./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/parallel-misc-2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66492b99-3a94-4004-8249-cc06e683b41a/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66492b99-3a94-4004-8249-cc06e683b41a/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66492b99-3a94-4004-8249-cc06e683b41a/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66492b99-3a94-4004-8249-cc06e683b41a/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/parallel-misc-2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66492b99-3a94-4004-8249-cc06e683b41a/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66492b99-3a94-4004-8249-cc06e683b41a/bin/uautomizer-verify-BQ2R08f2Ya --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 387afe7095db5eeb3a9188bc3fe181fa803bb62f73944f6d781c5c9340fce39e --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 00:25:06,683 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 00:25:06,745 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66492b99-3a94-4004-8249-cc06e683b41a/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 00:25:06,750 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 00:25:06,751 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 00:25:06,774 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 00:25:06,775 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 00:25:06,775 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 00:25:06,776 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 00:25:06,776 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 00:25:06,777 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 00:25:06,777 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 00:25:06,778 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 00:25:06,779 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 00:25:06,779 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 00:25:06,780 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 00:25:06,780 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 00:25:06,781 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 00:25:06,781 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 00:25:06,782 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 00:25:06,782 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 00:25:06,783 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 00:25:06,783 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 00:25:06,784 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 00:25:06,784 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 00:25:06,785 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 00:25:06,785 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 00:25:06,786 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 00:25:06,786 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 00:25:06,786 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 00:25:06,787 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 00:25:06,787 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:25:06,787 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 00:25:06,788 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 00:25:06,788 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 00:25:06,788 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 00:25:06,788 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 00:25:06,789 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 00:25:06,789 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 00:25:06,789 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 00:25:06,789 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 00:25:06,789 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 00:25:06,789 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_66492b99-3a94-4004-8249-cc06e683b41a/bin/uautomizer-verify-BQ2R08f2Ya/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66492b99-3a94-4004-8249-cc06e683b41a/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 387afe7095db5eeb3a9188bc3fe181fa803bb62f73944f6d781c5c9340fce39e [2023-11-29 00:25:07,003 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 00:25:07,023 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 00:25:07,026 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 00:25:07,027 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 00:25:07,027 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 00:25:07,028 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66492b99-3a94-4004-8249-cc06e683b41a/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/parallel-misc-2.wvr.c [2023-11-29 00:25:09,817 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 00:25:09,998 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 00:25:09,999 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66492b99-3a94-4004-8249-cc06e683b41a/sv-benchmarks/c/weaver/parallel-misc-2.wvr.c [2023-11-29 00:25:10,006 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66492b99-3a94-4004-8249-cc06e683b41a/bin/uautomizer-verify-BQ2R08f2Ya/data/a2dab4af9/8200bdcd304046338df2ead57b995ee8/FLAGedb9faef3 [2023-11-29 00:25:10,020 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66492b99-3a94-4004-8249-cc06e683b41a/bin/uautomizer-verify-BQ2R08f2Ya/data/a2dab4af9/8200bdcd304046338df2ead57b995ee8 [2023-11-29 00:25:10,023 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 00:25:10,024 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 00:25:10,025 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 00:25:10,026 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 00:25:10,031 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 00:25:10,032 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:25:10" (1/1) ... [2023-11-29 00:25:10,033 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68b83636 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:25:10, skipping insertion in model container [2023-11-29 00:25:10,033 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:25:10" (1/1) ... [2023-11-29 00:25:10,056 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 00:25:10,226 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_66492b99-3a94-4004-8249-cc06e683b41a/sv-benchmarks/c/weaver/parallel-misc-2.wvr.c[2580,2593] [2023-11-29 00:25:10,232 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:25:10,242 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 00:25:10,264 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_66492b99-3a94-4004-8249-cc06e683b41a/sv-benchmarks/c/weaver/parallel-misc-2.wvr.c[2580,2593] [2023-11-29 00:25:10,265 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:25:10,274 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 00:25:10,274 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 00:25:10,281 INFO L206 MainTranslator]: Completed translation [2023-11-29 00:25:10,282 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:25:10 WrapperNode [2023-11-29 00:25:10,282 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 00:25:10,283 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 00:25:10,283 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 00:25:10,283 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 00:25:10,291 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:25:10" (1/1) ... [2023-11-29 00:25:10,298 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:25:10" (1/1) ... [2023-11-29 00:25:10,319 INFO L138 Inliner]: procedures = 21, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 71 [2023-11-29 00:25:10,319 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 00:25:10,320 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 00:25:10,320 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 00:25:10,320 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 00:25:10,331 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:25:10" (1/1) ... [2023-11-29 00:25:10,332 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:25:10" (1/1) ... [2023-11-29 00:25:10,334 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:25:10" (1/1) ... [2023-11-29 00:25:10,349 INFO L175 MemorySlicer]: Split 6 memory accesses to 3 slices as follows [2, 2, 2]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2023-11-29 00:25:10,349 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:25:10" (1/1) ... [2023-11-29 00:25:10,350 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:25:10" (1/1) ... [2023-11-29 00:25:10,355 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:25:10" (1/1) ... [2023-11-29 00:25:10,359 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:25:10" (1/1) ... [2023-11-29 00:25:10,361 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:25:10" (1/1) ... [2023-11-29 00:25:10,362 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:25:10" (1/1) ... [2023-11-29 00:25:10,364 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 00:25:10,366 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 00:25:10,366 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 00:25:10,366 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 00:25:10,367 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:25:10" (1/1) ... [2023-11-29 00:25:10,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:25:10,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66492b99-3a94-4004-8249-cc06e683b41a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:25:10,396 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66492b99-3a94-4004-8249-cc06e683b41a/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 00:25:10,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66492b99-3a94-4004-8249-cc06e683b41a/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 00:25:10,424 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 00:25:10,424 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-29 00:25:10,425 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-29 00:25:10,425 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-29 00:25:10,425 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-29 00:25:10,425 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 00:25:10,425 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 00:25:10,425 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 00:25:10,425 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 00:25:10,426 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 00:25:10,426 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 00:25:10,426 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 00:25:10,426 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-29 00:25:10,426 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-29 00:25:10,426 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 00:25:10,426 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 00:25:10,427 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 00:25:10,427 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 00:25:10,427 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 00:25:10,427 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 00:25:10,428 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-29 00:25:10,527 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 00:25:10,529 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 00:25:10,723 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 00:25:10,862 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 00:25:10,862 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-29 00:25:10,863 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:25:10 BoogieIcfgContainer [2023-11-29 00:25:10,863 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 00:25:10,866 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 00:25:10,866 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 00:25:10,869 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 00:25:10,869 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 12:25:10" (1/3) ... [2023-11-29 00:25:10,870 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d5a3d77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:25:10, skipping insertion in model container [2023-11-29 00:25:10,870 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:25:10" (2/3) ... [2023-11-29 00:25:10,870 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d5a3d77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:25:10, skipping insertion in model container [2023-11-29 00:25:10,871 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:25:10" (3/3) ... [2023-11-29 00:25:10,872 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-misc-2.wvr.c [2023-11-29 00:25:10,880 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-29 00:25:10,891 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 00:25:10,891 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 00:25:10,891 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 00:25:10,931 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-29 00:25:10,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 32 places, 29 transitions, 72 flow [2023-11-29 00:25:10,992 INFO L124 PetriNetUnfolderBase]: 4/27 cut-off events. [2023-11-29 00:25:10,992 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-29 00:25:10,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36 conditions, 27 events. 4/27 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 44 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 21. Up to 2 conditions per place. [2023-11-29 00:25:10,995 INFO L82 GeneralOperation]: Start removeDead. Operand has 32 places, 29 transitions, 72 flow [2023-11-29 00:25:10,999 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 29 places, 26 transitions, 64 flow [2023-11-29 00:25:11,010 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 00:25:11,017 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;@181a576, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 00:25:11,017 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-29 00:25:11,028 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 00:25:11,028 INFO L124 PetriNetUnfolderBase]: 4/25 cut-off events. [2023-11-29 00:25:11,029 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-29 00:25:11,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:25:11,029 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:25:11,030 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 00:25:11,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:25:11,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1683761517, now seen corresponding path program 1 times [2023-11-29 00:25:11,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:25:11,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327050196] [2023-11-29 00:25:11,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:25:11,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:25:11,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:25:11,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:25:11,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:25:11,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327050196] [2023-11-29 00:25:11,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327050196] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:25:11,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:25:11,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:25:11,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704451639] [2023-11-29 00:25:11,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:25:11,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:25:11,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:25:11,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:25:11,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:25:11,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2023-11-29 00:25:11,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 26 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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) [2023-11-29 00:25:11,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:25:11,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2023-11-29 00:25:11,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:25:11,549 INFO L124 PetriNetUnfolderBase]: 140/271 cut-off events. [2023-11-29 00:25:11,549 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2023-11-29 00:25:11,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 499 conditions, 271 events. 140/271 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1045 event pairs, 13 based on Foata normal form. 1/230 useless extension candidates. Maximal degree in co-relation 404. Up to 178 conditions per place. [2023-11-29 00:25:11,555 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 23 selfloop transitions, 5 changer transitions 1/38 dead transitions. [2023-11-29 00:25:11,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 38 transitions, 155 flow [2023-11-29 00:25:11,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:25:11,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 00:25:11,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 63 transitions. [2023-11-29 00:25:11,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7241379310344828 [2023-11-29 00:25:11,568 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 63 transitions. [2023-11-29 00:25:11,569 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 63 transitions. [2023-11-29 00:25:11,570 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:25:11,572 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 63 transitions. [2023-11-29 00:25:11,574 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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) [2023-11-29 00:25:11,578 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 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) [2023-11-29 00:25:11,578 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 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) [2023-11-29 00:25:11,580 INFO L175 Difference]: Start difference. First operand has 29 places, 26 transitions, 64 flow. Second operand 3 states and 63 transitions. [2023-11-29 00:25:11,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 38 transitions, 155 flow [2023-11-29 00:25:11,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 38 transitions, 141 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-29 00:25:11,586 INFO L231 Difference]: Finished difference. Result has 28 places, 30 transitions, 89 flow [2023-11-29 00:25:11,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=89, PETRI_PLACES=28, PETRI_TRANSITIONS=30} [2023-11-29 00:25:11,591 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -1 predicate places. [2023-11-29 00:25:11,591 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 30 transitions, 89 flow [2023-11-29 00:25:11,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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) [2023-11-29 00:25:11,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:25:11,592 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:25:11,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 00:25:11,592 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 00:25:11,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:25:11,593 INFO L85 PathProgramCache]: Analyzing trace with hash -547186125, now seen corresponding path program 1 times [2023-11-29 00:25:11,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:25:11,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138322426] [2023-11-29 00:25:11,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:25:11,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:25:11,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:25:11,761 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:25:11,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:25:11,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138322426] [2023-11-29 00:25:11,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138322426] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:25:11,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:25:11,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:25:11,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718265649] [2023-11-29 00:25:11,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:25:11,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:25:11,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:25:11,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:25:11,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:25:11,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2023-11-29 00:25:11,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 30 transitions, 89 flow. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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) [2023-11-29 00:25:11,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:25:11,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2023-11-29 00:25:11,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:25:11,943 INFO L124 PetriNetUnfolderBase]: 183/337 cut-off events. [2023-11-29 00:25:11,943 INFO L125 PetriNetUnfolderBase]: For 49/49 co-relation queries the response was YES. [2023-11-29 00:25:11,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 716 conditions, 337 events. 183/337 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1409 event pairs, 17 based on Foata normal form. 0/248 useless extension candidates. Maximal degree in co-relation 358. Up to 129 conditions per place. [2023-11-29 00:25:11,948 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 37 selfloop transitions, 9 changer transitions 3/60 dead transitions. [2023-11-29 00:25:11,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 60 transitions, 262 flow [2023-11-29 00:25:11,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 00:25:11,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 00:25:11,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 103 transitions. [2023-11-29 00:25:11,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7103448275862069 [2023-11-29 00:25:11,951 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 103 transitions. [2023-11-29 00:25:11,951 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 103 transitions. [2023-11-29 00:25:11,952 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:25:11,952 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 103 transitions. [2023-11-29 00:25:11,953 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 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) [2023-11-29 00:25:11,954 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 29.0) internal successors, (174), 6 states have internal predecessors, (174), 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) [2023-11-29 00:25:11,954 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 29.0) internal successors, (174), 6 states have internal predecessors, (174), 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) [2023-11-29 00:25:11,955 INFO L175 Difference]: Start difference. First operand has 28 places, 30 transitions, 89 flow. Second operand 5 states and 103 transitions. [2023-11-29 00:25:11,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 60 transitions, 262 flow [2023-11-29 00:25:11,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 60 transitions, 255 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 00:25:11,958 INFO L231 Difference]: Finished difference. Result has 34 places, 37 transitions, 141 flow [2023-11-29 00:25:11,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=141, PETRI_PLACES=34, PETRI_TRANSITIONS=37} [2023-11-29 00:25:11,959 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 5 predicate places. [2023-11-29 00:25:11,959 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 37 transitions, 141 flow [2023-11-29 00:25:11,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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) [2023-11-29 00:25:11,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:25:11,960 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:25:11,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 00:25:11,960 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 00:25:11,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:25:11,961 INFO L85 PathProgramCache]: Analyzing trace with hash 995437461, now seen corresponding path program 2 times [2023-11-29 00:25:11,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:25:11,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520948704] [2023-11-29 00:25:11,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:25:11,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:25:11,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:25:12,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:25:12,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:25:12,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520948704] [2023-11-29 00:25:12,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520948704] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:25:12,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:25:12,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:25:12,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502371441] [2023-11-29 00:25:12,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:25:12,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:25:12,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:25:12,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:25:12,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:25:12,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2023-11-29 00:25:12,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 37 transitions, 141 flow. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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) [2023-11-29 00:25:12,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:25:12,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2023-11-29 00:25:12,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:25:12,317 INFO L124 PetriNetUnfolderBase]: 172/354 cut-off events. [2023-11-29 00:25:12,318 INFO L125 PetriNetUnfolderBase]: For 215/219 co-relation queries the response was YES. [2023-11-29 00:25:12,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 887 conditions, 354 events. 172/354 cut-off events. For 215/219 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1581 event pairs, 13 based on Foata normal form. 18/332 useless extension candidates. Maximal degree in co-relation 248. Up to 86 conditions per place. [2023-11-29 00:25:12,323 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 41 selfloop transitions, 12 changer transitions 3/67 dead transitions. [2023-11-29 00:25:12,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 67 transitions, 359 flow [2023-11-29 00:25:12,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 00:25:12,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 00:25:12,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 105 transitions. [2023-11-29 00:25:12,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7241379310344828 [2023-11-29 00:25:12,326 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 105 transitions. [2023-11-29 00:25:12,326 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 105 transitions. [2023-11-29 00:25:12,326 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:25:12,327 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 105 transitions. [2023-11-29 00:25:12,328 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 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) [2023-11-29 00:25:12,329 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 29.0) internal successors, (174), 6 states have internal predecessors, (174), 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) [2023-11-29 00:25:12,329 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 29.0) internal successors, (174), 6 states have internal predecessors, (174), 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) [2023-11-29 00:25:12,329 INFO L175 Difference]: Start difference. First operand has 34 places, 37 transitions, 141 flow. Second operand 5 states and 105 transitions. [2023-11-29 00:25:12,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 67 transitions, 359 flow [2023-11-29 00:25:12,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 67 transitions, 359 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-29 00:25:12,334 INFO L231 Difference]: Finished difference. Result has 42 places, 42 transitions, 227 flow [2023-11-29 00:25:12,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=227, PETRI_PLACES=42, PETRI_TRANSITIONS=42} [2023-11-29 00:25:12,335 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 13 predicate places. [2023-11-29 00:25:12,335 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 42 transitions, 227 flow [2023-11-29 00:25:12,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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) [2023-11-29 00:25:12,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:25:12,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:25:12,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 00:25:12,336 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 00:25:12,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:25:12,337 INFO L85 PathProgramCache]: Analyzing trace with hash 267782639, now seen corresponding path program 1 times [2023-11-29 00:25:12,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:25:12,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949107543] [2023-11-29 00:25:12,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:25:12,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:25:12,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:25:12,450 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:25:12,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:25:12,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949107543] [2023-11-29 00:25:12,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949107543] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:25:12,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:25:12,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:25:12,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946794568] [2023-11-29 00:25:12,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:25:12,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:25:12,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:25:12,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:25:12,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:25:12,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2023-11-29 00:25:12,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 42 transitions, 227 flow. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 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) [2023-11-29 00:25:12,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:25:12,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2023-11-29 00:25:12,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:25:12,616 INFO L124 PetriNetUnfolderBase]: 169/337 cut-off events. [2023-11-29 00:25:12,616 INFO L125 PetriNetUnfolderBase]: For 644/668 co-relation queries the response was YES. [2023-11-29 00:25:12,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1123 conditions, 337 events. 169/337 cut-off events. For 644/668 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1474 event pairs, 17 based on Foata normal form. 12/310 useless extension candidates. Maximal degree in co-relation 333. Up to 158 conditions per place. [2023-11-29 00:25:12,621 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 45 selfloop transitions, 8 changer transitions 4/68 dead transitions. [2023-11-29 00:25:12,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 68 transitions, 447 flow [2023-11-29 00:25:12,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 00:25:12,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 00:25:12,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 102 transitions. [2023-11-29 00:25:12,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7034482758620689 [2023-11-29 00:25:12,623 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 102 transitions. [2023-11-29 00:25:12,623 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 102 transitions. [2023-11-29 00:25:12,623 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:25:12,623 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 102 transitions. [2023-11-29 00:25:12,624 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 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) [2023-11-29 00:25:12,625 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 29.0) internal successors, (174), 6 states have internal predecessors, (174), 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) [2023-11-29 00:25:12,625 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 29.0) internal successors, (174), 6 states have internal predecessors, (174), 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) [2023-11-29 00:25:12,625 INFO L175 Difference]: Start difference. First operand has 42 places, 42 transitions, 227 flow. Second operand 5 states and 102 transitions. [2023-11-29 00:25:12,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 68 transitions, 447 flow [2023-11-29 00:25:12,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 68 transitions, 443 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-11-29 00:25:12,632 INFO L231 Difference]: Finished difference. Result has 48 places, 45 transitions, 274 flow [2023-11-29 00:25:12,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=274, PETRI_PLACES=48, PETRI_TRANSITIONS=45} [2023-11-29 00:25:12,633 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 19 predicate places. [2023-11-29 00:25:12,633 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 45 transitions, 274 flow [2023-11-29 00:25:12,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 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) [2023-11-29 00:25:12,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:25:12,634 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:25:12,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-29 00:25:12,634 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 00:25:12,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:25:12,635 INFO L85 PathProgramCache]: Analyzing trace with hash 840707637, now seen corresponding path program 2 times [2023-11-29 00:25:12,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:25:12,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114618459] [2023-11-29 00:25:12,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:25:12,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:25:12,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:25:12,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:25:12,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:25:12,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114618459] [2023-11-29 00:25:12,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114618459] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:25:12,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:25:12,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:25:12,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985233181] [2023-11-29 00:25:12,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:25:12,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:25:12,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:25:12,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:25:12,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:25:12,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2023-11-29 00:25:12,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 45 transitions, 274 flow. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 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) [2023-11-29 00:25:12,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:25:12,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2023-11-29 00:25:12,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:25:12,888 INFO L124 PetriNetUnfolderBase]: 155/328 cut-off events. [2023-11-29 00:25:12,888 INFO L125 PetriNetUnfolderBase]: For 660/668 co-relation queries the response was YES. [2023-11-29 00:25:12,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1085 conditions, 328 events. 155/328 cut-off events. For 660/668 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1324 event pairs, 15 based on Foata normal form. 16/308 useless extension candidates. Maximal degree in co-relation 769. Up to 91 conditions per place. [2023-11-29 00:25:12,893 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 41 selfloop transitions, 12 changer transitions 3/67 dead transitions. [2023-11-29 00:25:12,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 67 transitions, 490 flow [2023-11-29 00:25:12,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 00:25:12,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 00:25:12,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 98 transitions. [2023-11-29 00:25:12,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6758620689655173 [2023-11-29 00:25:12,894 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 98 transitions. [2023-11-29 00:25:12,895 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 98 transitions. [2023-11-29 00:25:12,895 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:25:12,895 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 98 transitions. [2023-11-29 00:25:12,895 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 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) [2023-11-29 00:25:12,896 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 29.0) internal successors, (174), 6 states have internal predecessors, (174), 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) [2023-11-29 00:25:12,896 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 29.0) internal successors, (174), 6 states have internal predecessors, (174), 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) [2023-11-29 00:25:12,897 INFO L175 Difference]: Start difference. First operand has 48 places, 45 transitions, 274 flow. Second operand 5 states and 98 transitions. [2023-11-29 00:25:12,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 67 transitions, 490 flow [2023-11-29 00:25:12,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 67 transitions, 474 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-29 00:25:12,903 INFO L231 Difference]: Finished difference. Result has 54 places, 48 transitions, 337 flow [2023-11-29 00:25:12,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=249, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=337, PETRI_PLACES=54, PETRI_TRANSITIONS=48} [2023-11-29 00:25:12,904 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 25 predicate places. [2023-11-29 00:25:12,904 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 48 transitions, 337 flow [2023-11-29 00:25:12,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 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) [2023-11-29 00:25:12,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:25:12,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:25:12,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-29 00:25:12,905 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 00:25:12,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:25:12,905 INFO L85 PathProgramCache]: Analyzing trace with hash -922958189, now seen corresponding path program 1 times [2023-11-29 00:25:12,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:25:12,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778202567] [2023-11-29 00:25:12,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:25:12,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:25:12,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:25:13,184 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:25:13,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:25:13,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778202567] [2023-11-29 00:25:13,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778202567] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:25:13,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482879700] [2023-11-29 00:25:13,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:25:13,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:25:13,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66492b99-3a94-4004-8249-cc06e683b41a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:25:13,190 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66492b99-3a94-4004-8249-cc06e683b41a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:25:13,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66492b99-3a94-4004-8249-cc06e683b41a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 00:25:13,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:25:13,297 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 00:25:13,302 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:25:13,441 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:25:13,442 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:25:13,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:25:13,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482879700] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:25:13,599 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:25:13,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 11 [2023-11-29 00:25:13,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921230661] [2023-11-29 00:25:13,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:25:13,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 00:25:13,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:25:13,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 00:25:13,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2023-11-29 00:25:13,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 29 [2023-11-29 00:25:13,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 48 transitions, 337 flow. Second operand has 12 states, 12 states have (on average 12.5) internal successors, (150), 12 states have internal predecessors, (150), 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) [2023-11-29 00:25:13,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:25:13,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 29 [2023-11-29 00:25:13,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:25:14,604 INFO L124 PetriNetUnfolderBase]: 619/1134 cut-off events. [2023-11-29 00:25:14,604 INFO L125 PetriNetUnfolderBase]: For 3562/3562 co-relation queries the response was YES. [2023-11-29 00:25:14,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4213 conditions, 1134 events. 619/1134 cut-off events. For 3562/3562 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 5059 event pairs, 16 based on Foata normal form. 70/1124 useless extension candidates. Maximal degree in co-relation 1614. Up to 329 conditions per place. [2023-11-29 00:25:14,616 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 147 selfloop transitions, 63 changer transitions 0/217 dead transitions. [2023-11-29 00:25:14,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 217 transitions, 1836 flow [2023-11-29 00:25:14,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-29 00:25:14,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-29 00:25:14,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 380 transitions. [2023-11-29 00:25:14,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6239737274220033 [2023-11-29 00:25:14,619 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 380 transitions. [2023-11-29 00:25:14,619 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 380 transitions. [2023-11-29 00:25:14,620 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:25:14,620 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 380 transitions. [2023-11-29 00:25:14,622 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 18.095238095238095) internal successors, (380), 21 states have internal predecessors, (380), 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) [2023-11-29 00:25:14,624 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 29.0) internal successors, (638), 22 states have internal predecessors, (638), 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) [2023-11-29 00:25:14,624 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 29.0) internal successors, (638), 22 states have internal predecessors, (638), 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) [2023-11-29 00:25:14,625 INFO L175 Difference]: Start difference. First operand has 54 places, 48 transitions, 337 flow. Second operand 21 states and 380 transitions. [2023-11-29 00:25:14,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 217 transitions, 1836 flow [2023-11-29 00:25:14,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 217 transitions, 1783 flow, removed 25 selfloop flow, removed 1 redundant places. [2023-11-29 00:25:14,635 INFO L231 Difference]: Finished difference. Result has 89 places, 94 transitions, 1038 flow [2023-11-29 00:25:14,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1038, PETRI_PLACES=89, PETRI_TRANSITIONS=94} [2023-11-29 00:25:14,636 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 60 predicate places. [2023-11-29 00:25:14,636 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 94 transitions, 1038 flow [2023-11-29 00:25:14,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 12.5) internal successors, (150), 12 states have internal predecessors, (150), 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) [2023-11-29 00:25:14,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:25:14,637 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:25:14,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66492b99-3a94-4004-8249-cc06e683b41a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 00:25:14,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66492b99-3a94-4004-8249-cc06e683b41a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-29 00:25:14,838 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 00:25:14,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:25:14,839 INFO L85 PathProgramCache]: Analyzing trace with hash 815361563, now seen corresponding path program 2 times [2023-11-29 00:25:14,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:25:14,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840282731] [2023-11-29 00:25:14,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:25:14,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:25:14,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:25:14,955 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 00:25:14,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:25:14,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840282731] [2023-11-29 00:25:14,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840282731] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:25:14,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:25:14,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 00:25:14,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986753929] [2023-11-29 00:25:14,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:25:14,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:25:14,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:25:14,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:25:14,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:25:14,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2023-11-29 00:25:14,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 94 transitions, 1038 flow. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 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) [2023-11-29 00:25:14,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:25:14,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2023-11-29 00:25:14,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:25:15,315 INFO L124 PetriNetUnfolderBase]: 1074/2251 cut-off events. [2023-11-29 00:25:15,316 INFO L125 PetriNetUnfolderBase]: For 17632/17724 co-relation queries the response was YES. [2023-11-29 00:25:15,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10660 conditions, 2251 events. 1074/2251 cut-off events. For 17632/17724 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 14156 event pairs, 338 based on Foata normal form. 22/1977 useless extension candidates. Maximal degree in co-relation 8872. Up to 506 conditions per place. [2023-11-29 00:25:15,340 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 121 selfloop transitions, 36 changer transitions 0/192 dead transitions. [2023-11-29 00:25:15,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 192 transitions, 2492 flow [2023-11-29 00:25:15,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 00:25:15,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 00:25:15,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 88 transitions. [2023-11-29 00:25:15,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7586206896551724 [2023-11-29 00:25:15,341 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 88 transitions. [2023-11-29 00:25:15,342 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 88 transitions. [2023-11-29 00:25:15,342 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:25:15,342 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 88 transitions. [2023-11-29 00:25:15,342 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 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) [2023-11-29 00:25:15,343 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 29.0) internal successors, (145), 5 states have internal predecessors, (145), 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) [2023-11-29 00:25:15,343 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 29.0) internal successors, (145), 5 states have internal predecessors, (145), 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) [2023-11-29 00:25:15,343 INFO L175 Difference]: Start difference. First operand has 89 places, 94 transitions, 1038 flow. Second operand 4 states and 88 transitions. [2023-11-29 00:25:15,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 192 transitions, 2492 flow [2023-11-29 00:25:15,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 192 transitions, 2353 flow, removed 63 selfloop flow, removed 3 redundant places. [2023-11-29 00:25:15,395 INFO L231 Difference]: Finished difference. Result has 92 places, 130 transitions, 1567 flow [2023-11-29 00:25:15,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=965, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1567, PETRI_PLACES=92, PETRI_TRANSITIONS=130} [2023-11-29 00:25:15,396 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 63 predicate places. [2023-11-29 00:25:15,396 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 130 transitions, 1567 flow [2023-11-29 00:25:15,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 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) [2023-11-29 00:25:15,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:25:15,397 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:25:15,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-29 00:25:15,397 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 00:25:15,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:25:15,397 INFO L85 PathProgramCache]: Analyzing trace with hash 331719525, now seen corresponding path program 1 times [2023-11-29 00:25:15,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:25:15,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281821604] [2023-11-29 00:25:15,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:25:15,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:25:15,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:25:15,512 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:25:15,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:25:15,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281821604] [2023-11-29 00:25:15,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281821604] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:25:15,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:25:15,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 00:25:15,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332153395] [2023-11-29 00:25:15,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:25:15,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:25:15,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:25:15,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:25:15,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:25:15,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2023-11-29 00:25:15,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 130 transitions, 1567 flow. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 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) [2023-11-29 00:25:15,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:25:15,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2023-11-29 00:25:15,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:25:16,337 INFO L124 PetriNetUnfolderBase]: 2500/5078 cut-off events. [2023-11-29 00:25:16,338 INFO L125 PetriNetUnfolderBase]: For 41869/41926 co-relation queries the response was YES. [2023-11-29 00:25:16,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24926 conditions, 5078 events. 2500/5078 cut-off events. For 41869/41926 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 37915 event pairs, 742 based on Foata normal form. 6/4768 useless extension candidates. Maximal degree in co-relation 21923. Up to 1555 conditions per place. [2023-11-29 00:25:16,392 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 218 selfloop transitions, 31 changer transitions 0/285 dead transitions. [2023-11-29 00:25:16,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 285 transitions, 4143 flow [2023-11-29 00:25:16,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 00:25:16,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 00:25:16,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 87 transitions. [2023-11-29 00:25:16,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.75 [2023-11-29 00:25:16,394 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 87 transitions. [2023-11-29 00:25:16,394 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 87 transitions. [2023-11-29 00:25:16,394 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:25:16,394 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 87 transitions. [2023-11-29 00:25:16,394 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 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) [2023-11-29 00:25:16,395 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 29.0) internal successors, (145), 5 states have internal predecessors, (145), 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) [2023-11-29 00:25:16,395 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 29.0) internal successors, (145), 5 states have internal predecessors, (145), 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) [2023-11-29 00:25:16,395 INFO L175 Difference]: Start difference. First operand has 92 places, 130 transitions, 1567 flow. Second operand 4 states and 87 transitions. [2023-11-29 00:25:16,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 285 transitions, 4143 flow [2023-11-29 00:25:16,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 285 transitions, 4130 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-11-29 00:25:16,600 INFO L231 Difference]: Finished difference. Result has 97 places, 161 transitions, 2101 flow [2023-11-29 00:25:16,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1561, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2101, PETRI_PLACES=97, PETRI_TRANSITIONS=161} [2023-11-29 00:25:16,602 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 68 predicate places. [2023-11-29 00:25:16,602 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 161 transitions, 2101 flow [2023-11-29 00:25:16,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 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) [2023-11-29 00:25:16,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:25:16,602 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:25:16,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-29 00:25:16,603 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 00:25:16,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:25:16,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1274647539, now seen corresponding path program 1 times [2023-11-29 00:25:16,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:25:16,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384100854] [2023-11-29 00:25:16,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:25:16,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:25:16,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:25:16,760 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:25:16,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:25:16,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384100854] [2023-11-29 00:25:16,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384100854] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:25:16,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:25:16,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 00:25:16,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022402631] [2023-11-29 00:25:16,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:25:16,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:25:16,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:25:16,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:25:16,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:25:16,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2023-11-29 00:25:16,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 161 transitions, 2101 flow. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 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) [2023-11-29 00:25:16,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:25:16,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2023-11-29 00:25:16,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:25:17,665 INFO L124 PetriNetUnfolderBase]: 2030/4266 cut-off events. [2023-11-29 00:25:17,665 INFO L125 PetriNetUnfolderBase]: For 40794/40851 co-relation queries the response was YES. [2023-11-29 00:25:17,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22370 conditions, 4266 events. 2030/4266 cut-off events. For 40794/40851 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 31559 event pairs, 469 based on Foata normal form. 118/4294 useless extension candidates. Maximal degree in co-relation 20343. Up to 1161 conditions per place. [2023-11-29 00:25:17,728 INFO L140 encePairwiseOnDemand]: 27/29 looper letters, 172 selfloop transitions, 31 changer transitions 0/239 dead transitions. [2023-11-29 00:25:17,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 239 transitions, 3505 flow [2023-11-29 00:25:17,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 00:25:17,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 00:25:17,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 83 transitions. [2023-11-29 00:25:17,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7155172413793104 [2023-11-29 00:25:17,729 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 83 transitions. [2023-11-29 00:25:17,730 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 83 transitions. [2023-11-29 00:25:17,730 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:25:17,730 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 83 transitions. [2023-11-29 00:25:17,730 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 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) [2023-11-29 00:25:17,731 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 29.0) internal successors, (145), 5 states have internal predecessors, (145), 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) [2023-11-29 00:25:17,731 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 29.0) internal successors, (145), 5 states have internal predecessors, (145), 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) [2023-11-29 00:25:17,731 INFO L175 Difference]: Start difference. First operand has 97 places, 161 transitions, 2101 flow. Second operand 4 states and 83 transitions. [2023-11-29 00:25:17,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 239 transitions, 3505 flow [2023-11-29 00:25:17,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 239 transitions, 3505 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-29 00:25:17,877 INFO L231 Difference]: Finished difference. Result has 102 places, 152 transitions, 2060 flow [2023-11-29 00:25:17,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1959, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2060, PETRI_PLACES=102, PETRI_TRANSITIONS=152} [2023-11-29 00:25:17,878 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 73 predicate places. [2023-11-29 00:25:17,878 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 152 transitions, 2060 flow [2023-11-29 00:25:17,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 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) [2023-11-29 00:25:17,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:25:17,879 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:25:17,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-29 00:25:17,879 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 00:25:17,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:25:17,879 INFO L85 PathProgramCache]: Analyzing trace with hash 965397211, now seen corresponding path program 1 times [2023-11-29 00:25:17,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:25:17,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043784436] [2023-11-29 00:25:17,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:25:17,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:25:17,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:25:18,120 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:25:18,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:25:18,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043784436] [2023-11-29 00:25:18,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043784436] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:25:18,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232563299] [2023-11-29 00:25:18,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:25:18,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:25:18,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66492b99-3a94-4004-8249-cc06e683b41a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:25:18,123 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66492b99-3a94-4004-8249-cc06e683b41a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:25:18,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66492b99-3a94-4004-8249-cc06e683b41a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 00:25:18,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:25:18,239 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 00:25:18,242 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:25:18,345 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:25:18,346 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:25:18,435 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:25:18,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232563299] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:25:18,435 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:25:18,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2023-11-29 00:25:18,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080178409] [2023-11-29 00:25:18,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:25:18,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 00:25:18,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:25:18,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 00:25:18,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:25:18,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2023-11-29 00:25:18,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 152 transitions, 2060 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 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) [2023-11-29 00:25:18,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:25:18,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2023-11-29 00:25:18,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:25:19,593 INFO L124 PetriNetUnfolderBase]: 3109/6581 cut-off events. [2023-11-29 00:25:19,593 INFO L125 PetriNetUnfolderBase]: For 66635/66916 co-relation queries the response was YES. [2023-11-29 00:25:19,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36607 conditions, 6581 events. 3109/6581 cut-off events. For 66635/66916 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 51431 event pairs, 705 based on Foata normal form. 14/6450 useless extension candidates. Maximal degree in co-relation 32704. Up to 2904 conditions per place. [2023-11-29 00:25:19,657 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 271 selfloop transitions, 16 changer transitions 1/324 dead transitions. [2023-11-29 00:25:19,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 324 transitions, 5118 flow [2023-11-29 00:25:19,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 00:25:19,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 00:25:19,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 114 transitions. [2023-11-29 00:25:19,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7862068965517242 [2023-11-29 00:25:19,658 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 114 transitions. [2023-11-29 00:25:19,659 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 114 transitions. [2023-11-29 00:25:19,659 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:25:19,659 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 114 transitions. [2023-11-29 00:25:19,660 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 22.8) internal successors, (114), 5 states have internal predecessors, (114), 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) [2023-11-29 00:25:19,660 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 29.0) internal successors, (174), 6 states have internal predecessors, (174), 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) [2023-11-29 00:25:19,660 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 29.0) internal successors, (174), 6 states have internal predecessors, (174), 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) [2023-11-29 00:25:19,661 INFO L175 Difference]: Start difference. First operand has 102 places, 152 transitions, 2060 flow. Second operand 5 states and 114 transitions. [2023-11-29 00:25:19,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 324 transitions, 5118 flow [2023-11-29 00:25:19,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 324 transitions, 5118 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-29 00:25:19,850 INFO L231 Difference]: Finished difference. Result has 107 places, 163 transitions, 2157 flow [2023-11-29 00:25:19,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=2060, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2157, PETRI_PLACES=107, PETRI_TRANSITIONS=163} [2023-11-29 00:25:19,851 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 78 predicate places. [2023-11-29 00:25:19,851 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 163 transitions, 2157 flow [2023-11-29 00:25:19,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 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) [2023-11-29 00:25:19,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:25:19,852 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:25:19,856 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66492b99-3a94-4004-8249-cc06e683b41a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 00:25:20,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66492b99-3a94-4004-8249-cc06e683b41a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:25:20,053 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 00:25:20,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:25:20,053 INFO L85 PathProgramCache]: Analyzing trace with hash 678431211, now seen corresponding path program 2 times [2023-11-29 00:25:20,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:25:20,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319317192] [2023-11-29 00:25:20,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:25:20,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:25:20,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:25:20,314 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:25:20,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:25:20,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319317192] [2023-11-29 00:25:20,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319317192] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:25:20,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633461359] [2023-11-29 00:25:20,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:25:20,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:25:20,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66492b99-3a94-4004-8249-cc06e683b41a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:25:20,316 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66492b99-3a94-4004-8249-cc06e683b41a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:25:20,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66492b99-3a94-4004-8249-cc06e683b41a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 00:25:20,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:25:20,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:25:20,402 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 00:25:20,404 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:25:20,486 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:25:20,487 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:25:20,583 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:25:20,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633461359] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:25:20,584 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:25:20,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2023-11-29 00:25:20,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002280580] [2023-11-29 00:25:20,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:25:20,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 00:25:20,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:25:20,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 00:25:20,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-29 00:25:20,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2023-11-29 00:25:20,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 163 transitions, 2157 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 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) [2023-11-29 00:25:20,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:25:20,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2023-11-29 00:25:20,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:25:21,925 INFO L124 PetriNetUnfolderBase]: 3595/7645 cut-off events. [2023-11-29 00:25:21,925 INFO L125 PetriNetUnfolderBase]: For 81263/81761 co-relation queries the response was YES. [2023-11-29 00:25:21,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44544 conditions, 7645 events. 3595/7645 cut-off events. For 81263/81761 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 61656 event pairs, 760 based on Foata normal form. 62/7555 useless extension candidates. Maximal degree in co-relation 39526. Up to 2763 conditions per place. [2023-11-29 00:25:21,987 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 312 selfloop transitions, 24 changer transitions 1/373 dead transitions. [2023-11-29 00:25:21,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 373 transitions, 5953 flow [2023-11-29 00:25:21,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 00:25:21,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 00:25:21,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 136 transitions. [2023-11-29 00:25:21,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7816091954022989 [2023-11-29 00:25:21,989 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 136 transitions. [2023-11-29 00:25:21,989 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 136 transitions. [2023-11-29 00:25:21,989 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:25:21,989 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 136 transitions. [2023-11-29 00:25:21,990 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 states have internal predecessors, (136), 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) [2023-11-29 00:25:21,991 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 29.0) internal successors, (203), 7 states have internal predecessors, (203), 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) [2023-11-29 00:25:21,991 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 29.0) internal successors, (203), 7 states have internal predecessors, (203), 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) [2023-11-29 00:25:21,991 INFO L175 Difference]: Start difference. First operand has 107 places, 163 transitions, 2157 flow. Second operand 6 states and 136 transitions. [2023-11-29 00:25:21,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 373 transitions, 5953 flow [2023-11-29 00:25:22,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 373 transitions, 5915 flow, removed 19 selfloop flow, removed 0 redundant places. [2023-11-29 00:25:22,199 INFO L231 Difference]: Finished difference. Result has 113 places, 171 transitions, 2240 flow [2023-11-29 00:25:22,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=2135, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2240, PETRI_PLACES=113, PETRI_TRANSITIONS=171} [2023-11-29 00:25:22,200 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 84 predicate places. [2023-11-29 00:25:22,200 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 171 transitions, 2240 flow [2023-11-29 00:25:22,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 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) [2023-11-29 00:25:22,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:25:22,200 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:25:22,205 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66492b99-3a94-4004-8249-cc06e683b41a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 00:25:22,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66492b99-3a94-4004-8249-cc06e683b41a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:25:22,401 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 00:25:22,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:25:22,401 INFO L85 PathProgramCache]: Analyzing trace with hash -498479793, now seen corresponding path program 3 times [2023-11-29 00:25:22,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:25:22,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946988844] [2023-11-29 00:25:22,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:25:22,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:25:22,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:25:22,667 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:25:22,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:25:22,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946988844] [2023-11-29 00:25:22,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946988844] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:25:22,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013669681] [2023-11-29 00:25:22,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 00:25:22,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:25:22,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66492b99-3a94-4004-8249-cc06e683b41a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:25:22,669 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66492b99-3a94-4004-8249-cc06e683b41a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:25:22,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66492b99-3a94-4004-8249-cc06e683b41a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 00:25:22,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 00:25:22,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:25:22,766 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 00:25:22,768 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:25:22,861 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:25:22,861 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:25:22,959 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:25:22,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013669681] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:25:22,959 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:25:22,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2023-11-29 00:25:22,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886697299] [2023-11-29 00:25:22,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:25:22,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 00:25:22,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:25:22,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 00:25:22,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-29 00:25:22,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2023-11-29 00:25:22,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 171 transitions, 2240 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 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) [2023-11-29 00:25:22,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:25:22,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2023-11-29 00:25:22,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:25:25,063 INFO L124 PetriNetUnfolderBase]: 5530/11712 cut-off events. [2023-11-29 00:25:25,063 INFO L125 PetriNetUnfolderBase]: For 122671/123414 co-relation queries the response was YES. [2023-11-29 00:25:25,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68173 conditions, 11712 events. 5530/11712 cut-off events. For 122671/123414 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 102142 event pairs, 777 based on Foata normal form. 51/11578 useless extension candidates. Maximal degree in co-relation 57527. Up to 5044 conditions per place. [2023-11-29 00:25:25,196 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 381 selfloop transitions, 26 changer transitions 1/444 dead transitions. [2023-11-29 00:25:25,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 444 transitions, 7004 flow [2023-11-29 00:25:25,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 00:25:25,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 00:25:25,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2023-11-29 00:25:25,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8218390804597702 [2023-11-29 00:25:25,198 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 143 transitions. [2023-11-29 00:25:25,198 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 143 transitions. [2023-11-29 00:25:25,198 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:25:25,198 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 143 transitions. [2023-11-29 00:25:25,199 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 23.833333333333332) internal successors, (143), 6 states have internal predecessors, (143), 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) [2023-11-29 00:25:25,199 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 29.0) internal successors, (203), 7 states have internal predecessors, (203), 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) [2023-11-29 00:25:25,199 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 29.0) internal successors, (203), 7 states have internal predecessors, (203), 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) [2023-11-29 00:25:25,199 INFO L175 Difference]: Start difference. First operand has 113 places, 171 transitions, 2240 flow. Second operand 6 states and 143 transitions. [2023-11-29 00:25:25,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 444 transitions, 7004 flow [2023-11-29 00:25:25,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 444 transitions, 6939 flow, removed 25 selfloop flow, removed 1 redundant places. [2023-11-29 00:25:25,717 INFO L231 Difference]: Finished difference. Result has 119 places, 192 transitions, 2421 flow [2023-11-29 00:25:25,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=2215, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2421, PETRI_PLACES=119, PETRI_TRANSITIONS=192} [2023-11-29 00:25:25,718 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 90 predicate places. [2023-11-29 00:25:25,718 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 192 transitions, 2421 flow [2023-11-29 00:25:25,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 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) [2023-11-29 00:25:25,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:25:25,718 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:25:25,722 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66492b99-3a94-4004-8249-cc06e683b41a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 00:25:25,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66492b99-3a94-4004-8249-cc06e683b41a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:25:25,919 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 00:25:25,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:25:25,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1022439387, now seen corresponding path program 4 times [2023-11-29 00:25:25,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:25:25,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681317274] [2023-11-29 00:25:25,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:25:25,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:25:26,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:25:26,159 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:25:26,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:25:26,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681317274] [2023-11-29 00:25:26,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681317274] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:25:26,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560014655] [2023-11-29 00:25:26,160 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 00:25:26,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:25:26,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66492b99-3a94-4004-8249-cc06e683b41a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:25:26,162 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66492b99-3a94-4004-8249-cc06e683b41a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:25:26,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66492b99-3a94-4004-8249-cc06e683b41a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 00:25:26,240 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 00:25:26,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:25:26,241 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 00:25:26,243 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:25:26,319 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:25:26,319 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:25:26,399 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:25:26,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560014655] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:25:26,399 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:25:26,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2023-11-29 00:25:26,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582772059] [2023-11-29 00:25:26,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:25:26,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 00:25:26,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:25:26,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 00:25:26,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:25:26,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2023-11-29 00:25:26,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 192 transitions, 2421 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 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) [2023-11-29 00:25:26,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:25:26,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2023-11-29 00:25:26,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:25:28,567 INFO L124 PetriNetUnfolderBase]: 5916/12678 cut-off events. [2023-11-29 00:25:28,568 INFO L125 PetriNetUnfolderBase]: For 137417/138294 co-relation queries the response was YES. [2023-11-29 00:25:28,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74747 conditions, 12678 events. 5916/12678 cut-off events. For 137417/138294 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 112913 event pairs, 995 based on Foata normal form. 107/12597 useless extension candidates. Maximal degree in co-relation 63629. Up to 8380 conditions per place. [2023-11-29 00:25:28,674 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 244 selfloop transitions, 20 changer transitions 1/301 dead transitions. [2023-11-29 00:25:28,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 301 transitions, 4388 flow [2023-11-29 00:25:28,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 00:25:28,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 00:25:28,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 114 transitions. [2023-11-29 00:25:28,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7862068965517242 [2023-11-29 00:25:28,676 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 114 transitions. [2023-11-29 00:25:28,676 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 114 transitions. [2023-11-29 00:25:28,676 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:25:28,676 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 114 transitions. [2023-11-29 00:25:28,676 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 22.8) internal successors, (114), 5 states have internal predecessors, (114), 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) [2023-11-29 00:25:28,677 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 29.0) internal successors, (174), 6 states have internal predecessors, (174), 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) [2023-11-29 00:25:28,677 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 29.0) internal successors, (174), 6 states have internal predecessors, (174), 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) [2023-11-29 00:25:28,677 INFO L175 Difference]: Start difference. First operand has 119 places, 192 transitions, 2421 flow. Second operand 5 states and 114 transitions. [2023-11-29 00:25:28,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 301 transitions, 4388 flow [2023-11-29 00:25:29,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 301 transitions, 4364 flow, removed 12 selfloop flow, removed 0 redundant places. [2023-11-29 00:25:29,095 INFO L231 Difference]: Finished difference. Result has 126 places, 207 transitions, 2584 flow [2023-11-29 00:25:29,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=2405, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2584, PETRI_PLACES=126, PETRI_TRANSITIONS=207} [2023-11-29 00:25:29,096 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 97 predicate places. [2023-11-29 00:25:29,096 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 207 transitions, 2584 flow [2023-11-29 00:25:29,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 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) [2023-11-29 00:25:29,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:25:29,096 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:25:29,100 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66492b99-3a94-4004-8249-cc06e683b41a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 00:25:29,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66492b99-3a94-4004-8249-cc06e683b41a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-29 00:25:29,297 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 00:25:29,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:25:29,297 INFO L85 PathProgramCache]: Analyzing trace with hash 602507517, now seen corresponding path program 5 times [2023-11-29 00:25:29,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:25:29,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303983828] [2023-11-29 00:25:29,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:25:29,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:25:29,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:25:29,427 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:25:29,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:25:29,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303983828] [2023-11-29 00:25:29,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303983828] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:25:29,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533139688] [2023-11-29 00:25:29,428 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 00:25:29,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:25:29,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66492b99-3a94-4004-8249-cc06e683b41a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:25:29,431 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66492b99-3a94-4004-8249-cc06e683b41a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:25:29,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66492b99-3a94-4004-8249-cc06e683b41a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 00:25:29,528 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-29 00:25:29,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:25:29,530 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 00:25:29,531 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:25:29,605 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:25:29,605 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:25:29,685 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:25:29,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533139688] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:25:29,685 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:25:29,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2023-11-29 00:25:29,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104123811] [2023-11-29 00:25:29,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:25:29,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 00:25:29,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:25:29,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 00:25:29,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-29 00:25:29,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2023-11-29 00:25:29,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 207 transitions, 2584 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 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) [2023-11-29 00:25:29,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:25:29,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2023-11-29 00:25:29,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:25:32,909 INFO L124 PetriNetUnfolderBase]: 8542/18101 cut-off events. [2023-11-29 00:25:32,909 INFO L125 PetriNetUnfolderBase]: For 196168/197553 co-relation queries the response was YES. [2023-11-29 00:25:33,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107400 conditions, 18101 events. 8542/18101 cut-off events. For 196168/197553 co-relation queries the response was YES. Maximal size of possible extension queue 740. Compared 169456 event pairs, 1194 based on Foata normal form. 272/18120 useless extension candidates. Maximal degree in co-relation 90580. Up to 7824 conditions per place. [2023-11-29 00:25:33,114 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 406 selfloop transitions, 44 changer transitions 1/487 dead transitions. [2023-11-29 00:25:33,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 487 transitions, 7508 flow [2023-11-29 00:25:33,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 00:25:33,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 00:25:33,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2023-11-29 00:25:33,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8218390804597702 [2023-11-29 00:25:33,115 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 143 transitions. [2023-11-29 00:25:33,115 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 143 transitions. [2023-11-29 00:25:33,116 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:25:33,116 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 143 transitions. [2023-11-29 00:25:33,116 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 23.833333333333332) internal successors, (143), 6 states have internal predecessors, (143), 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) [2023-11-29 00:25:33,117 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 29.0) internal successors, (203), 7 states have internal predecessors, (203), 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) [2023-11-29 00:25:33,117 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 29.0) internal successors, (203), 7 states have internal predecessors, (203), 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) [2023-11-29 00:25:33,117 INFO L175 Difference]: Start difference. First operand has 126 places, 207 transitions, 2584 flow. Second operand 6 states and 143 transitions. [2023-11-29 00:25:33,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 487 transitions, 7508 flow [2023-11-29 00:25:33,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 487 transitions, 7490 flow, removed 9 selfloop flow, removed 0 redundant places. [2023-11-29 00:25:33,983 INFO L231 Difference]: Finished difference. Result has 134 places, 231 transitions, 2922 flow [2023-11-29 00:25:33,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=2566, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2922, PETRI_PLACES=134, PETRI_TRANSITIONS=231} [2023-11-29 00:25:33,984 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 105 predicate places. [2023-11-29 00:25:33,984 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 231 transitions, 2922 flow [2023-11-29 00:25:33,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 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) [2023-11-29 00:25:33,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:25:33,984 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:25:33,988 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66492b99-3a94-4004-8249-cc06e683b41a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 00:25:34,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66492b99-3a94-4004-8249-cc06e683b41a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 00:25:34,185 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 00:25:34,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:25:34,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1871747717, now seen corresponding path program 6 times [2023-11-29 00:25:34,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:25:34,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692008278] [2023-11-29 00:25:34,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:25:34,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:25:34,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:25:34,350 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:25:34,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:25:34,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692008278] [2023-11-29 00:25:34,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692008278] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:25:34,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158639492] [2023-11-29 00:25:34,350 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 00:25:34,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:25:34,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66492b99-3a94-4004-8249-cc06e683b41a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:25:34,352 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66492b99-3a94-4004-8249-cc06e683b41a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:25:34,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66492b99-3a94-4004-8249-cc06e683b41a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 00:25:34,449 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-29 00:25:34,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:25:34,450 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 00:25:34,452 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:25:34,527 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:25:34,527 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:25:34,609 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:25:34,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158639492] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:25:34,610 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:25:34,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2023-11-29 00:25:34,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280140266] [2023-11-29 00:25:34,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:25:34,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 00:25:34,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:25:34,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 00:25:34,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-29 00:25:34,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2023-11-29 00:25:34,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 231 transitions, 2922 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 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) [2023-11-29 00:25:34,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:25:34,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2023-11-29 00:25:34,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:25:38,545 INFO L124 PetriNetUnfolderBase]: 9923/21192 cut-off events. [2023-11-29 00:25:38,545 INFO L125 PetriNetUnfolderBase]: For 246613/248279 co-relation queries the response was YES. [2023-11-29 00:25:38,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130675 conditions, 21192 events. 9923/21192 cut-off events. For 246613/248279 co-relation queries the response was YES. Maximal size of possible extension queue 852. Compared 204296 event pairs, 1504 based on Foata normal form. 355/21314 useless extension candidates. Maximal degree in co-relation 109874. Up to 10034 conditions per place. [2023-11-29 00:25:38,791 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 395 selfloop transitions, 53 changer transitions 1/485 dead transitions. [2023-11-29 00:25:38,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 485 transitions, 7557 flow [2023-11-29 00:25:38,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 00:25:38,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 00:25:38,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2023-11-29 00:25:38,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8045977011494253 [2023-11-29 00:25:38,793 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 140 transitions. [2023-11-29 00:25:38,793 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 140 transitions. [2023-11-29 00:25:38,793 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:25:38,793 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 140 transitions. [2023-11-29 00:25:38,794 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 23.333333333333332) internal successors, (140), 6 states have internal predecessors, (140), 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) [2023-11-29 00:25:38,795 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 29.0) internal successors, (203), 7 states have internal predecessors, (203), 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) [2023-11-29 00:25:38,795 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 29.0) internal successors, (203), 7 states have internal predecessors, (203), 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) [2023-11-29 00:25:38,795 INFO L175 Difference]: Start difference. First operand has 134 places, 231 transitions, 2922 flow. Second operand 6 states and 140 transitions. [2023-11-29 00:25:38,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 485 transitions, 7557 flow [2023-11-29 00:25:39,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 485 transitions, 7469 flow, removed 44 selfloop flow, removed 0 redundant places. [2023-11-29 00:25:39,909 INFO L231 Difference]: Finished difference. Result has 142 places, 253 transitions, 3255 flow [2023-11-29 00:25:39,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=2868, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3255, PETRI_PLACES=142, PETRI_TRANSITIONS=253} [2023-11-29 00:25:39,909 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 113 predicate places. [2023-11-29 00:25:39,910 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 253 transitions, 3255 flow [2023-11-29 00:25:39,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 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) [2023-11-29 00:25:39,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:25:39,910 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:25:39,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66492b99-3a94-4004-8249-cc06e683b41a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-29 00:25:40,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66492b99-3a94-4004-8249-cc06e683b41a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 00:25:40,111 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 00:25:40,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:25:40,111 INFO L85 PathProgramCache]: Analyzing trace with hash -1396979559, now seen corresponding path program 1 times [2023-11-29 00:25:40,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:25:40,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248942447] [2023-11-29 00:25:40,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:25:40,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:25:40,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:25:40,191 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 00:25:40,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:25:40,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248942447] [2023-11-29 00:25:40,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248942447] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:25:40,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:25:40,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 00:25:40,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773027522] [2023-11-29 00:25:40,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:25:40,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:25:40,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:25:40,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:25:40,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:25:40,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2023-11-29 00:25:40,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 253 transitions, 3255 flow. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 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) [2023-11-29 00:25:40,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:25:40,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2023-11-29 00:25:40,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:25:42,117 INFO L124 PetriNetUnfolderBase]: 5062/11468 cut-off events. [2023-11-29 00:25:42,117 INFO L125 PetriNetUnfolderBase]: For 156354/157286 co-relation queries the response was YES. [2023-11-29 00:25:42,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72691 conditions, 11468 events. 5062/11468 cut-off events. For 156354/157286 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 102664 event pairs, 940 based on Foata normal form. 351/11588 useless extension candidates. Maximal degree in co-relation 61541. Up to 3892 conditions per place. [2023-11-29 00:25:42,255 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 158 selfloop transitions, 42 changer transitions 0/274 dead transitions. [2023-11-29 00:25:42,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 274 transitions, 4152 flow [2023-11-29 00:25:42,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 00:25:42,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 00:25:42,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 80 transitions. [2023-11-29 00:25:42,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6896551724137931 [2023-11-29 00:25:42,257 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 80 transitions. [2023-11-29 00:25:42,257 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 80 transitions. [2023-11-29 00:25:42,257 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:25:42,257 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 80 transitions. [2023-11-29 00:25:42,258 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 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) [2023-11-29 00:25:42,258 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 29.0) internal successors, (145), 5 states have internal predecessors, (145), 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) [2023-11-29 00:25:42,258 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 29.0) internal successors, (145), 5 states have internal predecessors, (145), 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) [2023-11-29 00:25:42,258 INFO L175 Difference]: Start difference. First operand has 142 places, 253 transitions, 3255 flow. Second operand 4 states and 80 transitions. [2023-11-29 00:25:42,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 274 transitions, 4152 flow [2023-11-29 00:25:42,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 274 transitions, 4126 flow, removed 8 selfloop flow, removed 1 redundant places. [2023-11-29 00:25:42,680 INFO L231 Difference]: Finished difference. Result has 146 places, 215 transitions, 2931 flow [2023-11-29 00:25:42,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=2788, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2931, PETRI_PLACES=146, PETRI_TRANSITIONS=215} [2023-11-29 00:25:42,681 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 117 predicate places. [2023-11-29 00:25:42,681 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 215 transitions, 2931 flow [2023-11-29 00:25:42,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 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) [2023-11-29 00:25:42,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:25:42,681 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:25:42,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-29 00:25:42,681 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 00:25:42,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:25:42,682 INFO L85 PathProgramCache]: Analyzing trace with hash -449549077, now seen corresponding path program 7 times [2023-11-29 00:25:42,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:25:42,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531752085] [2023-11-29 00:25:42,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:25:42,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:25:42,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:25:43,282 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:25:43,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:25:43,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531752085] [2023-11-29 00:25:43,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531752085] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:25:43,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254015870] [2023-11-29 00:25:43,283 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 00:25:43,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:25:43,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66492b99-3a94-4004-8249-cc06e683b41a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:25:43,284 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66492b99-3a94-4004-8249-cc06e683b41a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:25:43,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66492b99-3a94-4004-8249-cc06e683b41a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 00:25:43,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:25:43,459 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 00:25:43,461 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:25:44,171 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:25:44,171 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:25:45,800 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:25:45,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254015870] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:25:45,800 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:25:45,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 23 [2023-11-29 00:25:45,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164984595] [2023-11-29 00:25:45,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:25:45,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-29 00:25:45,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:25:45,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-29 00:25:45,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2023-11-29 00:25:45,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2023-11-29 00:25:45,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 215 transitions, 2931 flow. Second operand has 24 states, 24 states have (on average 13.458333333333334) internal successors, (323), 24 states have internal predecessors, (323), 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) [2023-11-29 00:25:45,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:25:45,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2023-11-29 00:25:45,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:26:23,844 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.44s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:26:36,603 INFO L124 PetriNetUnfolderBase]: 12168/26883 cut-off events. [2023-11-29 00:26:36,603 INFO L125 PetriNetUnfolderBase]: For 393270/395072 co-relation queries the response was YES. [2023-11-29 00:26:36,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174444 conditions, 26883 events. 12168/26883 cut-off events. For 393270/395072 co-relation queries the response was YES. Maximal size of possible extension queue 1070. Compared 273741 event pairs, 262 based on Foata normal form. 1252/28081 useless extension candidates. Maximal degree in co-relation 148759. Up to 5989 conditions per place. [2023-11-29 00:26:36,884 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 693 selfloop transitions, 288 changer transitions 35/1069 dead transitions. [2023-11-29 00:26:36,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 1069 transitions, 14427 flow [2023-11-29 00:26:36,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-11-29 00:26:36,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2023-11-29 00:26:36,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 910 transitions. [2023-11-29 00:26:36,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.603448275862069 [2023-11-29 00:26:36,891 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 910 transitions. [2023-11-29 00:26:36,891 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 910 transitions. [2023-11-29 00:26:36,892 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:26:36,892 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 910 transitions. [2023-11-29 00:26:36,896 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 17.5) internal successors, (910), 52 states have internal predecessors, (910), 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) [2023-11-29 00:26:36,901 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 29.0) internal successors, (1537), 53 states have internal predecessors, (1537), 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) [2023-11-29 00:26:36,901 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 29.0) internal successors, (1537), 53 states have internal predecessors, (1537), 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) [2023-11-29 00:26:36,901 INFO L175 Difference]: Start difference. First operand has 146 places, 215 transitions, 2931 flow. Second operand 52 states and 910 transitions. [2023-11-29 00:26:36,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 1069 transitions, 14427 flow [2023-11-29 00:26:38,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 1069 transitions, 14326 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-29 00:26:38,235 INFO L231 Difference]: Finished difference. Result has 204 places, 442 transitions, 7756 flow [2023-11-29 00:26:38,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=2888, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=7756, PETRI_PLACES=204, PETRI_TRANSITIONS=442} [2023-11-29 00:26:38,236 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 175 predicate places. [2023-11-29 00:26:38,236 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 442 transitions, 7756 flow [2023-11-29 00:26:38,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 13.458333333333334) internal successors, (323), 24 states have internal predecessors, (323), 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) [2023-11-29 00:26:38,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:26:38,236 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:26:38,242 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66492b99-3a94-4004-8249-cc06e683b41a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 00:26:38,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66492b99-3a94-4004-8249-cc06e683b41a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 00:26:38,437 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 00:26:38,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:26:38,437 INFO L85 PathProgramCache]: Analyzing trace with hash 578347093, now seen corresponding path program 8 times [2023-11-29 00:26:38,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:26:38,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158569667] [2023-11-29 00:26:38,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:26:38,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:26:38,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:39,182 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:26:39,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:26:39,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158569667] [2023-11-29 00:26:39,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158569667] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:26:39,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185017156] [2023-11-29 00:26:39,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:26:39,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:26:39,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66492b99-3a94-4004-8249-cc06e683b41a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:26:39,184 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66492b99-3a94-4004-8249-cc06e683b41a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:26:39,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66492b99-3a94-4004-8249-cc06e683b41a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 00:26:39,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:26:39,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:26:39,338 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 00:26:39,339 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:26:39,685 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 00:26:39,686 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:26:40,269 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 00:26:40,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185017156] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:26:40,269 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:26:40,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 22 [2023-11-29 00:26:40,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81423484] [2023-11-29 00:26:40,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:26:40,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 00:26:40,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:26:40,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 00:26:40,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2023-11-29 00:26:40,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 29 [2023-11-29 00:26:40,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 442 transitions, 7756 flow. Second operand has 23 states, 23 states have (on average 11.869565217391305) internal successors, (273), 23 states have internal predecessors, (273), 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) [2023-11-29 00:26:40,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:26:40,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 29 [2023-11-29 00:26:40,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:26:57,342 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:27:00,316 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:27:07,354 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:27:14,624 WARN L293 SmtUtils]: Spent 6.04s on a formula simplification. DAG size of input: 63 DAG size of output: 52 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 00:27:18,730 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:27:39,346 WARN L293 SmtUtils]: Spent 5.96s on a formula simplification. DAG size of input: 59 DAG size of output: 50 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 00:28:04,731 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:28:06,484 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:28:09,140 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:28:11,750 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:28:16,241 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.22s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:28:46,533 WARN L293 SmtUtils]: Spent 11.86s on a formula simplification. DAG size of input: 69 DAG size of output: 56 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 00:29:05,892 WARN L293 SmtUtils]: Spent 11.91s on a formula simplification. DAG size of input: 64 DAG size of output: 55 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 00:29:15,477 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:29:19,480 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:30:08,425 WARN L293 SmtUtils]: Spent 21.48s on a formula simplification. DAG size of input: 73 DAG size of output: 72 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 00:30:12,546 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:30:16,664 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:30:44,903 WARN L293 SmtUtils]: Spent 18.66s on a formula simplification. DAG size of input: 68 DAG size of output: 67 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 00:30:46,466 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:30:47,668 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:31:17,041 WARN L293 SmtUtils]: Spent 18.53s on a formula simplification. DAG size of input: 74 DAG size of output: 67 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 00:31:46,255 WARN L293 SmtUtils]: Spent 9.63s on a formula simplification. DAG size of input: 65 DAG size of output: 47 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 00:31:53,071 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:31:59,546 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:32:03,556 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:32:07,562 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:32:53,706 WARN L293 SmtUtils]: Spent 11.63s on a formula simplification. DAG size of input: 67 DAG size of output: 49 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 00:32:57,525 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:33:00,757 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.58s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:33:05,379 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:33:09,383 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:33:12,384 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:33:13,854 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:33:18,674 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:33:22,680 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:33:28,437 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:33:30,022 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:33:37,398 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:33:53,391 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:34:05,922 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.52s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:34:45,752 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:34:58,335 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.58s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:35:14,304 INFO L124 PetriNetUnfolderBase]: 31858/64633 cut-off events. [2023-11-29 00:35:14,304 INFO L125 PetriNetUnfolderBase]: For 1171679/1171679 co-relation queries the response was YES. [2023-11-29 00:35:14,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 451922 conditions, 64633 events. 31858/64633 cut-off events. For 1171679/1171679 co-relation queries the response was YES. Maximal size of possible extension queue 2203. Compared 674271 event pairs, 1692 based on Foata normal form. 4094/68725 useless extension candidates. Maximal degree in co-relation 434939. Up to 10939 conditions per place. [2023-11-29 00:35:14,970 INFO L140 encePairwiseOnDemand]: 17/29 looper letters, 1956 selfloop transitions, 726 changer transitions 244/2938 dead transitions. [2023-11-29 00:35:14,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 2938 transitions, 47599 flow [2023-11-29 00:35:14,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-11-29 00:35:14,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2023-11-29 00:35:14,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 1178 transitions. [2023-11-29 00:35:14,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6062789500772002 [2023-11-29 00:35:14,975 INFO L72 ComplementDD]: Start complementDD. Operand 67 states and 1178 transitions. [2023-11-29 00:35:14,975 INFO L73 IsDeterministic]: Start isDeterministic. Operand 67 states and 1178 transitions. [2023-11-29 00:35:14,975 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:35:14,975 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 67 states and 1178 transitions. [2023-11-29 00:35:14,978 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 68 states, 67 states have (on average 17.582089552238806) internal successors, (1178), 67 states have internal predecessors, (1178), 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) [2023-11-29 00:35:14,981 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 68 states, 68 states have (on average 29.0) internal successors, (1972), 68 states have internal predecessors, (1972), 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) [2023-11-29 00:35:14,981 INFO L81 ComplementDD]: Finished complementDD. Result has 68 states, 68 states have (on average 29.0) internal successors, (1972), 68 states have internal predecessors, (1972), 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) [2023-11-29 00:35:14,981 INFO L175 Difference]: Start difference. First operand has 204 places, 442 transitions, 7756 flow. Second operand 67 states and 1178 transitions. [2023-11-29 00:35:14,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 2938 transitions, 47599 flow [2023-11-29 00:35:35,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 2938 transitions, 45681 flow, removed 938 selfloop flow, removed 7 redundant places. [2023-11-29 00:35:35,894 INFO L231 Difference]: Finished difference. Result has 291 places, 1017 transitions, 20837 flow [2023-11-29 00:35:35,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=7154, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=67, PETRI_FLOW=20837, PETRI_PLACES=291, PETRI_TRANSITIONS=1017} [2023-11-29 00:35:35,895 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 262 predicate places. [2023-11-29 00:35:35,895 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 1017 transitions, 20837 flow [2023-11-29 00:35:35,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 11.869565217391305) internal successors, (273), 23 states have internal predecessors, (273), 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) [2023-11-29 00:35:35,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:35:35,895 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:35:35,899 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66492b99-3a94-4004-8249-cc06e683b41a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 00:35:36,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66492b99-3a94-4004-8249-cc06e683b41a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 00:35:36,096 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 00:35:36,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:35:36,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1641744553, now seen corresponding path program 9 times [2023-11-29 00:35:36,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:35:36,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731609457] [2023-11-29 00:35:36,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:35:36,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:35:36,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:35:36,409 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 00:35:36,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:35:36,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731609457] [2023-11-29 00:35:36,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731609457] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:35:36,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953824930] [2023-11-29 00:35:36,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 00:35:36,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:35:36,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66492b99-3a94-4004-8249-cc06e683b41a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:35:36,411 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66492b99-3a94-4004-8249-cc06e683b41a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:35:36,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66492b99-3a94-4004-8249-cc06e683b41a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 00:35:36,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-29 00:35:36,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:35:36,586 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 00:35:36,588 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:35:36,929 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 21 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 00:35:36,930 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:35:37,659 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 5 proven. 34 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 00:35:37,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953824930] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:35:37,660 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:35:37,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 23 [2023-11-29 00:35:37,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469792659] [2023-11-29 00:35:37,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:35:37,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-29 00:35:37,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:35:37,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-29 00:35:37,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=417, Unknown=0, NotChecked=0, Total=552 [2023-11-29 00:35:37,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2023-11-29 00:35:37,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 1017 transitions, 20837 flow. Second operand has 24 states, 24 states have (on average 14.375) internal successors, (345), 24 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:37,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:35:37,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2023-11-29 00:35:37,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:36:02,637 INFO L124 PetriNetUnfolderBase]: 28568/60085 cut-off events. [2023-11-29 00:36:02,637 INFO L125 PetriNetUnfolderBase]: For 1384072/1389432 co-relation queries the response was YES. [2023-11-29 00:36:03,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 473893 conditions, 60085 events. 28568/60085 cut-off events. For 1384072/1389432 co-relation queries the response was YES. Maximal size of possible extension queue 2099. Compared 642371 event pairs, 758 based on Foata normal form. 1436/61418 useless extension candidates. Maximal degree in co-relation 466594. Up to 12548 conditions per place. [2023-11-29 00:36:03,584 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 998 selfloop transitions, 534 changer transitions 0/1585 dead transitions. [2023-11-29 00:36:03,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 1585 transitions, 31882 flow [2023-11-29 00:36:03,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-29 00:36:03,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-29 00:36:03,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 409 transitions. [2023-11-29 00:36:03,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6410658307210031 [2023-11-29 00:36:03,586 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 409 transitions. [2023-11-29 00:36:03,586 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 409 transitions. [2023-11-29 00:36:03,586 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:36:03,586 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 409 transitions. [2023-11-29 00:36:03,588 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 18.59090909090909) internal successors, (409), 22 states have internal predecessors, (409), 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) [2023-11-29 00:36:03,589 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 29.0) internal successors, (667), 23 states have internal predecessors, (667), 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) [2023-11-29 00:36:03,590 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 29.0) internal successors, (667), 23 states have internal predecessors, (667), 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) [2023-11-29 00:36:03,590 INFO L175 Difference]: Start difference. First operand has 291 places, 1017 transitions, 20837 flow. Second operand 22 states and 409 transitions. [2023-11-29 00:36:03,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 1585 transitions, 31882 flow [2023-11-29 00:36:38,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 1585 transitions, 30569 flow, removed 257 selfloop flow, removed 14 redundant places. [2023-11-29 00:36:38,678 INFO L231 Difference]: Finished difference. Result has 285 places, 1147 transitions, 24290 flow [2023-11-29 00:36:38,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=19707, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1017, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=406, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=588, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=24290, PETRI_PLACES=285, PETRI_TRANSITIONS=1147} [2023-11-29 00:36:38,679 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 256 predicate places. [2023-11-29 00:36:38,679 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 1147 transitions, 24290 flow [2023-11-29 00:36:38,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 14.375) internal successors, (345), 24 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:36:38,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:36:38,679 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:36:38,683 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66492b99-3a94-4004-8249-cc06e683b41a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 00:36:38,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66492b99-3a94-4004-8249-cc06e683b41a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:36:38,880 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 00:36:38,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:36:38,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1560267941, now seen corresponding path program 10 times [2023-11-29 00:36:38,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:36:38,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395216906] [2023-11-29 00:36:38,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:36:38,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:36:38,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:36:39,197 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 5 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:36:39,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:36:39,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395216906] [2023-11-29 00:36:39,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395216906] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:36:39,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61936079] [2023-11-29 00:36:39,198 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 00:36:39,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:36:39,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66492b99-3a94-4004-8249-cc06e683b41a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:36:39,199 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66492b99-3a94-4004-8249-cc06e683b41a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:36:39,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66492b99-3a94-4004-8249-cc06e683b41a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 00:36:39,524 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 00:36:39,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:36:39,525 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-29 00:36:39,527 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:36:40,125 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:36:40,126 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:36:41,519 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:36:41,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61936079] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:36:41,520 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:36:41,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 26 [2023-11-29 00:36:41,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695727166] [2023-11-29 00:36:41,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:36:41,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-29 00:36:41,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:36:41,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-29 00:36:41,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2023-11-29 00:36:41,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2023-11-29 00:36:41,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 1147 transitions, 24290 flow. Second operand has 27 states, 27 states have (on average 14.037037037037036) internal successors, (379), 27 states have internal predecessors, (379), 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) [2023-11-29 00:36:41,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:36:41,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2023-11-29 00:36:41,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:37:29,975 WARN L293 SmtUtils]: Spent 6.38s on a formula simplification. DAG size of input: 52 DAG size of output: 41 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 00:37:38,597 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:37:41,266 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.61s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:38:11,085 INFO L124 PetriNetUnfolderBase]: 43559/91460 cut-off events. [2023-11-29 00:38:11,085 INFO L125 PetriNetUnfolderBase]: For 2390612/2397176 co-relation queries the response was YES. [2023-11-29 00:38:12,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 728394 conditions, 91460 events. 43559/91460 cut-off events. For 2390612/2397176 co-relation queries the response was YES. Maximal size of possible extension queue 2637. Compared 1024384 event pairs, 2950 based on Foata normal form. 5816/97206 useless extension candidates. Maximal degree in co-relation 721502. Up to 15387 conditions per place. [2023-11-29 00:38:12,233 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 0 selfloop transitions, 0 changer transitions 2627/2627 dead transitions. [2023-11-29 00:38:12,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 2627 transitions, 56288 flow [2023-11-29 00:38:12,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-11-29 00:38:12,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2023-11-29 00:38:12,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 849 transitions. [2023-11-29 00:38:12,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6228906823184153 [2023-11-29 00:38:12,236 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 849 transitions. [2023-11-29 00:38:12,237 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 849 transitions. [2023-11-29 00:38:12,237 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:38:12,237 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 849 transitions. [2023-11-29 00:38:12,240 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 18.06382978723404) internal successors, (849), 47 states have internal predecessors, (849), 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) [2023-11-29 00:38:12,243 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 29.0) internal successors, (1392), 48 states have internal predecessors, (1392), 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) [2023-11-29 00:38:12,243 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 29.0) internal successors, (1392), 48 states have internal predecessors, (1392), 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) [2023-11-29 00:38:12,243 INFO L175 Difference]: Start difference. First operand has 285 places, 1147 transitions, 24290 flow. Second operand 47 states and 849 transitions. [2023-11-29 00:38:12,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 2627 transitions, 56288 flow [2023-11-29 00:39:21,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 2627 transitions, 54427 flow, removed 765 selfloop flow, removed 10 redundant places. [2023-11-29 00:39:21,642 INFO L231 Difference]: Finished difference. Result has 319 places, 0 transitions, 0 flow [2023-11-29 00:39:21,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=23601, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=0, PETRI_PLACES=319, PETRI_TRANSITIONS=0} [2023-11-29 00:39:21,643 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 290 predicate places. [2023-11-29 00:39:21,643 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 0 transitions, 0 flow [2023-11-29 00:39:21,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 14.037037037037036) internal successors, (379), 27 states have internal predecessors, (379), 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) [2023-11-29 00:39:21,645 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-11-29 00:39:21,646 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-11-29 00:39:21,646 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-11-29 00:39:21,650 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66492b99-3a94-4004-8249-cc06e683b41a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 00:39:21,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66492b99-3a94-4004-8249-cc06e683b41a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:39:21,847 INFO L445 BasicCegarLoop]: Path program histogram: [10, 2, 2, 2, 1, 1, 1, 1] [2023-11-29 00:39:21,849 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-29 00:39:21,849 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-29 00:39:21,852 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 12:39:21 BasicIcfg [2023-11-29 00:39:21,852 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-29 00:39:21,853 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-29 00:39:21,853 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-29 00:39:21,853 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-29 00:39:21,853 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:25:10" (3/4) ... [2023-11-29 00:39:21,855 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-11-29 00:39:21,857 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2023-11-29 00:39:21,857 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2023-11-29 00:39:21,862 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 64 nodes and edges [2023-11-29 00:39:21,862 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2023-11-29 00:39:21,863 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2023-11-29 00:39:21,863 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2023-11-29 00:39:21,935 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66492b99-3a94-4004-8249-cc06e683b41a/bin/uautomizer-verify-BQ2R08f2Ya/witness.graphml [2023-11-29 00:39:21,935 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66492b99-3a94-4004-8249-cc06e683b41a/bin/uautomizer-verify-BQ2R08f2Ya/witness.yml [2023-11-29 00:39:21,935 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-29 00:39:21,936 INFO L158 Benchmark]: Toolchain (without parser) took 851911.66ms. Allocated memory was 159.4MB in the beginning and 6.5GB in the end (delta: 6.4GB). Free memory was 127.3MB in the beginning and 1.1GB in the end (delta: -972.6MB). Peak memory consumption was 5.4GB. Max. memory is 16.1GB. [2023-11-29 00:39:21,936 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 121.6MB. Free memory is still 73.9MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-29 00:39:21,936 INFO L158 Benchmark]: CACSL2BoogieTranslator took 256.63ms. Allocated memory is still 159.4MB. Free memory was 127.3MB in the beginning and 115.8MB in the end (delta: 11.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-29 00:39:21,937 INFO L158 Benchmark]: Boogie Procedure Inliner took 36.48ms. Allocated memory is still 159.4MB. Free memory was 115.8MB in the beginning and 113.9MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-29 00:39:21,937 INFO L158 Benchmark]: Boogie Preprocessor took 44.86ms. Allocated memory is still 159.4MB. Free memory was 113.9MB in the beginning and 111.9MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-29 00:39:21,937 INFO L158 Benchmark]: RCFGBuilder took 497.30ms. Allocated memory is still 159.4MB. Free memory was 111.9MB in the beginning and 84.3MB in the end (delta: 27.6MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. [2023-11-29 00:39:21,938 INFO L158 Benchmark]: TraceAbstraction took 850986.85ms. Allocated memory was 159.4MB in the beginning and 6.5GB in the end (delta: 6.4GB). Free memory was 83.4MB in the beginning and 1.1GB in the end (delta: -1.0GB). Peak memory consumption was 5.9GB. Max. memory is 16.1GB. [2023-11-29 00:39:21,938 INFO L158 Benchmark]: Witness Printer took 82.40ms. Allocated memory is still 6.5GB. Free memory was 1.1GB in the beginning and 1.1GB in the end (delta: 5.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2023-11-29 00:39:21,940 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 121.6MB. Free memory is still 73.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 256.63ms. Allocated memory is still 159.4MB. Free memory was 127.3MB in the beginning and 115.8MB in the end (delta: 11.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 36.48ms. Allocated memory is still 159.4MB. Free memory was 115.8MB in the beginning and 113.9MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 44.86ms. Allocated memory is still 159.4MB. Free memory was 113.9MB in the beginning and 111.9MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 497.30ms. Allocated memory is still 159.4MB. Free memory was 111.9MB in the beginning and 84.3MB in the end (delta: 27.6MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. * TraceAbstraction took 850986.85ms. Allocated memory was 159.4MB in the beginning and 6.5GB in the end (delta: 6.4GB). Free memory was 83.4MB in the beginning and 1.1GB in the end (delta: -1.0GB). Peak memory consumption was 5.9GB. Max. memory is 16.1GB. * Witness Printer took 82.40ms. Allocated memory is still 6.5GB. Free memory was 1.1GB in the beginning and 1.1GB in the end (delta: 5.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 99]: 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, 42 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: 850.9s, OverallIterations: 20, TraceHistogramMax: 5, PathProgramHistogramMax: 10, EmptinessCheckTime: 0.0s, AutomataDifference: 834.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 12 mSolverCounterUnknown, 2430 SdHoareTripleChecker+Valid, 172.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2409 mSDsluCounter, 361 SdHoareTripleChecker+Invalid, 169.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 332 mSDsCounter, 231 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 8593 IncrementalHoareTripleChecker+Invalid, 8836 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 231 mSolverCounterUnsat, 29 mSDtfsCounter, 8593 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 966 GetRequests, 604 SyntacticMatches, 59 SemanticMatches, 303 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4339 ImplicationChecksByTransitivity, 433.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24290occurred in iteration=19, InterpolantAutomatonStates: 282, 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: 0.2s SsaConstructionTime, 1.4s SatisfiabilityAnalysisTime, 11.7s InterpolantComputationTime, 914 NumberOfCodeBlocks, 910 NumberOfCodeBlocksAsserted, 45 NumberOfCheckSat, 1226 ConstructedInterpolants, 0 QuantifiedInterpolants, 14491 SizeOfPredicates, 45 NumberOfNonLiveVariables, 1603 ConjunctsInSsa, 116 ConjunctsInUnsatCore, 42 InterpolantComputations, 9 PerfectInterpolantSequences, 137/607 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! [2023-11-29 00:39:21,955 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66492b99-3a94-4004-8249-cc06e683b41a/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE