-11-12 02:32:08,411 INFO L124 PetriNetUnfolderBase]: 50/390 cut-off events. [2023-11-12 02:32:08,412 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-12 02:32:08,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 415 conditions, 390 events. 50/390 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1349 event pairs, 1 based on Foata normal form. 0/332 useless extension candidates. Maximal degree in co-relation 263. Up to 16 conditions per place. [2023-11-12 02:32:08,415 INFO L82 GeneralOperation]: Start removeDead. Operand has 164 places, 183 transitions, 393 flow [2023-11-12 02:32:08,420 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 164 places, 183 transitions, 393 flow [2023-11-12 02:32:08,421 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:32:08,421 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 164 places, 183 transitions, 393 flow [2023-11-12 02:32:08,421 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 164 places, 183 transitions, 393 flow [2023-11-12 02:32:08,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 164 places, 183 transitions, 393 flow [2023-11-12 02:32:08,485 INFO L124 PetriNetUnfolderBase]: 50/390 cut-off events. [2023-11-12 02:32:08,485 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-12 02:32:08,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 415 conditions, 390 events. 50/390 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1349 event pairs, 1 based on Foata normal form. 0/332 useless extension candidates. Maximal degree in co-relation 263. Up to 16 conditions per place. [2023-11-12 02:32:08,508 INFO L119 LiptonReduction]: Number of co-enabled transitions 16320 [2023-11-12 02:32:12,949 INFO L134 LiptonReduction]: Checked pairs total: 35283 [2023-11-12 02:32:12,949 INFO L136 LiptonReduction]: Total number of compositions: 135 [2023-11-12 02:32:12,954 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:32:12,965 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;@17675e13, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:32:12,966 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-12 02:32:12,968 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:32:12,968 INFO L124 PetriNetUnfolderBase]: 0/8 cut-off events. [2023-11-12 02:32:12,969 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:32:12,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:32:12,969 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-12 02:32:12,969 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:32:12,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:32:12,970 INFO L85 PathProgramCache]: Analyzing trace with hash 33472241, now seen corresponding path program 1 times [2023-11-12 02:32:12,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:32:12,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789568956] [2023-11-12 02:32:12,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:32:12,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:32:12,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:32:13,035 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 02:32:13,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:32:13,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789568956] [2023-11-12 02:32:13,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789568956] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:32:13,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:32:13,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:32:13,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089154419] [2023-11-12 02:32:13,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:32:13,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:32:13,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:32:13,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:32:13,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:32:13,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 318 [2023-11-12 02:32:13,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 74 transitions, 175 flow. Second operand has 3 states, 3 states have (on average 148.33333333333334) internal successors, (445), 3 states have internal predecessors, (445), 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 02:32:13,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:32:13,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 318 [2023-11-12 02:32:13,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:32:18,999 INFO L124 PetriNetUnfolderBase]: 32280/46608 cut-off events. [2023-11-12 02:32:18,999 INFO L125 PetriNetUnfolderBase]: For 1321/1321 co-relation queries the response was YES. [2023-11-12 02:32:19,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92756 conditions, 46608 events. 32280/46608 cut-off events. For 1321/1321 co-relation queries the response was YES. Maximal size of possible extension queue 1067. Compared 303507 event pairs, 21006 based on Foata normal form. 5103/47988 useless extension candidates. Maximal degree in co-relation 7949. Up to 45346 conditions per place. [2023-11-12 02:32:19,206 INFO L140 encePairwiseOnDemand]: 295/318 looper letters, 44 selfloop transitions, 2 changer transitions 10/64 dead transitions. [2023-11-12 02:32:19,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 64 transitions, 265 flow [2023-11-12 02:32:19,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:32:19,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:32:19,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 523 transitions. [2023-11-12 02:32:19,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5482180293501048 [2023-11-12 02:32:19,209 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 523 transitions. [2023-11-12 02:32:19,209 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 523 transitions. [2023-11-12 02:32:19,210 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:32:19,210 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 523 transitions. [2023-11-12 02:32:19,212 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 174.33333333333334) internal successors, (523), 3 states have internal predecessors, (523), 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 02:32:19,215 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 318.0) internal successors, (1272), 4 states have internal predecessors, (1272), 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 02:32:19,216 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 318.0) internal successors, (1272), 4 states have internal predecessors, (1272), 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 02:32:19,216 INFO L175 Difference]: Start difference. First operand has 58 places, 74 transitions, 175 flow. Second operand 3 states and 523 transitions. [2023-11-12 02:32:19,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 64 transitions, 265 flow [2023-11-12 02:32:19,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 64 transitions, 265 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-12 02:32:19,222 INFO L231 Difference]: Finished difference. Result has 61 places, 45 transitions, 118 flow [2023-11-12 02:32:19,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, 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=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=61, PETRI_TRANSITIONS=45} [2023-11-12 02:32:19,226 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 3 predicate places. [2023-11-12 02:32:19,226 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 45 transitions, 118 flow [2023-11-12 02:32:19,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 148.33333333333334) internal successors, (445), 3 states have internal predecessors, (445), 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 02:32:19,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:32:19,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:32:19,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-12 02:32:19,229 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:32:19,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:32:19,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1644638712, now seen corresponding path program 1 times [2023-11-12 02:32:19,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:32:19,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983357400] [2023-11-12 02:32:19,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:32:19,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:32:19,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:32:19,298 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 02:32:19,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:32:19,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983357400] [2023-11-12 02:32:19,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983357400] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:32:19,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022150020] [2023-11-12 02:32:19,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:32:19,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:32:19,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ed4c911-e434-496c-aa5c-c25bf0877bf3/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:32:19,301 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ed4c911-e434-496c-aa5c-c25bf0877bf3/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:32:19,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ed4c911-e434-496c-aa5c-c25bf0877bf3/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:32:19,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:32:19,391 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 02:32:19,392 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:32:19,409 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 02:32:19,409 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:32:19,432 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 02:32:19,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022150020] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:32:19,432 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:32:19,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-12 02:32:19,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222019391] [2023-11-12 02:32:19,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:32:19,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:32:19,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:32:19,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:32:19,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:32:19,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 318 [2023-11-12 02:32:19,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 45 transitions, 118 flow. Second operand has 7 states, 7 states have (on average 148.28571428571428) internal successors, (1038), 7 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:19,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:32:19,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 318 [2023-11-12 02:32:19,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:32:20,723 INFO L124 PetriNetUnfolderBase]: 7582/12187 cut-off events. [2023-11-12 02:32:20,723 INFO L125 PetriNetUnfolderBase]: For 4374/4374 co-relation queries the response was YES. [2023-11-12 02:32:20,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24605 conditions, 12187 events. 7582/12187 cut-off events. For 4374/4374 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 81392 event pairs, 0 based on Foata normal form. 1098/13285 useless extension candidates. Maximal degree in co-relation 2808. Up to 7322 conditions per place. [2023-11-12 02:32:20,789 INFO L140 encePairwiseOnDemand]: 315/318 looper letters, 87 selfloop transitions, 4 changer transitions 0/99 dead transitions. [2023-11-12 02:32:20,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 99 transitions, 408 flow [2023-11-12 02:32:20,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:32:20,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-12 02:32:20,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 970 transitions. [2023-11-12 02:32:20,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5083857442348009 [2023-11-12 02:32:20,901 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 970 transitions. [2023-11-12 02:32:20,901 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 970 transitions. [2023-11-12 02:32:20,902 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:32:20,902 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 970 transitions. [2023-11-12 02:32:20,905 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 161.66666666666666) internal successors, (970), 6 states have internal predecessors, (970), 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 02:32:20,924 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 318.0) internal successors, (2226), 7 states have internal predecessors, (2226), 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 02:32:20,927 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 318.0) internal successors, (2226), 7 states have internal predecessors, (2226), 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 02:32:20,928 INFO L175 Difference]: Start difference. First operand has 61 places, 45 transitions, 118 flow. Second operand 6 states and 970 transitions. [2023-11-12 02:32:20,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 99 transitions, 408 flow [2023-11-12 02:32:20,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 99 transitions, 404 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-12 02:32:20,937 INFO L231 Difference]: Finished difference. Result has 55 places, 43 transitions, 118 flow [2023-11-12 02:32:20,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=118, PETRI_PLACES=55, PETRI_TRANSITIONS=43} [2023-11-12 02:32:20,940 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, -3 predicate places. [2023-11-12 02:32:20,941 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 43 transitions, 118 flow [2023-11-12 02:32:20,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 148.28571428571428) internal successors, (1038), 7 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:20,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:32:20,942 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-11-12 02:32:20,949 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ed4c911-e434-496c-aa5c-c25bf0877bf3/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 02:32:21,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ed4c911-e434-496c-aa5c-c25bf0877bf3/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:32:21,147 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:32:21,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:32:21,148 INFO L85 PathProgramCache]: Analyzing trace with hash 943810224, now seen corresponding path program 1 times [2023-11-12 02:32:21,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:32:21,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655561396] [2023-11-12 02:32:21,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:32:21,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:32:21,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:32:21,177 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-12 02:32:21,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:32:21,211 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-12 02:32:21,211 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-12 02:32:21,211 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-12 02:32:21,212 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-12 02:32:21,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-12 02:32:21,212 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-12 02:32:21,214 WARN L234 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-12 02:32:21,214 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-12 02:32:21,261 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-12 02:32:21,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 193 places, 217 transitions, 474 flow [2023-11-12 02:32:21,397 INFO L124 PetriNetUnfolderBase]: 81/597 cut-off events. [2023-11-12 02:32:21,397 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-12 02:32:21,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 648 conditions, 597 events. 81/597 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2359 event pairs, 6 based on Foata normal form. 0/511 useless extension candidates. Maximal degree in co-relation 410. Up to 32 conditions per place. [2023-11-12 02:32:21,402 INFO L82 GeneralOperation]: Start removeDead. Operand has 193 places, 217 transitions, 474 flow [2023-11-12 02:32:21,408 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 193 places, 217 transitions, 474 flow [2023-11-12 02:32:21,408 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:32:21,408 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 193 places, 217 transitions, 474 flow [2023-11-12 02:32:21,409 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 193 places, 217 transitions, 474 flow [2023-11-12 02:32:21,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 193 places, 217 transitions, 474 flow [2023-11-12 02:32:21,531 INFO L124 PetriNetUnfolderBase]: 81/597 cut-off events. [2023-11-12 02:32:21,531 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-12 02:32:21,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 648 conditions, 597 events. 81/597 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2359 event pairs, 6 based on Foata normal form. 0/511 useless extension candidates. Maximal degree in co-relation 410. Up to 32 conditions per place. [2023-11-12 02:32:21,565 INFO L119 LiptonReduction]: Number of co-enabled transitions 26240 [2023-11-12 02:32:25,822 INFO L134 LiptonReduction]: Checked pairs total: 59024 [2023-11-12 02:32:25,822 INFO L136 LiptonReduction]: Total number of compositions: 153 [2023-11-12 02:32:25,824 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:32:25,824 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;@17675e13, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:32:25,824 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-12 02:32:25,827 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:32:25,827 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2023-11-12 02:32:25,827 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:32:25,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:32:25,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-12 02:32:25,828 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:32:25,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:32:25,828 INFO L85 PathProgramCache]: Analyzing trace with hash 45909599, now seen corresponding path program 1 times [2023-11-12 02:32:25,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:32:25,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710867827] [2023-11-12 02:32:25,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:32:25,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:32:25,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:32:25,869 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 02:32:25,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:32:25,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710867827] [2023-11-12 02:32:25,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710867827] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:32:25,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:32:25,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:32:25,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579290391] [2023-11-12 02:32:25,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:32:25,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:32:25,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:32:25,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:32:25,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:32:25,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 370 [2023-11-12 02:32:25,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 93 transitions, 226 flow. Second operand has 3 states, 3 states have (on average 174.33333333333334) internal successors, (523), 3 states have internal predecessors, (523), 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 02:32:25,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:32:25,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 370 [2023-11-12 02:32:25,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand