./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-multiply-verify.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_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/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_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-multiply-verify.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/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_055909f6-a70f-4d37-a08f-3e86b2c30d37/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 d79cb5dae664e13779624ff0ffbc531b419f89e2c7510a92e890992a52ee7c98 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 05:24:39,183 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 05:24:39,253 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 05:24:39,258 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 05:24:39,258 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 05:24:39,287 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 05:24:39,287 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 05:24:39,288 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 05:24:39,289 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 05:24:39,289 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 05:24:39,290 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 05:24:39,291 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 05:24:39,292 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 05:24:39,292 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 05:24:39,293 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 05:24:39,294 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 05:24:39,294 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 05:24:39,295 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 05:24:39,295 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 05:24:39,296 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 05:24:39,297 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 05:24:39,298 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 05:24:39,298 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 05:24:39,299 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 05:24:39,299 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 05:24:39,300 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 05:24:39,301 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 05:24:39,301 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 05:24:39,302 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 05:24:39,303 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 05:24:39,303 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 05:24:39,304 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 05:24:39,304 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 05:24:39,305 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 05:24:39,305 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 05:24:39,305 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 05:24:39,305 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 05:24:39,306 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 05:24:39,306 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 05:24:39,306 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 05:24:39,306 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 05:24:39,307 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 05:24:39,307 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_055909f6-a70f-4d37-a08f-3e86b2c30d37/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d79cb5dae664e13779624ff0ffbc531b419f89e2c7510a92e890992a52ee7c98 [2023-11-29 05:24:39,554 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 05:24:39,579 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 05:24:39,582 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 05:24:39,583 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 05:24:39,584 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 05:24:39,585 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/popl20-more-multiply-verify.wvr.c [2023-11-29 05:24:43,034 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 05:24:43,234 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 05:24:43,235 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/sv-benchmarks/c/weaver/popl20-more-multiply-verify.wvr.c [2023-11-29 05:24:43,245 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/data/4835338fb/a2a352e06e774371b25cf7c849dbce9a/FLAGddf6df2e6 [2023-11-29 05:24:43,263 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/data/4835338fb/a2a352e06e774371b25cf7c849dbce9a [2023-11-29 05:24:43,266 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 05:24:43,268 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 05:24:43,269 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 05:24:43,270 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 05:24:43,277 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 05:24:43,278 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 05:24:43" (1/1) ... [2023-11-29 05:24:43,279 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ae2b3f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:24:43, skipping insertion in model container [2023-11-29 05:24:43,279 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 05:24:43" (1/1) ... [2023-11-29 05:24:43,307 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 05:24:43,495 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_055909f6-a70f-4d37-a08f-3e86b2c30d37/sv-benchmarks/c/weaver/popl20-more-multiply-verify.wvr.c[3081,3094] [2023-11-29 05:24:43,506 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 05:24:43,519 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 05:24:43,548 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_055909f6-a70f-4d37-a08f-3e86b2c30d37/sv-benchmarks/c/weaver/popl20-more-multiply-verify.wvr.c[3081,3094] [2023-11-29 05:24:43,554 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 05:24:43,565 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 05:24:43,566 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 05:24:43,573 INFO L206 MainTranslator]: Completed translation [2023-11-29 05:24:43,573 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:24:43 WrapperNode [2023-11-29 05:24:43,574 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 05:24:43,575 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 05:24:43,575 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 05:24:43,576 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 05:24:43,584 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:24:43" (1/1) ... [2023-11-29 05:24:43,595 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:24:43" (1/1) ... [2023-11-29 05:24:43,630 INFO L138 Inliner]: procedures = 26, calls = 50, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 189 [2023-11-29 05:24:43,630 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 05:24:43,631 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 05:24:43,632 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 05:24:43,632 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 05:24:43,646 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:24:43" (1/1) ... [2023-11-29 05:24:43,647 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:24:43" (1/1) ... [2023-11-29 05:24:43,652 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:24:43" (1/1) ... [2023-11-29 05:24:43,673 INFO L175 MemorySlicer]: Split 13 memory accesses to 5 slices as follows [2, 2, 5, 2, 2]. 38 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 4 writes are split as follows [0, 1, 1, 1, 1]. [2023-11-29 05:24:43,674 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:24:43" (1/1) ... [2023-11-29 05:24:43,674 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:24:43" (1/1) ... [2023-11-29 05:24:43,686 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:24:43" (1/1) ... [2023-11-29 05:24:43,691 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:24:43" (1/1) ... [2023-11-29 05:24:43,694 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:24:43" (1/1) ... [2023-11-29 05:24:43,696 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:24:43" (1/1) ... [2023-11-29 05:24:43,701 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 05:24:43,703 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 05:24:43,703 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 05:24:43,703 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 05:24:43,704 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:24:43" (1/1) ... [2023-11-29 05:24:43,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 05:24:43,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:24:43,737 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 05:24:43,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 05:24:43,784 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 05:24:43,784 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 05:24:43,784 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 05:24:43,785 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 05:24:43,785 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 05:24:43,785 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-29 05:24:43,785 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-29 05:24:43,785 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 05:24:43,785 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 05:24:43,786 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 05:24:43,786 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-29 05:24:43,786 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-29 05:24:43,786 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-29 05:24:43,786 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-29 05:24:43,787 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-29 05:24:43,787 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-29 05:24:43,787 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-29 05:24:43,787 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-29 05:24:43,787 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 05:24:43,788 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 05:24:43,788 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 05:24:43,788 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-29 05:24:43,788 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-29 05:24:43,788 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-29 05:24:43,788 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-29 05:24:43,789 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-29 05:24:43,789 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 05:24:43,789 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 05:24:43,789 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 05:24:43,791 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-29 05:24:43,933 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 05:24:43,935 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 05:24:44,270 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 05:24:44,525 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 05:24:44,525 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-29 05:24:44,526 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 05:24:44 BoogieIcfgContainer [2023-11-29 05:24:44,526 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 05:24:44,528 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 05:24:44,528 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 05:24:44,531 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 05:24:44,531 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 05:24:43" (1/3) ... [2023-11-29 05:24:44,532 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7336fa29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 05:24:44, skipping insertion in model container [2023-11-29 05:24:44,532 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:24:43" (2/3) ... [2023-11-29 05:24:44,533 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7336fa29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 05:24:44, skipping insertion in model container [2023-11-29 05:24:44,533 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 05:24:44" (3/3) ... [2023-11-29 05:24:44,534 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-multiply-verify.wvr.c [2023-11-29 05:24:44,542 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-29 05:24:44,552 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 05:24:44,552 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 05:24:44,552 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 05:24:44,603 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-29 05:24:44,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 44 places, 37 transitions, 95 flow [2023-11-29 05:24:44,674 INFO L124 PetriNetUnfolderBase]: 3/34 cut-off events. [2023-11-29 05:24:44,675 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-29 05:24:44,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 34 events. 3/34 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 54 event pairs, 0 based on Foata normal form. 0/30 useless extension candidates. Maximal degree in co-relation 26. Up to 2 conditions per place. [2023-11-29 05:24:44,679 INFO L82 GeneralOperation]: Start removeDead. Operand has 44 places, 37 transitions, 95 flow [2023-11-29 05:24:44,683 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 40 places, 33 transitions, 84 flow [2023-11-29 05:24:44,696 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 05:24:44,703 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;@29aec752, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 05:24:44,704 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-29 05:24:44,722 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 05:24:44,722 INFO L124 PetriNetUnfolderBase]: 3/32 cut-off events. [2023-11-29 05:24:44,722 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-29 05:24:44,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:24:44,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:24:44,724 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:24:44,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:24:44,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1429538076, now seen corresponding path program 1 times [2023-11-29 05:24:44,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:24:44,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760735654] [2023-11-29 05:24:44,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:24:44,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:24:44,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:24:45,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:24:45,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:24:45,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760735654] [2023-11-29 05:24:45,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760735654] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:24:45,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:24:45,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 05:24:45,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51506715] [2023-11-29 05:24:45,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:24:45,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:24:45,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:24:45,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:24:45,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:24:45,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 37 [2023-11-29 05:24:45,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 33 transitions, 84 flow. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:24:45,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:24:45,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 37 [2023-11-29 05:24:45,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:24:45,506 INFO L124 PetriNetUnfolderBase]: 377/611 cut-off events. [2023-11-29 05:24:45,506 INFO L125 PetriNetUnfolderBase]: For 66/66 co-relation queries the response was YES. [2023-11-29 05:24:45,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1288 conditions, 611 events. 377/611 cut-off events. For 66/66 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2151 event pairs, 136 based on Foata normal form. 9/607 useless extension candidates. Maximal degree in co-relation 1069. Up to 477 conditions per place. [2023-11-29 05:24:45,518 INFO L140 encePairwiseOnDemand]: 33/37 looper letters, 37 selfloop transitions, 3 changer transitions 0/46 dead transitions. [2023-11-29 05:24:45,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 46 transitions, 196 flow [2023-11-29 05:24:45,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:24:45,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 05:24:45,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 68 transitions. [2023-11-29 05:24:45,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6126126126126126 [2023-11-29 05:24:45,534 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 68 transitions. [2023-11-29 05:24:45,535 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 68 transitions. [2023-11-29 05:24:45,536 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:24:45,539 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 68 transitions. [2023-11-29 05:24:45,542 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:24:45,546 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:24:45,547 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:24:45,549 INFO L175 Difference]: Start difference. First operand has 40 places, 33 transitions, 84 flow. Second operand 3 states and 68 transitions. [2023-11-29 05:24:45,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 46 transitions, 196 flow [2023-11-29 05:24:45,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 46 transitions, 180 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-29 05:24:45,558 INFO L231 Difference]: Finished difference. Result has 37 places, 35 transitions, 91 flow [2023-11-29 05:24:45,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=91, PETRI_PLACES=37, PETRI_TRANSITIONS=35} [2023-11-29 05:24:45,565 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, -3 predicate places. [2023-11-29 05:24:45,565 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 35 transitions, 91 flow [2023-11-29 05:24:45,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:24:45,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:24:45,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:24:45,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 05:24:45,567 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:24:45,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:24:45,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1439560030, now seen corresponding path program 2 times [2023-11-29 05:24:45,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:24:45,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040948825] [2023-11-29 05:24:45,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:24:45,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:24:45,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:24:45,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:24:45,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:24:45,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040948825] [2023-11-29 05:24:45,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040948825] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:24:45,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:24:45,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 05:24:45,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919842461] [2023-11-29 05:24:45,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:24:45,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 05:24:45,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:24:45,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 05:24:45,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 05:24:45,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 37 [2023-11-29 05:24:45,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 35 transitions, 91 flow. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:24:45,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:24:45,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 37 [2023-11-29 05:24:45,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:24:46,224 INFO L124 PetriNetUnfolderBase]: 447/747 cut-off events. [2023-11-29 05:24:46,225 INFO L125 PetriNetUnfolderBase]: For 108/108 co-relation queries the response was YES. [2023-11-29 05:24:46,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1635 conditions, 747 events. 447/747 cut-off events. For 108/108 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2813 event pairs, 340 based on Foata normal form. 26/749 useless extension candidates. Maximal degree in co-relation 520. Up to 592 conditions per place. [2023-11-29 05:24:46,234 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 28 selfloop transitions, 2 changer transitions 13/49 dead transitions. [2023-11-29 05:24:46,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 49 transitions, 208 flow [2023-11-29 05:24:46,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 05:24:46,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 05:24:46,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 79 transitions. [2023-11-29 05:24:46,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5337837837837838 [2023-11-29 05:24:46,237 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 79 transitions. [2023-11-29 05:24:46,237 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 79 transitions. [2023-11-29 05:24:46,237 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:24:46,237 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 79 transitions. [2023-11-29 05:24:46,238 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:24:46,239 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 37.0) internal successors, (185), 5 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:24:46,240 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 37.0) internal successors, (185), 5 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:24:46,240 INFO L175 Difference]: Start difference. First operand has 37 places, 35 transitions, 91 flow. Second operand 4 states and 79 transitions. [2023-11-29 05:24:46,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 49 transitions, 208 flow [2023-11-29 05:24:46,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 49 transitions, 205 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 05:24:46,243 INFO L231 Difference]: Finished difference. Result has 41 places, 36 transitions, 104 flow [2023-11-29 05:24:46,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=104, PETRI_PLACES=41, PETRI_TRANSITIONS=36} [2023-11-29 05:24:46,244 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 1 predicate places. [2023-11-29 05:24:46,245 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 36 transitions, 104 flow [2023-11-29 05:24:46,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:24:46,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:24:46,245 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:24:46,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 05:24:46,246 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:24:46,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:24:46,247 INFO L85 PathProgramCache]: Analyzing trace with hash 475046753, now seen corresponding path program 1 times [2023-11-29 05:24:46,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:24:46,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148851637] [2023-11-29 05:24:46,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:24:46,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:24:46,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:24:46,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:24:46,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:24:46,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148851637] [2023-11-29 05:24:46,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148851637] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:24:46,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:24:46,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 05:24:46,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115948253] [2023-11-29 05:24:46,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:24:46,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 05:24:46,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:24:46,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 05:24:46,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:24:46,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 37 [2023-11-29 05:24:46,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 36 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:24:46,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:24:46,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 37 [2023-11-29 05:24:46,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:24:46,562 INFO L124 PetriNetUnfolderBase]: 237/412 cut-off events. [2023-11-29 05:24:46,563 INFO L125 PetriNetUnfolderBase]: For 110/124 co-relation queries the response was YES. [2023-11-29 05:24:46,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 931 conditions, 412 events. 237/412 cut-off events. For 110/124 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1364 event pairs, 60 based on Foata normal form. 34/434 useless extension candidates. Maximal degree in co-relation 917. Up to 152 conditions per place. [2023-11-29 05:24:46,568 INFO L140 encePairwiseOnDemand]: 33/37 looper letters, 43 selfloop transitions, 5 changer transitions 0/54 dead transitions. [2023-11-29 05:24:46,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 54 transitions, 240 flow [2023-11-29 05:24:46,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 05:24:46,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 05:24:46,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 84 transitions. [2023-11-29 05:24:46,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5675675675675675 [2023-11-29 05:24:46,571 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 84 transitions. [2023-11-29 05:24:46,571 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 84 transitions. [2023-11-29 05:24:46,572 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:24:46,572 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 84 transitions. [2023-11-29 05:24:46,573 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:24:46,574 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 37.0) internal successors, (185), 5 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:24:46,575 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 37.0) internal successors, (185), 5 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:24:46,575 INFO L175 Difference]: Start difference. First operand has 41 places, 36 transitions, 104 flow. Second operand 4 states and 84 transitions. [2023-11-29 05:24:46,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 54 transitions, 240 flow [2023-11-29 05:24:46,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 54 transitions, 232 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-11-29 05:24:46,579 INFO L231 Difference]: Finished difference. Result has 42 places, 36 transitions, 112 flow [2023-11-29 05:24:46,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=112, PETRI_PLACES=42, PETRI_TRANSITIONS=36} [2023-11-29 05:24:46,580 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 2 predicate places. [2023-11-29 05:24:46,581 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 36 transitions, 112 flow [2023-11-29 05:24:46,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:24:46,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:24:46,581 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:24:46,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 05:24:46,582 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:24:46,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:24:46,582 INFO L85 PathProgramCache]: Analyzing trace with hash -911811271, now seen corresponding path program 2 times [2023-11-29 05:24:46,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:24:46,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029474302] [2023-11-29 05:24:46,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:24:46,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:24:46,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:24:46,853 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:24:46,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:24:46,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029474302] [2023-11-29 05:24:46,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029474302] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:24:46,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414614840] [2023-11-29 05:24:46,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:24:46,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:24:46,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:24:46,856 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:24:46,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 05:24:47,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 05:24:47,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:24:47,085 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-29 05:24:47,092 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:24:47,418 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:24:47,419 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:24:47,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414614840] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:24:47,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 05:24:47,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 11 [2023-11-29 05:24:47,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164529550] [2023-11-29 05:24:47,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:24:47,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 05:24:47,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:24:47,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 05:24:47,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-11-29 05:24:47,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2023-11-29 05:24:47,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 36 transitions, 112 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:24:47,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:24:47,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2023-11-29 05:24:47,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:24:47,899 INFO L124 PetriNetUnfolderBase]: 574/975 cut-off events. [2023-11-29 05:24:47,900 INFO L125 PetriNetUnfolderBase]: For 443/451 co-relation queries the response was YES. [2023-11-29 05:24:47,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2297 conditions, 975 events. 574/975 cut-off events. For 443/451 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 4466 event pairs, 143 based on Foata normal form. 6/978 useless extension candidates. Maximal degree in co-relation 2278. Up to 369 conditions per place. [2023-11-29 05:24:47,908 INFO L140 encePairwiseOnDemand]: 28/37 looper letters, 65 selfloop transitions, 14 changer transitions 21/104 dead transitions. [2023-11-29 05:24:47,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 104 transitions, 495 flow [2023-11-29 05:24:47,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 05:24:47,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-29 05:24:47,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2023-11-29 05:24:47,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.527027027027027 [2023-11-29 05:24:47,910 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 156 transitions. [2023-11-29 05:24:47,911 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 156 transitions. [2023-11-29 05:24:47,911 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:24:47,911 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 156 transitions. [2023-11-29 05:24:47,912 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 19.5) internal successors, (156), 8 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) [2023-11-29 05:24:47,913 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 37.0) internal successors, (333), 9 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:24:47,914 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 37.0) internal successors, (333), 9 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:24:47,914 INFO L175 Difference]: Start difference. First operand has 42 places, 36 transitions, 112 flow. Second operand 8 states and 156 transitions. [2023-11-29 05:24:47,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 104 transitions, 495 flow [2023-11-29 05:24:47,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 104 transitions, 475 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-11-29 05:24:47,919 INFO L231 Difference]: Finished difference. Result has 53 places, 47 transitions, 211 flow [2023-11-29 05:24:47,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=211, PETRI_PLACES=53, PETRI_TRANSITIONS=47} [2023-11-29 05:24:47,920 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 13 predicate places. [2023-11-29 05:24:47,920 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 47 transitions, 211 flow [2023-11-29 05:24:47,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:24:47,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:24:47,920 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:24:47,934 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 05:24:48,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:24:48,125 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:24:48,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:24:48,125 INFO L85 PathProgramCache]: Analyzing trace with hash 420361689, now seen corresponding path program 3 times [2023-11-29 05:24:48,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:24:48,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591128023] [2023-11-29 05:24:48,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:24:48,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:24:48,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:24:48,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:24:48,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:24:48,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591128023] [2023-11-29 05:24:48,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591128023] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:24:48,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164962441] [2023-11-29 05:24:48,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:24:48,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:24:48,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:24:48,346 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:24:48,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 05:24:48,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-29 05:24:48,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:24:48,508 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-29 05:24:48,512 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:24:48,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:24:48,769 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:24:48,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164962441] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:24:48,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 05:24:48,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 11 [2023-11-29 05:24:48,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36605250] [2023-11-29 05:24:48,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:24:48,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 05:24:48,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:24:48,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 05:24:48,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-11-29 05:24:48,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2023-11-29 05:24:48,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 47 transitions, 211 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:24:48,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:24:48,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2023-11-29 05:24:48,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:24:49,448 INFO L124 PetriNetUnfolderBase]: 770/1305 cut-off events. [2023-11-29 05:24:49,448 INFO L125 PetriNetUnfolderBase]: For 1259/1266 co-relation queries the response was YES. [2023-11-29 05:24:49,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3732 conditions, 1305 events. 770/1305 cut-off events. For 1259/1266 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 6380 event pairs, 199 based on Foata normal form. 6/1309 useless extension candidates. Maximal degree in co-relation 3716. Up to 437 conditions per place. [2023-11-29 05:24:49,465 INFO L140 encePairwiseOnDemand]: 28/37 looper letters, 67 selfloop transitions, 21 changer transitions 21/113 dead transitions. [2023-11-29 05:24:49,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 113 transitions, 655 flow [2023-11-29 05:24:49,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 05:24:49,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-29 05:24:49,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2023-11-29 05:24:49,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5236486486486487 [2023-11-29 05:24:49,468 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 155 transitions. [2023-11-29 05:24:49,468 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 155 transitions. [2023-11-29 05:24:49,468 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:24:49,468 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 155 transitions. [2023-11-29 05:24:49,469 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 19.375) internal successors, (155), 8 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:24:49,471 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 37.0) internal successors, (333), 9 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:24:49,472 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 37.0) internal successors, (333), 9 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:24:49,472 INFO L175 Difference]: Start difference. First operand has 53 places, 47 transitions, 211 flow. Second operand 8 states and 155 transitions. [2023-11-29 05:24:49,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 113 transitions, 655 flow [2023-11-29 05:24:49,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 113 transitions, 627 flow, removed 3 selfloop flow, removed 4 redundant places. [2023-11-29 05:24:49,484 INFO L231 Difference]: Finished difference. Result has 60 places, 59 transitions, 359 flow [2023-11-29 05:24:49,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=193, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=359, PETRI_PLACES=60, PETRI_TRANSITIONS=59} [2023-11-29 05:24:49,485 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 20 predicate places. [2023-11-29 05:24:49,486 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 59 transitions, 359 flow [2023-11-29 05:24:49,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:24:49,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:24:49,486 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:24:49,494 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 05:24:49,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:24:49,693 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:24:49,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:24:49,693 INFO L85 PathProgramCache]: Analyzing trace with hash 765552735, now seen corresponding path program 4 times [2023-11-29 05:24:49,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:24:49,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314483081] [2023-11-29 05:24:49,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:24:49,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:24:49,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:24:49,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:24:49,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:24:49,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314483081] [2023-11-29 05:24:49,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314483081] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:24:49,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602540902] [2023-11-29 05:24:49,897 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 05:24:49,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:24:49,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:24:49,899 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:24:49,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 05:24:50,041 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 05:24:50,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:24:50,043 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 05:24:50,045 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:24:50,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:24:50,135 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:24:50,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:24:50,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602540902] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:24:50,214 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:24:50,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2023-11-29 05:24:50,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329168944] [2023-11-29 05:24:50,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:24:50,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 05:24:50,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:24:50,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 05:24:50,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2023-11-29 05:24:50,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 37 [2023-11-29 05:24:50,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 59 transitions, 359 flow. Second operand has 10 states, 10 states have (on average 13.0) internal successors, (130), 10 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) [2023-11-29 05:24:50,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:24:50,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 37 [2023-11-29 05:24:50,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:24:50,680 INFO L124 PetriNetUnfolderBase]: 1129/1977 cut-off events. [2023-11-29 05:24:50,680 INFO L125 PetriNetUnfolderBase]: For 2921/2929 co-relation queries the response was YES. [2023-11-29 05:24:50,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6097 conditions, 1977 events. 1129/1977 cut-off events. For 2921/2929 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 11272 event pairs, 626 based on Foata normal form. 38/1976 useless extension candidates. Maximal degree in co-relation 6077. Up to 924 conditions per place. [2023-11-29 05:24:50,700 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 42 selfloop transitions, 3 changer transitions 40/100 dead transitions. [2023-11-29 05:24:50,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 100 transitions, 743 flow [2023-11-29 05:24:50,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 05:24:50,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 05:24:50,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 115 transitions. [2023-11-29 05:24:50,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5180180180180181 [2023-11-29 05:24:50,702 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 115 transitions. [2023-11-29 05:24:50,702 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 115 transitions. [2023-11-29 05:24:50,702 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:24:50,702 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 115 transitions. [2023-11-29 05:24:50,703 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:24:50,705 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 37.0) internal successors, (259), 7 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:24:50,705 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 37.0) internal successors, (259), 7 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:24:50,705 INFO L175 Difference]: Start difference. First operand has 60 places, 59 transitions, 359 flow. Second operand 6 states and 115 transitions. [2023-11-29 05:24:50,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 100 transitions, 743 flow [2023-11-29 05:24:50,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 100 transitions, 731 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-11-29 05:24:50,722 INFO L231 Difference]: Finished difference. Result has 64 places, 60 transitions, 391 flow [2023-11-29 05:24:50,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=347, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=391, PETRI_PLACES=64, PETRI_TRANSITIONS=60} [2023-11-29 05:24:50,723 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 24 predicate places. [2023-11-29 05:24:50,724 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 60 transitions, 391 flow [2023-11-29 05:24:50,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.0) internal successors, (130), 10 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) [2023-11-29 05:24:50,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:24:50,724 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:24:50,731 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 05:24:50,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:24:50,925 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:24:50,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:24:50,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1275589004, now seen corresponding path program 5 times [2023-11-29 05:24:50,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:24:50,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9360621] [2023-11-29 05:24:50,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:24:50,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:24:51,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:24:52,926 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:24:52,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:24:52,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9360621] [2023-11-29 05:24:52,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9360621] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:24:52,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557384890] [2023-11-29 05:24:52,927 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 05:24:52,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:24:52,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:24:52,929 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:24:52,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 05:24:53,086 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:24:53,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:24:53,089 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 05:24:53,093 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:24:53,469 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:24:53,469 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:24:53,907 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:24:53,908 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 56 treesize of output 58 [2023-11-29 05:24:54,417 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:24:54,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557384890] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 05:24:54,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:24:54,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11, 8] total 23 [2023-11-29 05:24:54,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584009490] [2023-11-29 05:24:54,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:24:54,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 05:24:54,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:24:54,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 05:24:54,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2023-11-29 05:24:54,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2023-11-29 05:24:54,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 60 transitions, 391 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:24:54,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:24:54,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2023-11-29 05:24:54,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:24:55,156 INFO L124 PetriNetUnfolderBase]: 854/1454 cut-off events. [2023-11-29 05:24:55,157 INFO L125 PetriNetUnfolderBase]: For 2663/2668 co-relation queries the response was YES. [2023-11-29 05:24:55,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4670 conditions, 1454 events. 854/1454 cut-off events. For 2663/2668 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 7366 event pairs, 167 based on Foata normal form. 5/1456 useless extension candidates. Maximal degree in co-relation 4638. Up to 294 conditions per place. [2023-11-29 05:24:55,170 INFO L140 encePairwiseOnDemand]: 28/37 looper letters, 77 selfloop transitions, 22 changer transitions 21/124 dead transitions. [2023-11-29 05:24:55,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 124 transitions, 819 flow [2023-11-29 05:24:55,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 05:24:55,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-29 05:24:55,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2023-11-29 05:24:55,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4984984984984985 [2023-11-29 05:24:55,173 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 166 transitions. [2023-11-29 05:24:55,173 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 166 transitions. [2023-11-29 05:24:55,173 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:24:55,173 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 166 transitions. [2023-11-29 05:24:55,174 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 18.444444444444443) internal successors, (166), 9 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:24:55,175 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 37.0) internal successors, (370), 10 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:24:55,175 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 37.0) internal successors, (370), 10 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:24:55,175 INFO L175 Difference]: Start difference. First operand has 64 places, 60 transitions, 391 flow. Second operand 9 states and 166 transitions. [2023-11-29 05:24:55,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 124 transitions, 819 flow [2023-11-29 05:24:55,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 124 transitions, 779 flow, removed 18 selfloop flow, removed 4 redundant places. [2023-11-29 05:24:55,188 INFO L231 Difference]: Finished difference. Result has 70 places, 63 transitions, 441 flow [2023-11-29 05:24:55,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=355, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=441, PETRI_PLACES=70, PETRI_TRANSITIONS=63} [2023-11-29 05:24:55,189 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 30 predicate places. [2023-11-29 05:24:55,189 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 63 transitions, 441 flow [2023-11-29 05:24:55,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:24:55,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:24:55,190 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:24:55,196 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-29 05:24:55,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:24:55,392 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:24:55,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:24:55,392 INFO L85 PathProgramCache]: Analyzing trace with hash 2041689512, now seen corresponding path program 6 times [2023-11-29 05:24:55,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:24:55,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549802791] [2023-11-29 05:24:55,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:24:55,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:24:55,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:24:57,613 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:24:57,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:24:57,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549802791] [2023-11-29 05:24:57,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549802791] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:24:57,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489668127] [2023-11-29 05:24:57,614 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 05:24:57,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:24:57,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:24:57,620 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:24:57,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 05:24:57,846 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-11-29 05:24:57,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:24:57,848 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-29 05:24:57,852 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:24:58,157 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:24:58,157 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:24:58,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489668127] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:24:58,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 05:24:58,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 17 [2023-11-29 05:24:58,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608050044] [2023-11-29 05:24:58,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:24:58,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 05:24:58,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:24:58,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 05:24:58,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2023-11-29 05:24:58,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2023-11-29 05:24:58,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 63 transitions, 441 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:24:58,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:24:58,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2023-11-29 05:24:58,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:24:58,775 INFO L124 PetriNetUnfolderBase]: 872/1494 cut-off events. [2023-11-29 05:24:58,775 INFO L125 PetriNetUnfolderBase]: For 3298/3303 co-relation queries the response was YES. [2023-11-29 05:24:58,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4942 conditions, 1494 events. 872/1494 cut-off events. For 3298/3303 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 7671 event pairs, 199 based on Foata normal form. 5/1496 useless extension candidates. Maximal degree in co-relation 4918. Up to 525 conditions per place. [2023-11-29 05:24:58,792 INFO L140 encePairwiseOnDemand]: 28/37 looper letters, 76 selfloop transitions, 20 changer transitions 21/121 dead transitions. [2023-11-29 05:24:58,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 121 transitions, 840 flow [2023-11-29 05:24:58,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 05:24:58,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-29 05:24:58,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2023-11-29 05:24:58,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5371621621621622 [2023-11-29 05:24:58,794 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 159 transitions. [2023-11-29 05:24:58,794 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 159 transitions. [2023-11-29 05:24:58,794 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:24:58,794 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 159 transitions. [2023-11-29 05:24:58,795 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:24:58,796 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 37.0) internal successors, (333), 9 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:24:58,797 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 37.0) internal successors, (333), 9 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:24:58,797 INFO L175 Difference]: Start difference. First operand has 70 places, 63 transitions, 441 flow. Second operand 8 states and 159 transitions. [2023-11-29 05:24:58,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 121 transitions, 840 flow [2023-11-29 05:24:58,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 121 transitions, 795 flow, removed 8 selfloop flow, removed 5 redundant places. [2023-11-29 05:24:58,812 INFO L231 Difference]: Finished difference. Result has 73 places, 64 transitions, 459 flow [2023-11-29 05:24:58,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=399, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=459, PETRI_PLACES=73, PETRI_TRANSITIONS=64} [2023-11-29 05:24:58,813 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 33 predicate places. [2023-11-29 05:24:58,813 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 64 transitions, 459 flow [2023-11-29 05:24:58,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:24:58,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:24:58,814 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:24:58,821 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 05:24:59,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:24:59,015 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:24:59,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:24:59,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1737680986, now seen corresponding path program 7 times [2023-11-29 05:24:59,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:24:59,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333878525] [2023-11-29 05:24:59,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:24:59,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:24:59,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:25:01,170 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:25:01,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:25:01,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333878525] [2023-11-29 05:25:01,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333878525] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:25:01,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069982161] [2023-11-29 05:25:01,171 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 05:25:01,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:25:01,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:25:01,172 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:25:01,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 05:25:01,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:25:01,342 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-29 05:25:01,346 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:25:01,993 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:25:01,994 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:25:02,499 INFO L349 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-11-29 05:25:02,499 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 60 [2023-11-29 05:25:04,230 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:25:04,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069982161] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:25:04,231 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:25:04,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2023-11-29 05:25:04,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630848727] [2023-11-29 05:25:04,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:25:04,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-29 05:25:04,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:25:04,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-29 05:25:04,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=858, Unknown=0, NotChecked=0, Total=992 [2023-11-29 05:25:04,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2023-11-29 05:25:04,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 64 transitions, 459 flow. Second operand has 32 states, 32 states have (on average 9.4375) internal successors, (302), 32 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:25:04,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:25:04,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2023-11-29 05:25:04,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:25:08,755 INFO L124 PetriNetUnfolderBase]: 2277/4005 cut-off events. [2023-11-29 05:25:08,756 INFO L125 PetriNetUnfolderBase]: For 9137/9152 co-relation queries the response was YES. [2023-11-29 05:25:08,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12928 conditions, 4005 events. 2277/4005 cut-off events. For 9137/9152 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 25464 event pairs, 784 based on Foata normal form. 14/4016 useless extension candidates. Maximal degree in co-relation 12887. Up to 1289 conditions per place. [2023-11-29 05:25:08,789 INFO L140 encePairwiseOnDemand]: 24/37 looper letters, 212 selfloop transitions, 51 changer transitions 29/296 dead transitions. [2023-11-29 05:25:08,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 296 transitions, 2076 flow [2023-11-29 05:25:08,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-29 05:25:08,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-29 05:25:08,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 408 transitions. [2023-11-29 05:25:08,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4794359576968273 [2023-11-29 05:25:08,792 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 408 transitions. [2023-11-29 05:25:08,792 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 408 transitions. [2023-11-29 05:25:08,792 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:25:08,793 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 408 transitions. [2023-11-29 05:25:08,794 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 17.73913043478261) internal successors, (408), 23 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:25:08,796 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 37.0) internal successors, (888), 24 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:25:08,796 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 37.0) internal successors, (888), 24 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:25:08,796 INFO L175 Difference]: Start difference. First operand has 73 places, 64 transitions, 459 flow. Second operand 23 states and 408 transitions. [2023-11-29 05:25:08,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 296 transitions, 2076 flow [2023-11-29 05:25:08,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 296 transitions, 1982 flow, removed 13 selfloop flow, removed 6 redundant places. [2023-11-29 05:25:08,836 INFO L231 Difference]: Finished difference. Result has 103 places, 112 transitions, 1140 flow [2023-11-29 05:25:08,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=419, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1140, PETRI_PLACES=103, PETRI_TRANSITIONS=112} [2023-11-29 05:25:08,837 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 63 predicate places. [2023-11-29 05:25:08,838 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 112 transitions, 1140 flow [2023-11-29 05:25:08,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 9.4375) internal successors, (302), 32 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:25:08,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:25:08,838 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:25:08,846 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 05:25:09,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:25:09,045 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:25:09,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:25:09,045 INFO L85 PathProgramCache]: Analyzing trace with hash 132130216, now seen corresponding path program 8 times [2023-11-29 05:25:09,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:25:09,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485941269] [2023-11-29 05:25:09,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:25:09,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:25:09,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:25:10,716 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:25:10,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:25:10,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485941269] [2023-11-29 05:25:10,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485941269] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:25:10,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265342569] [2023-11-29 05:25:10,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:25:10,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:25:10,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:25:10,718 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:25:10,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 05:25:10,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 05:25:10,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:25:10,900 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-29 05:25:10,903 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:25:11,154 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:25:11,154 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:25:11,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265342569] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:25:11,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 05:25:11,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 17 [2023-11-29 05:25:11,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58300161] [2023-11-29 05:25:11,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:25:11,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 05:25:11,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:25:11,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 05:25:11,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2023-11-29 05:25:11,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2023-11-29 05:25:11,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 112 transitions, 1140 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:25:11,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:25:11,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2023-11-29 05:25:11,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:25:11,958 INFO L124 PetriNetUnfolderBase]: 2297/4027 cut-off events. [2023-11-29 05:25:11,958 INFO L125 PetriNetUnfolderBase]: For 16916/16942 co-relation queries the response was YES. [2023-11-29 05:25:11,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14828 conditions, 4027 events. 2297/4027 cut-off events. For 16916/16942 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 25447 event pairs, 662 based on Foata normal form. 25/4049 useless extension candidates. Maximal degree in co-relation 14777. Up to 2059 conditions per place. [2023-11-29 05:25:12,008 INFO L140 encePairwiseOnDemand]: 28/37 looper letters, 97 selfloop transitions, 40 changer transitions 22/163 dead transitions. [2023-11-29 05:25:12,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 163 transitions, 1655 flow [2023-11-29 05:25:12,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 05:25:12,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-29 05:25:12,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2023-11-29 05:25:12,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4966216216216216 [2023-11-29 05:25:12,011 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 147 transitions. [2023-11-29 05:25:12,011 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 147 transitions. [2023-11-29 05:25:12,011 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:25:12,011 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 147 transitions. [2023-11-29 05:25:12,012 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 18.375) internal successors, (147), 8 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:25:12,013 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 37.0) internal successors, (333), 9 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:25:12,013 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 37.0) internal successors, (333), 9 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:25:12,014 INFO L175 Difference]: Start difference. First operand has 103 places, 112 transitions, 1140 flow. Second operand 8 states and 147 transitions. [2023-11-29 05:25:12,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 163 transitions, 1655 flow [2023-11-29 05:25:12,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 163 transitions, 1557 flow, removed 47 selfloop flow, removed 5 redundant places. [2023-11-29 05:25:12,121 INFO L231 Difference]: Finished difference. Result has 106 places, 113 transitions, 1164 flow [2023-11-29 05:25:12,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1046, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1164, PETRI_PLACES=106, PETRI_TRANSITIONS=113} [2023-11-29 05:25:12,122 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 66 predicate places. [2023-11-29 05:25:12,122 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 113 transitions, 1164 flow [2023-11-29 05:25:12,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:25:12,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:25:12,123 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:25:12,130 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-29 05:25:12,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 05:25:12,331 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:25:12,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:25:12,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1459283845, now seen corresponding path program 9 times [2023-11-29 05:25:12,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:25:12,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462098054] [2023-11-29 05:25:12,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:25:12,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:25:12,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:25:14,078 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:25:14,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:25:14,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462098054] [2023-11-29 05:25:14,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462098054] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:25:14,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241889824] [2023-11-29 05:25:14,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:25:14,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:25:14,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:25:14,080 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:25:14,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 05:25:14,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-29 05:25:14,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:25:14,251 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 05:25:14,253 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:25:14,485 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 05:25:14,485 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:25:14,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241889824] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:25:14,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 05:25:14,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [12] total 18 [2023-11-29 05:25:14,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644049837] [2023-11-29 05:25:14,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:25:14,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 05:25:14,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:25:14,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 05:25:14,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2023-11-29 05:25:14,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2023-11-29 05:25:14,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 113 transitions, 1164 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:25:14,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:25:14,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2023-11-29 05:25:14,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:25:15,163 INFO L124 PetriNetUnfolderBase]: 2301/4033 cut-off events. [2023-11-29 05:25:15,164 INFO L125 PetriNetUnfolderBase]: For 19260/19286 co-relation queries the response was YES. [2023-11-29 05:25:15,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15091 conditions, 4033 events. 2301/4033 cut-off events. For 19260/19286 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 25447 event pairs, 708 based on Foata normal form. 24/4054 useless extension candidates. Maximal degree in co-relation 15038. Up to 2413 conditions per place. [2023-11-29 05:25:15,187 INFO L140 encePairwiseOnDemand]: 28/37 looper letters, 105 selfloop transitions, 38 changer transitions 21/168 dead transitions. [2023-11-29 05:25:15,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 168 transitions, 1713 flow [2023-11-29 05:25:15,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 05:25:15,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-29 05:25:15,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2023-11-29 05:25:15,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5202702702702703 [2023-11-29 05:25:15,188 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 154 transitions. [2023-11-29 05:25:15,188 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 154 transitions. [2023-11-29 05:25:15,188 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:25:15,188 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 154 transitions. [2023-11-29 05:25:15,189 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 19.25) internal successors, (154), 8 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:25:15,189 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 37.0) internal successors, (333), 9 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:25:15,189 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 37.0) internal successors, (333), 9 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:25:15,190 INFO L175 Difference]: Start difference. First operand has 106 places, 113 transitions, 1164 flow. Second operand 8 states and 154 transitions. [2023-11-29 05:25:15,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 168 transitions, 1713 flow [2023-11-29 05:25:15,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 168 transitions, 1623 flow, removed 14 selfloop flow, removed 5 redundant places. [2023-11-29 05:25:15,258 INFO L231 Difference]: Finished difference. Result has 108 places, 115 transitions, 1206 flow [2023-11-29 05:25:15,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1083, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1206, PETRI_PLACES=108, PETRI_TRANSITIONS=115} [2023-11-29 05:25:15,259 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 68 predicate places. [2023-11-29 05:25:15,259 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 115 transitions, 1206 flow [2023-11-29 05:25:15,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:25:15,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:25:15,260 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:25:15,265 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 05:25:15,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-29 05:25:15,460 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:25:15,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:25:15,461 INFO L85 PathProgramCache]: Analyzing trace with hash 36581817, now seen corresponding path program 1 times [2023-11-29 05:25:15,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:25:15,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628687489] [2023-11-29 05:25:15,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:25:15,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:25:15,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:25:15,591 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:25:15,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:25:15,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628687489] [2023-11-29 05:25:15,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628687489] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:25:15,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636396862] [2023-11-29 05:25:15,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:25:15,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:25:15,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:25:15,593 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:25:15,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 05:25:15,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:25:15,716 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 05:25:15,717 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:25:15,747 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:25:15,747 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:25:15,781 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:25:15,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636396862] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 05:25:15,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:25:15,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 5] total 7 [2023-11-29 05:25:15,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010763753] [2023-11-29 05:25:15,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:25:15,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 05:25:15,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:25:15,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 05:25:15,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-11-29 05:25:15,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2023-11-29 05:25:15,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 115 transitions, 1206 flow. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:25:15,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:25:15,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2023-11-29 05:25:15,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:25:16,477 INFO L124 PetriNetUnfolderBase]: 2910/4913 cut-off events. [2023-11-29 05:25:16,477 INFO L125 PetriNetUnfolderBase]: For 20531/20548 co-relation queries the response was YES. [2023-11-29 05:25:16,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17511 conditions, 4913 events. 2910/4913 cut-off events. For 20531/20548 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 30483 event pairs, 686 based on Foata normal form. 7/4339 useless extension candidates. Maximal degree in co-relation 17457. Up to 2436 conditions per place. [2023-11-29 05:25:16,526 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 119 selfloop transitions, 11 changer transitions 0/163 dead transitions. [2023-11-29 05:25:16,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 163 transitions, 1954 flow [2023-11-29 05:25:16,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 05:25:16,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 05:25:16,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 87 transitions. [2023-11-29 05:25:16,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5878378378378378 [2023-11-29 05:25:16,528 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 87 transitions. [2023-11-29 05:25:16,528 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 87 transitions. [2023-11-29 05:25:16,528 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:25:16,528 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 87 transitions. [2023-11-29 05:25:16,529 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:25:16,529 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 37.0) internal successors, (185), 5 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:25:16,530 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 37.0) internal successors, (185), 5 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:25:16,530 INFO L175 Difference]: Start difference. First operand has 108 places, 115 transitions, 1206 flow. Second operand 4 states and 87 transitions. [2023-11-29 05:25:16,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 163 transitions, 1954 flow [2023-11-29 05:25:16,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 163 transitions, 1825 flow, removed 8 selfloop flow, removed 6 redundant places. [2023-11-29 05:25:16,625 INFO L231 Difference]: Finished difference. Result has 106 places, 120 transitions, 1215 flow [2023-11-29 05:25:16,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1103, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1215, PETRI_PLACES=106, PETRI_TRANSITIONS=120} [2023-11-29 05:25:16,626 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 66 predicate places. [2023-11-29 05:25:16,627 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 120 transitions, 1215 flow [2023-11-29 05:25:16,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:25:16,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:25:16,627 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:25:16,635 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 05:25:16,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-29 05:25:16,828 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:25:16,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:25:16,828 INFO L85 PathProgramCache]: Analyzing trace with hash -652592877, now seen corresponding path program 2 times [2023-11-29 05:25:16,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:25:16,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536907094] [2023-11-29 05:25:16,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:25:16,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:25:16,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:25:16,937 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:25:16,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:25:16,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536907094] [2023-11-29 05:25:16,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536907094] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:25:16,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:25:16,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 05:25:16,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964588094] [2023-11-29 05:25:16,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:25:16,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 05:25:16,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:25:16,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 05:25:16,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 05:25:16,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2023-11-29 05:25:16,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 120 transitions, 1215 flow. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:25:16,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:25:16,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2023-11-29 05:25:16,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:25:17,819 INFO L124 PetriNetUnfolderBase]: 2995/5168 cut-off events. [2023-11-29 05:25:17,819 INFO L125 PetriNetUnfolderBase]: For 19022/19033 co-relation queries the response was YES. [2023-11-29 05:25:17,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19124 conditions, 5168 events. 2995/5168 cut-off events. For 19022/19033 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 33487 event pairs, 1680 based on Foata normal form. 33/5149 useless extension candidates. Maximal degree in co-relation 18586. Up to 3866 conditions per place. [2023-11-29 05:25:17,870 INFO L140 encePairwiseOnDemand]: 30/37 looper letters, 110 selfloop transitions, 19 changer transitions 5/167 dead transitions. [2023-11-29 05:25:17,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 167 transitions, 1853 flow [2023-11-29 05:25:17,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 05:25:17,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 05:25:17,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 95 transitions. [2023-11-29 05:25:17,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5135135135135135 [2023-11-29 05:25:17,872 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 95 transitions. [2023-11-29 05:25:17,872 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 95 transitions. [2023-11-29 05:25:17,873 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:25:17,873 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 95 transitions. [2023-11-29 05:25:17,873 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:25:17,874 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 37.0) internal successors, (222), 6 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:25:17,874 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 37.0) internal successors, (222), 6 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:25:17,874 INFO L175 Difference]: Start difference. First operand has 106 places, 120 transitions, 1215 flow. Second operand 5 states and 95 transitions. [2023-11-29 05:25:17,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 167 transitions, 1853 flow [2023-11-29 05:25:17,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 167 transitions, 1853 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-29 05:25:18,003 INFO L231 Difference]: Finished difference. Result has 113 places, 131 transitions, 1378 flow [2023-11-29 05:25:18,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1215, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1378, PETRI_PLACES=113, PETRI_TRANSITIONS=131} [2023-11-29 05:25:18,004 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 73 predicate places. [2023-11-29 05:25:18,004 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 131 transitions, 1378 flow [2023-11-29 05:25:18,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:25:18,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:25:18,005 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:25:18,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-29 05:25:18,005 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:25:18,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:25:18,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1717171930, now seen corresponding path program 1 times [2023-11-29 05:25:18,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:25:18,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543717380] [2023-11-29 05:25:18,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:25:18,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:25:18,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:25:18,146 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:25:18,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:25:18,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543717380] [2023-11-29 05:25:18,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543717380] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:25:18,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:25:18,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 05:25:18,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27850528] [2023-11-29 05:25:18,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:25:18,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 05:25:18,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:25:18,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 05:25:18,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-29 05:25:18,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2023-11-29 05:25:18,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 131 transitions, 1378 flow. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:25:18,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:25:18,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2023-11-29 05:25:18,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:25:18,966 INFO L124 PetriNetUnfolderBase]: 3037/5359 cut-off events. [2023-11-29 05:25:18,967 INFO L125 PetriNetUnfolderBase]: For 23299/23312 co-relation queries the response was YES. [2023-11-29 05:25:18,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21623 conditions, 5359 events. 3037/5359 cut-off events. For 23299/23312 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 35517 event pairs, 1501 based on Foata normal form. 87/5401 useless extension candidates. Maximal degree in co-relation 21271. Up to 3505 conditions per place. [2023-11-29 05:25:19,017 INFO L140 encePairwiseOnDemand]: 29/37 looper letters, 113 selfloop transitions, 30 changer transitions 7/181 dead transitions. [2023-11-29 05:25:19,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 181 transitions, 2099 flow [2023-11-29 05:25:19,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 05:25:19,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 05:25:19,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 98 transitions. [2023-11-29 05:25:19,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5297297297297298 [2023-11-29 05:25:19,019 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 98 transitions. [2023-11-29 05:25:19,019 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 98 transitions. [2023-11-29 05:25:19,019 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:25:19,019 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 98 transitions. [2023-11-29 05:25:19,020 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:25:19,020 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 37.0) internal successors, (222), 6 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:25:19,021 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 37.0) internal successors, (222), 6 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:25:19,021 INFO L175 Difference]: Start difference. First operand has 113 places, 131 transitions, 1378 flow. Second operand 5 states and 98 transitions. [2023-11-29 05:25:19,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 181 transitions, 2099 flow [2023-11-29 05:25:19,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 181 transitions, 2044 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-11-29 05:25:19,227 INFO L231 Difference]: Finished difference. Result has 117 places, 133 transitions, 1448 flow [2023-11-29 05:25:19,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1288, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1448, PETRI_PLACES=117, PETRI_TRANSITIONS=133} [2023-11-29 05:25:19,228 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 77 predicate places. [2023-11-29 05:25:19,228 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 133 transitions, 1448 flow [2023-11-29 05:25:19,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:25:19,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:25:19,229 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:25:19,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-29 05:25:19,229 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:25:19,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:25:19,229 INFO L85 PathProgramCache]: Analyzing trace with hash -2063842926, now seen corresponding path program 2 times [2023-11-29 05:25:19,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:25:19,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848530478] [2023-11-29 05:25:19,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:25:19,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:25:19,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:25:19,369 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:25:19,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:25:19,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848530478] [2023-11-29 05:25:19,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848530478] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:25:19,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:25:19,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 05:25:19,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841359374] [2023-11-29 05:25:19,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:25:19,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 05:25:19,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:25:19,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 05:25:19,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-29 05:25:19,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2023-11-29 05:25:19,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 133 transitions, 1448 flow. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:25:19,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:25:19,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2023-11-29 05:25:19,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:25:20,462 INFO L124 PetriNetUnfolderBase]: 3150/5563 cut-off events. [2023-11-29 05:25:20,462 INFO L125 PetriNetUnfolderBase]: For 27237/27260 co-relation queries the response was YES. [2023-11-29 05:25:20,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24522 conditions, 5563 events. 3150/5563 cut-off events. For 27237/27260 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 37315 event pairs, 470 based on Foata normal form. 61/5595 useless extension candidates. Maximal degree in co-relation 23922. Up to 2859 conditions per place. [2023-11-29 05:25:20,516 INFO L140 encePairwiseOnDemand]: 29/37 looper letters, 137 selfloop transitions, 32 changer transitions 4/204 dead transitions. [2023-11-29 05:25:20,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 204 transitions, 2395 flow [2023-11-29 05:25:20,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 05:25:20,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 05:25:20,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2023-11-29 05:25:20,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5212355212355212 [2023-11-29 05:25:20,518 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 135 transitions. [2023-11-29 05:25:20,518 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 135 transitions. [2023-11-29 05:25:20,518 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:25:20,518 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 135 transitions. [2023-11-29 05:25:20,519 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:25:20,519 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 37.0) internal successors, (296), 8 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:25:20,520 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 37.0) internal successors, (296), 8 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:25:20,520 INFO L175 Difference]: Start difference. First operand has 117 places, 133 transitions, 1448 flow. Second operand 7 states and 135 transitions. [2023-11-29 05:25:20,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 204 transitions, 2395 flow [2023-11-29 05:25:20,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 204 transitions, 2381 flow, removed 7 selfloop flow, removed 1 redundant places. [2023-11-29 05:25:20,664 INFO L231 Difference]: Finished difference. Result has 123 places, 135 transitions, 1543 flow [2023-11-29 05:25:20,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1434, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1543, PETRI_PLACES=123, PETRI_TRANSITIONS=135} [2023-11-29 05:25:20,665 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 83 predicate places. [2023-11-29 05:25:20,665 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 135 transitions, 1543 flow [2023-11-29 05:25:20,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:25:20,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:25:20,665 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:25:20,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-29 05:25:20,666 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:25:20,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:25:20,666 INFO L85 PathProgramCache]: Analyzing trace with hash 16593486, now seen corresponding path program 3 times [2023-11-29 05:25:20,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:25:20,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247303433] [2023-11-29 05:25:20,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:25:20,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:25:20,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:25:20,811 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:25:20,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:25:20,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247303433] [2023-11-29 05:25:20,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247303433] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:25:20,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:25:20,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 05:25:20,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87374335] [2023-11-29 05:25:20,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:25:20,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 05:25:20,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:25:20,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 05:25:20,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 05:25:20,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2023-11-29 05:25:20,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 135 transitions, 1543 flow. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:25:20,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:25:20,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2023-11-29 05:25:20,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:25:22,017 INFO L124 PetriNetUnfolderBase]: 3144/5564 cut-off events. [2023-11-29 05:25:22,017 INFO L125 PetriNetUnfolderBase]: For 32546/32608 co-relation queries the response was YES. [2023-11-29 05:25:22,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24877 conditions, 5564 events. 3144/5564 cut-off events. For 32546/32608 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 37260 event pairs, 1216 based on Foata normal form. 228/5692 useless extension candidates. Maximal degree in co-relation 24257. Up to 2553 conditions per place. [2023-11-29 05:25:22,059 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 122 selfloop transitions, 16 changer transitions 20/186 dead transitions. [2023-11-29 05:25:22,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 186 transitions, 2234 flow [2023-11-29 05:25:22,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 05:25:22,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 05:25:22,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 108 transitions. [2023-11-29 05:25:22,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5837837837837838 [2023-11-29 05:25:22,060 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 108 transitions. [2023-11-29 05:25:22,061 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 108 transitions. [2023-11-29 05:25:22,061 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:25:22,061 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 108 transitions. [2023-11-29 05:25:22,062 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 21.6) internal successors, (108), 5 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:25:22,062 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 37.0) internal successors, (222), 6 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:25:22,063 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 37.0) internal successors, (222), 6 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:25:22,063 INFO L175 Difference]: Start difference. First operand has 123 places, 135 transitions, 1543 flow. Second operand 5 states and 108 transitions. [2023-11-29 05:25:22,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 186 transitions, 2234 flow [2023-11-29 05:25:22,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 186 transitions, 2150 flow, removed 17 selfloop flow, removed 4 redundant places. [2023-11-29 05:25:22,194 INFO L231 Difference]: Finished difference. Result has 125 places, 127 transitions, 1405 flow [2023-11-29 05:25:22,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1446, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1405, PETRI_PLACES=125, PETRI_TRANSITIONS=127} [2023-11-29 05:25:22,194 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 85 predicate places. [2023-11-29 05:25:22,195 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 127 transitions, 1405 flow [2023-11-29 05:25:22,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:25:22,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:25:22,195 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:25:22,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-29 05:25:22,195 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:25:22,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:25:22,195 INFO L85 PathProgramCache]: Analyzing trace with hash 1235375560, now seen corresponding path program 4 times [2023-11-29 05:25:22,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:25:22,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618988907] [2023-11-29 05:25:22,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:25:22,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:25:22,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:25:22,317 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:25:22,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:25:22,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618988907] [2023-11-29 05:25:22,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618988907] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:25:22,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130596531] [2023-11-29 05:25:22,317 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 05:25:22,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:25:22,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:25:22,319 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:25:22,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 05:25:22,479 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 05:25:22,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:25:22,481 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 05:25:22,483 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:25:22,514 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:25:22,514 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:25:22,548 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:25:22,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130596531] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:25:22,548 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:25:22,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2023-11-29 05:25:22,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341190496] [2023-11-29 05:25:22,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:25:22,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 05:25:22,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:25:22,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 05:25:22,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2023-11-29 05:25:22,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2023-11-29 05:25:22,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 127 transitions, 1405 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:25:22,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:25:22,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2023-11-29 05:25:22,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:25:23,376 INFO L124 PetriNetUnfolderBase]: 2520/4490 cut-off events. [2023-11-29 05:25:23,376 INFO L125 PetriNetUnfolderBase]: For 25859/25886 co-relation queries the response was YES. [2023-11-29 05:25:23,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20400 conditions, 4490 events. 2520/4490 cut-off events. For 25859/25886 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 29224 event pairs, 966 based on Foata normal form. 77/4524 useless extension candidates. Maximal degree in co-relation 19765. Up to 2528 conditions per place. [2023-11-29 05:25:23,413 INFO L140 encePairwiseOnDemand]: 30/37 looper letters, 118 selfloop transitions, 31 changer transitions 10/183 dead transitions. [2023-11-29 05:25:23,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 183 transitions, 2195 flow [2023-11-29 05:25:23,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 05:25:23,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 05:25:23,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2023-11-29 05:25:23,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5019305019305019 [2023-11-29 05:25:23,414 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 130 transitions. [2023-11-29 05:25:23,414 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 130 transitions. [2023-11-29 05:25:23,414 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:25:23,414 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 130 transitions. [2023-11-29 05:25:23,415 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 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) [2023-11-29 05:25:23,416 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 37.0) internal successors, (296), 8 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:25:23,416 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 37.0) internal successors, (296), 8 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:25:23,416 INFO L175 Difference]: Start difference. First operand has 125 places, 127 transitions, 1405 flow. Second operand 7 states and 130 transitions. [2023-11-29 05:25:23,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 183 transitions, 2195 flow [2023-11-29 05:25:23,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 183 transitions, 2114 flow, removed 17 selfloop flow, removed 5 redundant places. [2023-11-29 05:25:23,516 INFO L231 Difference]: Finished difference. Result has 125 places, 118 transitions, 1317 flow [2023-11-29 05:25:23,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1279, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1317, PETRI_PLACES=125, PETRI_TRANSITIONS=118} [2023-11-29 05:25:23,517 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 85 predicate places. [2023-11-29 05:25:23,517 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 118 transitions, 1317 flow [2023-11-29 05:25:23,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:25:23,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:25:23,518 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:25:23,523 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 05:25:23,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 05:25:23,718 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:25:23,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:25:23,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1430490331, now seen corresponding path program 3 times [2023-11-29 05:25:23,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:25:23,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242068472] [2023-11-29 05:25:23,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:25:23,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:25:23,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:25:23,813 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:25:23,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:25:23,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242068472] [2023-11-29 05:25:23,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242068472] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:25:23,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:25:23,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 05:25:23,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380975648] [2023-11-29 05:25:23,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:25:23,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 05:25:23,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:25:23,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 05:25:23,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 05:25:23,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2023-11-29 05:25:23,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 118 transitions, 1317 flow. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:25:23,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:25:23,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2023-11-29 05:25:23,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:25:24,380 INFO L124 PetriNetUnfolderBase]: 1982/3506 cut-off events. [2023-11-29 05:25:24,380 INFO L125 PetriNetUnfolderBase]: For 22724/22744 co-relation queries the response was YES. [2023-11-29 05:25:24,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16583 conditions, 3506 events. 1982/3506 cut-off events. For 22724/22744 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 20920 event pairs, 805 based on Foata normal form. 84/3545 useless extension candidates. Maximal degree in co-relation 16443. Up to 2065 conditions per place. [2023-11-29 05:25:24,401 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 83 selfloop transitions, 16 changer transitions 19/137 dead transitions. [2023-11-29 05:25:24,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 137 transitions, 1675 flow [2023-11-29 05:25:24,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 05:25:24,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 05:25:24,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 91 transitions. [2023-11-29 05:25:24,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4918918918918919 [2023-11-29 05:25:24,402 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 91 transitions. [2023-11-29 05:25:24,402 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 91 transitions. [2023-11-29 05:25:24,403 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:25:24,403 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 91 transitions. [2023-11-29 05:25:24,403 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:25:24,404 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 37.0) internal successors, (222), 6 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:25:24,404 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 37.0) internal successors, (222), 6 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:25:24,404 INFO L175 Difference]: Start difference. First operand has 125 places, 118 transitions, 1317 flow. Second operand 5 states and 91 transitions. [2023-11-29 05:25:24,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 137 transitions, 1675 flow [2023-11-29 05:25:24,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 137 transitions, 1583 flow, removed 19 selfloop flow, removed 11 redundant places. [2023-11-29 05:25:24,453 INFO L231 Difference]: Finished difference. Result has 116 places, 103 transitions, 1112 flow [2023-11-29 05:25:24,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1163, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1112, PETRI_PLACES=116, PETRI_TRANSITIONS=103} [2023-11-29 05:25:24,454 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 76 predicate places. [2023-11-29 05:25:24,454 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 103 transitions, 1112 flow [2023-11-29 05:25:24,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:25:24,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:25:24,454 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:25:24,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-29 05:25:24,454 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:25:24,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:25:24,454 INFO L85 PathProgramCache]: Analyzing trace with hash 2044862349, now seen corresponding path program 1 times [2023-11-29 05:25:24,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:25:24,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086365614] [2023-11-29 05:25:24,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:25:24,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:25:24,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:25:26,090 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:25:26,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:25:26,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086365614] [2023-11-29 05:25:26,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086365614] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:25:26,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443432850] [2023-11-29 05:25:26,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:25:26,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:25:26,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:25:26,092 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:25:26,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 05:25:26,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:25:26,224 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-29 05:25:26,227 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:25:26,855 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:25:26,855 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:25:27,347 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:25:27,348 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 60 [2023-11-29 05:25:29,143 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:25:29,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443432850] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:25:29,143 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:25:29,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 36 [2023-11-29 05:25:29,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430234218] [2023-11-29 05:25:29,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:25:29,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-29 05:25:29,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:25:29,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-29 05:25:29,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1154, Unknown=0, NotChecked=0, Total=1332 [2023-11-29 05:25:29,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2023-11-29 05:25:29,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 103 transitions, 1112 flow. Second operand has 37 states, 37 states have (on average 9.432432432432432) internal successors, (349), 37 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:25:29,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:25:29,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2023-11-29 05:25:29,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:25:34,763 INFO L124 PetriNetUnfolderBase]: 3011/5293 cut-off events. [2023-11-29 05:25:34,763 INFO L125 PetriNetUnfolderBase]: For 25563/25632 co-relation queries the response was YES. [2023-11-29 05:25:34,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23610 conditions, 5293 events. 3011/5293 cut-off events. For 25563/25632 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 33674 event pairs, 559 based on Foata normal form. 48/5294 useless extension candidates. Maximal degree in co-relation 22269. Up to 713 conditions per place. [2023-11-29 05:25:34,809 INFO L140 encePairwiseOnDemand]: 24/37 looper letters, 255 selfloop transitions, 82 changer transitions 84/437 dead transitions. [2023-11-29 05:25:34,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 437 transitions, 3765 flow [2023-11-29 05:25:34,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-29 05:25:34,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-11-29 05:25:34,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 620 transitions. [2023-11-29 05:25:34,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4528853177501826 [2023-11-29 05:25:34,813 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 620 transitions. [2023-11-29 05:25:34,813 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 620 transitions. [2023-11-29 05:25:34,814 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:25:34,815 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 620 transitions. [2023-11-29 05:25:34,818 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 16.756756756756758) internal successors, (620), 37 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:25:34,821 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 37.0) internal successors, (1406), 38 states have internal predecessors, (1406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:25:34,822 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 37.0) internal successors, (1406), 38 states have internal predecessors, (1406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:25:34,822 INFO L175 Difference]: Start difference. First operand has 116 places, 103 transitions, 1112 flow. Second operand 37 states and 620 transitions. [2023-11-29 05:25:34,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 437 transitions, 3765 flow [2023-11-29 05:25:34,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 437 transitions, 3671 flow, removed 12 selfloop flow, removed 5 redundant places. [2023-11-29 05:25:34,909 INFO L231 Difference]: Finished difference. Result has 154 places, 152 transitions, 1803 flow [2023-11-29 05:25:34,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1068, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=1803, PETRI_PLACES=154, PETRI_TRANSITIONS=152} [2023-11-29 05:25:34,909 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 114 predicate places. [2023-11-29 05:25:34,910 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 152 transitions, 1803 flow [2023-11-29 05:25:34,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 9.432432432432432) internal successors, (349), 37 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:25:34,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:25:34,910 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:25:34,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-29 05:25:35,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:25:35,111 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:25:35,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:25:35,111 INFO L85 PathProgramCache]: Analyzing trace with hash 1630559081, now seen corresponding path program 2 times [2023-11-29 05:25:35,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:25:35,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469535659] [2023-11-29 05:25:35,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:25:35,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:25:35,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:25:36,828 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:25:36,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:25:36,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469535659] [2023-11-29 05:25:36,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469535659] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:25:36,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239282579] [2023-11-29 05:25:36,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:25:36,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:25:36,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:25:36,830 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:25:36,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 05:25:36,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:25:36,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:25:36,990 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-29 05:25:36,992 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:25:37,075 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 05:25:37,621 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:25:37,621 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:25:39,048 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 70 [2023-11-29 05:25:39,111 INFO L349 Elim1Store]: treesize reduction 13, result has 64.9 percent of original size [2023-11-29 05:25:39,111 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 167 treesize of output 138 [2023-11-29 05:25:39,553 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:25:39,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239282579] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:25:39,553 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:25:39,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 35 [2023-11-29 05:25:39,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774114570] [2023-11-29 05:25:39,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:25:39,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-11-29 05:25:39,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:25:39,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-11-29 05:25:39,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1078, Unknown=0, NotChecked=0, Total=1260 [2023-11-29 05:25:39,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2023-11-29 05:25:39,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 152 transitions, 1803 flow. Second operand has 36 states, 36 states have (on average 9.5) internal successors, (342), 36 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:25:39,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:25:39,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2023-11-29 05:25:39,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:25:52,748 INFO L124 PetriNetUnfolderBase]: 6836/11765 cut-off events. [2023-11-29 05:25:52,748 INFO L125 PetriNetUnfolderBase]: For 73141/73292 co-relation queries the response was YES. [2023-11-29 05:25:52,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58647 conditions, 11765 events. 6836/11765 cut-off events. For 73141/73292 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 84993 event pairs, 1645 based on Foata normal form. 123/11780 useless extension candidates. Maximal degree in co-relation 58577. Up to 1832 conditions per place. [2023-11-29 05:25:52,882 INFO L140 encePairwiseOnDemand]: 24/37 looper letters, 448 selfloop transitions, 181 changer transitions 63/708 dead transitions. [2023-11-29 05:25:52,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 708 transitions, 7386 flow [2023-11-29 05:25:52,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-11-29 05:25:52,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2023-11-29 05:25:52,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 855 transitions. [2023-11-29 05:25:52,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45310015898251194 [2023-11-29 05:25:52,886 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 855 transitions. [2023-11-29 05:25:52,886 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 855 transitions. [2023-11-29 05:25:52,886 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:25:52,886 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 855 transitions. [2023-11-29 05:25:52,889 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 16.764705882352942) internal successors, (855), 51 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:25:52,893 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 37.0) internal successors, (1924), 52 states have internal predecessors, (1924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:25:52,893 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 37.0) internal successors, (1924), 52 states have internal predecessors, (1924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:25:52,893 INFO L175 Difference]: Start difference. First operand has 154 places, 152 transitions, 1803 flow. Second operand 51 states and 855 transitions. [2023-11-29 05:25:52,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 708 transitions, 7386 flow [2023-11-29 05:25:53,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 708 transitions, 6766 flow, removed 210 selfloop flow, removed 17 redundant places. [2023-11-29 05:25:53,634 INFO L231 Difference]: Finished difference. Result has 197 places, 287 transitions, 3889 flow [2023-11-29 05:25:53,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1573, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=3889, PETRI_PLACES=197, PETRI_TRANSITIONS=287} [2023-11-29 05:25:53,635 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 157 predicate places. [2023-11-29 05:25:53,635 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 287 transitions, 3889 flow [2023-11-29 05:25:53,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 9.5) internal successors, (342), 36 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:25:53,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:25:53,635 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:25:53,641 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 05:25:53,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:25:53,836 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:25:53,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:25:53,837 INFO L85 PathProgramCache]: Analyzing trace with hash -2100635233, now seen corresponding path program 3 times [2023-11-29 05:25:53,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:25:53,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733617035] [2023-11-29 05:25:53,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:25:53,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:25:53,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:25:57,182 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:25:57,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:25:57,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733617035] [2023-11-29 05:25:57,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733617035] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:25:57,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760709505] [2023-11-29 05:25:57,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:25:57,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:25:57,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:25:57,184 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:25:57,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 05:25:57,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 05:25:57,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:25:57,332 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-29 05:25:57,333 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:25:57,784 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:25:57,784 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:25:58,193 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:25:58,193 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 60 [2023-11-29 05:25:58,501 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:25:58,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760709505] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:25:58,501 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:25:58,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 9] total 28 [2023-11-29 05:25:58,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559765775] [2023-11-29 05:25:58,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:25:58,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-29 05:25:58,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:25:58,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-29 05:25:58,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2023-11-29 05:25:58,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2023-11-29 05:25:58,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 287 transitions, 3889 flow. Second operand has 29 states, 29 states have (on average 9.655172413793103) internal successors, (280), 29 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:25:58,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:25:58,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2023-11-29 05:25:58,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:26:06,631 INFO L124 PetriNetUnfolderBase]: 8061/14051 cut-off events. [2023-11-29 05:26:06,631 INFO L125 PetriNetUnfolderBase]: For 96596/96749 co-relation queries the response was YES. [2023-11-29 05:26:06,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71267 conditions, 14051 events. 8061/14051 cut-off events. For 96596/96749 co-relation queries the response was YES. Maximal size of possible extension queue 603. Compared 105556 event pairs, 1890 based on Foata normal form. 133/14073 useless extension candidates. Maximal degree in co-relation 71187. Up to 2161 conditions per place. [2023-11-29 05:26:06,778 INFO L140 encePairwiseOnDemand]: 25/37 looper letters, 319 selfloop transitions, 179 changer transitions 51/565 dead transitions. [2023-11-29 05:26:06,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 565 transitions, 6849 flow [2023-11-29 05:26:06,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-29 05:26:06,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-29 05:26:06,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 486 transitions. [2023-11-29 05:26:06,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45293569431500463 [2023-11-29 05:26:06,780 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 486 transitions. [2023-11-29 05:26:06,780 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 486 transitions. [2023-11-29 05:26:06,781 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:26:06,781 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 486 transitions. [2023-11-29 05:26:06,783 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 16.75862068965517) internal successors, (486), 29 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:06,785 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 37.0) internal successors, (1110), 30 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:06,786 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 37.0) internal successors, (1110), 30 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:06,786 INFO L175 Difference]: Start difference. First operand has 197 places, 287 transitions, 3889 flow. Second operand 29 states and 486 transitions. [2023-11-29 05:26:06,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 565 transitions, 6849 flow [2023-11-29 05:26:07,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 565 transitions, 6161 flow, removed 324 selfloop flow, removed 15 redundant places. [2023-11-29 05:26:07,681 INFO L231 Difference]: Finished difference. Result has 218 places, 326 transitions, 4450 flow [2023-11-29 05:26:07,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=3475, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=4450, PETRI_PLACES=218, PETRI_TRANSITIONS=326} [2023-11-29 05:26:07,682 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 178 predicate places. [2023-11-29 05:26:07,682 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 326 transitions, 4450 flow [2023-11-29 05:26:07,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 9.655172413793103) internal successors, (280), 29 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:07,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:26:07,682 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:26:07,687 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 05:26:07,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:26:07,883 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:26:07,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:26:07,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1433391911, now seen corresponding path program 4 times [2023-11-29 05:26:07,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:26:07,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120839373] [2023-11-29 05:26:07,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:26:07,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:26:07,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:26:10,474 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:26:10,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:26:10,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120839373] [2023-11-29 05:26:10,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120839373] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:26:10,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572019539] [2023-11-29 05:26:10,475 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 05:26:10,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:26:10,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:26:10,476 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:26:10,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 05:26:10,614 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 05:26:10,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:26:10,617 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-29 05:26:10,619 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:26:11,266 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:26:11,266 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:26:11,611 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:26:11,611 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 60 [2023-11-29 05:26:12,616 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:26:12,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572019539] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:26:12,616 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:26:12,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 37 [2023-11-29 05:26:12,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318313811] [2023-11-29 05:26:12,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:26:12,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-11-29 05:26:12,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:26:12,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-11-29 05:26:12,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1237, Unknown=0, NotChecked=0, Total=1406 [2023-11-29 05:26:12,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2023-11-29 05:26:12,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 326 transitions, 4450 flow. Second operand has 38 states, 38 states have (on average 9.368421052631579) internal successors, (356), 38 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:12,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:26:12,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2023-11-29 05:26:12,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:26:22,130 INFO L124 PetriNetUnfolderBase]: 9427/16325 cut-off events. [2023-11-29 05:26:22,130 INFO L125 PetriNetUnfolderBase]: For 110033/110190 co-relation queries the response was YES. [2023-11-29 05:26:22,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82863 conditions, 16325 events. 9427/16325 cut-off events. For 110033/110190 co-relation queries the response was YES. Maximal size of possible extension queue 684. Compared 124622 event pairs, 1806 based on Foata normal form. 137/16348 useless extension candidates. Maximal degree in co-relation 82780. Up to 2501 conditions per place. [2023-11-29 05:26:22,320 INFO L140 encePairwiseOnDemand]: 25/37 looper letters, 324 selfloop transitions, 258 changer transitions 62/660 dead transitions. [2023-11-29 05:26:22,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 660 transitions, 7887 flow [2023-11-29 05:26:22,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-11-29 05:26:22,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-11-29 05:26:22,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 631 transitions. [2023-11-29 05:26:22,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4487908961593172 [2023-11-29 05:26:22,323 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 631 transitions. [2023-11-29 05:26:22,323 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 631 transitions. [2023-11-29 05:26:22,324 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:26:22,324 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 631 transitions. [2023-11-29 05:26:22,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 16.605263157894736) internal successors, (631), 38 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:22,328 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 37.0) internal successors, (1443), 39 states have internal predecessors, (1443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:22,329 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 37.0) internal successors, (1443), 39 states have internal predecessors, (1443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:22,329 INFO L175 Difference]: Start difference. First operand has 218 places, 326 transitions, 4450 flow. Second operand 38 states and 631 transitions. [2023-11-29 05:26:22,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 660 transitions, 7887 flow [2023-11-29 05:26:23,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 660 transitions, 7650 flow, removed 25 selfloop flow, removed 15 redundant places. [2023-11-29 05:26:23,394 INFO L231 Difference]: Finished difference. Result has 246 places, 380 transitions, 5745 flow [2023-11-29 05:26:23,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=4260, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=211, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=5745, PETRI_PLACES=246, PETRI_TRANSITIONS=380} [2023-11-29 05:26:23,395 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 206 predicate places. [2023-11-29 05:26:23,395 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 380 transitions, 5745 flow [2023-11-29 05:26:23,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 9.368421052631579) internal successors, (356), 38 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:23,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:26:23,396 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:26:23,401 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 05:26:23,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-29 05:26:23,596 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:26:23,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:26:23,597 INFO L85 PathProgramCache]: Analyzing trace with hash -362321983, now seen corresponding path program 5 times [2023-11-29 05:26:23,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:26:23,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152304600] [2023-11-29 05:26:23,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:26:23,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:26:23,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:26:25,910 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:26:25,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:26:25,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152304600] [2023-11-29 05:26:25,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152304600] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:26:25,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971536140] [2023-11-29 05:26:25,911 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 05:26:25,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:26:25,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:26:25,912 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:26:25,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 05:26:26,065 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:26:26,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:26:26,067 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 05:26:26,069 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:26:26,408 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:26:26,408 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:26:26,717 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:26:26,717 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 62 [2023-11-29 05:26:27,030 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:26:27,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971536140] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:26:27,030 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:26:27,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 27 [2023-11-29 05:26:27,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423733310] [2023-11-29 05:26:27,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:26:27,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-29 05:26:27,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:26:27,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-29 05:26:27,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2023-11-29 05:26:27,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2023-11-29 05:26:27,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 380 transitions, 5745 flow. Second operand has 28 states, 28 states have (on average 9.75) internal successors, (273), 28 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:27,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:26:27,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2023-11-29 05:26:27,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:26:33,929 INFO L124 PetriNetUnfolderBase]: 9666/16746 cut-off events. [2023-11-29 05:26:33,929 INFO L125 PetriNetUnfolderBase]: For 137384/137572 co-relation queries the response was YES. [2023-11-29 05:26:34,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88179 conditions, 16746 events. 9666/16746 cut-off events. For 137384/137572 co-relation queries the response was YES. Maximal size of possible extension queue 709. Compared 128937 event pairs, 2137 based on Foata normal form. 174/16784 useless extension candidates. Maximal degree in co-relation 88090. Up to 2639 conditions per place. [2023-11-29 05:26:34,170 INFO L140 encePairwiseOnDemand]: 24/37 looper letters, 305 selfloop transitions, 228 changer transitions 43/592 dead transitions. [2023-11-29 05:26:34,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 592 transitions, 8060 flow [2023-11-29 05:26:34,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-29 05:26:34,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-29 05:26:34,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 433 transitions. [2023-11-29 05:26:34,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4681081081081081 [2023-11-29 05:26:34,173 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 433 transitions. [2023-11-29 05:26:34,173 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 433 transitions. [2023-11-29 05:26:34,173 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:26:34,173 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 433 transitions. [2023-11-29 05:26:34,174 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 17.32) internal successors, (433), 25 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:34,176 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 37.0) internal successors, (962), 26 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:34,176 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 37.0) internal successors, (962), 26 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:34,176 INFO L175 Difference]: Start difference. First operand has 246 places, 380 transitions, 5745 flow. Second operand 25 states and 433 transitions. [2023-11-29 05:26:34,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 592 transitions, 8060 flow [2023-11-29 05:26:35,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 592 transitions, 7364 flow, removed 127 selfloop flow, removed 23 redundant places. [2023-11-29 05:26:35,969 INFO L231 Difference]: Finished difference. Result has 252 places, 395 transitions, 5890 flow [2023-11-29 05:26:35,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=5102, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=214, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=5890, PETRI_PLACES=252, PETRI_TRANSITIONS=395} [2023-11-29 05:26:35,970 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 212 predicate places. [2023-11-29 05:26:35,970 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 395 transitions, 5890 flow [2023-11-29 05:26:35,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 9.75) internal successors, (273), 28 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:35,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:26:35,970 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:26:35,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-29 05:26:36,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-29 05:26:36,171 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:26:36,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:26:36,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1419577169, now seen corresponding path program 6 times [2023-11-29 05:26:36,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:26:36,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955767445] [2023-11-29 05:26:36,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:26:36,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:26:36,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:26:38,545 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:26:38,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:26:38,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955767445] [2023-11-29 05:26:38,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955767445] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:26:38,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784684902] [2023-11-29 05:26:38,546 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 05:26:38,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:26:38,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:26:38,547 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:26:38,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 05:26:38,724 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-29 05:26:38,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:26:38,726 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-29 05:26:38,728 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:26:39,024 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:26:39,025 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:26:39,183 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:26:39,183 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 60 [2023-11-29 05:26:39,721 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:26:39,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784684902] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:26:39,721 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:26:39,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 8] total 27 [2023-11-29 05:26:39,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410059388] [2023-11-29 05:26:39,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:26:39,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-29 05:26:39,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:26:39,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-29 05:26:39,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2023-11-29 05:26:39,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2023-11-29 05:26:39,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 395 transitions, 5890 flow. Second operand has 28 states, 28 states have (on average 9.785714285714286) internal successors, (274), 28 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:39,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:26:39,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2023-11-29 05:26:39,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:26:46,980 INFO L124 PetriNetUnfolderBase]: 9837/16986 cut-off events. [2023-11-29 05:26:46,980 INFO L125 PetriNetUnfolderBase]: For 139826/140014 co-relation queries the response was YES. [2023-11-29 05:26:47,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87452 conditions, 16986 events. 9837/16986 cut-off events. For 139826/140014 co-relation queries the response was YES. Maximal size of possible extension queue 726. Compared 130716 event pairs, 2865 based on Foata normal form. 174/17015 useless extension candidates. Maximal degree in co-relation 87359. Up to 3912 conditions per place. [2023-11-29 05:26:47,197 INFO L140 encePairwiseOnDemand]: 25/37 looper letters, 334 selfloop transitions, 220 changer transitions 51/621 dead transitions. [2023-11-29 05:26:47,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 621 transitions, 8306 flow [2023-11-29 05:26:47,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-29 05:26:47,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-29 05:26:47,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 502 transitions. [2023-11-29 05:26:47,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45225225225225224 [2023-11-29 05:26:47,200 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 502 transitions. [2023-11-29 05:26:47,200 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 502 transitions. [2023-11-29 05:26:47,200 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:26:47,200 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 502 transitions. [2023-11-29 05:26:47,201 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 16.733333333333334) internal successors, (502), 30 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:47,203 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 37.0) internal successors, (1147), 31 states have internal predecessors, (1147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:47,203 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 37.0) internal successors, (1147), 31 states have internal predecessors, (1147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:47,203 INFO L175 Difference]: Start difference. First operand has 252 places, 395 transitions, 5890 flow. Second operand 30 states and 502 transitions. [2023-11-29 05:26:47,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 621 transitions, 8306 flow [2023-11-29 05:26:48,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 621 transitions, 7970 flow, removed 28 selfloop flow, removed 13 redundant places. [2023-11-29 05:26:48,980 INFO L231 Difference]: Finished difference. Result has 270 places, 403 transitions, 6173 flow [2023-11-29 05:26:48,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=5570, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=213, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=6173, PETRI_PLACES=270, PETRI_TRANSITIONS=403} [2023-11-29 05:26:48,981 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 230 predicate places. [2023-11-29 05:26:48,981 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 403 transitions, 6173 flow [2023-11-29 05:26:48,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 9.785714285714286) internal successors, (274), 28 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:48,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:26:48,981 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:26:48,986 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 05:26:49,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-29 05:26:49,182 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:26:49,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:26:49,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1553755225, now seen corresponding path program 7 times [2023-11-29 05:26:49,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:26:49,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647130662] [2023-11-29 05:26:49,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:26:49,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:26:49,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:26:51,084 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:26:51,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:26:51,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647130662] [2023-11-29 05:26:51,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647130662] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:26:51,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693645968] [2023-11-29 05:26:51,085 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 05:26:51,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:26:51,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:26:51,087 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:26:51,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 05:26:51,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:26:51,238 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-29 05:26:51,240 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:26:51,899 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:26:51,900 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:26:52,574 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:26:52,574 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 62 [2023-11-29 05:26:54,335 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:26:54,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693645968] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:26:54,335 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:26:54,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 37 [2023-11-29 05:26:54,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457914336] [2023-11-29 05:26:54,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:26:54,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-11-29 05:26:54,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:26:54,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-11-29 05:26:54,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1226, Unknown=0, NotChecked=0, Total=1406 [2023-11-29 05:26:54,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2023-11-29 05:26:54,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 403 transitions, 6173 flow. Second operand has 38 states, 38 states have (on average 9.368421052631579) internal successors, (356), 38 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:54,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:26:54,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2023-11-29 05:26:54,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:27:05,308 INFO L124 PetriNetUnfolderBase]: 11717/20158 cut-off events. [2023-11-29 05:27:05,308 INFO L125 PetriNetUnfolderBase]: For 174295/174525 co-relation queries the response was YES. [2023-11-29 05:27:05,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103514 conditions, 20158 events. 11717/20158 cut-off events. For 174295/174525 co-relation queries the response was YES. Maximal size of possible extension queue 826. Compared 157517 event pairs, 3439 based on Foata normal form. 210/20192 useless extension candidates. Maximal degree in co-relation 103419. Up to 4814 conditions per place. [2023-11-29 05:27:05,765 INFO L140 encePairwiseOnDemand]: 24/37 looper letters, 393 selfloop transitions, 257 changer transitions 85/751 dead transitions. [2023-11-29 05:27:05,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 751 transitions, 9912 flow [2023-11-29 05:27:05,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-29 05:27:05,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-11-29 05:27:05,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 601 transitions. [2023-11-29 05:27:05,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4512012012012012 [2023-11-29 05:27:05,768 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 601 transitions. [2023-11-29 05:27:05,768 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 601 transitions. [2023-11-29 05:27:05,768 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:27:05,768 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 601 transitions. [2023-11-29 05:27:05,769 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 16.694444444444443) internal successors, (601), 36 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:05,772 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 37.0) internal successors, (1369), 37 states have internal predecessors, (1369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:05,773 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 37.0) internal successors, (1369), 37 states have internal predecessors, (1369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:05,773 INFO L175 Difference]: Start difference. First operand has 270 places, 403 transitions, 6173 flow. Second operand 36 states and 601 transitions. [2023-11-29 05:27:05,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 751 transitions, 9912 flow [2023-11-29 05:27:08,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 751 transitions, 9526 flow, removed 23 selfloop flow, removed 23 redundant places. [2023-11-29 05:27:08,189 INFO L231 Difference]: Finished difference. Result has 294 places, 462 transitions, 7398 flow [2023-11-29 05:27:08,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=5842, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=200, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=7398, PETRI_PLACES=294, PETRI_TRANSITIONS=462} [2023-11-29 05:27:08,190 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 254 predicate places. [2023-11-29 05:27:08,191 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 462 transitions, 7398 flow [2023-11-29 05:27:08,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 9.368421052631579) internal successors, (356), 38 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:08,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:27:08,191 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:27:08,196 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 05:27:08,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-29 05:27:08,392 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:27:08,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:27:08,392 INFO L85 PathProgramCache]: Analyzing trace with hash -445564043, now seen corresponding path program 8 times [2023-11-29 05:27:08,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:27:08,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033213674] [2023-11-29 05:27:08,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:27:08,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:27:08,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:27:11,546 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:27:11,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:27:11,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033213674] [2023-11-29 05:27:11,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033213674] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:27:11,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135449415] [2023-11-29 05:27:11,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:27:11,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:27:11,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:27:11,547 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:27:11,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 05:27:11,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:27:11,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:27:11,699 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-29 05:27:11,702 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:27:11,782 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-29 05:27:12,324 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:27:12,324 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:27:13,320 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 70 [2023-11-29 05:27:13,348 INFO L349 Elim1Store]: treesize reduction 5, result has 73.7 percent of original size [2023-11-29 05:27:13,348 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 163 treesize of output 124 [2023-11-29 05:27:13,513 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:27:13,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135449415] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:27:13,513 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:27:13,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 37 [2023-11-29 05:27:13,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612320954] [2023-11-29 05:27:13,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:27:13,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-11-29 05:27:13,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:27:13,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-11-29 05:27:13,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1234, Unknown=0, NotChecked=0, Total=1406 [2023-11-29 05:27:13,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2023-11-29 05:27:13,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 462 transitions, 7398 flow. Second operand has 38 states, 38 states have (on average 9.368421052631579) internal successors, (356), 38 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:13,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:27:13,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2023-11-29 05:27:13,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:27:27,831 INFO L124 PetriNetUnfolderBase]: 11886/20472 cut-off events. [2023-11-29 05:27:27,831 INFO L125 PetriNetUnfolderBase]: For 190842/191086 co-relation queries the response was YES. [2023-11-29 05:27:28,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106990 conditions, 20472 events. 11886/20472 cut-off events. For 190842/191086 co-relation queries the response was YES. Maximal size of possible extension queue 821. Compared 160753 event pairs, 4717 based on Foata normal form. 224/20524 useless extension candidates. Maximal degree in co-relation 106873. Up to 3900 conditions per place. [2023-11-29 05:27:28,161 INFO L140 encePairwiseOnDemand]: 25/37 looper letters, 548 selfloop transitions, 197 changer transitions 78/839 dead transitions. [2023-11-29 05:27:28,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 839 transitions, 11061 flow [2023-11-29 05:27:28,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-11-29 05:27:28,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-11-29 05:27:28,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 727 transitions. [2023-11-29 05:27:28,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43663663663663665 [2023-11-29 05:27:28,165 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 727 transitions. [2023-11-29 05:27:28,165 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 727 transitions. [2023-11-29 05:27:28,166 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:27:28,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 727 transitions. [2023-11-29 05:27:28,168 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 16.155555555555555) internal successors, (727), 45 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:28,171 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 37.0) internal successors, (1702), 46 states have internal predecessors, (1702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:28,172 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 37.0) internal successors, (1702), 46 states have internal predecessors, (1702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:28,172 INFO L175 Difference]: Start difference. First operand has 294 places, 462 transitions, 7398 flow. Second operand 45 states and 727 transitions. [2023-11-29 05:27:28,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 839 transitions, 11061 flow [2023-11-29 05:27:31,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 839 transitions, 10788 flow, removed 61 selfloop flow, removed 23 redundant places. [2023-11-29 05:27:31,136 INFO L231 Difference]: Finished difference. Result has 320 places, 472 transitions, 7797 flow [2023-11-29 05:27:31,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=7186, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=7797, PETRI_PLACES=320, PETRI_TRANSITIONS=472} [2023-11-29 05:27:31,137 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 280 predicate places. [2023-11-29 05:27:31,137 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 472 transitions, 7797 flow [2023-11-29 05:27:31,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 9.368421052631579) internal successors, (356), 38 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:31,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:27:31,138 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:27:31,142 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-29 05:27:31,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-29 05:27:31,338 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:27:31,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:27:31,338 INFO L85 PathProgramCache]: Analyzing trace with hash 69333595, now seen corresponding path program 9 times [2023-11-29 05:27:31,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:27:31,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860946154] [2023-11-29 05:27:31,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:27:31,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:27:31,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:27:34,812 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:27:34,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:27:34,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860946154] [2023-11-29 05:27:34,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860946154] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:27:34,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998471540] [2023-11-29 05:27:34,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:27:34,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:27:34,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:27:34,814 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:27:34,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 05:27:35,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 05:27:35,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:27:35,030 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-29 05:27:35,032 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:27:35,108 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-29 05:27:35,692 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:27:35,692 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:27:37,690 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 69 [2023-11-29 05:27:37,788 INFO L349 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-11-29 05:27:37,789 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 161 treesize of output 147 [2023-11-29 05:27:39,269 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:27:39,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998471540] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:27:39,269 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:27:39,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 37 [2023-11-29 05:27:39,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278774113] [2023-11-29 05:27:39,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:27:39,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-11-29 05:27:39,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:27:39,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-11-29 05:27:39,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1187, Unknown=0, NotChecked=0, Total=1406 [2023-11-29 05:27:39,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2023-11-29 05:27:39,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 472 transitions, 7797 flow. Second operand has 38 states, 38 states have (on average 9.368421052631579) internal successors, (356), 38 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:39,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:27:39,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2023-11-29 05:27:39,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:27:56,421 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 05:27:59,496 INFO L124 PetriNetUnfolderBase]: 12752/22000 cut-off events. [2023-11-29 05:27:59,496 INFO L125 PetriNetUnfolderBase]: For 225309/225557 co-relation queries the response was YES. [2023-11-29 05:27:59,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117876 conditions, 22000 events. 12752/22000 cut-off events. For 225309/225557 co-relation queries the response was YES. Maximal size of possible extension queue 887. Compared 175200 event pairs, 5457 based on Foata normal form. 228/22020 useless extension candidates. Maximal degree in co-relation 117750. Up to 11114 conditions per place. [2023-11-29 05:27:59,868 INFO L140 encePairwiseOnDemand]: 24/37 looper letters, 510 selfloop transitions, 145 changer transitions 49/720 dead transitions. [2023-11-29 05:27:59,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 720 transitions, 10869 flow [2023-11-29 05:27:59,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-29 05:27:59,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-29 05:27:59,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 484 transitions. [2023-11-29 05:27:59,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.451071761416589 [2023-11-29 05:27:59,870 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 484 transitions. [2023-11-29 05:27:59,870 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 484 transitions. [2023-11-29 05:27:59,871 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:27:59,871 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 484 transitions. [2023-11-29 05:27:59,872 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 16.689655172413794) internal successors, (484), 29 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:59,873 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 37.0) internal successors, (1110), 30 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:59,873 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 37.0) internal successors, (1110), 30 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:59,873 INFO L175 Difference]: Start difference. First operand has 320 places, 472 transitions, 7797 flow. Second operand 29 states and 484 transitions. [2023-11-29 05:27:59,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 720 transitions, 10869 flow [2023-11-29 05:28:03,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 720 transitions, 10560 flow, removed 32 selfloop flow, removed 27 redundant places. [2023-11-29 05:28:03,606 INFO L231 Difference]: Finished difference. Result has 325 places, 506 transitions, 8551 flow [2023-11-29 05:28:03,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=7541, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=8551, PETRI_PLACES=325, PETRI_TRANSITIONS=506} [2023-11-29 05:28:03,607 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 285 predicate places. [2023-11-29 05:28:03,607 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 506 transitions, 8551 flow [2023-11-29 05:28:03,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 9.368421052631579) internal successors, (356), 38 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:28:03,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:28:03,607 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:28:03,613 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 05:28:03,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-29 05:28:03,808 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:28:03,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:28:03,809 INFO L85 PathProgramCache]: Analyzing trace with hash -75448557, now seen corresponding path program 10 times [2023-11-29 05:28:03,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:28:03,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180499676] [2023-11-29 05:28:03,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:28:03,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:28:03,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:28:05,087 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:28:05,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:28:05,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180499676] [2023-11-29 05:28:05,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180499676] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:28:05,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600130993] [2023-11-29 05:28:05,087 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 05:28:05,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:28:05,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:28:05,089 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:28:05,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 05:28:05,224 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 05:28:05,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:28:05,226 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-29 05:28:05,228 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:28:05,796 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:28:05,796 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:28:06,169 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:28:06,170 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 60 [2023-11-29 05:28:07,681 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:28:07,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600130993] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:28:07,681 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:28:07,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 36 [2023-11-29 05:28:07,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361462053] [2023-11-29 05:28:07,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:28:07,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-29 05:28:07,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:28:07,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-29 05:28:07,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1162, Unknown=0, NotChecked=0, Total=1332 [2023-11-29 05:28:07,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2023-11-29 05:28:07,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 506 transitions, 8551 flow. Second operand has 37 states, 37 states have (on average 9.432432432432432) internal successors, (349), 37 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:28:07,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:28:07,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2023-11-29 05:28:07,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:28:18,126 INFO L124 PetriNetUnfolderBase]: 14353/24515 cut-off events. [2023-11-29 05:28:18,127 INFO L125 PetriNetUnfolderBase]: For 251029/251324 co-relation queries the response was YES. [2023-11-29 05:28:18,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134043 conditions, 24515 events. 14353/24515 cut-off events. For 251029/251324 co-relation queries the response was YES. Maximal size of possible extension queue 983. Compared 195563 event pairs, 4706 based on Foata normal form. 285/24596 useless extension candidates. Maximal degree in co-relation 133917. Up to 5809 conditions per place. [2023-11-29 05:28:18,598 INFO L140 encePairwiseOnDemand]: 25/37 looper letters, 443 selfloop transitions, 288 changer transitions 71/818 dead transitions. [2023-11-29 05:28:18,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 818 transitions, 12487 flow [2023-11-29 05:28:18,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-29 05:28:18,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-11-29 05:28:18,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 560 transitions. [2023-11-29 05:28:18,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4451510333863275 [2023-11-29 05:28:18,601 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 560 transitions. [2023-11-29 05:28:18,601 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 560 transitions. [2023-11-29 05:28:18,601 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:28:18,602 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 560 transitions. [2023-11-29 05:28:18,603 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 16.470588235294116) internal successors, (560), 34 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:28:18,605 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 37.0) internal successors, (1295), 35 states have internal predecessors, (1295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:28:18,606 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 37.0) internal successors, (1295), 35 states have internal predecessors, (1295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:28:18,606 INFO L175 Difference]: Start difference. First operand has 325 places, 506 transitions, 8551 flow. Second operand 34 states and 560 transitions. [2023-11-29 05:28:18,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 818 transitions, 12487 flow [2023-11-29 05:28:23,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 818 transitions, 12224 flow, removed 54 selfloop flow, removed 15 redundant places. [2023-11-29 05:28:23,496 INFO L231 Difference]: Finished difference. Result has 352 places, 562 transitions, 10087 flow [2023-11-29 05:28:23,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=8325, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=239, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=10087, PETRI_PLACES=352, PETRI_TRANSITIONS=562} [2023-11-29 05:28:23,497 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 312 predicate places. [2023-11-29 05:28:23,497 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 562 transitions, 10087 flow [2023-11-29 05:28:23,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 9.432432432432432) internal successors, (349), 37 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:28:23,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:28:23,497 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:28:23,504 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-29 05:28:23,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-29 05:28:23,698 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:28:23,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:28:23,698 INFO L85 PathProgramCache]: Analyzing trace with hash -2103259179, now seen corresponding path program 11 times [2023-11-29 05:28:23,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:28:23,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112515941] [2023-11-29 05:28:23,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:28:23,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:28:23,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:28:25,266 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:28:25,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:28:25,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112515941] [2023-11-29 05:28:25,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112515941] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:28:25,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414278614] [2023-11-29 05:28:25,267 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 05:28:25,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:28:25,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:28:25,268 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:28:25,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 05:28:25,403 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-29 05:28:25,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:28:25,405 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-29 05:28:25,406 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:28:25,715 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:28:25,715 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:28:25,881 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:28:25,881 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 60 [2023-11-29 05:28:26,207 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:28:26,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414278614] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:28:26,208 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:28:26,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 9] total 28 [2023-11-29 05:28:26,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717084950] [2023-11-29 05:28:26,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:28:26,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-29 05:28:26,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:28:26,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-29 05:28:26,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2023-11-29 05:28:26,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2023-11-29 05:28:26,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 562 transitions, 10087 flow. Second operand has 29 states, 29 states have (on average 9.793103448275861) internal successors, (284), 29 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:28:26,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:28:26,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2023-11-29 05:28:26,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:28:36,998 INFO L124 PetriNetUnfolderBase]: 16901/28772 cut-off events. [2023-11-29 05:28:36,998 INFO L125 PetriNetUnfolderBase]: For 345231/345578 co-relation queries the response was YES. [2023-11-29 05:28:37,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 163476 conditions, 28772 events. 16901/28772 cut-off events. For 345231/345578 co-relation queries the response was YES. Maximal size of possible extension queue 1139. Compared 233459 event pairs, 4567 based on Foata normal form. 336/28790 useless extension candidates. Maximal degree in co-relation 163343. Up to 4892 conditions per place. [2023-11-29 05:28:37,580 INFO L140 encePairwiseOnDemand]: 26/37 looper letters, 442 selfloop transitions, 366 changer transitions 44/868 dead transitions. [2023-11-29 05:28:37,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 868 transitions, 15063 flow [2023-11-29 05:28:37,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-29 05:28:37,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-29 05:28:37,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 456 transitions. [2023-11-29 05:28:37,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45645645645645644 [2023-11-29 05:28:37,582 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 456 transitions. [2023-11-29 05:28:37,582 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 456 transitions. [2023-11-29 05:28:37,583 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:28:37,583 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 456 transitions. [2023-11-29 05:28:37,583 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 16.88888888888889) internal successors, (456), 27 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:28:37,585 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 37.0) internal successors, (1036), 28 states have internal predecessors, (1036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:28:37,585 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 37.0) internal successors, (1036), 28 states have internal predecessors, (1036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:28:37,585 INFO L175 Difference]: Start difference. First operand has 352 places, 562 transitions, 10087 flow. Second operand 27 states and 456 transitions. [2023-11-29 05:28:37,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 868 transitions, 15063 flow [2023-11-29 05:28:44,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 868 transitions, 14422 flow, removed 182 selfloop flow, removed 18 redundant places. [2023-11-29 05:28:45,007 INFO L231 Difference]: Finished difference. Result has 365 places, 651 transitions, 12475 flow [2023-11-29 05:28:45,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=9578, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=562, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=283, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=12475, PETRI_PLACES=365, PETRI_TRANSITIONS=651} [2023-11-29 05:28:45,008 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 325 predicate places. [2023-11-29 05:28:45,008 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 651 transitions, 12475 flow [2023-11-29 05:28:45,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 9.793103448275861) internal successors, (284), 29 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:28:45,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:28:45,008 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:28:45,013 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-29 05:28:45,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-29 05:28:45,209 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:28:45,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:28:45,209 INFO L85 PathProgramCache]: Analyzing trace with hash 610107047, now seen corresponding path program 12 times [2023-11-29 05:28:45,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:28:45,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22947088] [2023-11-29 05:28:45,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:28:45,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:28:45,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:28:48,668 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:28:48,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:28:48,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22947088] [2023-11-29 05:28:48,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22947088] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:28:48,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537847055] [2023-11-29 05:28:48,669 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 05:28:48,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:28:48,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:28:48,670 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:28:48,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-29 05:28:48,818 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-29 05:28:48,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:28:48,820 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-29 05:28:48,822 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:28:48,899 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-29 05:28:49,675 INFO L349 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2023-11-29 05:28:49,675 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 68 treesize of output 38 [2023-11-29 05:28:49,722 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:28:49,722 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:28:51,627 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 69 [2023-11-29 05:28:51,731 INFO L349 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-11-29 05:28:51,732 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 161 treesize of output 147 [2023-11-29 05:28:53,508 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:28:53,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537847055] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:28:53,508 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:28:53,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 37 [2023-11-29 05:28:53,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929582797] [2023-11-29 05:28:53,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:28:53,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-11-29 05:28:53,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:28:53,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-11-29 05:28:53,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1213, Unknown=0, NotChecked=0, Total=1406 [2023-11-29 05:28:53,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2023-11-29 05:28:53,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 651 transitions, 12475 flow. Second operand has 38 states, 38 states have (on average 9.368421052631579) internal successors, (356), 38 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:28:53,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:28:53,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2023-11-29 05:28:53,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:29:09,936 INFO L124 PetriNetUnfolderBase]: 17368/29505 cut-off events. [2023-11-29 05:29:09,936 INFO L125 PetriNetUnfolderBase]: For 399415/399829 co-relation queries the response was YES. [2023-11-29 05:29:10,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 170141 conditions, 29505 events. 17368/29505 cut-off events. For 399415/399829 co-relation queries the response was YES. Maximal size of possible extension queue 1157. Compared 239669 event pairs, 8119 based on Foata normal form. 389/29595 useless extension candidates. Maximal degree in co-relation 169996. Up to 16018 conditions per place. [2023-11-29 05:29:10,623 INFO L140 encePairwiseOnDemand]: 25/37 looper letters, 625 selfloop transitions, 168 changer transitions 28/837 dead transitions. [2023-11-29 05:29:10,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 837 transitions, 15309 flow [2023-11-29 05:29:10,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-29 05:29:10,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-29 05:29:10,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 373 transitions. [2023-11-29 05:29:10,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4383078730904818 [2023-11-29 05:29:10,625 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 373 transitions. [2023-11-29 05:29:10,625 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 373 transitions. [2023-11-29 05:29:10,626 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:29:10,626 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 373 transitions. [2023-11-29 05:29:10,626 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 16.217391304347824) internal successors, (373), 23 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:29:10,628 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 37.0) internal successors, (888), 24 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:29:10,628 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 37.0) internal successors, (888), 24 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:29:10,628 INFO L175 Difference]: Start difference. First operand has 365 places, 651 transitions, 12475 flow. Second operand 23 states and 373 transitions. [2023-11-29 05:29:10,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 837 transitions, 15309 flow [2023-11-29 05:29:19,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 837 transitions, 14794 flow, removed 124 selfloop flow, removed 15 redundant places. [2023-11-29 05:29:19,985 INFO L231 Difference]: Finished difference. Result has 377 places, 669 transitions, 12818 flow [2023-11-29 05:29:19,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=11991, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=651, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=493, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=12818, PETRI_PLACES=377, PETRI_TRANSITIONS=669} [2023-11-29 05:29:19,986 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 337 predicate places. [2023-11-29 05:29:19,986 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 669 transitions, 12818 flow [2023-11-29 05:29:19,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 9.368421052631579) internal successors, (356), 38 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:29:19,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:29:19,987 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:29:19,992 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-11-29 05:29:20,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:29:20,187 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:29:20,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:29:20,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1055181147, now seen corresponding path program 13 times [2023-11-29 05:29:20,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:29:20,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413975770] [2023-11-29 05:29:20,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:29:20,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:29:20,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:29:21,506 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:29:21,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:29:21,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413975770] [2023-11-29 05:29:21,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413975770] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:29:21,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438978942] [2023-11-29 05:29:21,506 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 05:29:21,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:29:21,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:29:21,507 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:29:21,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-29 05:29:21,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:29:21,619 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-29 05:29:21,620 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:29:22,080 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:29:22,080 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:29:22,529 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:29:22,529 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 62 [2023-11-29 05:29:23,442 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:29:23,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438978942] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:29:23,442 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:29:23,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 37 [2023-11-29 05:29:23,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513863753] [2023-11-29 05:29:23,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:29:23,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-11-29 05:29:23,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:29:23,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-11-29 05:29:23,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1225, Unknown=0, NotChecked=0, Total=1406 [2023-11-29 05:29:23,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2023-11-29 05:29:23,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 669 transitions, 12818 flow. Second operand has 38 states, 38 states have (on average 9.368421052631579) internal successors, (356), 38 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:29:23,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:29:23,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2023-11-29 05:29:23,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:29:37,434 INFO L124 PetriNetUnfolderBase]: 19773/33359 cut-off events. [2023-11-29 05:29:37,434 INFO L125 PetriNetUnfolderBase]: For 463472/463929 co-relation queries the response was YES. [2023-11-29 05:29:37,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 190309 conditions, 33359 events. 19773/33359 cut-off events. For 463472/463929 co-relation queries the response was YES. Maximal size of possible extension queue 1299. Compared 273563 event pairs, 6811 based on Foata normal form. 447/33493 useless extension candidates. Maximal degree in co-relation 190166. Up to 9143 conditions per place. [2023-11-29 05:29:37,982 INFO L140 encePairwiseOnDemand]: 25/37 looper letters, 518 selfloop transitions, 413 changer transitions 86/1033 dead transitions. [2023-11-29 05:29:37,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 1033 transitions, 17923 flow [2023-11-29 05:29:37,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-29 05:29:37,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-11-29 05:29:37,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 584 transitions. [2023-11-29 05:29:37,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43843843843843844 [2023-11-29 05:29:37,984 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 584 transitions. [2023-11-29 05:29:37,984 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 584 transitions. [2023-11-29 05:29:37,985 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:29:37,985 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 584 transitions. [2023-11-29 05:29:37,986 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 16.22222222222222) internal successors, (584), 36 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:29:37,989 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 37.0) internal successors, (1369), 37 states have internal predecessors, (1369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:29:37,989 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 37.0) internal successors, (1369), 37 states have internal predecessors, (1369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:29:37,989 INFO L175 Difference]: Start difference. First operand has 377 places, 669 transitions, 12818 flow. Second operand 36 states and 584 transitions. [2023-11-29 05:29:37,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 1033 transitions, 17923 flow [2023-11-29 05:29:47,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 1033 transitions, 17741 flow, removed 13 selfloop flow, removed 11 redundant places. [2023-11-29 05:29:47,521 INFO L231 Difference]: Finished difference. Result has 417 places, 749 transitions, 15502 flow [2023-11-29 05:29:47,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=12672, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=669, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=334, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=15502, PETRI_PLACES=417, PETRI_TRANSITIONS=749} [2023-11-29 05:29:47,522 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 377 predicate places. [2023-11-29 05:29:47,522 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 749 transitions, 15502 flow [2023-11-29 05:29:47,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 9.368421052631579) internal successors, (356), 38 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:29:47,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:29:47,522 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:29:47,527 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-11-29 05:29:47,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-11-29 05:29:47,723 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:29:47,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:29:47,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1960467155, now seen corresponding path program 14 times [2023-11-29 05:29:47,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:29:47,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447440436] [2023-11-29 05:29:47,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:29:47,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:29:47,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:29:49,046 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:29:49,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:29:49,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447440436] [2023-11-29 05:29:49,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447440436] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:29:49,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106574279] [2023-11-29 05:29:49,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:29:49,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:29:49,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:29:49,047 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:29:49,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-29 05:29:49,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:29:49,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:29:49,174 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-29 05:29:49,176 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:29:49,238 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 05:29:49,843 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:29:49,844 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:29:51,207 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 70 [2023-11-29 05:29:51,252 INFO L349 Elim1Store]: treesize reduction 13, result has 64.9 percent of original size [2023-11-29 05:29:51,252 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 167 treesize of output 138 [2023-11-29 05:29:51,539 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:29:51,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106574279] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:29:51,539 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:29:51,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 37 [2023-11-29 05:29:51,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615953264] [2023-11-29 05:29:51,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:29:51,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-11-29 05:29:51,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:29:51,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-11-29 05:29:51,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1187, Unknown=0, NotChecked=0, Total=1406 [2023-11-29 05:29:51,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2023-11-29 05:29:51,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 749 transitions, 15502 flow. Second operand has 38 states, 38 states have (on average 9.368421052631579) internal successors, (356), 38 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:29:51,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:29:51,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2023-11-29 05:29:51,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:30:06,431 INFO L124 PetriNetUnfolderBase]: 19540/33023 cut-off events. [2023-11-29 05:30:06,431 INFO L125 PetriNetUnfolderBase]: For 533585/534071 co-relation queries the response was YES. [2023-11-29 05:30:06,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 195301 conditions, 33023 events. 19540/33023 cut-off events. For 533585/534071 co-relation queries the response was YES. Maximal size of possible extension queue 1289. Compared 271541 event pairs, 9270 based on Foata normal form. 461/33126 useless extension candidates. Maximal degree in co-relation 195128. Up to 18277 conditions per place. [2023-11-29 05:30:07,028 INFO L140 encePairwiseOnDemand]: 25/37 looper letters, 705 selfloop transitions, 169 changer transitions 28/918 dead transitions. [2023-11-29 05:30:07,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 918 transitions, 18109 flow [2023-11-29 05:30:07,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-29 05:30:07,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-29 05:30:07,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 365 transitions. [2023-11-29 05:30:07,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4484029484029484 [2023-11-29 05:30:07,030 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 365 transitions. [2023-11-29 05:30:07,030 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 365 transitions. [2023-11-29 05:30:07,031 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:30:07,031 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 365 transitions. [2023-11-29 05:30:07,032 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 16.59090909090909) internal successors, (365), 22 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:30:07,033 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 37.0) internal successors, (851), 23 states have internal predecessors, (851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:30:07,033 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 37.0) internal successors, (851), 23 states have internal predecessors, (851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:30:07,033 INFO L175 Difference]: Start difference. First operand has 417 places, 749 transitions, 15502 flow. Second operand 22 states and 365 transitions. [2023-11-29 05:30:07,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 918 transitions, 18109 flow [2023-11-29 05:30:18,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 918 transitions, 17821 flow, removed 61 selfloop flow, removed 22 redundant places. [2023-11-29 05:30:18,405 INFO L231 Difference]: Finished difference. Result has 412 places, 750 transitions, 15680 flow [2023-11-29 05:30:18,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=15272, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=749, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=580, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=15680, PETRI_PLACES=412, PETRI_TRANSITIONS=750} [2023-11-29 05:30:18,406 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 372 predicate places. [2023-11-29 05:30:18,406 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 750 transitions, 15680 flow [2023-11-29 05:30:18,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 9.368421052631579) internal successors, (356), 38 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:30:18,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:30:18,406 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:30:18,411 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-11-29 05:30:18,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:30:18,607 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:30:18,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:30:18,607 INFO L85 PathProgramCache]: Analyzing trace with hash 195528397, now seen corresponding path program 15 times [2023-11-29 05:30:18,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:30:18,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196784514] [2023-11-29 05:30:18,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:30:18,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:30:18,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:30:19,767 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:30:19,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:30:19,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196784514] [2023-11-29 05:30:19,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196784514] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:30:19,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821461625] [2023-11-29 05:30:19,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:30:19,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:30:19,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:30:19,769 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:30:19,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-29 05:30:19,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 05:30:19,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:30:19,967 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-29 05:30:19,969 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:30:20,026 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-29 05:30:20,400 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:30:20,400 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:30:21,930 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 72 [2023-11-29 05:30:21,982 INFO L349 Elim1Store]: treesize reduction 13, result has 64.9 percent of original size [2023-11-29 05:30:21,983 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 144 [2023-11-29 05:30:22,823 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:30:22,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821461625] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:30:22,823 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:30:22,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 37 [2023-11-29 05:30:22,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075273883] [2023-11-29 05:30:22,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:30:22,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-11-29 05:30:22,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:30:22,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-11-29 05:30:22,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=1177, Unknown=0, NotChecked=0, Total=1406 [2023-11-29 05:30:22,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2023-11-29 05:30:22,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 750 transitions, 15680 flow. Second operand has 38 states, 38 states have (on average 9.368421052631579) internal successors, (356), 38 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:30:22,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:30:22,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2023-11-29 05:30:22,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:30:40,354 INFO L124 PetriNetUnfolderBase]: 19929/33732 cut-off events. [2023-11-29 05:30:40,354 INFO L125 PetriNetUnfolderBase]: For 557188/557665 co-relation queries the response was YES. [2023-11-29 05:30:40,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 199230 conditions, 33732 events. 19929/33732 cut-off events. For 557188/557665 co-relation queries the response was YES. Maximal size of possible extension queue 1269. Compared 277956 event pairs, 8162 based on Foata normal form. 462/33857 useless extension candidates. Maximal degree in co-relation 199076. Up to 7005 conditions per place. [2023-11-29 05:30:41,018 INFO L140 encePairwiseOnDemand]: 25/37 looper letters, 711 selfloop transitions, 372 changer transitions 84/1183 dead transitions. [2023-11-29 05:30:41,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 1183 transitions, 20774 flow [2023-11-29 05:30:41,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-11-29 05:30:41,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2023-11-29 05:30:41,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 754 transitions. [2023-11-29 05:30:41,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4335825186889017 [2023-11-29 05:30:41,020 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 754 transitions. [2023-11-29 05:30:41,020 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 754 transitions. [2023-11-29 05:30:41,021 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:30:41,021 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 754 transitions. [2023-11-29 05:30:41,022 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 16.04255319148936) internal successors, (754), 47 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:30:41,024 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 37.0) internal successors, (1776), 48 states have internal predecessors, (1776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:30:41,025 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 37.0) internal successors, (1776), 48 states have internal predecessors, (1776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:30:41,025 INFO L175 Difference]: Start difference. First operand has 412 places, 750 transitions, 15680 flow. Second operand 47 states and 754 transitions. [2023-11-29 05:30:41,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 1183 transitions, 20774 flow [2023-11-29 05:30:51,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 1183 transitions, 20558 flow, removed 16 selfloop flow, removed 13 redundant places. [2023-11-29 05:30:51,457 INFO L231 Difference]: Finished difference. Result has 456 places, 785 transitions, 16976 flow [2023-11-29 05:30:51,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=15487, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=750, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=345, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=16976, PETRI_PLACES=456, PETRI_TRANSITIONS=785} [2023-11-29 05:30:51,458 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 416 predicate places. [2023-11-29 05:30:51,459 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 785 transitions, 16976 flow [2023-11-29 05:30:51,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 9.368421052631579) internal successors, (356), 38 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:30:51,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:30:51,459 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:30:51,464 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-11-29 05:30:51,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:30:51,659 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:30:51,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:30:51,660 INFO L85 PathProgramCache]: Analyzing trace with hash 972793697, now seen corresponding path program 16 times [2023-11-29 05:30:51,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:30:51,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337357607] [2023-11-29 05:30:51,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:30:51,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:30:51,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:30:54,293 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:30:54,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:30:54,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337357607] [2023-11-29 05:30:54,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337357607] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:30:54,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211864321] [2023-11-29 05:30:54,294 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 05:30:54,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:30:54,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:30:54,295 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:30:54,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-29 05:30:54,410 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 05:30:54,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:30:54,412 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-29 05:30:54,413 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:30:54,928 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:30:54,928 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:30:55,334 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:30:55,334 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 85 treesize of output 70 [2023-11-29 05:31:00,271 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:31:00,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211864321] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:31:00,271 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:31:00,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 36 [2023-11-29 05:31:00,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430649622] [2023-11-29 05:31:00,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:31:00,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-29 05:31:00,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:31:00,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-29 05:31:00,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1161, Unknown=0, NotChecked=0, Total=1332 [2023-11-29 05:31:00,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2023-11-29 05:31:00,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 785 transitions, 16976 flow. Second operand has 37 states, 37 states have (on average 9.432432432432432) internal successors, (349), 37 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:31:00,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:31:00,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2023-11-29 05:31:00,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:31:15,287 INFO L124 PetriNetUnfolderBase]: 20422/34613 cut-off events. [2023-11-29 05:31:15,287 INFO L125 PetriNetUnfolderBase]: For 614649/615110 co-relation queries the response was YES. [2023-11-29 05:31:15,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 208660 conditions, 34613 events. 20422/34613 cut-off events. For 614649/615110 co-relation queries the response was YES. Maximal size of possible extension queue 1319. Compared 286365 event pairs, 7166 based on Foata normal form. 452/34752 useless extension candidates. Maximal degree in co-relation 208481. Up to 9413 conditions per place. [2023-11-29 05:31:16,099 INFO L140 encePairwiseOnDemand]: 25/37 looper letters, 552 selfloop transitions, 424 changer transitions 72/1064 dead transitions. [2023-11-29 05:31:16,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 1064 transitions, 20763 flow [2023-11-29 05:31:16,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-29 05:31:16,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-11-29 05:31:16,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 574 transitions. [2023-11-29 05:31:16,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44324324324324327 [2023-11-29 05:31:16,101 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 574 transitions. [2023-11-29 05:31:16,101 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 574 transitions. [2023-11-29 05:31:16,101 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:31:16,101 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 574 transitions. [2023-11-29 05:31:16,102 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 16.4) internal successors, (574), 35 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:31:16,104 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 37.0) internal successors, (1332), 36 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:31:16,104 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 37.0) internal successors, (1332), 36 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:31:16,104 INFO L175 Difference]: Start difference. First operand has 456 places, 785 transitions, 16976 flow. Second operand 35 states and 574 transitions. [2023-11-29 05:31:16,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 1064 transitions, 20763 flow [2023-11-29 05:31:27,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 1064 transitions, 20442 flow, removed 54 selfloop flow, removed 25 redundant places. [2023-11-29 05:31:27,070 INFO L231 Difference]: Finished difference. Result has 467 places, 795 transitions, 17918 flow [2023-11-29 05:31:27,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=16687, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=785, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=414, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=17918, PETRI_PLACES=467, PETRI_TRANSITIONS=795} [2023-11-29 05:31:27,071 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 427 predicate places. [2023-11-29 05:31:27,071 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 795 transitions, 17918 flow [2023-11-29 05:31:27,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 9.432432432432432) internal successors, (349), 37 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:31:27,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:31:27,071 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:31:27,076 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-11-29 05:31:27,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:31:27,272 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:31:27,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:31:27,272 INFO L85 PathProgramCache]: Analyzing trace with hash 786039998, now seen corresponding path program 17 times [2023-11-29 05:31:27,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:31:27,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485011923] [2023-11-29 05:31:27,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:31:27,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:31:27,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:31:28,991 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:31:28,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:31:28,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485011923] [2023-11-29 05:31:28,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485011923] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:31:28,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393514243] [2023-11-29 05:31:28,992 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 05:31:28,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:31:28,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:31:28,993 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:31:28,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-29 05:31:29,119 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-29 05:31:29,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:31:29,120 INFO L262 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-29 05:31:29,122 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:31:29,406 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:31:29,406 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:31:29,560 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:31:29,561 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 60 [2023-11-29 05:31:29,841 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 05:31:29,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393514243] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:31:29,841 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:31:29,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 9] total 29 [2023-11-29 05:31:29,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481026340] [2023-11-29 05:31:29,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:31:29,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-29 05:31:29,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:31:29,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-29 05:31:29,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=779, Unknown=0, NotChecked=0, Total=870 [2023-11-29 05:31:29,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2023-11-29 05:31:29,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 795 transitions, 17918 flow. Second operand has 30 states, 30 states have (on average 9.733333333333333) internal successors, (292), 30 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) [2023-11-29 05:31:29,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:31:29,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2023-11-29 05:31:29,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:31:45,431 INFO L124 PetriNetUnfolderBase]: 24656/41853 cut-off events. [2023-11-29 05:31:45,431 INFO L125 PetriNetUnfolderBase]: For 857744/858264 co-relation queries the response was YES. [2023-11-29 05:31:46,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 255821 conditions, 41853 events. 24656/41853 cut-off events. For 857744/858264 co-relation queries the response was YES. Maximal size of possible extension queue 1606. Compared 356383 event pairs, 6101 based on Foata normal form. 511/41907 useless extension candidates. Maximal degree in co-relation 255647. Up to 9375 conditions per place. [2023-11-29 05:31:46,229 INFO L140 encePairwiseOnDemand]: 26/37 looper letters, 555 selfloop transitions, 561 changer transitions 48/1180 dead transitions. [2023-11-29 05:31:46,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 1180 transitions, 25446 flow [2023-11-29 05:31:46,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-29 05:31:46,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-11-29 05:31:46,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 463 transitions. [2023-11-29 05:31:46,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4469111969111969 [2023-11-29 05:31:46,231 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 463 transitions. [2023-11-29 05:31:46,231 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 463 transitions. [2023-11-29 05:31:46,232 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:31:46,232 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 463 transitions. [2023-11-29 05:31:46,232 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 16.535714285714285) internal successors, (463), 28 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:31:46,233 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 37.0) internal successors, (1073), 29 states have internal predecessors, (1073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:31:46,233 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 37.0) internal successors, (1073), 29 states have internal predecessors, (1073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:31:46,233 INFO L175 Difference]: Start difference. First operand has 467 places, 795 transitions, 17918 flow. Second operand 28 states and 463 transitions. [2023-11-29 05:31:46,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 1180 transitions, 25446 flow [2023-11-29 05:32:02,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 1180 transitions, 24807 flow, removed 46 selfloop flow, removed 25 redundant places. [2023-11-29 05:32:02,667 INFO L231 Difference]: Finished difference. Result has 469 places, 911 transitions, 21754 flow [2023-11-29 05:32:02,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=17380, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=795, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=446, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=21754, PETRI_PLACES=469, PETRI_TRANSITIONS=911} [2023-11-29 05:32:02,668 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 429 predicate places. [2023-11-29 05:32:02,668 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 911 transitions, 21754 flow [2023-11-29 05:32:02,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 9.733333333333333) internal successors, (292), 30 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) [2023-11-29 05:32:02,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:32:02,668 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:32:02,673 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-11-29 05:32:02,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:32:02,869 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:32:02,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:32:02,869 INFO L85 PathProgramCache]: Analyzing trace with hash 2051486232, now seen corresponding path program 18 times [2023-11-29 05:32:02,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:32:02,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128440142] [2023-11-29 05:32:02,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:32:02,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:32:02,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:32:06,583 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:32:06,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:32:06,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128440142] [2023-11-29 05:32:06,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128440142] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:32:06,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003145849] [2023-11-29 05:32:06,584 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 05:32:06,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:32:06,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:32:06,585 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:32:06,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-29 05:32:06,773 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-29 05:32:06,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:32:06,775 INFO L262 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-29 05:32:06,776 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:32:07,142 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:32:07,142 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 108 treesize of output 40 [2023-11-29 05:32:07,178 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:32:07,179 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:32:07,486 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:32:07,486 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 85 treesize of output 70 [2023-11-29 05:32:08,045 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 05:32:08,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003145849] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:32:08,045 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:32:08,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 9] total 29 [2023-11-29 05:32:08,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372337391] [2023-11-29 05:32:08,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:32:08,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-29 05:32:08,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:32:08,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-29 05:32:08,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=781, Unknown=0, NotChecked=0, Total=870 [2023-11-29 05:32:08,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2023-11-29 05:32:08,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 911 transitions, 21754 flow. Second operand has 30 states, 30 states have (on average 9.633333333333333) internal successors, (289), 30 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:32:08,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:32:08,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2023-11-29 05:32:08,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:32:25,463 INFO L124 PetriNetUnfolderBase]: 25433/43462 cut-off events. [2023-11-29 05:32:25,463 INFO L125 PetriNetUnfolderBase]: For 909618/910162 co-relation queries the response was YES. [2023-11-29 05:32:26,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 267600 conditions, 43462 events. 25433/43462 cut-off events. For 909618/910162 co-relation queries the response was YES. Maximal size of possible extension queue 1708. Compared 376596 event pairs, 7859 based on Foata normal form. 532/43496 useless extension candidates. Maximal degree in co-relation 267425. Up to 8644 conditions per place. [2023-11-29 05:32:26,388 INFO L140 encePairwiseOnDemand]: 26/37 looper letters, 587 selfloop transitions, 497 changer transitions 24/1124 dead transitions. [2023-11-29 05:32:26,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 484 places, 1124 transitions, 25869 flow [2023-11-29 05:32:26,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-29 05:32:26,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-29 05:32:26,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 323 transitions. [2023-11-29 05:32:26,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43648648648648647 [2023-11-29 05:32:26,389 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 323 transitions. [2023-11-29 05:32:26,390 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 323 transitions. [2023-11-29 05:32:26,390 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:32:26,390 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 323 transitions. [2023-11-29 05:32:26,390 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 16.15) internal successors, (323), 20 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:32:26,392 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 37.0) internal successors, (777), 21 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:32:26,392 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 37.0) internal successors, (777), 21 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:32:26,392 INFO L175 Difference]: Start difference. First operand has 469 places, 911 transitions, 21754 flow. Second operand 20 states and 323 transitions. [2023-11-29 05:32:26,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 484 places, 1124 transitions, 25869 flow [2023-11-29 05:32:46,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 476 places, 1124 transitions, 25800 flow, removed 23 selfloop flow, removed 8 redundant places. [2023-11-29 05:32:46,625 INFO L231 Difference]: Finished difference. Result has 480 places, 924 transitions, 23191 flow [2023-11-29 05:32:46,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=21689, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=911, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=486, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=23191, PETRI_PLACES=480, PETRI_TRANSITIONS=924} [2023-11-29 05:32:46,626 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 440 predicate places. [2023-11-29 05:32:46,626 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 924 transitions, 23191 flow [2023-11-29 05:32:46,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 9.633333333333333) internal successors, (289), 30 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:32:46,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:32:46,626 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:32:46,631 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-11-29 05:32:46,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:32:46,827 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:32:46,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:32:46,827 INFO L85 PathProgramCache]: Analyzing trace with hash 894548174, now seen corresponding path program 19 times [2023-11-29 05:32:46,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:32:46,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187189951] [2023-11-29 05:32:46,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:32:46,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:32:46,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:32:48,953 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:32:48,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:32:48,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187189951] [2023-11-29 05:32:48,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187189951] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:32:48,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052839879] [2023-11-29 05:32:48,953 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 05:32:48,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:32:48,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:32:48,954 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:32:48,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-29 05:32:49,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:32:49,078 INFO L262 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 05:32:49,080 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:32:49,362 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:32:49,362 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 108 treesize of output 40 [2023-11-29 05:32:49,394 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 05:32:49,395 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:32:49,733 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:32:49,733 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 83 treesize of output 68 [2023-11-29 05:32:50,406 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 05:32:50,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052839879] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:32:50,406 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:32:50,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 9] total 27 [2023-11-29 05:32:50,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410525562] [2023-11-29 05:32:50,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:32:50,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-29 05:32:50,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:32:50,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-29 05:32:50,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2023-11-29 05:32:50,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2023-11-29 05:32:50,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 924 transitions, 23191 flow. Second operand has 28 states, 28 states have (on average 9.714285714285714) internal successors, (272), 28 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) [2023-11-29 05:32:50,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:32:50,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2023-11-29 05:32:50,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:33:09,018 INFO L124 PetriNetUnfolderBase]: 26111/44748 cut-off events. [2023-11-29 05:33:09,018 INFO L125 PetriNetUnfolderBase]: For 1041473/1042017 co-relation queries the response was YES. [2023-11-29 05:33:09,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 279746 conditions, 44748 events. 26111/44748 cut-off events. For 1041473/1042017 co-relation queries the response was YES. Maximal size of possible extension queue 1744. Compared 390477 event pairs, 7928 based on Foata normal form. 532/44782 useless extension candidates. Maximal degree in co-relation 279577. Up to 6920 conditions per place. [2023-11-29 05:33:09,863 INFO L140 encePairwiseOnDemand]: 26/37 looper letters, 638 selfloop transitions, 498 changer transitions 24/1176 dead transitions. [2023-11-29 05:33:09,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 499 places, 1176 transitions, 27804 flow [2023-11-29 05:33:09,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-29 05:33:09,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-29 05:33:09,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 345 transitions. [2023-11-29 05:33:09,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4238329238329238 [2023-11-29 05:33:09,864 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 345 transitions. [2023-11-29 05:33:09,864 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 345 transitions. [2023-11-29 05:33:09,865 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:33:09,865 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 345 transitions. [2023-11-29 05:33:09,865 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 15.681818181818182) internal successors, (345), 22 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:33:09,866 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 37.0) internal successors, (851), 23 states have internal predecessors, (851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:33:09,866 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 37.0) internal successors, (851), 23 states have internal predecessors, (851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:33:09,866 INFO L175 Difference]: Start difference. First operand has 480 places, 924 transitions, 23191 flow. Second operand 22 states and 345 transitions. [2023-11-29 05:33:09,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 499 places, 1176 transitions, 27804 flow [2023-11-29 05:33:31,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 489 places, 1176 transitions, 27395 flow, removed 28 selfloop flow, removed 10 redundant places. [2023-11-29 05:33:32,000 INFO L231 Difference]: Finished difference. Result has 495 places, 938 transitions, 24245 flow [2023-11-29 05:33:32,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=22784, PETRI_DIFFERENCE_MINUEND_PLACES=468, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=924, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=488, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=24245, PETRI_PLACES=495, PETRI_TRANSITIONS=938} [2023-11-29 05:33:32,001 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 455 predicate places. [2023-11-29 05:33:32,001 INFO L495 AbstractCegarLoop]: Abstraction has has 495 places, 938 transitions, 24245 flow [2023-11-29 05:33:32,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 9.714285714285714) internal successors, (272), 28 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) [2023-11-29 05:33:32,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:33:32,002 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:33:32,007 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-11-29 05:33:32,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-11-29 05:33:32,202 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:33:32,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:33:32,203 INFO L85 PathProgramCache]: Analyzing trace with hash 65074491, now seen corresponding path program 20 times [2023-11-29 05:33:32,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:33:32,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26232218] [2023-11-29 05:33:32,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:33:32,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:33:32,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:33:32,327 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:33:32,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:33:32,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26232218] [2023-11-29 05:33:32,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26232218] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:33:32,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381311443] [2023-11-29 05:33:32,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:33:32,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:33:32,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:33:32,328 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:33:32,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-29 05:33:32,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:33:32,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:33:32,483 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 05:33:32,484 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:33:32,534 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:33:32,534 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:33:32,608 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:33:32,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381311443] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:33:32,608 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:33:32,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-29 05:33:32,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586813374] [2023-11-29 05:33:32,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:33:32,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 05:33:32,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:33:32,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 05:33:32,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2023-11-29 05:33:32,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2023-11-29 05:33:32,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 495 places, 938 transitions, 24245 flow. Second operand has 15 states, 15 states have (on average 10.266666666666667) internal successors, (154), 15 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:33:32,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:33:32,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2023-11-29 05:33:32,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:34:00,400 INFO L124 PetriNetUnfolderBase]: 44097/72727 cut-off events. [2023-11-29 05:34:00,401 INFO L125 PetriNetUnfolderBase]: For 1622780/1624188 co-relation queries the response was YES. [2023-11-29 05:34:01,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 430834 conditions, 72727 events. 44097/72727 cut-off events. For 1622780/1624188 co-relation queries the response was YES. Maximal size of possible extension queue 2485. Compared 635806 event pairs, 13180 based on Foata normal form. 2256/74559 useless extension candidates. Maximal degree in co-relation 430660. Up to 32778 conditions per place. [2023-11-29 05:34:02,283 INFO L140 encePairwiseOnDemand]: 29/37 looper letters, 1035 selfloop transitions, 148 changer transitions 0/1586 dead transitions. [2023-11-29 05:34:02,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 530 places, 1586 transitions, 43526 flow [2023-11-29 05:34:02,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-11-29 05:34:02,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-11-29 05:34:02,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 581 transitions. [2023-11-29 05:34:02,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4132290184921764 [2023-11-29 05:34:02,286 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 581 transitions. [2023-11-29 05:34:02,286 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 581 transitions. [2023-11-29 05:34:02,286 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:34:02,286 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 581 transitions. [2023-11-29 05:34:02,287 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 15.289473684210526) internal successors, (581), 38 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:34:02,289 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 37.0) internal successors, (1443), 39 states have internal predecessors, (1443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:34:02,290 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 37.0) internal successors, (1443), 39 states have internal predecessors, (1443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:34:02,290 INFO L175 Difference]: Start difference. First operand has 495 places, 938 transitions, 24245 flow. Second operand 38 states and 581 transitions. [2023-11-29 05:34:02,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 530 places, 1586 transitions, 43526 flow [2023-11-29 05:35:00,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 518 places, 1586 transitions, 42523 flow, removed 30 selfloop flow, removed 12 redundant places. [2023-11-29 05:35:00,234 INFO L231 Difference]: Finished difference. Result has 525 places, 1040 transitions, 24922 flow [2023-11-29 05:35:00,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=23642, PETRI_DIFFERENCE_MINUEND_PLACES=481, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=938, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=868, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=24922, PETRI_PLACES=525, PETRI_TRANSITIONS=1040} [2023-11-29 05:35:00,235 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 485 predicate places. [2023-11-29 05:35:00,235 INFO L495 AbstractCegarLoop]: Abstraction has has 525 places, 1040 transitions, 24922 flow [2023-11-29 05:35:00,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 10.266666666666667) internal successors, (154), 15 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:35:00,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:35:00,235 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:35:00,239 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-11-29 05:35:00,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-11-29 05:35:00,436 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:35:00,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:35:00,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1508874814, now seen corresponding path program 21 times [2023-11-29 05:35:00,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:35:00,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6605593] [2023-11-29 05:35:00,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:35:00,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:35:00,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:35:00,542 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:35:00,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:35:00,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6605593] [2023-11-29 05:35:00,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6605593] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:35:00,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013093848] [2023-11-29 05:35:00,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:35:00,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:35:00,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:35:00,543 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:35:00,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-29 05:35:00,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 05:35:00,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:35:00,736 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 05:35:00,737 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:35:00,798 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:35:00,798 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:35:00,861 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:35:00,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013093848] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:35:00,861 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:35:00,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-11-29 05:35:00,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416247549] [2023-11-29 05:35:00,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:35:00,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 05:35:00,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:35:00,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 05:35:00,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-11-29 05:35:00,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2023-11-29 05:35:00,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 525 places, 1040 transitions, 24922 flow. Second operand has 12 states, 12 states have (on average 11.083333333333334) internal successors, (133), 12 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:35:00,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:35:00,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2023-11-29 05:35:00,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:35:35,282 INFO L124 PetriNetUnfolderBase]: 53518/88443 cut-off events. [2023-11-29 05:35:35,282 INFO L125 PetriNetUnfolderBase]: For 1873642/1875718 co-relation queries the response was YES. [2023-11-29 05:35:36,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 569671 conditions, 88443 events. 53518/88443 cut-off events. For 1873642/1875718 co-relation queries the response was YES. Maximal size of possible extension queue 2743. Compared 785633 event pairs, 3306 based on Foata normal form. 1094/89181 useless extension candidates. Maximal degree in co-relation 568832. Up to 18569 conditions per place. [2023-11-29 05:35:37,455 INFO L140 encePairwiseOnDemand]: 29/37 looper letters, 1179 selfloop transitions, 265 changer transitions 59/1906 dead transitions. [2023-11-29 05:35:37,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 547 places, 1906 transitions, 54061 flow [2023-11-29 05:35:37,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-29 05:35:37,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-29 05:35:37,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 377 transitions. [2023-11-29 05:35:37,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44300822561692127 [2023-11-29 05:35:37,456 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 377 transitions. [2023-11-29 05:35:37,456 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 377 transitions. [2023-11-29 05:35:37,456 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:35:37,456 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 377 transitions. [2023-11-29 05:35:37,457 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 16.391304347826086) internal successors, (377), 23 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:35:37,458 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 37.0) internal successors, (888), 24 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:35:37,458 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 37.0) internal successors, (888), 24 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:35:37,458 INFO L175 Difference]: Start difference. First operand has 525 places, 1040 transitions, 24922 flow. Second operand 23 states and 377 transitions. [2023-11-29 05:35:37,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 547 places, 1906 transitions, 54061 flow [2023-11-29 05:37:18,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 542 places, 1906 transitions, 53455 flow, removed 214 selfloop flow, removed 5 redundant places. [2023-11-29 05:37:18,614 INFO L231 Difference]: Finished difference. Result has 550 places, 1174 transitions, 27051 flow [2023-11-29 05:37:18,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=24417, PETRI_DIFFERENCE_MINUEND_PLACES=520, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1038, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=888, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=27051, PETRI_PLACES=550, PETRI_TRANSITIONS=1174} [2023-11-29 05:37:18,615 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 510 predicate places. [2023-11-29 05:37:18,615 INFO L495 AbstractCegarLoop]: Abstraction has has 550 places, 1174 transitions, 27051 flow [2023-11-29 05:37:18,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.083333333333334) internal successors, (133), 12 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:37:18,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:37:18,616 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:37:18,620 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-11-29 05:37:18,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-11-29 05:37:18,816 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:37:18,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:37:18,817 INFO L85 PathProgramCache]: Analyzing trace with hash 682859594, now seen corresponding path program 22 times [2023-11-29 05:37:18,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:37:18,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71094500] [2023-11-29 05:37:18,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:37:18,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:37:18,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:37:18,952 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:37:18,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:37:18,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71094500] [2023-11-29 05:37:18,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71094500] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:37:18,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634795508] [2023-11-29 05:37:18,953 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 05:37:18,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:37:18,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:37:18,954 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:37:18,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_055909f6-a70f-4d37-a08f-3e86b2c30d37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-11-29 05:37:19,082 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 05:37:19,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:37:19,084 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 05:37:19,084 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:37:19,142 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:37:19,142 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:37:19,211 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:37:19,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634795508] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:37:19,212 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:37:19,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-29 05:37:19,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992276308] [2023-11-29 05:37:19,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:37:19,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 05:37:19,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:37:19,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 05:37:19,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2023-11-29 05:37:19,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2023-11-29 05:37:19,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 550 places, 1174 transitions, 27051 flow. Second operand has 15 states, 15 states have (on average 10.066666666666666) internal successors, (151), 15 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:37:19,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:37:19,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2023-11-29 05:37:19,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand