./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b89800-b925-43dc-8fd3-9178c2571a57/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b89800-b925-43dc-8fd3-9178c2571a57/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_a8b89800-b925-43dc-8fd3-9178c2571a57/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b89800-b925-43dc-8fd3-9178c2571a57/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b89800-b925-43dc-8fd3-9178c2571a57/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_a8b89800-b925-43dc-8fd3-9178c2571a57/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 6b30bad195dde021066febd52c7985271e0448c265b66e6efcbd9c3306420e73 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-28 20:37:57,161 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-28 20:37:57,223 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b89800-b925-43dc-8fd3-9178c2571a57/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-28 20:37:57,227 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-28 20:37:57,228 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-28 20:37:57,251 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-28 20:37:57,251 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-28 20:37:57,252 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-28 20:37:57,252 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-28 20:37:57,253 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-28 20:37:57,253 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-28 20:37:57,254 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-28 20:37:57,255 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-28 20:37:57,255 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-28 20:37:57,256 INFO L153 SettingsManager]: * Use SBE=true [2023-11-28 20:37:57,256 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-28 20:37:57,257 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-28 20:37:57,257 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-28 20:37:57,258 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-28 20:37:57,258 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-28 20:37:57,259 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-28 20:37:57,260 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-28 20:37:57,260 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-28 20:37:57,260 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-28 20:37:57,261 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-28 20:37:57,261 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-28 20:37:57,262 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-28 20:37:57,262 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-28 20:37:57,263 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-28 20:37:57,263 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-28 20:37:57,264 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-28 20:37:57,264 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 20:37:57,264 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-28 20:37:57,265 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-28 20:37:57,265 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-28 20:37:57,265 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-28 20:37:57,265 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-28 20:37:57,265 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-28 20:37:57,265 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-28 20:37:57,266 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-28 20:37:57,266 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-28 20:37:57,266 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-28 20:37:57,266 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_a8b89800-b925-43dc-8fd3-9178c2571a57/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b89800-b925-43dc-8fd3-9178c2571a57/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6b30bad195dde021066febd52c7985271e0448c265b66e6efcbd9c3306420e73 [2023-11-28 20:37:57,459 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-28 20:37:57,479 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-28 20:37:57,481 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-28 20:37:57,482 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-28 20:37:57,482 INFO L274 PluginConnector]: CDTParser initialized [2023-11-28 20:37:57,483 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b89800-b925-43dc-8fd3-9178c2571a57/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c [2023-11-28 20:38:00,210 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-28 20:38:00,434 INFO L384 CDTParser]: Found 1 translation units. [2023-11-28 20:38:00,434 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b89800-b925-43dc-8fd3-9178c2571a57/sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c [2023-11-28 20:38:00,443 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b89800-b925-43dc-8fd3-9178c2571a57/bin/uautomizer-verify-BQ2R08f2Ya/data/d49591b86/c72c8a10c0634ed1aa3af78ad1c4cfe7/FLAG010256321 [2023-11-28 20:38:00,457 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b89800-b925-43dc-8fd3-9178c2571a57/bin/uautomizer-verify-BQ2R08f2Ya/data/d49591b86/c72c8a10c0634ed1aa3af78ad1c4cfe7 [2023-11-28 20:38:00,460 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-28 20:38:00,461 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-28 20:38:00,463 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-28 20:38:00,463 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-28 20:38:00,468 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-28 20:38:00,469 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:38:00" (1/1) ... [2023-11-28 20:38:00,470 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15d4a6a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:38:00, skipping insertion in model container [2023-11-28 20:38:00,470 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:38:00" (1/1) ... [2023-11-28 20:38:00,495 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-28 20:38:00,667 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_a8b89800-b925-43dc-8fd3-9178c2571a57/sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c[2502,2515] [2023-11-28 20:38:00,672 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 20:38:00,682 INFO L202 MainTranslator]: Completed pre-run [2023-11-28 20:38:00,703 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_a8b89800-b925-43dc-8fd3-9178c2571a57/sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c[2502,2515] [2023-11-28 20:38:00,704 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 20:38:00,712 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-28 20:38:00,713 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-28 20:38:00,721 INFO L206 MainTranslator]: Completed translation [2023-11-28 20:38:00,721 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:38:00 WrapperNode [2023-11-28 20:38:00,721 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-28 20:38:00,722 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-28 20:38:00,723 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-28 20:38:00,723 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-28 20:38:00,730 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:38:00" (1/1) ... [2023-11-28 20:38:00,738 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:38:00" (1/1) ... [2023-11-28 20:38:00,758 INFO L138 Inliner]: procedures = 21, calls = 34, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 60 [2023-11-28 20:38:00,758 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-28 20:38:00,759 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-28 20:38:00,759 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-28 20:38:00,759 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-28 20:38:00,770 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:38:00" (1/1) ... [2023-11-28 20:38:00,770 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:38:00" (1/1) ... [2023-11-28 20:38:00,772 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:38:00" (1/1) ... [2023-11-28 20:38:00,787 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]. [2023-11-28 20:38:00,787 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:38:00" (1/1) ... [2023-11-28 20:38:00,787 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:38:00" (1/1) ... [2023-11-28 20:38:00,793 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:38:00" (1/1) ... [2023-11-28 20:38:00,796 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:38:00" (1/1) ... [2023-11-28 20:38:00,797 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:38:00" (1/1) ... [2023-11-28 20:38:00,799 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:38:00" (1/1) ... [2023-11-28 20:38:00,801 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-28 20:38:00,802 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-28 20:38:00,803 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-28 20:38:00,803 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-28 20:38:00,803 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:38:00" (1/1) ... [2023-11-28 20:38:00,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 20:38:00,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b89800-b925-43dc-8fd3-9178c2571a57/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:38:00,834 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b89800-b925-43dc-8fd3-9178c2571a57/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-28 20:38:00,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b89800-b925-43dc-8fd3-9178c2571a57/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-28 20:38:00,869 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-28 20:38:00,869 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-28 20:38:00,869 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-28 20:38:00,870 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-28 20:38:00,870 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-28 20:38:00,870 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-28 20:38:00,870 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-28 20:38:00,870 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-28 20:38:00,870 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-28 20:38:00,870 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-28 20:38:00,870 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-28 20:38:00,871 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-28 20:38:00,871 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-28 20:38:00,871 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-28 20:38:00,871 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-28 20:38:00,871 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-28 20:38:00,871 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-28 20:38:00,871 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-28 20:38:00,871 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-28 20:38:00,872 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-28 20:38:00,873 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-28 20:38:00,980 INFO L241 CfgBuilder]: Building ICFG [2023-11-28 20:38:00,982 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-28 20:38:01,150 INFO L282 CfgBuilder]: Performing block encoding [2023-11-28 20:38:01,297 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-28 20:38:01,297 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-28 20:38:01,298 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:38:01 BoogieIcfgContainer [2023-11-28 20:38:01,298 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-28 20:38:01,301 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-28 20:38:01,301 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-28 20:38:01,304 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-28 20:38:01,304 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 08:38:00" (1/3) ... [2023-11-28 20:38:01,305 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55af40ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 08:38:01, skipping insertion in model container [2023-11-28 20:38:01,305 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:38:00" (2/3) ... [2023-11-28 20:38:01,306 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55af40ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 08:38:01, skipping insertion in model container [2023-11-28 20:38:01,306 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:38:01" (3/3) ... [2023-11-28 20:38:01,307 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-threaded-sum-2.wvr.c [2023-11-28 20:38:01,314 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-28 20:38:01,324 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-28 20:38:01,324 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-28 20:38:01,324 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-28 20:38:01,363 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-28 20:38:01,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 31 places, 26 transitions, 66 flow [2023-11-28 20:38:01,418 INFO L124 PetriNetUnfolderBase]: 2/24 cut-off events. [2023-11-28 20:38:01,418 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-28 20:38:01,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33 conditions, 24 events. 2/24 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 28 event pairs, 0 based on Foata normal form. 0/21 useless extension candidates. Maximal degree in co-relation 18. Up to 2 conditions per place. [2023-11-28 20:38:01,422 INFO L82 GeneralOperation]: Start removeDead. Operand has 31 places, 26 transitions, 66 flow [2023-11-28 20:38:01,425 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 28 places, 23 transitions, 58 flow [2023-11-28 20:38:01,449 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-28 20:38:01,456 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;@2070f48, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-28 20:38:01,457 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-28 20:38:01,469 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-28 20:38:01,469 INFO L124 PetriNetUnfolderBase]: 2/22 cut-off events. [2023-11-28 20:38:01,469 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-28 20:38:01,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:38:01,470 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:38:01,471 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-28 20:38:01,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:38:01,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1773029837, now seen corresponding path program 1 times [2023-11-28 20:38:01,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:38:01,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39452867] [2023-11-28 20:38:01,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:38:01,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:38:01,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:38:01,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:38:01,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:38:01,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39452867] [2023-11-28 20:38:01,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39452867] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:38:01,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:38:01,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 20:38:01,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295757151] [2023-11-28 20:38:01,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:38:01,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 20:38:01,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:38:02,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 20:38:02,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-28 20:38:02,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 26 [2023-11-28 20:38:02,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 23 transitions, 58 flow. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 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) [2023-11-28 20:38:02,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:38:02,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 26 [2023-11-28 20:38:02,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:38:02,169 INFO L124 PetriNetUnfolderBase]: 69/157 cut-off events. [2023-11-28 20:38:02,170 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2023-11-28 20:38:02,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 310 conditions, 157 events. 69/157 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 645 event pairs, 6 based on Foata normal form. 8/159 useless extension candidates. Maximal degree in co-relation 227. Up to 79 conditions per place. [2023-11-28 20:38:02,174 INFO L140 encePairwiseOnDemand]: 22/26 looper letters, 25 selfloop transitions, 3 changer transitions 0/35 dead transitions. [2023-11-28 20:38:02,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 35 transitions, 144 flow [2023-11-28 20:38:02,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 20:38:02,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-28 20:38:02,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 65 transitions. [2023-11-28 20:38:02,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2023-11-28 20:38:02,188 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 65 transitions. [2023-11-28 20:38:02,188 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 65 transitions. [2023-11-28 20:38:02,189 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:38:02,192 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 65 transitions. [2023-11-28 20:38:02,194 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 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) [2023-11-28 20:38:02,197 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 26.0) internal successors, (130), 5 states have internal predecessors, (130), 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) [2023-11-28 20:38:02,198 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 26.0) internal successors, (130), 5 states have internal predecessors, (130), 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) [2023-11-28 20:38:02,200 INFO L175 Difference]: Start difference. First operand has 28 places, 23 transitions, 58 flow. Second operand 4 states and 65 transitions. [2023-11-28 20:38:02,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 35 transitions, 144 flow [2023-11-28 20:38:02,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 35 transitions, 132 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-28 20:38:02,206 INFO L231 Difference]: Finished difference. Result has 28 places, 24 transitions, 64 flow [2023-11-28 20:38:02,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=64, PETRI_PLACES=28, PETRI_TRANSITIONS=24} [2023-11-28 20:38:02,211 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 0 predicate places. [2023-11-28 20:38:02,211 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 24 transitions, 64 flow [2023-11-28 20:38:02,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 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) [2023-11-28 20:38:02,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:38:02,212 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] [2023-11-28 20:38:02,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-28 20:38:02,213 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-28 20:38:02,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:38:02,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1935858214, now seen corresponding path program 1 times [2023-11-28 20:38:02,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:38:02,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279892042] [2023-11-28 20:38:02,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:38:02,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:38:02,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:38:02,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-28 20:38:02,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:38:02,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279892042] [2023-11-28 20:38:02,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279892042] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:38:02,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:38:02,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 20:38:02,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495143628] [2023-11-28 20:38:02,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:38:02,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 20:38:02,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:38:02,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 20:38:02,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-28 20:38:02,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 26 [2023-11-28 20:38:02,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 24 transitions, 64 flow. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 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) [2023-11-28 20:38:02,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:38:02,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 26 [2023-11-28 20:38:02,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:38:02,643 INFO L124 PetriNetUnfolderBase]: 84/178 cut-off events. [2023-11-28 20:38:02,643 INFO L125 PetriNetUnfolderBase]: For 20/29 co-relation queries the response was YES. [2023-11-28 20:38:02,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 379 conditions, 178 events. 84/178 cut-off events. For 20/29 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 600 event pairs, 12 based on Foata normal form. 13/188 useless extension candidates. Maximal degree in co-relation 115. Up to 138 conditions per place. [2023-11-28 20:38:02,646 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 22 selfloop transitions, 5 changer transitions 0/34 dead transitions. [2023-11-28 20:38:02,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 34 transitions, 140 flow [2023-11-28 20:38:02,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 20:38:02,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-28 20:38:02,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 63 transitions. [2023-11-28 20:38:02,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6057692307692307 [2023-11-28 20:38:02,649 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 63 transitions. [2023-11-28 20:38:02,650 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 63 transitions. [2023-11-28 20:38:02,650 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:38:02,650 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 63 transitions. [2023-11-28 20:38:02,651 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 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) [2023-11-28 20:38:02,652 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 26.0) internal successors, (130), 5 states have internal predecessors, (130), 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) [2023-11-28 20:38:02,653 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 26.0) internal successors, (130), 5 states have internal predecessors, (130), 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) [2023-11-28 20:38:02,653 INFO L175 Difference]: Start difference. First operand has 28 places, 24 transitions, 64 flow. Second operand 4 states and 63 transitions. [2023-11-28 20:38:02,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 34 transitions, 140 flow [2023-11-28 20:38:02,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 34 transitions, 136 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-28 20:38:02,656 INFO L231 Difference]: Finished difference. Result has 31 places, 28 transitions, 92 flow [2023-11-28 20:38:02,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=92, PETRI_PLACES=31, PETRI_TRANSITIONS=28} [2023-11-28 20:38:02,657 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 3 predicate places. [2023-11-28 20:38:02,658 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 28 transitions, 92 flow [2023-11-28 20:38:02,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 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) [2023-11-28 20:38:02,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:38:02,658 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] [2023-11-28 20:38:02,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-28 20:38:02,659 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-28 20:38:02,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:38:02,660 INFO L85 PathProgramCache]: Analyzing trace with hash -603492214, now seen corresponding path program 2 times [2023-11-28 20:38:02,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:38:02,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578164915] [2023-11-28 20:38:02,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:38:02,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:38:02,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:38:02,869 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:38:02,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:38:02,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578164915] [2023-11-28 20:38:02,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578164915] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:38:02,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:38:02,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-28 20:38:02,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382120371] [2023-11-28 20:38:02,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:38:02,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-28 20:38:02,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:38:02,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-28 20:38:02,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-28 20:38:02,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 26 [2023-11-28 20:38:02,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 28 transitions, 92 flow. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 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) [2023-11-28 20:38:02,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:38:02,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 26 [2023-11-28 20:38:02,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:38:03,039 INFO L124 PetriNetUnfolderBase]: 90/188 cut-off events. [2023-11-28 20:38:03,040 INFO L125 PetriNetUnfolderBase]: For 88/101 co-relation queries the response was YES. [2023-11-28 20:38:03,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 466 conditions, 188 events. 90/188 cut-off events. For 88/101 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 673 event pairs, 17 based on Foata normal form. 19/203 useless extension candidates. Maximal degree in co-relation 162. Up to 83 conditions per place. [2023-11-28 20:38:03,043 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 30 selfloop transitions, 6 changer transitions 0/43 dead transitions. [2023-11-28 20:38:03,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 43 transitions, 211 flow [2023-11-28 20:38:03,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-28 20:38:03,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-28 20:38:03,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 80 transitions. [2023-11-28 20:38:03,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6153846153846154 [2023-11-28 20:38:03,045 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 80 transitions. [2023-11-28 20:38:03,045 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 80 transitions. [2023-11-28 20:38:03,046 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:38:03,046 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 80 transitions. [2023-11-28 20:38:03,047 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 16.0) internal successors, (80), 5 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) [2023-11-28 20:38:03,047 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 26.0) internal successors, (156), 6 states have internal predecessors, (156), 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) [2023-11-28 20:38:03,048 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 26.0) internal successors, (156), 6 states have internal predecessors, (156), 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) [2023-11-28 20:38:03,048 INFO L175 Difference]: Start difference. First operand has 31 places, 28 transitions, 92 flow. Second operand 5 states and 80 transitions. [2023-11-28 20:38:03,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 43 transitions, 211 flow [2023-11-28 20:38:03,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 43 transitions, 211 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-28 20:38:03,051 INFO L231 Difference]: Finished difference. Result has 38 places, 31 transitions, 131 flow [2023-11-28 20:38:03,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=131, PETRI_PLACES=38, PETRI_TRANSITIONS=31} [2023-11-28 20:38:03,052 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 10 predicate places. [2023-11-28 20:38:03,052 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 31 transitions, 131 flow [2023-11-28 20:38:03,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 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) [2023-11-28 20:38:03,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:38:03,053 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] [2023-11-28 20:38:03,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-28 20:38:03,053 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-28 20:38:03,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:38:03,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1239185092, now seen corresponding path program 3 times [2023-11-28 20:38:03,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:38:03,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478989527] [2023-11-28 20:38:03,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:38:03,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:38:03,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:38:03,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:38:03,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:38:03,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478989527] [2023-11-28 20:38:03,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478989527] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:38:03,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654114329] [2023-11-28 20:38:03,839 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-28 20:38:03,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:38:03,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b89800-b925-43dc-8fd3-9178c2571a57/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:38:03,841 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b89800-b925-43dc-8fd3-9178c2571a57/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:38:03,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b89800-b925-43dc-8fd3-9178c2571a57/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-28 20:38:03,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-28 20:38:03,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:38:03,964 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-28 20:38:03,970 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:38:04,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:38:04,371 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:38:04,800 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:38:04,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654114329] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:38:04,800 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:38:04,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2023-11-28 20:38:04,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189362372] [2023-11-28 20:38:04,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:38:04,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-28 20:38:04,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:38:04,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-28 20:38:04,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2023-11-28 20:38:04,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 26 [2023-11-28 20:38:04,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 31 transitions, 131 flow. Second operand has 17 states, 17 states have (on average 10.470588235294118) internal successors, (178), 17 states have internal predecessors, (178), 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) [2023-11-28 20:38:04,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:38:04,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 26 [2023-11-28 20:38:04,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:38:06,927 INFO L124 PetriNetUnfolderBase]: 519/1012 cut-off events. [2023-11-28 20:38:06,927 INFO L125 PetriNetUnfolderBase]: For 708/733 co-relation queries the response was YES. [2023-11-28 20:38:06,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2692 conditions, 1012 events. 519/1012 cut-off events. For 708/733 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 5434 event pairs, 8 based on Foata normal form. 20/1027 useless extension candidates. Maximal degree in co-relation 1040. Up to 211 conditions per place. [2023-11-28 20:38:06,936 INFO L140 encePairwiseOnDemand]: 17/26 looper letters, 104 selfloop transitions, 62 changer transitions 28/200 dead transitions. [2023-11-28 20:38:06,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 200 transitions, 1139 flow [2023-11-28 20:38:06,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-28 20:38:06,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-28 20:38:06,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 428 transitions. [2023-11-28 20:38:06,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487179487179488 [2023-11-28 20:38:06,941 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 428 transitions. [2023-11-28 20:38:06,941 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 428 transitions. [2023-11-28 20:38:06,942 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:38:06,942 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 428 transitions. [2023-11-28 20:38:06,944 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 14.266666666666667) internal successors, (428), 30 states have internal predecessors, (428), 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) [2023-11-28 20:38:06,948 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 26.0) internal successors, (806), 31 states have internal predecessors, (806), 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) [2023-11-28 20:38:06,949 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 26.0) internal successors, (806), 31 states have internal predecessors, (806), 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) [2023-11-28 20:38:06,949 INFO L175 Difference]: Start difference. First operand has 38 places, 31 transitions, 131 flow. Second operand 30 states and 428 transitions. [2023-11-28 20:38:06,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 200 transitions, 1139 flow [2023-11-28 20:38:06,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 200 transitions, 1124 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-11-28 20:38:06,958 INFO L231 Difference]: Finished difference. Result has 84 places, 93 transitions, 661 flow [2023-11-28 20:38:06,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=661, PETRI_PLACES=84, PETRI_TRANSITIONS=93} [2023-11-28 20:38:06,959 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 56 predicate places. [2023-11-28 20:38:06,959 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 93 transitions, 661 flow [2023-11-28 20:38:06,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 10.470588235294118) internal successors, (178), 17 states have internal predecessors, (178), 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) [2023-11-28 20:38:06,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:38:06,960 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] [2023-11-28 20:38:06,970 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b89800-b925-43dc-8fd3-9178c2571a57/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-28 20:38:07,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b89800-b925-43dc-8fd3-9178c2571a57/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:38:07,166 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-28 20:38:07,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:38:07,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1427579381, now seen corresponding path program 4 times [2023-11-28 20:38:07,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:38:07,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151502607] [2023-11-28 20:38:07,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:38:07,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:38:07,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:38:07,365 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:38:07,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:38:07,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151502607] [2023-11-28 20:38:07,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151502607] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:38:07,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:38:07,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-28 20:38:07,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053993070] [2023-11-28 20:38:07,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:38:07,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-28 20:38:07,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:38:07,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-28 20:38:07,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-28 20:38:07,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 26 [2023-11-28 20:38:07,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 93 transitions, 661 flow. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 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) [2023-11-28 20:38:07,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:38:07,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 26 [2023-11-28 20:38:07,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:38:07,755 INFO L124 PetriNetUnfolderBase]: 787/1381 cut-off events. [2023-11-28 20:38:07,755 INFO L125 PetriNetUnfolderBase]: For 6066/6194 co-relation queries the response was YES. [2023-11-28 20:38:07,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5174 conditions, 1381 events. 787/1381 cut-off events. For 6066/6194 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 6714 event pairs, 4 based on Foata normal form. 24/1404 useless extension candidates. Maximal degree in co-relation 5129. Up to 367 conditions per place. [2023-11-28 20:38:07,770 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 148 selfloop transitions, 64 changer transitions 0/221 dead transitions. [2023-11-28 20:38:07,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 221 transitions, 1964 flow [2023-11-28 20:38:07,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-28 20:38:07,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-28 20:38:07,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 114 transitions. [2023-11-28 20:38:07,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48717948717948717 [2023-11-28 20:38:07,772 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 114 transitions. [2023-11-28 20:38:07,772 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 114 transitions. [2023-11-28 20:38:07,772 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:38:07,772 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 114 transitions. [2023-11-28 20:38:07,773 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2023-11-28 20:38:07,774 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 26.0) internal successors, (260), 10 states have internal predecessors, (260), 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) [2023-11-28 20:38:07,774 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 26.0) internal successors, (260), 10 states have internal predecessors, (260), 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) [2023-11-28 20:38:07,774 INFO L175 Difference]: Start difference. First operand has 84 places, 93 transitions, 661 flow. Second operand 9 states and 114 transitions. [2023-11-28 20:38:07,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 221 transitions, 1964 flow [2023-11-28 20:38:07,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 221 transitions, 1737 flow, removed 102 selfloop flow, removed 8 redundant places. [2023-11-28 20:38:07,796 INFO L231 Difference]: Finished difference. Result has 86 places, 134 transitions, 1115 flow [2023-11-28 20:38:07,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=562, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1115, PETRI_PLACES=86, PETRI_TRANSITIONS=134} [2023-11-28 20:38:07,797 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 58 predicate places. [2023-11-28 20:38:07,797 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 134 transitions, 1115 flow [2023-11-28 20:38:07,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 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) [2023-11-28 20:38:07,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:38:07,797 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:38:07,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-28 20:38:07,798 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-28 20:38:07,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:38:07,798 INFO L85 PathProgramCache]: Analyzing trace with hash 987076830, now seen corresponding path program 1 times [2023-11-28 20:38:07,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:38:07,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949973560] [2023-11-28 20:38:07,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:38:07,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:38:07,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:38:09,001 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:38:09,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:38:09,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949973560] [2023-11-28 20:38:09,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949973560] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:38:09,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328435552] [2023-11-28 20:38:09,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:38:09,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:38:09,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b89800-b925-43dc-8fd3-9178c2571a57/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:38:09,003 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b89800-b925-43dc-8fd3-9178c2571a57/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:38:09,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b89800-b925-43dc-8fd3-9178c2571a57/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-28 20:38:09,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:38:09,156 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-28 20:38:09,159 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:38:10,005 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:38:10,005 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:38:11,444 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:38:11,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328435552] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:38:11,444 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:38:11,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 22 [2023-11-28 20:38:11,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966766752] [2023-11-28 20:38:11,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:38:11,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-28 20:38:11,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:38:11,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-28 20:38:11,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2023-11-28 20:38:11,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 26 [2023-11-28 20:38:11,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 134 transitions, 1115 flow. Second operand has 23 states, 23 states have (on average 10.173913043478262) internal successors, (234), 23 states have internal predecessors, (234), 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) [2023-11-28 20:38:11,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:38:11,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 26 [2023-11-28 20:38:11,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:38:19,415 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-28 20:38:22,784 INFO L124 PetriNetUnfolderBase]: 1632/3178 cut-off events. [2023-11-28 20:38:22,784 INFO L125 PetriNetUnfolderBase]: For 15023/15215 co-relation queries the response was YES. [2023-11-28 20:38:22,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13329 conditions, 3178 events. 1632/3178 cut-off events. For 15023/15215 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 21302 event pairs, 24 based on Foata normal form. 135/3300 useless extension candidates. Maximal degree in co-relation 11099. Up to 797 conditions per place. [2023-11-28 20:38:22,815 INFO L140 encePairwiseOnDemand]: 17/26 looper letters, 254 selfloop transitions, 177 changer transitions 59/500 dead transitions. [2023-11-28 20:38:22,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 500 transitions, 4716 flow [2023-11-28 20:38:22,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-11-28 20:38:22,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2023-11-28 20:38:22,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 683 transitions. [2023-11-28 20:38:22,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5253846153846153 [2023-11-28 20:38:22,820 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 683 transitions. [2023-11-28 20:38:22,820 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 683 transitions. [2023-11-28 20:38:22,821 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:38:22,822 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 683 transitions. [2023-11-28 20:38:22,825 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 13.66) internal successors, (683), 50 states have internal predecessors, (683), 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) [2023-11-28 20:38:22,828 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 26.0) internal successors, (1326), 51 states have internal predecessors, (1326), 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) [2023-11-28 20:38:22,829 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 26.0) internal successors, (1326), 51 states have internal predecessors, (1326), 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) [2023-11-28 20:38:22,829 INFO L175 Difference]: Start difference. First operand has 86 places, 134 transitions, 1115 flow. Second operand 50 states and 683 transitions. [2023-11-28 20:38:22,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 500 transitions, 4716 flow [2023-11-28 20:38:22,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 500 transitions, 4688 flow, removed 12 selfloop flow, removed 1 redundant places. [2023-11-28 20:38:22,893 INFO L231 Difference]: Finished difference. Result has 156 places, 294 transitions, 3269 flow [2023-11-28 20:38:22,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=1109, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=3269, PETRI_PLACES=156, PETRI_TRANSITIONS=294} [2023-11-28 20:38:22,894 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 128 predicate places. [2023-11-28 20:38:22,894 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 294 transitions, 3269 flow [2023-11-28 20:38:22,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 10.173913043478262) internal successors, (234), 23 states have internal predecessors, (234), 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) [2023-11-28 20:38:22,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:38:22,894 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:38:22,899 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b89800-b925-43dc-8fd3-9178c2571a57/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-28 20:38:23,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b89800-b925-43dc-8fd3-9178c2571a57/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:38:23,095 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-28 20:38:23,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:38:23,095 INFO L85 PathProgramCache]: Analyzing trace with hash -841882926, now seen corresponding path program 2 times [2023-11-28 20:38:23,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:38:23,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854913004] [2023-11-28 20:38:23,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:38:23,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:38:23,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:38:24,370 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:38:24,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:38:24,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854913004] [2023-11-28 20:38:24,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854913004] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:38:24,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843313358] [2023-11-28 20:38:24,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-28 20:38:24,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:38:24,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b89800-b925-43dc-8fd3-9178c2571a57/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:38:24,374 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b89800-b925-43dc-8fd3-9178c2571a57/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:38:24,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b89800-b925-43dc-8fd3-9178c2571a57/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-28 20:38:24,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-28 20:38:24,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:38:24,515 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-28 20:38:24,516 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:38:25,313 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:38:25,313 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:38:33,391 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:38:33,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843313358] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:38:33,392 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:38:33,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-11-28 20:38:33,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632462264] [2023-11-28 20:38:33,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:38:33,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-28 20:38:33,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:38:33,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-28 20:38:33,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=434, Unknown=1, NotChecked=0, Total=552 [2023-11-28 20:38:34,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 26 [2023-11-28 20:38:34,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 294 transitions, 3269 flow. Second operand has 24 states, 24 states have (on average 10.125) internal successors, (243), 24 states have internal predecessors, (243), 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) [2023-11-28 20:38:34,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:38:34,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 26 [2023-11-28 20:38:34,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:38:49,770 INFO L124 PetriNetUnfolderBase]: 2400/4679 cut-off events. [2023-11-28 20:38:49,771 INFO L125 PetriNetUnfolderBase]: For 29502/29938 co-relation queries the response was YES. [2023-11-28 20:38:49,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22900 conditions, 4679 events. 2400/4679 cut-off events. For 29502/29938 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 33400 event pairs, 38 based on Foata normal form. 288/4949 useless extension candidates. Maximal degree in co-relation 22787. Up to 1229 conditions per place. [2023-11-28 20:38:49,816 INFO L140 encePairwiseOnDemand]: 17/26 looper letters, 303 selfloop transitions, 252 changer transitions 91/656 dead transitions. [2023-11-28 20:38:49,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 656 transitions, 7740 flow [2023-11-28 20:38:49,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-11-28 20:38:49,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-11-28 20:38:49,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 627 transitions. [2023-11-28 20:38:49,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5358974358974359 [2023-11-28 20:38:49,821 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 627 transitions. [2023-11-28 20:38:49,821 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 627 transitions. [2023-11-28 20:38:49,822 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:38:49,822 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 627 transitions. [2023-11-28 20:38:49,824 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 13.933333333333334) internal successors, (627), 45 states have internal predecessors, (627), 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) [2023-11-28 20:38:49,827 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 26.0) internal successors, (1196), 46 states have internal predecessors, (1196), 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) [2023-11-28 20:38:49,828 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 26.0) internal successors, (1196), 46 states have internal predecessors, (1196), 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) [2023-11-28 20:38:49,828 INFO L175 Difference]: Start difference. First operand has 156 places, 294 transitions, 3269 flow. Second operand 45 states and 627 transitions. [2023-11-28 20:38:49,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 656 transitions, 7740 flow [2023-11-28 20:38:49,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 656 transitions, 7358 flow, removed 171 selfloop flow, removed 17 redundant places. [2023-11-28 20:38:49,993 INFO L231 Difference]: Finished difference. Result has 195 places, 423 transitions, 5458 flow [2023-11-28 20:38:49,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=3043, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=5458, PETRI_PLACES=195, PETRI_TRANSITIONS=423} [2023-11-28 20:38:49,994 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 167 predicate places. [2023-11-28 20:38:49,994 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 423 transitions, 5458 flow [2023-11-28 20:38:49,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 10.125) internal successors, (243), 24 states have internal predecessors, (243), 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) [2023-11-28 20:38:49,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:38:49,995 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:38:49,999 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b89800-b925-43dc-8fd3-9178c2571a57/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-28 20:38:50,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b89800-b925-43dc-8fd3-9178c2571a57/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-28 20:38:50,196 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-28 20:38:50,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:38:50,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1065845570, now seen corresponding path program 3 times [2023-11-28 20:38:50,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:38:50,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786584184] [2023-11-28 20:38:50,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:38:50,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:38:50,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:38:51,163 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:38:51,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:38:51,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786584184] [2023-11-28 20:38:51,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786584184] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:38:51,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622122869] [2023-11-28 20:38:51,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-28 20:38:51,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:38:51,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b89800-b925-43dc-8fd3-9178c2571a57/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:38:51,166 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b89800-b925-43dc-8fd3-9178c2571a57/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:38:51,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b89800-b925-43dc-8fd3-9178c2571a57/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-28 20:38:51,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-28 20:38:51,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:38:51,317 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-28 20:38:51,318 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:38:52,431 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:38:52,431 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:38:53,670 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:38:53,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622122869] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:38:53,670 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:38:53,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2023-11-28 20:38:53,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956452775] [2023-11-28 20:38:53,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:38:53,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-28 20:38:53,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:38:53,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-28 20:38:53,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=638, Unknown=0, NotChecked=0, Total=812 [2023-11-28 20:38:54,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 26 [2023-11-28 20:38:54,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 423 transitions, 5458 flow. Second operand has 29 states, 29 states have (on average 10.068965517241379) internal successors, (292), 29 states have internal predecessors, (292), 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) [2023-11-28 20:38:54,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:38:54,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 26 [2023-11-28 20:38:54,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:39:09,044 INFO L124 PetriNetUnfolderBase]: 3344/6477 cut-off events. [2023-11-28 20:39:09,044 INFO L125 PetriNetUnfolderBase]: For 47985/48655 co-relation queries the response was YES. [2023-11-28 20:39:09,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35190 conditions, 6477 events. 3344/6477 cut-off events. For 47985/48655 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 49120 event pairs, 40 based on Foata normal form. 495/6964 useless extension candidates. Maximal degree in co-relation 35023. Up to 2034 conditions per place. [2023-11-28 20:39:09,149 INFO L140 encePairwiseOnDemand]: 17/26 looper letters, 423 selfloop transitions, 359 changer transitions 113/905 dead transitions. [2023-11-28 20:39:09,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 905 transitions, 12199 flow [2023-11-28 20:39:09,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2023-11-28 20:39:09,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2023-11-28 20:39:09,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 863 transitions. [2023-11-28 20:39:09,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5268620268620269 [2023-11-28 20:39:09,152 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 863 transitions. [2023-11-28 20:39:09,152 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 863 transitions. [2023-11-28 20:39:09,153 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:39:09,153 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 863 transitions. [2023-11-28 20:39:09,156 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 13.698412698412698) internal successors, (863), 63 states have internal predecessors, (863), 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) [2023-11-28 20:39:09,160 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 26.0) internal successors, (1664), 64 states have internal predecessors, (1664), 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) [2023-11-28 20:39:09,160 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 26.0) internal successors, (1664), 64 states have internal predecessors, (1664), 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) [2023-11-28 20:39:09,160 INFO L175 Difference]: Start difference. First operand has 195 places, 423 transitions, 5458 flow. Second operand 63 states and 863 transitions. [2023-11-28 20:39:09,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 905 transitions, 12199 flow [2023-11-28 20:39:09,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 905 transitions, 11787 flow, removed 144 selfloop flow, removed 24 redundant places. [2023-11-28 20:39:09,497 INFO L231 Difference]: Finished difference. Result has 246 places, 630 transitions, 9502 flow [2023-11-28 20:39:09,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=5263, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=9502, PETRI_PLACES=246, PETRI_TRANSITIONS=630} [2023-11-28 20:39:09,498 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 218 predicate places. [2023-11-28 20:39:09,499 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 630 transitions, 9502 flow [2023-11-28 20:39:09,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 10.068965517241379) internal successors, (292), 29 states have internal predecessors, (292), 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) [2023-11-28 20:39:09,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:39:09,499 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:39:09,503 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b89800-b925-43dc-8fd3-9178c2571a57/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-28 20:39:09,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b89800-b925-43dc-8fd3-9178c2571a57/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-28 20:39:09,700 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-28 20:39:09,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:39:09,700 INFO L85 PathProgramCache]: Analyzing trace with hash 930119302, now seen corresponding path program 4 times [2023-11-28 20:39:09,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:39:09,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578860796] [2023-11-28 20:39:09,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:39:09,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:39:09,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:39:11,219 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:39:11,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:39:11,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578860796] [2023-11-28 20:39:11,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578860796] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:39:11,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989155365] [2023-11-28 20:39:11,219 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-28 20:39:11,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:39:11,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b89800-b925-43dc-8fd3-9178c2571a57/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:39:11,220 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b89800-b925-43dc-8fd3-9178c2571a57/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:39:11,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b89800-b925-43dc-8fd3-9178c2571a57/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-28 20:39:11,373 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-28 20:39:11,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:39:11,375 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-28 20:39:11,377 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:39:13,095 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:39:13,095 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:39:15,736 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:39:15,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989155365] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:39:15,737 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:39:15,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 31 [2023-11-28 20:39:15,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997111471] [2023-11-28 20:39:15,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:39:15,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-28 20:39:15,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:39:15,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-28 20:39:15,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=817, Unknown=0, NotChecked=0, Total=992 [2023-11-28 20:39:15,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 26 [2023-11-28 20:39:15,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 630 transitions, 9502 flow. Second operand has 32 states, 32 states have (on average 7.03125) internal successors, (225), 32 states have internal predecessors, (225), 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) [2023-11-28 20:39:15,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:39:15,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 26 [2023-11-28 20:39:15,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:40:13,328 INFO L124 PetriNetUnfolderBase]: 6501/11071 cut-off events. [2023-11-28 20:40:13,328 INFO L125 PetriNetUnfolderBase]: For 94823/94823 co-relation queries the response was YES. [2023-11-28 20:40:13,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66295 conditions, 11071 events. 6501/11071 cut-off events. For 94823/94823 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 76494 event pairs, 94 based on Foata normal form. 19/11089 useless extension candidates. Maximal degree in co-relation 66074. Up to 4434 conditions per place. [2023-11-28 20:40:13,476 INFO L140 encePairwiseOnDemand]: 13/26 looper letters, 655 selfloop transitions, 469 changer transitions 112/1239 dead transitions. [2023-11-28 20:40:13,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 1239 transitions, 18622 flow [2023-11-28 20:40:13,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2023-11-28 20:40:13,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2023-11-28 20:40:13,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 830 transitions. [2023-11-28 20:40:13,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4256410256410256 [2023-11-28 20:40:13,480 INFO L72 ComplementDD]: Start complementDD. Operand 75 states and 830 transitions. [2023-11-28 20:40:13,480 INFO L73 IsDeterministic]: Start isDeterministic. Operand 75 states and 830 transitions. [2023-11-28 20:40:13,481 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:40:13,481 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 75 states and 830 transitions. [2023-11-28 20:40:13,484 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 76 states, 75 states have (on average 11.066666666666666) internal successors, (830), 75 states have internal predecessors, (830), 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) [2023-11-28 20:40:13,488 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 76 states, 76 states have (on average 26.0) internal successors, (1976), 76 states have internal predecessors, (1976), 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) [2023-11-28 20:40:13,489 INFO L81 ComplementDD]: Finished complementDD. Result has 76 states, 76 states have (on average 26.0) internal successors, (1976), 76 states have internal predecessors, (1976), 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) [2023-11-28 20:40:13,489 INFO L175 Difference]: Start difference. First operand has 246 places, 630 transitions, 9502 flow. Second operand 75 states and 830 transitions. [2023-11-28 20:40:13,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 1239 transitions, 18622 flow [2023-11-28 20:40:14,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 1239 transitions, 17763 flow, removed 336 selfloop flow, removed 21 redundant places. [2023-11-28 20:40:14,414 INFO L231 Difference]: Finished difference. Result has 323 places, 864 transitions, 14283 flow [2023-11-28 20:40:14,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=8973, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=630, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=269, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=75, PETRI_FLOW=14283, PETRI_PLACES=323, PETRI_TRANSITIONS=864} [2023-11-28 20:40:14,415 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 295 predicate places. [2023-11-28 20:40:14,415 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 864 transitions, 14283 flow [2023-11-28 20:40:14,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 7.03125) internal successors, (225), 32 states have internal predecessors, (225), 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) [2023-11-28 20:40:14,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:40:14,416 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:40:14,420 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b89800-b925-43dc-8fd3-9178c2571a57/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-28 20:40:14,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b89800-b925-43dc-8fd3-9178c2571a57/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-28 20:40:14,617 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-28 20:40:14,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:40:14,617 INFO L85 PathProgramCache]: Analyzing trace with hash -1095707492, now seen corresponding path program 5 times [2023-11-28 20:40:14,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:40:14,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351714898] [2023-11-28 20:40:14,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:40:14,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:40:14,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:40:16,063 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:40:16,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:40:16,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351714898] [2023-11-28 20:40:16,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351714898] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:40:16,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835633354] [2023-11-28 20:40:16,064 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-28 20:40:16,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:40:16,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b89800-b925-43dc-8fd3-9178c2571a57/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:40:16,065 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b89800-b925-43dc-8fd3-9178c2571a57/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:40:16,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b89800-b925-43dc-8fd3-9178c2571a57/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-28 20:40:16,183 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-28 20:40:16,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:40:16,184 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-28 20:40:16,186 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:40:17,757 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:40:17,757 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:40:21,912 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:40:21,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835633354] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:40:21,913 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:40:21,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 10] total 25 [2023-11-28 20:40:21,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239995778] [2023-11-28 20:40:21,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:40:21,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-28 20:40:21,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:40:21,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-28 20:40:21,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=500, Unknown=0, NotChecked=0, Total=650 [2023-11-28 20:40:22,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 26 [2023-11-28 20:40:22,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 864 transitions, 14283 flow. Second operand has 26 states, 26 states have (on average 7.153846153846154) internal successors, (186), 26 states have internal predecessors, (186), 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) [2023-11-28 20:40:22,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:40:22,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 26 [2023-11-28 20:40:22,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:40:32,335 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-28 20:40:35,133 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-28 20:40:46,745 INFO L124 PetriNetUnfolderBase]: 7788/13166 cut-off events. [2023-11-28 20:40:46,745 INFO L125 PetriNetUnfolderBase]: For 156887/156887 co-relation queries the response was YES. [2023-11-28 20:40:46,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93812 conditions, 13166 events. 7788/13166 cut-off events. For 156887/156887 co-relation queries the response was YES. Maximal size of possible extension queue 623. Compared 92940 event pairs, 94 based on Foata normal form. 9/13174 useless extension candidates. Maximal degree in co-relation 93557. Up to 5214 conditions per place. [2023-11-28 20:40:46,892 INFO L140 encePairwiseOnDemand]: 14/26 looper letters, 667 selfloop transitions, 842 changer transitions 71/1583 dead transitions. [2023-11-28 20:40:46,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 1583 transitions, 28016 flow [2023-11-28 20:40:46,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-11-28 20:40:46,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2023-11-28 20:40:46,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 538 transitions. [2023-11-28 20:40:46,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4310897435897436 [2023-11-28 20:40:46,894 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 538 transitions. [2023-11-28 20:40:46,894 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 538 transitions. [2023-11-28 20:40:46,895 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:40:46,895 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 538 transitions. [2023-11-28 20:40:46,897 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 11.208333333333334) internal successors, (538), 48 states have internal predecessors, (538), 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) [2023-11-28 20:40:46,899 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 26.0) internal successors, (1274), 49 states have internal predecessors, (1274), 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) [2023-11-28 20:40:46,899 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 26.0) internal successors, (1274), 49 states have internal predecessors, (1274), 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) [2023-11-28 20:40:46,899 INFO L175 Difference]: Start difference. First operand has 323 places, 864 transitions, 14283 flow. Second operand 48 states and 538 transitions. [2023-11-28 20:40:46,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 1583 transitions, 28016 flow [2023-11-28 20:40:49,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 1583 transitions, 27102 flow, removed 430 selfloop flow, removed 19 redundant places. [2023-11-28 20:40:49,155 INFO L231 Difference]: Finished difference. Result has 363 places, 1284 transitions, 24066 flow [2023-11-28 20:40:49,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=13695, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=864, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=448, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=24066, PETRI_PLACES=363, PETRI_TRANSITIONS=1284} [2023-11-28 20:40:49,157 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 335 predicate places. [2023-11-28 20:40:49,157 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 1284 transitions, 24066 flow [2023-11-28 20:40:49,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 7.153846153846154) internal successors, (186), 26 states have internal predecessors, (186), 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) [2023-11-28 20:40:49,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:40:49,157 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] [2023-11-28 20:40:49,162 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b89800-b925-43dc-8fd3-9178c2571a57/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-28 20:40:49,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b89800-b925-43dc-8fd3-9178c2571a57/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-28 20:40:49,358 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-28 20:40:49,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:40:49,359 INFO L85 PathProgramCache]: Analyzing trace with hash 619237696, now seen corresponding path program 6 times [2023-11-28 20:40:49,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:40:49,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103631714] [2023-11-28 20:40:49,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:40:49,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:40:49,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:40:50,714 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:40:50,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:40:50,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103631714] [2023-11-28 20:40:50,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103631714] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:40:50,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877929540] [2023-11-28 20:40:50,715 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-28 20:40:50,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:40:50,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b89800-b925-43dc-8fd3-9178c2571a57/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:40:50,716 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b89800-b925-43dc-8fd3-9178c2571a57/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:40:50,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b89800-b925-43dc-8fd3-9178c2571a57/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-28 20:40:50,894 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-28 20:40:50,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:40:50,896 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-28 20:40:50,897 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:40:51,866 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:40:51,866 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:40:54,125 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:40:54,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877929540] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:40:54,125 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:40:54,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2023-11-28 20:40:54,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954464492] [2023-11-28 20:40:54,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:40:54,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-28 20:40:54,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:40:54,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-28 20:40:54,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2023-11-28 20:40:54,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 26 [2023-11-28 20:40:54,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 1284 transitions, 24066 flow. Second operand has 27 states, 27 states have (on average 7.222222222222222) internal successors, (195), 27 states have internal predecessors, (195), 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) [2023-11-28 20:40:54,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:40:54,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 26 [2023-11-28 20:40:54,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:41:34,425 INFO L124 PetriNetUnfolderBase]: 11316/19179 cut-off events. [2023-11-28 20:41:34,425 INFO L125 PetriNetUnfolderBase]: For 329779/329779 co-relation queries the response was YES. [2023-11-28 20:41:34,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157926 conditions, 19179 events. 11316/19179 cut-off events. For 329779/329779 co-relation queries the response was YES. Maximal size of possible extension queue 828. Compared 141795 event pairs, 188 based on Foata normal form. 19/19197 useless extension candidates. Maximal degree in co-relation 157658. Up to 6063 conditions per place. [2023-11-28 20:41:34,755 INFO L140 encePairwiseOnDemand]: 14/26 looper letters, 1062 selfloop transitions, 1145 changer transitions 167/2377 dead transitions. [2023-11-28 20:41:34,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 2377 transitions, 46296 flow [2023-11-28 20:41:34,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2023-11-28 20:41:34,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2023-11-28 20:41:34,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 960 transitions. [2023-11-28 20:41:34,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4448563484708063 [2023-11-28 20:41:34,759 INFO L72 ComplementDD]: Start complementDD. Operand 83 states and 960 transitions. [2023-11-28 20:41:34,759 INFO L73 IsDeterministic]: Start isDeterministic. Operand 83 states and 960 transitions. [2023-11-28 20:41:34,760 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:41:34,760 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 83 states and 960 transitions. [2023-11-28 20:41:34,763 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 84 states, 83 states have (on average 11.566265060240964) internal successors, (960), 83 states have internal predecessors, (960), 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) [2023-11-28 20:41:34,768 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 84 states, 84 states have (on average 26.0) internal successors, (2184), 84 states have internal predecessors, (2184), 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) [2023-11-28 20:41:34,768 INFO L81 ComplementDD]: Finished complementDD. Result has 84 states, 84 states have (on average 26.0) internal successors, (2184), 84 states have internal predecessors, (2184), 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) [2023-11-28 20:41:34,769 INFO L175 Difference]: Start difference. First operand has 363 places, 1284 transitions, 24066 flow. Second operand 83 states and 960 transitions. [2023-11-28 20:41:34,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 2377 transitions, 46296 flow [2023-11-28 20:41:40,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 2377 transitions, 45582 flow, removed 342 selfloop flow, removed 13 redundant places. [2023-11-28 20:41:40,363 INFO L231 Difference]: Finished difference. Result has 459 places, 1807 transitions, 38417 flow [2023-11-28 20:41:40,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=23722, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=699, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=461, PETRI_DIFFERENCE_SUBTRAHEND_STATES=83, PETRI_FLOW=38417, PETRI_PLACES=459, PETRI_TRANSITIONS=1807} [2023-11-28 20:41:40,365 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 431 predicate places. [2023-11-28 20:41:40,365 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 1807 transitions, 38417 flow [2023-11-28 20:41:40,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 7.222222222222222) internal successors, (195), 27 states have internal predecessors, (195), 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) [2023-11-28 20:41:40,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:41:40,365 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:41:40,369 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b89800-b925-43dc-8fd3-9178c2571a57/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-28 20:41:40,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b89800-b925-43dc-8fd3-9178c2571a57/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:41:40,566 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-28 20:41:40,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:41:40,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1318331875, now seen corresponding path program 7 times [2023-11-28 20:41:40,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:41:40,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920358160] [2023-11-28 20:41:40,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:41:40,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:41:40,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:41:42,202 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:41:42,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:41:42,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920358160] [2023-11-28 20:41:42,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920358160] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:41:42,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513073033] [2023-11-28 20:41:42,202 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-28 20:41:42,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:41:42,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b89800-b925-43dc-8fd3-9178c2571a57/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:41:42,203 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b89800-b925-43dc-8fd3-9178c2571a57/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:41:42,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b89800-b925-43dc-8fd3-9178c2571a57/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-28 20:41:42,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:41:42,324 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-28 20:41:42,326 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:41:43,472 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:41:43,472 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:41:45,687 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:41:45,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513073033] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:41:45,687 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:41:45,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 31 [2023-11-28 20:41:45,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001626153] [2023-11-28 20:41:45,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:41:45,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-28 20:41:45,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:41:45,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-28 20:41:45,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=831, Unknown=0, NotChecked=0, Total=992 [2023-11-28 20:41:46,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 26 [2023-11-28 20:41:46,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 1807 transitions, 38417 flow. Second operand has 32 states, 32 states have (on average 7.3125) internal successors, (234), 32 states have internal predecessors, (234), 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) [2023-11-28 20:41:46,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:41:46,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 26 [2023-11-28 20:41:46,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:41:52,799 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-28 20:42:38,761 INFO L124 PetriNetUnfolderBase]: 13697/23168 cut-off events. [2023-11-28 20:42:38,761 INFO L125 PetriNetUnfolderBase]: For 506244/506244 co-relation queries the response was YES. [2023-11-28 20:42:39,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 212539 conditions, 23168 events. 13697/23168 cut-off events. For 506244/506244 co-relation queries the response was YES. Maximal size of possible extension queue 943. Compared 175848 event pairs, 158 based on Foata normal form. 17/23184 useless extension candidates. Maximal degree in co-relation 212081. Up to 8646 conditions per place. [2023-11-28 20:42:39,242 INFO L140 encePairwiseOnDemand]: 14/26 looper letters, 1222 selfloop transitions, 1402 changer transitions 169/2796 dead transitions. [2023-11-28 20:42:39,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 526 places, 2796 transitions, 61301 flow [2023-11-28 20:42:39,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2023-11-28 20:42:39,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2023-11-28 20:42:39,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 978 transitions. [2023-11-28 20:42:39,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4323607427055703 [2023-11-28 20:42:39,245 INFO L72 ComplementDD]: Start complementDD. Operand 87 states and 978 transitions. [2023-11-28 20:42:39,245 INFO L73 IsDeterministic]: Start isDeterministic. Operand 87 states and 978 transitions. [2023-11-28 20:42:39,246 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:42:39,246 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 87 states and 978 transitions. [2023-11-28 20:42:39,249 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 88 states, 87 states have (on average 11.241379310344827) internal successors, (978), 87 states have internal predecessors, (978), 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) [2023-11-28 20:42:39,254 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 88 states, 88 states have (on average 26.0) internal successors, (2288), 88 states have internal predecessors, (2288), 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) [2023-11-28 20:42:39,255 INFO L81 ComplementDD]: Finished complementDD. Result has 88 states, 88 states have (on average 26.0) internal successors, (2288), 88 states have internal predecessors, (2288), 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) [2023-11-28 20:42:39,255 INFO L175 Difference]: Start difference. First operand has 459 places, 1807 transitions, 38417 flow. Second operand 87 states and 978 transitions. [2023-11-28 20:42:39,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 526 places, 2796 transitions, 61301 flow [2023-11-28 20:42:49,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 507 places, 2796 transitions, 59611 flow, removed 818 selfloop flow, removed 19 redundant places. [2023-11-28 20:42:50,053 INFO L231 Difference]: Finished difference. Result has 545 places, 2230 transitions, 51710 flow [2023-11-28 20:42:50,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=37220, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1807, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1025, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=670, PETRI_DIFFERENCE_SUBTRAHEND_STATES=87, PETRI_FLOW=51710, PETRI_PLACES=545, PETRI_TRANSITIONS=2230} [2023-11-28 20:42:50,055 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 517 predicate places. [2023-11-28 20:42:50,055 INFO L495 AbstractCegarLoop]: Abstraction has has 545 places, 2230 transitions, 51710 flow [2023-11-28 20:42:50,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 7.3125) internal successors, (234), 32 states have internal predecessors, (234), 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) [2023-11-28 20:42:50,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:42:50,056 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:42:50,060 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b89800-b925-43dc-8fd3-9178c2571a57/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-28 20:42:50,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b89800-b925-43dc-8fd3-9178c2571a57/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:42:50,256 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-28 20:42:50,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:42:50,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1219149247, now seen corresponding path program 8 times [2023-11-28 20:42:50,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:42:50,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794366035] [2023-11-28 20:42:50,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:42:50,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:42:50,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:42:52,172 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:42:52,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:42:52,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794366035] [2023-11-28 20:42:52,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794366035] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:42:52,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357996345] [2023-11-28 20:42:52,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-28 20:42:52,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:42:52,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b89800-b925-43dc-8fd3-9178c2571a57/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:42:52,174 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b89800-b925-43dc-8fd3-9178c2571a57/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:42:52,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b89800-b925-43dc-8fd3-9178c2571a57/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-28 20:42:52,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-28 20:42:52,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:42:52,305 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-28 20:42:52,307 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:42:53,442 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:42:53,443 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:42:55,605 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:42:55,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357996345] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:42:55,606 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:42:55,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 35 [2023-11-28 20:42:55,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415791803] [2023-11-28 20:42:55,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:42:55,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-11-28 20:42:55,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:42:55,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-11-28 20:42:55,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1069, Unknown=0, NotChecked=0, Total=1260 [2023-11-28 20:42:56,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 26 [2023-11-28 20:42:56,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 545 places, 2230 transitions, 51710 flow. Second operand has 36 states, 36 states have (on average 7.083333333333333) internal successors, (255), 36 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:42:56,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:42:56,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 26 [2023-11-28 20:42:56,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:44:55,639 INFO L124 PetriNetUnfolderBase]: 18286/30837 cut-off events. [2023-11-28 20:44:55,639 INFO L125 PetriNetUnfolderBase]: For 783429/783429 co-relation queries the response was YES. [2023-11-28 20:44:56,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 301642 conditions, 30837 events. 18286/30837 cut-off events. For 783429/783429 co-relation queries the response was YES. Maximal size of possible extension queue 1192. Compared 242079 event pairs, 302 based on Foata normal form. 18/30854 useless extension candidates. Maximal degree in co-relation 301214. Up to 7145 conditions per place. [2023-11-28 20:44:56,327 INFO L140 encePairwiseOnDemand]: 14/26 looper letters, 1173 selfloop transitions, 2490 changer transitions 140/3806 dead transitions. [2023-11-28 20:44:56,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 640 places, 3806 transitions, 91472 flow [2023-11-28 20:44:56,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2023-11-28 20:44:56,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2023-11-28 20:44:56,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 1284 transitions. [2023-11-28 20:44:56,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42572944297082227 [2023-11-28 20:44:56,330 INFO L72 ComplementDD]: Start complementDD. Operand 116 states and 1284 transitions. [2023-11-28 20:44:56,330 INFO L73 IsDeterministic]: Start isDeterministic. Operand 116 states and 1284 transitions. [2023-11-28 20:44:56,331 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:44:56,331 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 116 states and 1284 transitions. [2023-11-28 20:44:56,334 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 117 states, 116 states have (on average 11.068965517241379) internal successors, (1284), 116 states have internal predecessors, (1284), 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) [2023-11-28 20:44:56,340 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 117 states, 117 states have (on average 26.0) internal successors, (3042), 117 states have internal predecessors, (3042), 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) [2023-11-28 20:44:56,341 INFO L81 ComplementDD]: Finished complementDD. Result has 117 states, 117 states have (on average 26.0) internal successors, (3042), 117 states have internal predecessors, (3042), 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) [2023-11-28 20:44:56,342 INFO L175 Difference]: Start difference. First operand has 545 places, 2230 transitions, 51710 flow. Second operand 116 states and 1284 transitions. [2023-11-28 20:44:56,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 640 places, 3806 transitions, 91472 flow [2023-11-28 20:45:15,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 604 places, 3806 transitions, 89971 flow, removed 649 selfloop flow, removed 36 redundant places. [2023-11-28 20:45:15,514 INFO L231 Difference]: Finished difference. Result has 655 places, 3061 transitions, 79779 flow [2023-11-28 20:45:15,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=50640, PETRI_DIFFERENCE_MINUEND_PLACES=489, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1739, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=116, PETRI_FLOW=79779, PETRI_PLACES=655, PETRI_TRANSITIONS=3061} [2023-11-28 20:45:15,516 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 627 predicate places. [2023-11-28 20:45:15,517 INFO L495 AbstractCegarLoop]: Abstraction has has 655 places, 3061 transitions, 79779 flow [2023-11-28 20:45:15,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 7.083333333333333) internal successors, (255), 36 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:45:15,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:45:15,517 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:45:15,521 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b89800-b925-43dc-8fd3-9178c2571a57/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-28 20:45:15,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b89800-b925-43dc-8fd3-9178c2571a57/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-28 20:45:15,718 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-28 20:45:15,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:45:15,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1681431609, now seen corresponding path program 9 times [2023-11-28 20:45:15,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:45:15,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902669501] [2023-11-28 20:45:15,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:45:15,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:45:15,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:45:18,260 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:45:18,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:45:18,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902669501] [2023-11-28 20:45:18,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902669501] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:45:18,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908929706] [2023-11-28 20:45:18,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-28 20:45:18,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:45:18,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b89800-b925-43dc-8fd3-9178c2571a57/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:45:18,262 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b89800-b925-43dc-8fd3-9178c2571a57/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:45:18,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b89800-b925-43dc-8fd3-9178c2571a57/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-28 20:45:18,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-11-28 20:45:18,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:45:18,483 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-28 20:45:18,484 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:45:20,493 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:45:20,493 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:45:28,301 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:45:28,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908929706] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:45:28,301 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:45:28,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 13] total 39 [2023-11-28 20:45:28,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979022098] [2023-11-28 20:45:28,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:45:28,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-11-28 20:45:28,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:45:28,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-11-28 20:45:28,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1330, Unknown=0, NotChecked=0, Total=1560 [2023-11-28 20:45:28,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 26 [2023-11-28 20:45:28,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 655 places, 3061 transitions, 79779 flow. Second operand has 40 states, 40 states have (on average 6.8) internal successors, (272), 40 states have internal predecessors, (272), 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) [2023-11-28 20:45:28,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:45:28,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 26 [2023-11-28 20:45:28,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:45:45,695 WARN L293 SmtUtils]: Spent 7.21s on a formula simplification. DAG size of input: 146 DAG size of output: 86 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-28 20:46:03,745 WARN L293 SmtUtils]: Spent 7.40s on a formula simplification. DAG size of input: 152 DAG size of output: 93 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-28 20:46:40,251 WARN L293 SmtUtils]: Spent 6.36s on a formula simplification. DAG size of input: 129 DAG size of output: 107 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-28 20:46:57,820 WARN L293 SmtUtils]: Spent 8.12s on a formula simplification. DAG size of input: 150 DAG size of output: 71 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-28 20:47:45,681 WARN L293 SmtUtils]: Spent 6.12s on a formula simplification. DAG size of input: 156 DAG size of output: 79 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-28 20:48:23,463 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.52s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-28 20:48:47,359 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-28 20:48:48,618 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-28 20:49:42,188 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.08s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-28 20:50:59,711 WARN L293 SmtUtils]: Spent 18.84s on a formula simplification. DAG size of input: 170 DAG size of output: 79 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)