./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/parallel-misc-3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff 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_40d304df-46a4-435c-92ee-1f3445812104/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d304df-46a4-435c-92ee-1f3445812104/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d304df-46a4-435c-92ee-1f3445812104/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d304df-46a4-435c-92ee-1f3445812104/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/parallel-misc-3.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d304df-46a4-435c-92ee-1f3445812104/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d304df-46a4-435c-92ee-1f3445812104/bin/uautomizer-verify-uCwYo4JHxu --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 206fc494d359c55f00dca0f227d0ffa61103c97cbe34d3166496eff2224a478a --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:55:57,927 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:55:58,019 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d304df-46a4-435c-92ee-1f3445812104/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:55:58,028 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:55:58,029 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:55:58,074 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:55:58,075 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:55:58,075 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:55:58,076 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:55:58,081 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:55:58,082 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:55:58,082 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:55:58,083 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:55:58,084 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:55:58,085 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:55:58,085 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:55:58,086 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:55:58,086 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:55:58,086 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:55:58,087 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:55:58,087 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:55:58,092 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:55:58,093 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:55:58,093 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:55:58,094 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:55:58,095 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:55:58,095 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:55:58,095 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:55:58,096 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:55:58,096 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:55:58,097 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:55:58,098 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:55:58,098 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:55:58,098 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:55:58,098 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:55:58,098 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:55:58,099 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:55:58,099 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:55:58,099 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:55:58,099 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_40d304df-46a4-435c-92ee-1f3445812104/bin/uautomizer-verify-uCwYo4JHxu/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d304df-46a4-435c-92ee-1f3445812104/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 206fc494d359c55f00dca0f227d0ffa61103c97cbe34d3166496eff2224a478a [2023-11-19 07:55:58,408 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:55:58,457 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:55:58,460 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:55:58,462 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:55:58,462 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:55:58,464 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d304df-46a4-435c-92ee-1f3445812104/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/weaver/parallel-misc-3.wvr.c [2023-11-19 07:56:01,606 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:56:01,848 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:56:01,849 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d304df-46a4-435c-92ee-1f3445812104/sv-benchmarks/c/weaver/parallel-misc-3.wvr.c [2023-11-19 07:56:01,858 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d304df-46a4-435c-92ee-1f3445812104/bin/uautomizer-verify-uCwYo4JHxu/data/7c7693f41/e91a970bc46e4ba6a71b48976095e7f0/FLAG893976048 [2023-11-19 07:56:01,875 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d304df-46a4-435c-92ee-1f3445812104/bin/uautomizer-verify-uCwYo4JHxu/data/7c7693f41/e91a970bc46e4ba6a71b48976095e7f0 [2023-11-19 07:56:01,878 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:56:01,886 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:56:01,889 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:56:01,890 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:56:01,896 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:56:01,899 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:56:01" (1/1) ... [2023-11-19 07:56:01,900 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63477471 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:01, skipping insertion in model container [2023-11-19 07:56:01,901 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:56:01" (1/1) ... [2023-11-19 07:56:01,932 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:56:02,181 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_40d304df-46a4-435c-92ee-1f3445812104/sv-benchmarks/c/weaver/parallel-misc-3.wvr.c[2436,2449] [2023-11-19 07:56:02,187 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:56:02,200 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:56:02,244 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_40d304df-46a4-435c-92ee-1f3445812104/sv-benchmarks/c/weaver/parallel-misc-3.wvr.c[2436,2449] [2023-11-19 07:56:02,247 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:56:02,260 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:56:02,261 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:56:02,270 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:56:02,271 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:02 WrapperNode [2023-11-19 07:56:02,271 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:56:02,277 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:56:02,277 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:56:02,277 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:56:02,285 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:02" (1/1) ... [2023-11-19 07:56:02,291 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:02" (1/1) ... [2023-11-19 07:56:02,309 INFO L138 Inliner]: procedures = 21, calls = 27, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 52 [2023-11-19 07:56:02,309 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:56:02,310 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:56:02,310 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:56:02,310 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:56:02,320 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:02" (1/1) ... [2023-11-19 07:56:02,321 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:02" (1/1) ... [2023-11-19 07:56:02,327 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:02" (1/1) ... [2023-11-19 07:56:02,327 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:02" (1/1) ... [2023-11-19 07:56:02,337 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:02" (1/1) ... [2023-11-19 07:56:02,342 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:02" (1/1) ... [2023-11-19 07:56:02,343 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:02" (1/1) ... [2023-11-19 07:56:02,345 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:02" (1/1) ... [2023-11-19 07:56:02,347 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:56:02,348 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:56:02,349 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:56:02,349 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:56:02,350 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:02" (1/1) ... [2023-11-19 07:56:02,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:56:02,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d304df-46a4-435c-92ee-1f3445812104/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:56:02,379 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d304df-46a4-435c-92ee-1f3445812104/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:56:02,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d304df-46a4-435c-92ee-1f3445812104/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:56:02,415 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:56:02,415 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-19 07:56:02,415 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-19 07:56:02,416 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-19 07:56:02,416 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-19 07:56:02,416 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:56:02,416 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:56:02,416 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:56:02,416 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-19 07:56:02,417 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-19 07:56:02,417 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:56:02,417 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:56:02,417 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:56:02,417 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:56:02,419 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-19 07:56:02,523 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:56:02,525 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:56:02,759 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:56:02,788 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:56:02,788 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-19 07:56:02,792 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:56:02 BoogieIcfgContainer [2023-11-19 07:56:02,793 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:56:02,796 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:56:02,796 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:56:02,800 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:56:02,801 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:56:01" (1/3) ... [2023-11-19 07:56:02,801 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fe07e4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:56:02, skipping insertion in model container [2023-11-19 07:56:02,802 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:02" (2/3) ... [2023-11-19 07:56:02,802 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fe07e4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:56:02, skipping insertion in model container [2023-11-19 07:56:02,802 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:56:02" (3/3) ... [2023-11-19 07:56:02,804 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-misc-3.wvr.c [2023-11-19 07:56:02,814 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-19 07:56:02,827 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:56:02,828 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:56:02,828 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:56:02,916 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-19 07:56:02,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 91 places, 95 transitions, 204 flow [2023-11-19 07:56:03,061 INFO L124 PetriNetUnfolderBase]: 11/93 cut-off events. [2023-11-19 07:56:03,061 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:56:03,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102 conditions, 93 events. 11/93 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 105 event pairs, 0 based on Foata normal form. 0/81 useless extension candidates. Maximal degree in co-relation 49. Up to 4 conditions per place. [2023-11-19 07:56:03,068 INFO L82 GeneralOperation]: Start removeDead. Operand has 91 places, 95 transitions, 204 flow [2023-11-19 07:56:03,073 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 80 places, 84 transitions, 180 flow [2023-11-19 07:56:03,078 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:56:03,088 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 80 places, 84 transitions, 180 flow [2023-11-19 07:56:03,091 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 80 places, 84 transitions, 180 flow [2023-11-19 07:56:03,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 80 places, 84 transitions, 180 flow [2023-11-19 07:56:03,123 INFO L124 PetriNetUnfolderBase]: 11/84 cut-off events. [2023-11-19 07:56:03,123 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:56:03,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93 conditions, 84 events. 11/84 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 102 event pairs, 0 based on Foata normal form. 0/73 useless extension candidates. Maximal degree in co-relation 49. Up to 4 conditions per place. [2023-11-19 07:56:03,127 INFO L119 LiptonReduction]: Number of co-enabled transitions 1292 [2023-11-19 07:56:06,570 INFO L134 LiptonReduction]: Checked pairs total: 1230 [2023-11-19 07:56:06,570 INFO L136 LiptonReduction]: Total number of compositions: 81 [2023-11-19 07:56:06,596 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:56:06,607 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;@3370eb84, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:56:06,607 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-19 07:56:06,620 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:56:06,621 INFO L124 PetriNetUnfolderBase]: 2/14 cut-off events. [2023-11-19 07:56:06,621 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:56:06,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:56:06,622 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:56:06,623 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:56:06,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:56:06,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1327132555, now seen corresponding path program 1 times [2023-11-19 07:56:06,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:56:06,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612871721] [2023-11-19 07:56:06,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:06,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:56:06,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:06,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:56:06,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:56:06,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612871721] [2023-11-19 07:56:06,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612871721] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:56:06,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:56:06,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:56:06,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857286080] [2023-11-19 07:56:06,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:56:07,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:56:07,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:56:07,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:56:07,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:56:07,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 176 [2023-11-19 07:56:07,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 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) [2023-11-19 07:56:07,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:56:07,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 176 [2023-11-19 07:56:07,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:56:07,159 INFO L124 PetriNetUnfolderBase]: 65/114 cut-off events. [2023-11-19 07:56:07,159 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-11-19 07:56:07,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 246 conditions, 114 events. 65/114 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 320 event pairs, 9 based on Foata normal form. 1/74 useless extension candidates. Maximal degree in co-relation 179. Up to 85 conditions per place. [2023-11-19 07:56:07,164 INFO L140 encePairwiseOnDemand]: 172/176 looper letters, 19 selfloop transitions, 3 changer transitions 1/25 dead transitions. [2023-11-19 07:56:07,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 25 transitions, 117 flow [2023-11-19 07:56:07,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:56:07,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:56:07,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 270 transitions. [2023-11-19 07:56:07,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5113636363636364 [2023-11-19 07:56:07,193 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 270 transitions. [2023-11-19 07:56:07,193 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 270 transitions. [2023-11-19 07:56:07,197 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:56:07,200 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 270 transitions. [2023-11-19 07:56:07,207 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 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) [2023-11-19 07:56:07,212 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 176.0) internal successors, (704), 4 states have internal predecessors, (704), 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) [2023-11-19 07:56:07,213 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 176.0) internal successors, (704), 4 states have internal predecessors, (704), 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) [2023-11-19 07:56:07,215 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 3 states and 270 transitions. [2023-11-19 07:56:07,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 25 transitions, 117 flow [2023-11-19 07:56:07,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 25 transitions, 103 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-19 07:56:07,221 INFO L231 Difference]: Finished difference. Result has 19 places, 17 transitions, 53 flow [2023-11-19 07:56:07,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=53, PETRI_PLACES=19, PETRI_TRANSITIONS=17} [2023-11-19 07:56:07,229 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, -1 predicate places. [2023-11-19 07:56:07,230 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 17 transitions, 53 flow [2023-11-19 07:56:07,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 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) [2023-11-19 07:56:07,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:56:07,231 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:56:07,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:56:07,232 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:56:07,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:56:07,233 INFO L85 PathProgramCache]: Analyzing trace with hash 155155731, now seen corresponding path program 1 times [2023-11-19 07:56:07,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:56:07,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173404518] [2023-11-19 07:56:07,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:07,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:56:07,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:07,374 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:56:07,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:56:07,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173404518] [2023-11-19 07:56:07,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173404518] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:56:07,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:56:07,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:56:07,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795922369] [2023-11-19 07:56:07,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:56:07,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:56:07,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:56:07,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:56:07,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:56:07,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 176 [2023-11-19 07:56:07,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 17 transitions, 53 flow. Second operand has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 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) [2023-11-19 07:56:07,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:56:07,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 176 [2023-11-19 07:56:07,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:56:07,451 INFO L124 PetriNetUnfolderBase]: 49/86 cut-off events. [2023-11-19 07:56:07,452 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-19 07:56:07,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 222 conditions, 86 events. 49/86 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 200 event pairs, 7 based on Foata normal form. 9/92 useless extension candidates. Maximal degree in co-relation 62. Up to 69 conditions per place. [2023-11-19 07:56:07,453 INFO L140 encePairwiseOnDemand]: 173/176 looper letters, 18 selfloop transitions, 3 changer transitions 0/23 dead transitions. [2023-11-19 07:56:07,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 23 transitions, 112 flow [2023-11-19 07:56:07,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:56:07,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:56:07,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 263 transitions. [2023-11-19 07:56:07,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4981060606060606 [2023-11-19 07:56:07,456 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 263 transitions. [2023-11-19 07:56:07,456 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 263 transitions. [2023-11-19 07:56:07,456 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:56:07,457 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 263 transitions. [2023-11-19 07:56:07,458 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 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) [2023-11-19 07:56:07,460 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 176.0) internal successors, (704), 4 states have internal predecessors, (704), 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) [2023-11-19 07:56:07,461 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 176.0) internal successors, (704), 4 states have internal predecessors, (704), 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) [2023-11-19 07:56:07,461 INFO L175 Difference]: Start difference. First operand has 19 places, 17 transitions, 53 flow. Second operand 3 states and 263 transitions. [2023-11-19 07:56:07,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 23 transitions, 112 flow [2023-11-19 07:56:07,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 23 transitions, 107 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-19 07:56:07,463 INFO L231 Difference]: Finished difference. Result has 21 places, 18 transitions, 65 flow [2023-11-19 07:56:07,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=65, PETRI_PLACES=21, PETRI_TRANSITIONS=18} [2023-11-19 07:56:07,465 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 1 predicate places. [2023-11-19 07:56:07,465 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 18 transitions, 65 flow [2023-11-19 07:56:07,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 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) [2023-11-19 07:56:07,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:56:07,469 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:56:07,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:56:07,470 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:56:07,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:56:07,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1543426384, now seen corresponding path program 1 times [2023-11-19 07:56:07,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:56:07,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928096007] [2023-11-19 07:56:07,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:07,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:56:07,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:07,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:56:07,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:56:07,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928096007] [2023-11-19 07:56:07,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928096007] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:56:07,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:56:07,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:56:07,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931147278] [2023-11-19 07:56:07,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:56:07,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:56:07,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:56:07,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:56:07,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:56:07,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 176 [2023-11-19 07:56:07,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 18 transitions, 65 flow. Second operand has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 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) [2023-11-19 07:56:07,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:56:07,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 176 [2023-11-19 07:56:07,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:56:07,721 INFO L124 PetriNetUnfolderBase]: 40/76 cut-off events. [2023-11-19 07:56:07,722 INFO L125 PetriNetUnfolderBase]: For 54/54 co-relation queries the response was YES. [2023-11-19 07:56:07,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 224 conditions, 76 events. 40/76 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 164 event pairs, 6 based on Foata normal form. 6/79 useless extension candidates. Maximal degree in co-relation 143. Up to 49 conditions per place. [2023-11-19 07:56:07,726 INFO L140 encePairwiseOnDemand]: 173/176 looper letters, 19 selfloop transitions, 3 changer transitions 0/24 dead transitions. [2023-11-19 07:56:07,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 24 transitions, 130 flow [2023-11-19 07:56:07,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:56:07,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:56:07,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 263 transitions. [2023-11-19 07:56:07,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4981060606060606 [2023-11-19 07:56:07,728 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 263 transitions. [2023-11-19 07:56:07,729 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 263 transitions. [2023-11-19 07:56:07,729 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:56:07,729 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 263 transitions. [2023-11-19 07:56:07,731 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 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) [2023-11-19 07:56:07,734 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 176.0) internal successors, (704), 4 states have internal predecessors, (704), 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) [2023-11-19 07:56:07,735 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 176.0) internal successors, (704), 4 states have internal predecessors, (704), 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) [2023-11-19 07:56:07,735 INFO L175 Difference]: Start difference. First operand has 21 places, 18 transitions, 65 flow. Second operand 3 states and 263 transitions. [2023-11-19 07:56:07,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 24 transitions, 130 flow [2023-11-19 07:56:07,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 24 transitions, 127 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:56:07,738 INFO L231 Difference]: Finished difference. Result has 23 places, 19 transitions, 79 flow [2023-11-19 07:56:07,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=79, PETRI_PLACES=23, PETRI_TRANSITIONS=19} [2023-11-19 07:56:07,740 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 3 predicate places. [2023-11-19 07:56:07,744 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 19 transitions, 79 flow [2023-11-19 07:56:07,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 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) [2023-11-19 07:56:07,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:56:07,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:56:07,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 07:56:07,746 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:56:07,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:56:07,747 INFO L85 PathProgramCache]: Analyzing trace with hash -22977474, now seen corresponding path program 1 times [2023-11-19 07:56:07,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:56:07,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042100884] [2023-11-19 07:56:07,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:07,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:56:07,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:08,122 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:56:08,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:56:08,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042100884] [2023-11-19 07:56:08,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042100884] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:56:08,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405534390] [2023-11-19 07:56:08,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:08,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:56:08,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d304df-46a4-435c-92ee-1f3445812104/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:56:08,126 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d304df-46a4-435c-92ee-1f3445812104/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:56:08,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d304df-46a4-435c-92ee-1f3445812104/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:56:08,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:08,233 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:56:08,239 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:56:08,349 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:56:08,349 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:56:08,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:56:08,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405534390] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:56:08,677 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:56:08,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-11-19 07:56:08,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676046477] [2023-11-19 07:56:08,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:56:08,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:56:08,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:56:08,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:56:08,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:56:08,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 176 [2023-11-19 07:56:08,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 19 transitions, 79 flow. Second operand has 8 states, 8 states have (on average 68.375) internal successors, (547), 8 states have internal predecessors, (547), 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) [2023-11-19 07:56:08,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:56:08,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 176 [2023-11-19 07:56:08,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:56:08,963 INFO L124 PetriNetUnfolderBase]: 65/118 cut-off events. [2023-11-19 07:56:08,964 INFO L125 PetriNetUnfolderBase]: For 79/79 co-relation queries the response was YES. [2023-11-19 07:56:08,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 398 conditions, 118 events. 65/118 cut-off events. For 79/79 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 274 event pairs, 0 based on Foata normal form. 20/136 useless extension candidates. Maximal degree in co-relation 126. Up to 61 conditions per place. [2023-11-19 07:56:08,970 INFO L140 encePairwiseOnDemand]: 171/176 looper letters, 40 selfloop transitions, 18 changer transitions 0/60 dead transitions. [2023-11-19 07:56:08,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 60 transitions, 353 flow [2023-11-19 07:56:08,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-19 07:56:08,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-19 07:56:08,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 897 transitions. [2023-11-19 07:56:08,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39204545454545453 [2023-11-19 07:56:08,976 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 897 transitions. [2023-11-19 07:56:08,976 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 897 transitions. [2023-11-19 07:56:08,977 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:56:08,978 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 897 transitions. [2023-11-19 07:56:08,981 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 69.0) internal successors, (897), 13 states have internal predecessors, (897), 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) [2023-11-19 07:56:08,987 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 176.0) internal successors, (2464), 14 states have internal predecessors, (2464), 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) [2023-11-19 07:56:08,990 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 176.0) internal successors, (2464), 14 states have internal predecessors, (2464), 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) [2023-11-19 07:56:08,990 INFO L175 Difference]: Start difference. First operand has 23 places, 19 transitions, 79 flow. Second operand 13 states and 897 transitions. [2023-11-19 07:56:08,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 60 transitions, 353 flow [2023-11-19 07:56:08,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 60 transitions, 349 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:56:08,995 INFO L231 Difference]: Finished difference. Result has 40 places, 31 transitions, 222 flow [2023-11-19 07:56:08,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=222, PETRI_PLACES=40, PETRI_TRANSITIONS=31} [2023-11-19 07:56:08,997 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 20 predicate places. [2023-11-19 07:56:08,998 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 31 transitions, 222 flow [2023-11-19 07:56:08,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 68.375) internal successors, (547), 8 states have internal predecessors, (547), 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) [2023-11-19 07:56:08,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:56:09,002 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:56:09,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d304df-46a4-435c-92ee-1f3445812104/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:56:09,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d304df-46a4-435c-92ee-1f3445812104/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:56:09,213 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:56:09,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:56:09,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1823923329, now seen corresponding path program 2 times [2023-11-19 07:56:09,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:56:09,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470319647] [2023-11-19 07:56:09,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:09,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:56:09,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:10,072 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:56:10,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:56:10,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470319647] [2023-11-19 07:56:10,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470319647] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:56:10,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723176168] [2023-11-19 07:56:10,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:56:10,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:56:10,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d304df-46a4-435c-92ee-1f3445812104/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:56:10,075 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d304df-46a4-435c-92ee-1f3445812104/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:56:10,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d304df-46a4-435c-92ee-1f3445812104/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:56:10,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:56:10,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:56:10,167 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-19 07:56:10,172 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:56:10,855 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:56:10,856 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:56:11,621 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:56:11,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723176168] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:56:11,622 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:56:11,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 16 [2023-11-19 07:56:11,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322925948] [2023-11-19 07:56:11,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:56:11,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-19 07:56:11,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:56:11,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-19 07:56:11,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2023-11-19 07:56:11,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 176 [2023-11-19 07:56:11,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 31 transitions, 222 flow. Second operand has 18 states, 18 states have (on average 60.22222222222222) internal successors, (1084), 18 states have internal predecessors, (1084), 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) [2023-11-19 07:56:11,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:56:11,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 176 [2023-11-19 07:56:11,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:56:13,178 INFO L124 PetriNetUnfolderBase]: 331/590 cut-off events. [2023-11-19 07:56:13,178 INFO L125 PetriNetUnfolderBase]: For 1820/1820 co-relation queries the response was YES. [2023-11-19 07:56:13,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2983 conditions, 590 events. 331/590 cut-off events. For 1820/1820 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2458 event pairs, 0 based on Foata normal form. 12/600 useless extension candidates. Maximal degree in co-relation 1275. Up to 251 conditions per place. [2023-11-19 07:56:13,187 INFO L140 encePairwiseOnDemand]: 170/176 looper letters, 91 selfloop transitions, 98 changer transitions 42/233 dead transitions. [2023-11-19 07:56:13,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 233 transitions, 2017 flow [2023-11-19 07:56:13,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-19 07:56:13,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-11-19 07:56:13,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2181 transitions. [2023-11-19 07:56:13,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36447192513368987 [2023-11-19 07:56:13,197 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2181 transitions. [2023-11-19 07:56:13,197 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2181 transitions. [2023-11-19 07:56:13,199 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:56:13,200 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2181 transitions. [2023-11-19 07:56:13,208 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 64.1470588235294) internal successors, (2181), 34 states have internal predecessors, (2181), 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) [2023-11-19 07:56:13,220 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 176.0) internal successors, (6160), 35 states have internal predecessors, (6160), 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) [2023-11-19 07:56:13,223 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 176.0) internal successors, (6160), 35 states have internal predecessors, (6160), 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) [2023-11-19 07:56:13,223 INFO L175 Difference]: Start difference. First operand has 40 places, 31 transitions, 222 flow. Second operand 34 states and 2181 transitions. [2023-11-19 07:56:13,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 233 transitions, 2017 flow [2023-11-19 07:56:13,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 233 transitions, 1903 flow, removed 49 selfloop flow, removed 3 redundant places. [2023-11-19 07:56:13,242 INFO L231 Difference]: Finished difference. Result has 74 places, 117 transitions, 1288 flow [2023-11-19 07:56:13,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=1288, PETRI_PLACES=74, PETRI_TRANSITIONS=117} [2023-11-19 07:56:13,245 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 54 predicate places. [2023-11-19 07:56:13,248 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 117 transitions, 1288 flow [2023-11-19 07:56:13,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 60.22222222222222) internal successors, (1084), 18 states have internal predecessors, (1084), 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) [2023-11-19 07:56:13,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:56:13,250 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:56:13,276 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d304df-46a4-435c-92ee-1f3445812104/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:56:13,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d304df-46a4-435c-92ee-1f3445812104/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:56:13,472 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:56:13,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:56:13,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1411457791, now seen corresponding path program 3 times [2023-11-19 07:56:13,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:56:13,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416033327] [2023-11-19 07:56:13,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:13,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:56:13,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:14,353 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:56:14,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:56:14,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416033327] [2023-11-19 07:56:14,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416033327] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:56:14,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003636305] [2023-11-19 07:56:14,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 07:56:14,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:56:14,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d304df-46a4-435c-92ee-1f3445812104/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:56:14,357 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d304df-46a4-435c-92ee-1f3445812104/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:56:14,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d304df-46a4-435c-92ee-1f3445812104/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:56:14,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-19 07:56:14,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:56:14,456 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-19 07:56:14,459 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:56:14,745 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:56:14,745 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:56:15,458 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:56:15,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003636305] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:56:15,459 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:56:15,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-11-19 07:56:15,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254929861] [2023-11-19 07:56:15,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:56:15,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-19 07:56:15,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:56:15,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-19 07:56:15,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2023-11-19 07:56:15,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 176 [2023-11-19 07:56:15,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 117 transitions, 1288 flow. Second operand has 21 states, 21 states have (on average 59.76190476190476) internal successors, (1255), 21 states have internal predecessors, (1255), 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) [2023-11-19 07:56:15,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:56:15,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 176 [2023-11-19 07:56:15,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:56:17,245 INFO L124 PetriNetUnfolderBase]: 697/1173 cut-off events. [2023-11-19 07:56:17,245 INFO L125 PetriNetUnfolderBase]: For 4751/4751 co-relation queries the response was YES. [2023-11-19 07:56:17,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6962 conditions, 1173 events. 697/1173 cut-off events. For 4751/4751 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 5576 event pairs, 6 based on Foata normal form. 70/1241 useless extension candidates. Maximal degree in co-relation 6699. Up to 565 conditions per place. [2023-11-19 07:56:17,264 INFO L140 encePairwiseOnDemand]: 170/176 looper letters, 108 selfloop transitions, 263 changer transitions 27/400 dead transitions. [2023-11-19 07:56:17,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 400 transitions, 5064 flow [2023-11-19 07:56:17,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-19 07:56:17,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-19 07:56:17,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1719 transitions. [2023-11-19 07:56:17,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36174242424242425 [2023-11-19 07:56:17,273 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1719 transitions. [2023-11-19 07:56:17,273 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1719 transitions. [2023-11-19 07:56:17,275 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:56:17,275 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1719 transitions. [2023-11-19 07:56:17,282 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 63.666666666666664) internal successors, (1719), 27 states have internal predecessors, (1719), 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) [2023-11-19 07:56:17,292 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 176.0) internal successors, (4928), 28 states have internal predecessors, (4928), 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) [2023-11-19 07:56:17,294 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 176.0) internal successors, (4928), 28 states have internal predecessors, (4928), 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) [2023-11-19 07:56:17,294 INFO L175 Difference]: Start difference. First operand has 74 places, 117 transitions, 1288 flow. Second operand 27 states and 1719 transitions. [2023-11-19 07:56:17,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 400 transitions, 5064 flow [2023-11-19 07:56:17,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 400 transitions, 2636 flow, removed 1198 selfloop flow, removed 7 redundant places. [2023-11-19 07:56:17,347 INFO L231 Difference]: Finished difference. Result has 101 places, 321 transitions, 2468 flow [2023-11-19 07:56:17,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=584, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=2468, PETRI_PLACES=101, PETRI_TRANSITIONS=321} [2023-11-19 07:56:17,349 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 81 predicate places. [2023-11-19 07:56:17,349 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 321 transitions, 2468 flow [2023-11-19 07:56:17,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 59.76190476190476) internal successors, (1255), 21 states have internal predecessors, (1255), 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) [2023-11-19 07:56:17,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:56:17,350 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:56:17,379 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d304df-46a4-435c-92ee-1f3445812104/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:56:17,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d304df-46a4-435c-92ee-1f3445812104/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-19 07:56:17,551 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:56:17,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:56:17,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1126292889, now seen corresponding path program 4 times [2023-11-19 07:56:17,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:56:17,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661468423] [2023-11-19 07:56:17,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:17,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:56:17,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:18,340 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:56:18,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:56:18,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661468423] [2023-11-19 07:56:18,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661468423] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:56:18,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170084975] [2023-11-19 07:56:18,341 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 07:56:18,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:56:18,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d304df-46a4-435c-92ee-1f3445812104/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:56:18,346 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d304df-46a4-435c-92ee-1f3445812104/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:56:18,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d304df-46a4-435c-92ee-1f3445812104/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:56:18,441 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 07:56:18,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:56:18,443 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 07:56:18,447 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:56:19,567 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:56:19,567 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:56:20,092 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:56:20,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170084975] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:56:20,093 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:56:20,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2023-11-19 07:56:20,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23186986] [2023-11-19 07:56:20,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:56:20,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-19 07:56:20,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:56:20,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-19 07:56:20,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2023-11-19 07:56:20,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 176 [2023-11-19 07:56:20,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 321 transitions, 2468 flow. Second operand has 18 states, 18 states have (on average 59.77777777777778) internal successors, (1076), 18 states have internal predecessors, (1076), 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) [2023-11-19 07:56:20,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:56:20,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 176 [2023-11-19 07:56:20,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:56:22,639 INFO L124 PetriNetUnfolderBase]: 897/1549 cut-off events. [2023-11-19 07:56:22,639 INFO L125 PetriNetUnfolderBase]: For 1458/1458 co-relation queries the response was YES. [2023-11-19 07:56:22,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6453 conditions, 1549 events. 897/1549 cut-off events. For 1458/1458 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 8096 event pairs, 2 based on Foata normal form. 4/1497 useless extension candidates. Maximal degree in co-relation 6339. Up to 497 conditions per place. [2023-11-19 07:56:22,658 INFO L140 encePairwiseOnDemand]: 170/176 looper letters, 241 selfloop transitions, 295 changer transitions 10/548 dead transitions. [2023-11-19 07:56:22,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 548 transitions, 4945 flow [2023-11-19 07:56:22,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-19 07:56:22,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-19 07:56:22,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1711 transitions. [2023-11-19 07:56:22,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3600589225589226 [2023-11-19 07:56:22,670 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1711 transitions. [2023-11-19 07:56:22,670 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1711 transitions. [2023-11-19 07:56:22,672 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:56:22,672 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1711 transitions. [2023-11-19 07:56:22,678 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 63.370370370370374) internal successors, (1711), 27 states have internal predecessors, (1711), 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) [2023-11-19 07:56:22,689 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 176.0) internal successors, (4928), 28 states have internal predecessors, (4928), 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) [2023-11-19 07:56:22,692 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 176.0) internal successors, (4928), 28 states have internal predecessors, (4928), 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) [2023-11-19 07:56:22,692 INFO L175 Difference]: Start difference. First operand has 101 places, 321 transitions, 2468 flow. Second operand 27 states and 1711 transitions. [2023-11-19 07:56:22,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 548 transitions, 4945 flow [2023-11-19 07:56:22,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 548 transitions, 4495 flow, removed 184 selfloop flow, removed 8 redundant places. [2023-11-19 07:56:22,758 INFO L231 Difference]: Finished difference. Result has 130 places, 452 transitions, 4124 flow [2023-11-19 07:56:22,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=2173, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=4124, PETRI_PLACES=130, PETRI_TRANSITIONS=452} [2023-11-19 07:56:22,760 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 110 predicate places. [2023-11-19 07:56:22,760 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 452 transitions, 4124 flow [2023-11-19 07:56:22,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 59.77777777777778) internal successors, (1076), 18 states have internal predecessors, (1076), 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) [2023-11-19 07:56:22,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:56:22,761 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:56:22,783 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d304df-46a4-435c-92ee-1f3445812104/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-19 07:56:22,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d304df-46a4-435c-92ee-1f3445812104/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:56:22,977 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:56:22,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:56:22,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1580513047, now seen corresponding path program 5 times [2023-11-19 07:56:22,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:56:22,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008995178] [2023-11-19 07:56:22,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:22,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:56:23,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:23,693 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:56:23,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:56:23,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008995178] [2023-11-19 07:56:23,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008995178] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:56:23,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789765077] [2023-11-19 07:56:23,697 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-19 07:56:23,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:56:23,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d304df-46a4-435c-92ee-1f3445812104/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:56:23,701 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d304df-46a4-435c-92ee-1f3445812104/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:56:23,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d304df-46a4-435c-92ee-1f3445812104/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:56:23,803 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:56:23,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:56:23,805 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-19 07:56:23,808 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:56:24,057 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:56:24,058 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:56:24,632 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:56:24,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789765077] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:56:24,633 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:56:24,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 16 [2023-11-19 07:56:24,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519678772] [2023-11-19 07:56:24,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:56:24,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-19 07:56:24,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:56:24,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-19 07:56:24,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2023-11-19 07:56:24,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 176 [2023-11-19 07:56:24,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 452 transitions, 4124 flow. Second operand has 18 states, 18 states have (on average 60.05555555555556) internal successors, (1081), 18 states have internal predecessors, (1081), 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) [2023-11-19 07:56:24,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:56:24,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 176 [2023-11-19 07:56:24,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:56:28,125 INFO L124 PetriNetUnfolderBase]: 1950/3192 cut-off events. [2023-11-19 07:56:28,125 INFO L125 PetriNetUnfolderBase]: For 4157/4157 co-relation queries the response was YES. [2023-11-19 07:56:28,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15325 conditions, 3192 events. 1950/3192 cut-off events. For 4157/4157 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 17804 event pairs, 12 based on Foata normal form. 138/3276 useless extension candidates. Maximal degree in co-relation 15183. Up to 843 conditions per place. [2023-11-19 07:56:28,167 INFO L140 encePairwiseOnDemand]: 170/176 looper letters, 166 selfloop transitions, 881 changer transitions 82/1131 dead transitions. [2023-11-19 07:56:28,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 1131 transitions, 11932 flow [2023-11-19 07:56:28,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-11-19 07:56:28,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-11-19 07:56:28,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2658 transitions. [2023-11-19 07:56:28,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35957792207792205 [2023-11-19 07:56:28,176 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 2658 transitions. [2023-11-19 07:56:28,176 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 2658 transitions. [2023-11-19 07:56:28,181 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:56:28,181 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 2658 transitions. [2023-11-19 07:56:28,190 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 63.285714285714285) internal successors, (2658), 42 states have internal predecessors, (2658), 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) [2023-11-19 07:56:28,205 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 176.0) internal successors, (7568), 43 states have internal predecessors, (7568), 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) [2023-11-19 07:56:28,208 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 176.0) internal successors, (7568), 43 states have internal predecessors, (7568), 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) [2023-11-19 07:56:28,208 INFO L175 Difference]: Start difference. First operand has 130 places, 452 transitions, 4124 flow. Second operand 42 states and 2658 transitions. [2023-11-19 07:56:28,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 1131 transitions, 11932 flow [2023-11-19 07:56:28,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 1131 transitions, 11708 flow, removed 98 selfloop flow, removed 5 redundant places. [2023-11-19 07:56:28,363 INFO L231 Difference]: Finished difference. Result has 182 places, 972 transitions, 11166 flow [2023-11-19 07:56:28,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=3757, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=358, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=11166, PETRI_PLACES=182, PETRI_TRANSITIONS=972} [2023-11-19 07:56:28,366 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 162 predicate places. [2023-11-19 07:56:28,367 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 972 transitions, 11166 flow [2023-11-19 07:56:28,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 60.05555555555556) internal successors, (1081), 18 states have internal predecessors, (1081), 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) [2023-11-19 07:56:28,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:56:28,368 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:56:28,393 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d304df-46a4-435c-92ee-1f3445812104/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 07:56:28,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d304df-46a4-435c-92ee-1f3445812104/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:56:28,589 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:56:28,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:56:28,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1939751547, now seen corresponding path program 6 times [2023-11-19 07:56:28,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:56:28,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767445476] [2023-11-19 07:56:28,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:28,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:56:28,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:29,185 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:56:29,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:56:29,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767445476] [2023-11-19 07:56:29,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767445476] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:56:29,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254244090] [2023-11-19 07:56:29,186 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-19 07:56:29,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:56:29,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d304df-46a4-435c-92ee-1f3445812104/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:56:29,188 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d304df-46a4-435c-92ee-1f3445812104/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:56:29,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d304df-46a4-435c-92ee-1f3445812104/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 07:56:29,283 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-19 07:56:29,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:56:29,284 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 07:56:29,287 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:56:29,386 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:56:29,386 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:56:29,610 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:56:29,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254244090] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:56:29,610 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:56:29,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 11 [2023-11-19 07:56:29,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812315589] [2023-11-19 07:56:29,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:56:29,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 07:56:29,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:56:29,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 07:56:29,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-11-19 07:56:29,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 176 [2023-11-19 07:56:29,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 972 transitions, 11166 flow. Second operand has 12 states, 12 states have (on average 76.08333333333333) internal successors, (913), 12 states have internal predecessors, (913), 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) [2023-11-19 07:56:29,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:56:29,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 176 [2023-11-19 07:56:29,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:56:30,687 INFO L124 PetriNetUnfolderBase]: 1501/2465 cut-off events. [2023-11-19 07:56:30,688 INFO L125 PetriNetUnfolderBase]: For 5558/5558 co-relation queries the response was YES. [2023-11-19 07:56:30,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13848 conditions, 2465 events. 1501/2465 cut-off events. For 5558/5558 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 13164 event pairs, 32 based on Foata normal form. 258/2714 useless extension candidates. Maximal degree in co-relation 13695. Up to 948 conditions per place. [2023-11-19 07:56:30,724 INFO L140 encePairwiseOnDemand]: 173/176 looper letters, 360 selfloop transitions, 375 changer transitions 98/835 dead transitions. [2023-11-19 07:56:30,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 835 transitions, 10849 flow [2023-11-19 07:56:30,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:56:30,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 07:56:30,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 466 transitions. [2023-11-19 07:56:30,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4412878787878788 [2023-11-19 07:56:30,727 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 466 transitions. [2023-11-19 07:56:30,727 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 466 transitions. [2023-11-19 07:56:30,727 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:56:30,727 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 466 transitions. [2023-11-19 07:56:30,729 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 77.66666666666667) internal successors, (466), 6 states have internal predecessors, (466), 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) [2023-11-19 07:56:30,731 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 176.0) internal successors, (1232), 7 states have internal predecessors, (1232), 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) [2023-11-19 07:56:30,732 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 176.0) internal successors, (1232), 7 states have internal predecessors, (1232), 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) [2023-11-19 07:56:30,732 INFO L175 Difference]: Start difference. First operand has 182 places, 972 transitions, 11166 flow. Second operand 6 states and 466 transitions. [2023-11-19 07:56:30,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 835 transitions, 10849 flow [2023-11-19 07:56:30,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 835 transitions, 9829 flow, removed 328 selfloop flow, removed 17 redundant places. [2023-11-19 07:56:30,957 INFO L231 Difference]: Finished difference. Result has 160 places, 724 transitions, 7706 flow [2023-11-19 07:56:30,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=8080, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=821, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=375, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7706, PETRI_PLACES=160, PETRI_TRANSITIONS=724} [2023-11-19 07:56:30,959 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 140 predicate places. [2023-11-19 07:56:30,959 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 724 transitions, 7706 flow [2023-11-19 07:56:30,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 76.08333333333333) internal successors, (913), 12 states have internal predecessors, (913), 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) [2023-11-19 07:56:30,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:56:30,960 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:56:30,981 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d304df-46a4-435c-92ee-1f3445812104/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 07:56:31,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d304df-46a4-435c-92ee-1f3445812104/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:56:31,177 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:56:31,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:56:31,177 INFO L85 PathProgramCache]: Analyzing trace with hash -662261478, now seen corresponding path program 7 times [2023-11-19 07:56:31,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:56:31,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356994103] [2023-11-19 07:56:31,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:31,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:56:31,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:32,006 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:56:32,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:56:32,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356994103] [2023-11-19 07:56:32,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356994103] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:56:32,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753652834] [2023-11-19 07:56:32,007 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-19 07:56:32,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:56:32,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d304df-46a4-435c-92ee-1f3445812104/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:56:32,008 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d304df-46a4-435c-92ee-1f3445812104/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:56:32,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d304df-46a4-435c-92ee-1f3445812104/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 07:56:32,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:32,111 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-19 07:56:32,114 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:56:32,269 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 07:56:32,270 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:56:32,546 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 07:56:32,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753652834] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:56:32,546 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:56:32,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 14 [2023-11-19 07:56:32,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062205369] [2023-11-19 07:56:32,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:56:32,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-19 07:56:32,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:56:32,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-19 07:56:32,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2023-11-19 07:56:32,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 176 [2023-11-19 07:56:32,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 724 transitions, 7706 flow. Second operand has 15 states, 15 states have (on average 75.53333333333333) internal successors, (1133), 15 states have internal predecessors, (1133), 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) [2023-11-19 07:56:32,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:56:32,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 176 [2023-11-19 07:56:32,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:56:33,151 INFO L124 PetriNetUnfolderBase]: 985/1612 cut-off events. [2023-11-19 07:56:33,151 INFO L125 PetriNetUnfolderBase]: For 2614/2614 co-relation queries the response was YES. [2023-11-19 07:56:33,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8827 conditions, 1612 events. 985/1612 cut-off events. For 2614/2614 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 8024 event pairs, 6 based on Foata normal form. 126/1736 useless extension candidates. Maximal degree in co-relation 8793. Up to 813 conditions per place. [2023-11-19 07:56:33,168 INFO L140 encePairwiseOnDemand]: 173/176 looper letters, 0 selfloop transitions, 0 changer transitions 621/621 dead transitions. [2023-11-19 07:56:33,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 621 transitions, 7685 flow [2023-11-19 07:56:33,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:56:33,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 07:56:33,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 464 transitions. [2023-11-19 07:56:33,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4393939393939394 [2023-11-19 07:56:33,171 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 464 transitions. [2023-11-19 07:56:33,171 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 464 transitions. [2023-11-19 07:56:33,171 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:56:33,171 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 464 transitions. [2023-11-19 07:56:33,172 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 77.33333333333333) internal successors, (464), 6 states have internal predecessors, (464), 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) [2023-11-19 07:56:33,174 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 176.0) internal successors, (1232), 7 states have internal predecessors, (1232), 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) [2023-11-19 07:56:33,175 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 176.0) internal successors, (1232), 7 states have internal predecessors, (1232), 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) [2023-11-19 07:56:33,175 INFO L175 Difference]: Start difference. First operand has 160 places, 724 transitions, 7706 flow. Second operand 6 states and 464 transitions. [2023-11-19 07:56:33,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 621 transitions, 7685 flow [2023-11-19 07:56:33,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 621 transitions, 6921 flow, removed 30 selfloop flow, removed 12 redundant places. [2023-11-19 07:56:33,255 INFO L231 Difference]: Finished difference. Result has 137 places, 0 transitions, 0 flow [2023-11-19 07:56:33,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=5667, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=614, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=614, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=137, PETRI_TRANSITIONS=0} [2023-11-19 07:56:33,256 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 117 predicate places. [2023-11-19 07:56:33,257 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 0 transitions, 0 flow [2023-11-19 07:56:33,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 75.53333333333333) internal successors, (1133), 15 states have internal predecessors, (1133), 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) [2023-11-19 07:56:33,260 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-11-19 07:56:33,260 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-11-19 07:56:33,261 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-11-19 07:56:33,293 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d304df-46a4-435c-92ee-1f3445812104/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 07:56:33,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d304df-46a4-435c-92ee-1f3445812104/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:56:33,482 INFO L445 BasicCegarLoop]: Path program histogram: [7, 1, 1, 1] [2023-11-19 07:56:33,486 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-19 07:56:33,486 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-19 07:56:33,491 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 07:56:33 BasicIcfg [2023-11-19 07:56:33,492 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-19 07:56:33,492 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-19 07:56:33,492 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-19 07:56:33,493 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-19 07:56:33,493 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:56:02" (3/4) ... [2023-11-19 07:56:33,495 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-11-19 07:56:33,500 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2023-11-19 07:56:33,500 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2023-11-19 07:56:33,505 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2023-11-19 07:56:33,506 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2023-11-19 07:56:33,506 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2023-11-19 07:56:33,506 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-11-19 07:56:33,595 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d304df-46a4-435c-92ee-1f3445812104/bin/uautomizer-verify-uCwYo4JHxu/witness.graphml [2023-11-19 07:56:33,596 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d304df-46a4-435c-92ee-1f3445812104/bin/uautomizer-verify-uCwYo4JHxu/witness.yml [2023-11-19 07:56:33,596 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-19 07:56:33,597 INFO L158 Benchmark]: Toolchain (without parser) took 31717.62ms. Allocated memory was 161.5MB in the beginning and 474.0MB in the end (delta: 312.5MB). Free memory was 113.7MB in the beginning and 438.4MB in the end (delta: -324.7MB). Peak memory consumption was 270.9MB. Max. memory is 16.1GB. [2023-11-19 07:56:33,597 INFO L158 Benchmark]: CDTParser took 0.34ms. Allocated memory is still 161.5MB. Free memory was 130.2MB in the beginning and 130.1MB in the end (delta: 29.5kB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-19 07:56:33,598 INFO L158 Benchmark]: CACSL2BoogieTranslator took 386.50ms. Allocated memory is still 161.5MB. Free memory was 113.7MB in the beginning and 101.9MB in the end (delta: 11.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-11-19 07:56:33,598 INFO L158 Benchmark]: Boogie Procedure Inliner took 32.68ms. Allocated memory is still 161.5MB. Free memory was 101.9MB in the beginning and 100.7MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-19 07:56:33,599 INFO L158 Benchmark]: Boogie Preprocessor took 37.69ms. Allocated memory is still 161.5MB. Free memory was 100.7MB in the beginning and 99.3MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-19 07:56:33,599 INFO L158 Benchmark]: RCFGBuilder took 444.26ms. Allocated memory is still 161.5MB. Free memory was 99.1MB in the beginning and 85.1MB in the end (delta: 13.9MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2023-11-19 07:56:33,599 INFO L158 Benchmark]: TraceAbstraction took 30695.91ms. Allocated memory was 161.5MB in the beginning and 474.0MB in the end (delta: 312.5MB). Free memory was 84.4MB in the beginning and 162.4MB in the end (delta: -78.0MB). Peak memory consumption was 237.1MB. Max. memory is 16.1GB. [2023-11-19 07:56:33,600 INFO L158 Benchmark]: Witness Printer took 104.09ms. Allocated memory is still 474.0MB. Free memory was 162.4MB in the beginning and 438.4MB in the end (delta: -276.0MB). Peak memory consumption was 4.5MB. Max. memory is 16.1GB. [2023-11-19 07:56:33,602 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34ms. Allocated memory is still 161.5MB. Free memory was 130.2MB in the beginning and 130.1MB in the end (delta: 29.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 386.50ms. Allocated memory is still 161.5MB. Free memory was 113.7MB in the beginning and 101.9MB in the end (delta: 11.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 32.68ms. Allocated memory is still 161.5MB. Free memory was 101.9MB in the beginning and 100.7MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 37.69ms. Allocated memory is still 161.5MB. Free memory was 100.7MB in the beginning and 99.3MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 444.26ms. Allocated memory is still 161.5MB. Free memory was 99.1MB in the beginning and 85.1MB in the end (delta: 13.9MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 30695.91ms. Allocated memory was 161.5MB in the beginning and 474.0MB in the end (delta: 312.5MB). Free memory was 84.4MB in the beginning and 162.4MB in the end (delta: -78.0MB). Peak memory consumption was 237.1MB. Max. memory is 16.1GB. * Witness Printer took 104.09ms. Allocated memory is still 474.0MB. Free memory was 162.4MB in the beginning and 438.4MB in the end (delta: -276.0MB). Peak memory consumption was 4.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.5s, 80 PlacesBefore, 20 PlacesAfterwards, 84 TransitionsBefore, 15 TransitionsAfterwards, 1292 CoEnabledTransitionPairs, 6 FixpointIterations, 29 TrivialSequentialCompositions, 34 ConcurrentSequentialCompositions, 3 TrivialYvCompositions, 6 ConcurrentYvCompositions, 9 ChoiceCompositions, 81 TotalNumberOfCompositions, 1230 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1197, independent: 1191, independent conditional: 0, independent unconditional: 1191, dependent: 6, dependent conditional: 0, dependent unconditional: 6, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 693, independent: 689, independent conditional: 0, independent unconditional: 689, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1197, independent: 502, independent conditional: 0, independent unconditional: 502, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 693, unknown conditional: 0, unknown unconditional: 693] , Statistics on independence cache: Total cache size (in pairs): 19, Positive cache size: 19, Positive conditional cache size: 0, Positive unconditional cache size: 19, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 101]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 117 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 30.5s, OverallIterations: 10, TraceHistogramMax: 5, PathProgramHistogramMax: 7, EmptinessCheckTime: 0.0s, AutomataDifference: 12.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.6s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1251 SdHoareTripleChecker+Valid, 3.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1192 mSDsluCounter, 230 SdHoareTripleChecker+Invalid, 2.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 227 mSDsCounter, 447 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2718 IncrementalHoareTripleChecker+Invalid, 3165 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 447 mSolverCounterUnsat, 3 mSDtfsCounter, 2718 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 375 GetRequests, 170 SyntacticMatches, 3 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2038 ImplicationChecksByTransitivity, 6.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=11166occurred in iteration=8, InterpolantAutomatonStates: 164, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 11.2s InterpolantComputationTime, 283 NumberOfCodeBlocks, 283 NumberOfCodeBlocksAsserted, 24 NumberOfCheckSat, 380 ConstructedInterpolants, 0 QuantifiedInterpolants, 3708 SizeOfPredicates, 37 NumberOfNonLiveVariables, 842 ConjunctsInSsa, 82 ConjunctsInUnsatCore, 24 InterpolantComputations, 3 PerfectInterpolantSequences, 24/161 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-11-19 07:56:33,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d304df-46a4-435c-92ee-1f3445812104/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE