./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-prod-cons.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b 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_f6674afb-13b9-4918-a968-cb72f00397eb/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6674afb-13b9-4918-a968-cb72f00397eb/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6674afb-13b9-4918-a968-cb72f00397eb/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6674afb-13b9-4918-a968-cb72f00397eb/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-prod-cons.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6674afb-13b9-4918-a968-cb72f00397eb/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6674afb-13b9-4918-a968-cb72f00397eb/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --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 f9b434f3343269d91303305376bff127738dc22172486554888e346753333fd7 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 23:03:21,385 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 23:03:21,470 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6674afb-13b9-4918-a968-cb72f00397eb/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 23:03:21,476 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 23:03:21,477 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 23:03:21,505 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 23:03:21,506 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 23:03:21,506 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 23:03:21,507 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 23:03:21,508 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 23:03:21,509 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 23:03:21,510 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 23:03:21,510 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 23:03:21,511 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 23:03:21,512 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 23:03:21,512 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 23:03:21,513 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 23:03:21,514 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 23:03:21,514 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 23:03:21,515 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 23:03:21,516 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 23:03:21,516 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 23:03:21,517 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 23:03:21,518 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 23:03:21,518 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 23:03:21,519 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 23:03:21,519 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 23:03:21,520 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 23:03:21,521 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:03:21,521 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 23:03:21,522 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 23:03:21,522 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 23:03:21,523 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 23:03:21,523 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 23:03:21,523 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 23:03:21,524 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 23:03:21,524 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 23:03:21,524 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 23:03:21,525 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 23:03:21,525 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_f6674afb-13b9-4918-a968-cb72f00397eb/bin/uautomizer-verify-WvqO1wxjHP/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6674afb-13b9-4918-a968-cb72f00397eb/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f9b434f3343269d91303305376bff127738dc22172486554888e346753333fd7 [2023-11-06 23:03:21,821 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 23:03:21,851 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 23:03:21,853 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 23:03:21,855 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 23:03:21,857 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 23:03:21,858 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6674afb-13b9-4918-a968-cb72f00397eb/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/popl20-prod-cons.wvr.c [2023-11-06 23:03:24,949 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 23:03:25,190 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 23:03:25,191 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6674afb-13b9-4918-a968-cb72f00397eb/sv-benchmarks/c/weaver/popl20-prod-cons.wvr.c [2023-11-06 23:03:25,201 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6674afb-13b9-4918-a968-cb72f00397eb/bin/uautomizer-verify-WvqO1wxjHP/data/fc58a32ea/8a21ef4f288143a7ab2d8016a99c4fcf/FLAGf678c4f4f [2023-11-06 23:03:25,218 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6674afb-13b9-4918-a968-cb72f00397eb/bin/uautomizer-verify-WvqO1wxjHP/data/fc58a32ea/8a21ef4f288143a7ab2d8016a99c4fcf [2023-11-06 23:03:25,221 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 23:03:25,223 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 23:03:25,225 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 23:03:25,225 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 23:03:25,232 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 23:03:25,233 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:03:25" (1/1) ... [2023-11-06 23:03:25,234 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d39463e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:25, skipping insertion in model container [2023-11-06 23:03:25,234 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:03:25" (1/1) ... [2023-11-06 23:03:25,265 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 23:03:25,473 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_f6674afb-13b9-4918-a968-cb72f00397eb/sv-benchmarks/c/weaver/popl20-prod-cons.wvr.c[3056,3069] [2023-11-06 23:03:25,487 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:03:25,504 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 23:03:25,544 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_f6674afb-13b9-4918-a968-cb72f00397eb/sv-benchmarks/c/weaver/popl20-prod-cons.wvr.c[3056,3069] [2023-11-06 23:03:25,549 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:03:25,563 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 23:03:25,563 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 23:03:25,570 INFO L206 MainTranslator]: Completed translation [2023-11-06 23:03:25,571 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:25 WrapperNode [2023-11-06 23:03:25,571 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 23:03:25,572 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 23:03:25,573 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 23:03:25,573 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 23:03:25,583 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:25" (1/1) ... [2023-11-06 23:03:25,594 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:25" (1/1) ... [2023-11-06 23:03:25,639 INFO L138 Inliner]: procedures = 25, calls = 50, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 171 [2023-11-06 23:03:25,640 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 23:03:25,641 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 23:03:25,641 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 23:03:25,641 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 23:03:25,652 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:25" (1/1) ... [2023-11-06 23:03:25,653 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:25" (1/1) ... [2023-11-06 23:03:25,656 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:25" (1/1) ... [2023-11-06 23:03:25,657 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:25" (1/1) ... [2023-11-06 23:03:25,666 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:25" (1/1) ... [2023-11-06 23:03:25,671 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:25" (1/1) ... [2023-11-06 23:03:25,674 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:25" (1/1) ... [2023-11-06 23:03:25,676 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:25" (1/1) ... [2023-11-06 23:03:25,680 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 23:03:25,681 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 23:03:25,681 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 23:03:25,681 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 23:03:25,682 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:25" (1/1) ... [2023-11-06 23:03:25,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:03:25,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6674afb-13b9-4918-a968-cb72f00397eb/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:03:25,733 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6674afb-13b9-4918-a968-cb72f00397eb/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 23:03:25,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6674afb-13b9-4918-a968-cb72f00397eb/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 23:03:25,780 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 23:03:25,780 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 23:03:25,780 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 23:03:25,781 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 23:03:25,781 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-06 23:03:25,781 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-06 23:03:25,781 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-06 23:03:25,782 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-06 23:03:25,782 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-06 23:03:25,782 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-06 23:03:25,782 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 23:03:25,783 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-06 23:03:25,783 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-06 23:03:25,783 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 23:03:25,783 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 23:03:25,784 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 23:03:25,784 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 23:03:25,786 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-06 23:03:25,923 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 23:03:25,926 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 23:03:26,389 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 23:03:26,523 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 23:03:26,523 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-06 23:03:26,526 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:03:26 BoogieIcfgContainer [2023-11-06 23:03:26,526 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 23:03:26,529 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 23:03:26,529 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 23:03:26,533 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 23:03:26,534 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 11:03:25" (1/3) ... [2023-11-06 23:03:26,535 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a76ce3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:03:26, skipping insertion in model container [2023-11-06 23:03:26,535 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:25" (2/3) ... [2023-11-06 23:03:26,535 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a76ce3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:03:26, skipping insertion in model container [2023-11-06 23:03:26,535 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:03:26" (3/3) ... [2023-11-06 23:03:26,537 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-prod-cons.wvr.c [2023-11-06 23:03:26,547 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-06 23:03:26,560 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 23:03:26,560 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 23:03:26,560 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 23:03:26,678 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-06 23:03:26,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 157 places, 158 transitions, 337 flow [2023-11-06 23:03:26,899 INFO L124 PetriNetUnfolderBase]: 11/155 cut-off events. [2023-11-06 23:03:26,900 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 23:03:26,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168 conditions, 155 events. 11/155 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 88 event pairs, 0 based on Foata normal form. 0/143 useless extension candidates. Maximal degree in co-relation 124. Up to 3 conditions per place. [2023-11-06 23:03:26,908 INFO L82 GeneralOperation]: Start removeDead. Operand has 157 places, 158 transitions, 337 flow [2023-11-06 23:03:26,923 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 143 places, 144 transitions, 306 flow [2023-11-06 23:03:26,928 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 23:03:26,942 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 143 places, 144 transitions, 306 flow [2023-11-06 23:03:26,945 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 143 places, 144 transitions, 306 flow [2023-11-06 23:03:26,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 143 places, 144 transitions, 306 flow [2023-11-06 23:03:26,986 INFO L124 PetriNetUnfolderBase]: 11/144 cut-off events. [2023-11-06 23:03:26,987 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 23:03:26,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157 conditions, 144 events. 11/144 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 87 event pairs, 0 based on Foata normal form. 0/133 useless extension candidates. Maximal degree in co-relation 124. Up to 3 conditions per place. [2023-11-06 23:03:26,991 INFO L119 LiptonReduction]: Number of co-enabled transitions 1138 [2023-11-06 23:03:34,536 INFO L134 LiptonReduction]: Checked pairs total: 2146 [2023-11-06 23:03:34,537 INFO L136 LiptonReduction]: Total number of compositions: 144 [2023-11-06 23:03:34,555 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 23:03:34,564 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=LoopsAndPotentialCycles, 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;@c33ca82, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 23:03:34,564 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-06 23:03:34,573 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 23:03:34,573 INFO L124 PetriNetUnfolderBase]: 3/24 cut-off events. [2023-11-06 23:03:34,573 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 23:03:34,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:03:34,575 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:03:34,575 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)] === [2023-11-06 23:03:34,581 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:34,582 INFO L85 PathProgramCache]: Analyzing trace with hash 842108288, now seen corresponding path program 1 times [2023-11-06 23:03:34,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:34,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853047961] [2023-11-06 23:03:34,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:34,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:34,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:35,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:03:35,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:35,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853047961] [2023-11-06 23:03:35,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853047961] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:03:35,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:03:35,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:03:35,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984367232] [2023-11-06 23:03:35,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:03:35,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:03:35,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:35,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:03:35,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:03:35,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 302 [2023-11-06 23:03:35,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 25 transitions, 68 flow. Second operand has 4 states, 4 states have (on average 140.5) internal successors, (562), 4 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:35,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:03:35,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 302 [2023-11-06 23:03:35,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:03:35,433 INFO L124 PetriNetUnfolderBase]: 238/394 cut-off events. [2023-11-06 23:03:35,433 INFO L125 PetriNetUnfolderBase]: For 37/37 co-relation queries the response was YES. [2023-11-06 23:03:35,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 809 conditions, 394 events. 238/394 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1541 event pairs, 14 based on Foata normal form. 0/331 useless extension candidates. Maximal degree in co-relation 687. Up to 129 conditions per place. [2023-11-06 23:03:35,446 INFO L140 encePairwiseOnDemand]: 297/302 looper letters, 44 selfloop transitions, 5 changer transitions 0/51 dead transitions. [2023-11-06 23:03:35,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 51 transitions, 230 flow [2023-11-06 23:03:35,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 23:03:35,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 23:03:35,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 731 transitions. [2023-11-06 23:03:35,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48410596026490066 [2023-11-06 23:03:35,500 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 731 transitions. [2023-11-06 23:03:35,500 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 731 transitions. [2023-11-06 23:03:35,506 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:03:35,509 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 731 transitions. [2023-11-06 23:03:35,516 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 146.2) internal successors, (731), 5 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:35,527 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 302.0) internal successors, (1812), 6 states have internal predecessors, (1812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:35,529 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 302.0) internal successors, (1812), 6 states have internal predecessors, (1812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:35,531 INFO L175 Difference]: Start difference. First operand has 32 places, 25 transitions, 68 flow. Second operand 5 states and 731 transitions. [2023-11-06 23:03:35,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 51 transitions, 230 flow [2023-11-06 23:03:35,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 51 transitions, 207 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-11-06 23:03:35,539 INFO L231 Difference]: Finished difference. Result has 32 places, 28 transitions, 84 flow [2023-11-06 23:03:35,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=302, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=84, PETRI_PLACES=32, PETRI_TRANSITIONS=28} [2023-11-06 23:03:35,547 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 0 predicate places. [2023-11-06 23:03:35,547 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 28 transitions, 84 flow [2023-11-06 23:03:35,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 140.5) internal successors, (562), 4 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:35,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:03:35,549 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:03:35,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 23:03:35,550 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)] === [2023-11-06 23:03:35,552 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:35,552 INFO L85 PathProgramCache]: Analyzing trace with hash -54119804, now seen corresponding path program 2 times [2023-11-06 23:03:35,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:35,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244127042] [2023-11-06 23:03:35,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:35,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:35,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:36,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:03:36,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:36,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244127042] [2023-11-06 23:03:36,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244127042] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:03:36,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:03:36,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 23:03:36,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373283805] [2023-11-06 23:03:36,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:03:36,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 23:03:36,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:36,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 23:03:36,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-06 23:03:36,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 302 [2023-11-06 23:03:36,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 28 transitions, 84 flow. Second operand has 6 states, 6 states have (on average 135.0) internal successors, (810), 6 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:36,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:03:36,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 302 [2023-11-06 23:03:36,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:03:36,432 INFO L124 PetriNetUnfolderBase]: 530/812 cut-off events. [2023-11-06 23:03:36,433 INFO L125 PetriNetUnfolderBase]: For 200/200 co-relation queries the response was YES. [2023-11-06 23:03:36,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1863 conditions, 812 events. 530/812 cut-off events. For 200/200 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3331 event pairs, 36 based on Foata normal form. 20/715 useless extension candidates. Maximal degree in co-relation 705. Up to 298 conditions per place. [2023-11-06 23:03:36,440 INFO L140 encePairwiseOnDemand]: 295/302 looper letters, 54 selfloop transitions, 6 changer transitions 4/65 dead transitions. [2023-11-06 23:03:36,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 65 transitions, 300 flow [2023-11-06 23:03:36,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 23:03:36,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 23:03:36,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 988 transitions. [2023-11-06 23:03:36,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.467360454115421 [2023-11-06 23:03:36,446 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 988 transitions. [2023-11-06 23:03:36,446 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 988 transitions. [2023-11-06 23:03:36,447 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:03:36,448 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 988 transitions. [2023-11-06 23:03:36,451 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 141.14285714285714) internal successors, (988), 7 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:36,457 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 302.0) internal successors, (2416), 8 states have internal predecessors, (2416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:36,460 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 302.0) internal successors, (2416), 8 states have internal predecessors, (2416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:36,460 INFO L175 Difference]: Start difference. First operand has 32 places, 28 transitions, 84 flow. Second operand 7 states and 988 transitions. [2023-11-06 23:03:36,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 65 transitions, 300 flow [2023-11-06 23:03:36,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 65 transitions, 296 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 23:03:36,464 INFO L231 Difference]: Finished difference. Result has 39 places, 27 transitions, 98 flow [2023-11-06 23:03:36,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=302, PETRI_DIFFERENCE_MINUEND_FLOW=81, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=98, PETRI_PLACES=39, PETRI_TRANSITIONS=27} [2023-11-06 23:03:36,465 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 7 predicate places. [2023-11-06 23:03:36,466 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 27 transitions, 98 flow [2023-11-06 23:03:36,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 135.0) internal successors, (810), 6 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:36,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:03:36,467 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:03:36,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 23:03:36,468 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)] === [2023-11-06 23:03:36,469 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:36,469 INFO L85 PathProgramCache]: Analyzing trace with hash -991533602, now seen corresponding path program 1 times [2023-11-06 23:03:36,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:36,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863287582] [2023-11-06 23:03:36,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:36,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:36,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:36,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:03:36,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:36,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863287582] [2023-11-06 23:03:36,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863287582] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:03:36,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:03:36,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 23:03:36,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860712766] [2023-11-06 23:03:36,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:03:36,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:03:36,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:36,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:03:36,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:03:36,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 302 [2023-11-06 23:03:36,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 27 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 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) [2023-11-06 23:03:36,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:03:36,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 302 [2023-11-06 23:03:36,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:03:36,714 INFO L124 PetriNetUnfolderBase]: 205/384 cut-off events. [2023-11-06 23:03:36,714 INFO L125 PetriNetUnfolderBase]: For 483/483 co-relation queries the response was YES. [2023-11-06 23:03:36,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1009 conditions, 384 events. 205/384 cut-off events. For 483/483 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1446 event pairs, 87 based on Foata normal form. 14/354 useless extension candidates. Maximal degree in co-relation 662. Up to 264 conditions per place. [2023-11-06 23:03:36,719 INFO L140 encePairwiseOnDemand]: 299/302 looper letters, 28 selfloop transitions, 2 changer transitions 3/38 dead transitions. [2023-11-06 23:03:36,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 38 transitions, 196 flow [2023-11-06 23:03:36,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:03:36,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:03:36,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 448 transitions. [2023-11-06 23:03:36,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49448123620309054 [2023-11-06 23:03:36,722 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 448 transitions. [2023-11-06 23:03:36,723 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 448 transitions. [2023-11-06 23:03:36,723 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:03:36,723 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 448 transitions. [2023-11-06 23:03:36,725 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 149.33333333333334) internal successors, (448), 3 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:36,728 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 302.0) internal successors, (1208), 4 states have internal predecessors, (1208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:36,729 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 302.0) internal successors, (1208), 4 states have internal predecessors, (1208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:36,729 INFO L175 Difference]: Start difference. First operand has 39 places, 27 transitions, 98 flow. Second operand 3 states and 448 transitions. [2023-11-06 23:03:36,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 38 transitions, 196 flow [2023-11-06 23:03:36,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 38 transitions, 174 flow, removed 1 selfloop flow, removed 8 redundant places. [2023-11-06 23:03:36,733 INFO L231 Difference]: Finished difference. Result has 34 places, 28 transitions, 92 flow [2023-11-06 23:03:36,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=302, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=34, PETRI_TRANSITIONS=28} [2023-11-06 23:03:36,735 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 2 predicate places. [2023-11-06 23:03:36,735 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 28 transitions, 92 flow [2023-11-06 23:03:36,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 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) [2023-11-06 23:03:36,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:03:36,736 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] [2023-11-06 23:03:36,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 23:03:36,736 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)] === [2023-11-06 23:03:36,737 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:36,737 INFO L85 PathProgramCache]: Analyzing trace with hash -2073595580, now seen corresponding path program 1 times [2023-11-06 23:03:36,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:36,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668859802] [2023-11-06 23:03:36,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:36,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:36,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:36,881 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:03:36,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:36,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668859802] [2023-11-06 23:03:36,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668859802] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:03:36,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:03:36,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:03:36,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327054045] [2023-11-06 23:03:36,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:03:36,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:03:36,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:36,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:03:36,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:03:36,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 302 [2023-11-06 23:03:36,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 28 transitions, 92 flow. Second operand has 4 states, 4 states have (on average 139.25) internal successors, (557), 4 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:36,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:03:36,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 302 [2023-11-06 23:03:36,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:03:37,074 INFO L124 PetriNetUnfolderBase]: 234/450 cut-off events. [2023-11-06 23:03:37,075 INFO L125 PetriNetUnfolderBase]: For 294/294 co-relation queries the response was YES. [2023-11-06 23:03:37,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1135 conditions, 450 events. 234/450 cut-off events. For 294/294 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1775 event pairs, 187 based on Foata normal form. 10/404 useless extension candidates. Maximal degree in co-relation 746. Up to 330 conditions per place. [2023-11-06 23:03:37,080 INFO L140 encePairwiseOnDemand]: 298/302 looper letters, 22 selfloop transitions, 2 changer transitions 12/41 dead transitions. [2023-11-06 23:03:37,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 41 transitions, 197 flow [2023-11-06 23:03:37,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 23:03:37,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 23:03:37,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 572 transitions. [2023-11-06 23:03:37,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4735099337748344 [2023-11-06 23:03:37,084 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 572 transitions. [2023-11-06 23:03:37,084 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 572 transitions. [2023-11-06 23:03:37,085 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:03:37,085 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 572 transitions. [2023-11-06 23:03:37,087 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 143.0) internal successors, (572), 4 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:37,091 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 302.0) internal successors, (1510), 5 states have internal predecessors, (1510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:37,093 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 302.0) internal successors, (1510), 5 states have internal predecessors, (1510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:37,093 INFO L175 Difference]: Start difference. First operand has 34 places, 28 transitions, 92 flow. Second operand 4 states and 572 transitions. [2023-11-06 23:03:37,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 41 transitions, 197 flow [2023-11-06 23:03:37,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 41 transitions, 195 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 23:03:37,097 INFO L231 Difference]: Finished difference. Result has 38 places, 29 transitions, 104 flow [2023-11-06 23:03:37,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=302, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=104, PETRI_PLACES=38, PETRI_TRANSITIONS=29} [2023-11-06 23:03:37,098 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 6 predicate places. [2023-11-06 23:03:37,099 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 29 transitions, 104 flow [2023-11-06 23:03:37,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 139.25) internal successors, (557), 4 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:37,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:03:37,100 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] [2023-11-06 23:03:37,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 23:03:37,100 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)] === [2023-11-06 23:03:37,101 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:37,101 INFO L85 PathProgramCache]: Analyzing trace with hash -965779814, now seen corresponding path program 1 times [2023-11-06 23:03:37,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:37,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834909933] [2023-11-06 23:03:37,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:37,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:37,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:38,458 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:03:38,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:38,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834909933] [2023-11-06 23:03:38,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834909933] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:03:38,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034933240] [2023-11-06 23:03:38,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:38,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:38,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6674afb-13b9-4918-a968-cb72f00397eb/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:03:38,465 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6674afb-13b9-4918-a968-cb72f00397eb/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:03:38,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6674afb-13b9-4918-a968-cb72f00397eb/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 23:03:38,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:38,658 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 41 conjunts are in the unsatisfiable core [2023-11-06 23:03:38,667 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:03:38,844 INFO L351 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 [2023-11-06 23:03:38,944 INFO L351 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 8 treesize of output 1 [2023-11-06 23:03:39,164 INFO L351 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 8 treesize of output 1 [2023-11-06 23:03:39,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:03:39,333 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-06 23:03:39,533 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:03:39,533 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:03:40,522 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:03:40,523 INFO L351 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 53 [2023-11-06 23:03:40,562 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:03:40,563 INFO L351 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 1504 treesize of output 1432 [2023-11-06 23:03:40,620 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:03:40,620 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 138 treesize of output 134 [2023-11-06 23:03:40,650 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:03:40,652 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 126 treesize of output 110 [2023-11-06 23:03:40,679 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 74 treesize of output 50 [2023-11-06 23:03:41,133 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:03:41,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034933240] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:03:41,134 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:03:41,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 34 [2023-11-06 23:03:41,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917186697] [2023-11-06 23:03:41,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:03:41,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-06 23:03:41,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:41,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-06 23:03:41,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1053, Unknown=10, NotChecked=0, Total=1190 [2023-11-06 23:03:42,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 302 [2023-11-06 23:03:42,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 29 transitions, 104 flow. Second operand has 35 states, 35 states have (on average 79.8) internal successors, (2793), 35 states have internal predecessors, (2793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:42,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:03:42,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 302 [2023-11-06 23:03:42,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:03:46,618 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 23:03:48,782 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 23:03:56,970 INFO L124 PetriNetUnfolderBase]: 1367/2261 cut-off events. [2023-11-06 23:03:56,971 INFO L125 PetriNetUnfolderBase]: For 1056/1056 co-relation queries the response was YES. [2023-11-06 23:03:56,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6038 conditions, 2261 events. 1367/2261 cut-off events. For 1056/1056 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 11323 event pairs, 81 based on Foata normal form. 33/2059 useless extension candidates. Maximal degree in co-relation 6021. Up to 466 conditions per place. [2023-11-06 23:03:56,992 INFO L140 encePairwiseOnDemand]: 286/302 looper letters, 277 selfloop transitions, 103 changer transitions 44/424 dead transitions. [2023-11-06 23:03:56,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 424 transitions, 2095 flow [2023-11-06 23:03:56,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-11-06 23:03:56,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2023-11-06 23:03:57,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 5102 transitions. [2023-11-06 23:03:57,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2815673289183223 [2023-11-06 23:03:57,022 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 5102 transitions. [2023-11-06 23:03:57,022 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 5102 transitions. [2023-11-06 23:03:57,027 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:03:57,027 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 5102 transitions. [2023-11-06 23:03:57,045 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 85.03333333333333) internal successors, (5102), 60 states have internal predecessors, (5102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:57,083 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 302.0) internal successors, (18422), 61 states have internal predecessors, (18422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:57,090 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 302.0) internal successors, (18422), 61 states have internal predecessors, (18422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:57,090 INFO L175 Difference]: Start difference. First operand has 38 places, 29 transitions, 104 flow. Second operand 60 states and 5102 transitions. [2023-11-06 23:03:57,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 424 transitions, 2095 flow [2023-11-06 23:03:57,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 424 transitions, 2077 flow, removed 8 selfloop flow, removed 2 redundant places. [2023-11-06 23:03:57,109 INFO L231 Difference]: Finished difference. Result has 120 places, 134 transitions, 918 flow [2023-11-06 23:03:57,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=302, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=918, PETRI_PLACES=120, PETRI_TRANSITIONS=134} [2023-11-06 23:03:57,111 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 88 predicate places. [2023-11-06 23:03:57,111 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 134 transitions, 918 flow [2023-11-06 23:03:57,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 79.8) internal successors, (2793), 35 states have internal predecessors, (2793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:57,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:03:57,113 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] [2023-11-06 23:03:57,129 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6674afb-13b9-4918-a968-cb72f00397eb/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-06 23:03:57,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6674afb-13b9-4918-a968-cb72f00397eb/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:57,319 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)] === [2023-11-06 23:03:57,319 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:57,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1369855470, now seen corresponding path program 2 times [2023-11-06 23:03:57,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:57,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885285449] [2023-11-06 23:03:57,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:57,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:57,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:58,757 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:03:58,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:58,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885285449] [2023-11-06 23:03:58,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885285449] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:03:58,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223995948] [2023-11-06 23:03:58,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:03:58,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:58,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6674afb-13b9-4918-a968-cb72f00397eb/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:03:58,759 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6674afb-13b9-4918-a968-cb72f00397eb/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:03:58,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6674afb-13b9-4918-a968-cb72f00397eb/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 23:03:58,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:03:58,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:03:58,887 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-06 23:03:58,891 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:03:58,987 INFO L351 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 [2023-11-06 23:03:59,068 INFO L351 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 8 treesize of output 1 [2023-11-06 23:03:59,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:03:59,346 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-06 23:03:59,598 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:03:59,598 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:04:00,360 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:04:00,361 INFO L351 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 47 [2023-11-06 23:04:00,377 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:04:00,377 INFO L351 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 100 [2023-11-06 23:04:00,389 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 68 treesize of output 56 [2023-11-06 23:04:00,406 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:04:00,407 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 55 treesize of output 51 [2023-11-06 23:04:00,621 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:04:00,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223995948] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:04:00,621 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:04:00,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 32 [2023-11-06 23:04:00,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797943572] [2023-11-06 23:04:00,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:04:00,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-06 23:04:00,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:00,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-06 23:04:00,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=931, Unknown=4, NotChecked=0, Total=1056 [2023-11-06 23:04:02,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 302 [2023-11-06 23:04:02,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 134 transitions, 918 flow. Second operand has 33 states, 33 states have (on average 82.87878787878788) internal successors, (2735), 33 states have internal predecessors, (2735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:02,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:04:02,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 302 [2023-11-06 23:04:02,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:04:03,661 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~queue~0.offset (* c_~front~0 4)))) (and (or (< c_~n~0 (+ c_~back~0 1)) (< c_~back~0 0) (forall ((v_ArrVal_128 (Array Int Int))) (< (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_128) c_~queue~0.base) .cse0) c_~d~0) 2)) (not (= (select (select |c_#memory_int| c_~queue~0.base) (+ c_~queue~0.offset (* c_~back~0 4))) 1))) (forall ((v_ArrVal_128 (Array Int Int))) (< (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_128) c_~queue~0.base) .cse0) c_~d~0) (+ c_~W~0 1))) (= c_~v_assert~0 1))) is different from false [2023-11-06 23:04:04,486 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_128 (Array Int Int))) (< (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_128) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4))) c_~d~0) (+ c_~W~0 1))) (< 0 (mod c_~v_assert~0 256))) is different from false [2023-11-06 23:04:06,702 INFO L124 PetriNetUnfolderBase]: 2218/3612 cut-off events. [2023-11-06 23:04:06,702 INFO L125 PetriNetUnfolderBase]: For 66159/66159 co-relation queries the response was YES. [2023-11-06 23:04:06,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23201 conditions, 3612 events. 2218/3612 cut-off events. For 66159/66159 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 19840 event pairs, 157 based on Foata normal form. 24/3632 useless extension candidates. Maximal degree in co-relation 23020. Up to 871 conditions per place. [2023-11-06 23:04:06,765 INFO L140 encePairwiseOnDemand]: 287/302 looper letters, 273 selfloop transitions, 136 changer transitions 38/447 dead transitions. [2023-11-06 23:04:06,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 447 transitions, 5029 flow [2023-11-06 23:04:06,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-11-06 23:04:06,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2023-11-06 23:04:06,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 4242 transitions. [2023-11-06 23:04:06,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29263245033112584 [2023-11-06 23:04:06,786 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 4242 transitions. [2023-11-06 23:04:06,786 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 4242 transitions. [2023-11-06 23:04:06,790 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:04:06,790 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 4242 transitions. [2023-11-06 23:04:06,802 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 88.375) internal successors, (4242), 48 states have internal predecessors, (4242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:06,827 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 302.0) internal successors, (14798), 49 states have internal predecessors, (14798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:06,833 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 302.0) internal successors, (14798), 49 states have internal predecessors, (14798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:06,833 INFO L175 Difference]: Start difference. First operand has 120 places, 134 transitions, 918 flow. Second operand 48 states and 4242 transitions. [2023-11-06 23:04:06,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 447 transitions, 5029 flow [2023-11-06 23:04:06,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 447 transitions, 4903 flow, removed 38 selfloop flow, removed 5 redundant places. [2023-11-06 23:04:06,993 INFO L231 Difference]: Finished difference. Result has 182 places, 207 transitions, 2056 flow [2023-11-06 23:04:06,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=302, PETRI_DIFFERENCE_MINUEND_FLOW=838, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=2056, PETRI_PLACES=182, PETRI_TRANSITIONS=207} [2023-11-06 23:04:06,996 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 150 predicate places. [2023-11-06 23:04:06,997 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 207 transitions, 2056 flow [2023-11-06 23:04:06,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 82.87878787878788) internal successors, (2735), 33 states have internal predecessors, (2735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:06,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:04:06,999 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] [2023-11-06 23:04:07,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6674afb-13b9-4918-a968-cb72f00397eb/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 23:04:07,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6674afb-13b9-4918-a968-cb72f00397eb/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-06 23:04:07,211 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)] === [2023-11-06 23:04:07,212 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:07,212 INFO L85 PathProgramCache]: Analyzing trace with hash -900442834, now seen corresponding path program 3 times [2023-11-06 23:04:07,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:07,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932052512] [2023-11-06 23:04:07,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:07,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:07,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:08,640 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:04:08,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:08,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932052512] [2023-11-06 23:04:08,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932052512] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:04:08,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293319837] [2023-11-06 23:04:08,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 23:04:08,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:08,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6674afb-13b9-4918-a968-cb72f00397eb/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:04:08,642 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6674afb-13b9-4918-a968-cb72f00397eb/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:04:08,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6674afb-13b9-4918-a968-cb72f00397eb/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 23:04:08,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 23:04:08,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:04:08,756 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 45 conjunts are in the unsatisfiable core [2023-11-06 23:04:08,760 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:08,870 INFO L351 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 [2023-11-06 23:04:08,947 INFO L351 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 8 treesize of output 1 [2023-11-06 23:04:09,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:09,277 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-06 23:04:09,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:09,407 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-06 23:04:09,626 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:04:09,627 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:04:10,590 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:04:10,591 INFO L351 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 50 [2023-11-06 23:04:10,611 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:04:10,611 INFO L351 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 1382 treesize of output 1318 [2023-11-06 23:04:10,646 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:04:10,646 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 98 treesize of output 94 [2023-11-06 23:04:10,659 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 146 treesize of output 122 [2023-11-06 23:04:10,673 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 66 treesize of output 54 [2023-11-06 23:04:11,041 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:04:11,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293319837] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:04:11,041 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:04:11,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 34 [2023-11-06 23:04:11,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854772301] [2023-11-06 23:04:11,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:04:11,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-06 23:04:11,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:11,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-06 23:04:11,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1046, Unknown=4, NotChecked=0, Total=1190 [2023-11-06 23:04:13,806 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 23:04:16,192 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 23:04:18,638 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 23:04:20,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 302 [2023-11-06 23:04:20,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 207 transitions, 2056 flow. Second operand has 35 states, 35 states have (on average 79.8) internal successors, (2793), 35 states have internal predecessors, (2793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:20,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:04:20,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 302 [2023-11-06 23:04:20,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:04:26,243 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 23:04:28,645 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 23:04:31,367 INFO L124 PetriNetUnfolderBase]: 2528/4125 cut-off events. [2023-11-06 23:04:31,367 INFO L125 PetriNetUnfolderBase]: For 137574/137574 co-relation queries the response was YES. [2023-11-06 23:04:31,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34174 conditions, 4125 events. 2528/4125 cut-off events. For 137574/137574 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 22977 event pairs, 185 based on Foata normal form. 24/4148 useless extension candidates. Maximal degree in co-relation 33877. Up to 1002 conditions per place. [2023-11-06 23:04:31,435 INFO L140 encePairwiseOnDemand]: 287/302 looper letters, 232 selfloop transitions, 155 changer transitions 16/403 dead transitions. [2023-11-06 23:04:31,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 403 transitions, 5511 flow [2023-11-06 23:04:31,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-06 23:04:31,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-11-06 23:04:31,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2790 transitions. [2023-11-06 23:04:31,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27995183624322695 [2023-11-06 23:04:31,442 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2790 transitions. [2023-11-06 23:04:31,443 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2790 transitions. [2023-11-06 23:04:31,444 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:04:31,444 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2790 transitions. [2023-11-06 23:04:31,450 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 84.54545454545455) internal successors, (2790), 33 states have internal predecessors, (2790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:31,464 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 302.0) internal successors, (10268), 34 states have internal predecessors, (10268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:31,468 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 302.0) internal successors, (10268), 34 states have internal predecessors, (10268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:31,468 INFO L175 Difference]: Start difference. First operand has 182 places, 207 transitions, 2056 flow. Second operand 33 states and 2790 transitions. [2023-11-06 23:04:31,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 403 transitions, 5511 flow [2023-11-06 23:04:31,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 403 transitions, 5082 flow, removed 186 selfloop flow, removed 17 redundant places. [2023-11-06 23:04:31,912 INFO L231 Difference]: Finished difference. Result has 201 places, 240 transitions, 2658 flow [2023-11-06 23:04:31,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=302, PETRI_DIFFERENCE_MINUEND_FLOW=1748, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=2658, PETRI_PLACES=201, PETRI_TRANSITIONS=240} [2023-11-06 23:04:31,914 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 169 predicate places. [2023-11-06 23:04:31,914 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 240 transitions, 2658 flow [2023-11-06 23:04:31,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 79.8) internal successors, (2793), 35 states have internal predecessors, (2793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:31,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:04:31,916 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] [2023-11-06 23:04:31,922 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6674afb-13b9-4918-a968-cb72f00397eb/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 23:04:32,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6674afb-13b9-4918-a968-cb72f00397eb/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-06 23:04:32,122 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)] === [2023-11-06 23:04:32,122 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:32,123 INFO L85 PathProgramCache]: Analyzing trace with hash 819308494, now seen corresponding path program 4 times [2023-11-06 23:04:32,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:32,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409659437] [2023-11-06 23:04:32,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:32,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:32,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:33,588 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:04:33,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:33,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409659437] [2023-11-06 23:04:33,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409659437] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:04:33,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028505383] [2023-11-06 23:04:33,589 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 23:04:33,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:33,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6674afb-13b9-4918-a968-cb72f00397eb/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:04:33,593 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6674afb-13b9-4918-a968-cb72f00397eb/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:04:33,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6674afb-13b9-4918-a968-cb72f00397eb/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 23:04:33,716 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 23:04:33,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:04:33,718 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-06 23:04:33,721 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:34,175 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:04:34,175 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:04:34,427 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:04:34,427 INFO L351 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 28 treesize of output 20 [2023-11-06 23:04:34,626 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:04:34,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028505383] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:04:34,626 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:04:34,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 29 [2023-11-06 23:04:34,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154447115] [2023-11-06 23:04:34,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:04:34,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-06 23:04:34,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:34,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-06 23:04:34,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=756, Unknown=0, NotChecked=0, Total=870 [2023-11-06 23:04:36,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 302 [2023-11-06 23:04:36,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 240 transitions, 2658 flow. Second operand has 30 states, 30 states have (on average 108.3) internal successors, (3249), 30 states have internal predecessors, (3249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:36,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:04:36,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 302 [2023-11-06 23:04:36,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:04:39,369 INFO L124 PetriNetUnfolderBase]: 2907/4776 cut-off events. [2023-11-06 23:04:39,369 INFO L125 PetriNetUnfolderBase]: For 192134/192134 co-relation queries the response was YES. [2023-11-06 23:04:39,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43286 conditions, 4776 events. 2907/4776 cut-off events. For 192134/192134 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 27641 event pairs, 137 based on Foata normal form. 16/4791 useless extension candidates. Maximal degree in co-relation 37040. Up to 1790 conditions per place. [2023-11-06 23:04:39,426 INFO L140 encePairwiseOnDemand]: 286/302 looper letters, 281 selfloop transitions, 165 changer transitions 19/465 dead transitions. [2023-11-06 23:04:39,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 465 transitions, 6710 flow [2023-11-06 23:04:39,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-06 23:04:39,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-11-06 23:04:39,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 3499 transitions. [2023-11-06 23:04:39,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3737449262977996 [2023-11-06 23:04:39,434 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 3499 transitions. [2023-11-06 23:04:39,434 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 3499 transitions. [2023-11-06 23:04:39,435 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:04:39,436 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 3499 transitions. [2023-11-06 23:04:39,442 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 112.87096774193549) internal successors, (3499), 31 states have internal predecessors, (3499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:39,456 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 302.0) internal successors, (9664), 32 states have internal predecessors, (9664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:39,459 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 302.0) internal successors, (9664), 32 states have internal predecessors, (9664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:39,459 INFO L175 Difference]: Start difference. First operand has 201 places, 240 transitions, 2658 flow. Second operand 31 states and 3499 transitions. [2023-11-06 23:04:39,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 465 transitions, 6710 flow [2023-11-06 23:04:39,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 465 transitions, 6345 flow, removed 122 selfloop flow, removed 18 redundant places. [2023-11-06 23:04:40,011 INFO L231 Difference]: Finished difference. Result has 222 places, 290 transitions, 3637 flow [2023-11-06 23:04:40,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=302, PETRI_DIFFERENCE_MINUEND_FLOW=2499, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=3637, PETRI_PLACES=222, PETRI_TRANSITIONS=290} [2023-11-06 23:04:40,012 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 190 predicate places. [2023-11-06 23:04:40,013 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 290 transitions, 3637 flow [2023-11-06 23:04:40,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 108.3) internal successors, (3249), 30 states have internal predecessors, (3249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:40,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:04:40,014 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] [2023-11-06 23:04:40,020 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6674afb-13b9-4918-a968-cb72f00397eb/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 23:04:40,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6674afb-13b9-4918-a968-cb72f00397eb/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:40,217 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)] === [2023-11-06 23:04:40,217 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:40,218 INFO L85 PathProgramCache]: Analyzing trace with hash 436552290, now seen corresponding path program 5 times [2023-11-06 23:04:40,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:40,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947333537] [2023-11-06 23:04:40,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:40,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:40,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:41,820 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:04:41,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:41,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947333537] [2023-11-06 23:04:41,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947333537] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:04:41,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578338205] [2023-11-06 23:04:41,820 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 23:04:41,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:41,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6674afb-13b9-4918-a968-cb72f00397eb/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:04:41,825 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6674afb-13b9-4918-a968-cb72f00397eb/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:04:41,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6674afb-13b9-4918-a968-cb72f00397eb/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 23:04:41,949 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:04:41,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:04:41,951 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-06 23:04:41,954 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:41,964 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 147 treesize of output 143 [2023-11-06 23:04:42,315 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-06 23:04:42,536 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:04:42,536 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:04:42,772 WARN L839 $PredicateComparison]: unable to prove that (or (= (mod c_~v_assert~0 256) 0) (forall ((v_ArrVal_240 (Array Int Int))) (< (+ c_~d~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_240) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4)))) (+ c_~W~0 1)))) is different from false [2023-11-06 23:04:42,806 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:04:42,806 INFO L351 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 50 treesize of output 42 [2023-11-06 23:04:42,812 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 5 [2023-11-06 23:04:43,064 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 1 not checked. [2023-11-06 23:04:43,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578338205] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:04:43,065 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:04:43,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 34 [2023-11-06 23:04:43,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607509328] [2023-11-06 23:04:43,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:04:43,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-06 23:04:43,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:43,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-06 23:04:43,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=990, Unknown=1, NotChecked=64, Total=1190 [2023-11-06 23:04:43,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 302 [2023-11-06 23:04:43,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 290 transitions, 3637 flow. Second operand has 35 states, 35 states have (on average 85.97142857142858) internal successors, (3009), 35 states have internal predecessors, (3009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:43,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:04:43,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 302 [2023-11-06 23:04:43,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:04:46,748 INFO L124 PetriNetUnfolderBase]: 3173/5207 cut-off events. [2023-11-06 23:04:46,748 INFO L125 PetriNetUnfolderBase]: For 260580/260580 co-relation queries the response was YES. [2023-11-06 23:04:46,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50858 conditions, 5207 events. 3173/5207 cut-off events. For 260580/260580 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 30658 event pairs, 182 based on Foata normal form. 16/5223 useless extension candidates. Maximal degree in co-relation 49780. Up to 1701 conditions per place. [2023-11-06 23:04:46,837 INFO L140 encePairwiseOnDemand]: 288/302 looper letters, 279 selfloop transitions, 177 changer transitions 7/463 dead transitions. [2023-11-06 23:04:46,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 463 transitions, 7175 flow [2023-11-06 23:04:46,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-06 23:04:46,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-11-06 23:04:46,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2805 transitions. [2023-11-06 23:04:46,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2996154667806024 [2023-11-06 23:04:46,845 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2805 transitions. [2023-11-06 23:04:46,845 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2805 transitions. [2023-11-06 23:04:46,847 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:04:46,847 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2805 transitions. [2023-11-06 23:04:46,853 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 90.48387096774194) internal successors, (2805), 31 states have internal predecessors, (2805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:46,866 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 302.0) internal successors, (9664), 32 states have internal predecessors, (9664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:46,868 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 302.0) internal successors, (9664), 32 states have internal predecessors, (9664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:46,868 INFO L175 Difference]: Start difference. First operand has 222 places, 290 transitions, 3637 flow. Second operand 31 states and 2805 transitions. [2023-11-06 23:04:46,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 463 transitions, 7175 flow [2023-11-06 23:04:47,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 463 transitions, 6818 flow, removed 97 selfloop flow, removed 12 redundant places. [2023-11-06 23:04:47,389 INFO L231 Difference]: Finished difference. Result has 243 places, 304 transitions, 3961 flow [2023-11-06 23:04:47,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=302, PETRI_DIFFERENCE_MINUEND_FLOW=3308, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=3961, PETRI_PLACES=243, PETRI_TRANSITIONS=304} [2023-11-06 23:04:47,390 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 211 predicate places. [2023-11-06 23:04:47,390 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 304 transitions, 3961 flow [2023-11-06 23:04:47,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 85.97142857142858) internal successors, (3009), 35 states have internal predecessors, (3009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:47,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:04:47,391 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:04:47,397 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6674afb-13b9-4918-a968-cb72f00397eb/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 23:04:47,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6674afb-13b9-4918-a968-cb72f00397eb/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:47,596 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)] === [2023-11-06 23:04:47,597 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:47,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1972763510, now seen corresponding path program 6 times [2023-11-06 23:04:47,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:47,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754963538] [2023-11-06 23:04:47,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:47,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:47,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:47,806 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:04:47,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:47,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754963538] [2023-11-06 23:04:47,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754963538] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:04:47,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010725168] [2023-11-06 23:04:47,807 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 23:04:47,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:47,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6674afb-13b9-4918-a968-cb72f00397eb/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:04:47,809 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6674afb-13b9-4918-a968-cb72f00397eb/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:04:47,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6674afb-13b9-4918-a968-cb72f00397eb/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 23:04:47,971 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-06 23:04:47,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:04:47,973 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 23:04:47,975 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:48,073 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:04:48,073 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:04:48,196 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:04:48,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010725168] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:04:48,196 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:04:48,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-06 23:04:48,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216933894] [2023-11-06 23:04:48,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:04:48,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 23:04:48,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:48,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 23:04:48,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-11-06 23:04:48,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 302 [2023-11-06 23:04:48,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 304 transitions, 3961 flow. Second operand has 12 states, 12 states have (on average 130.75) internal successors, (1569), 12 states have internal predecessors, (1569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:48,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:04:48,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 302 [2023-11-06 23:04:48,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:04:49,790 INFO L124 PetriNetUnfolderBase]: 1921/3550 cut-off events. [2023-11-06 23:04:49,790 INFO L125 PetriNetUnfolderBase]: For 172845/173001 co-relation queries the response was YES. [2023-11-06 23:04:49,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33367 conditions, 3550 events. 1921/3550 cut-off events. For 172845/173001 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 23429 event pairs, 784 based on Foata normal form. 179/3649 useless extension candidates. Maximal degree in co-relation 31393. Up to 1984 conditions per place. [2023-11-06 23:04:49,870 INFO L140 encePairwiseOnDemand]: 297/302 looper letters, 117 selfloop transitions, 13 changer transitions 138/300 dead transitions. [2023-11-06 23:04:49,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 300 transitions, 4351 flow [2023-11-06 23:04:49,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 23:04:49,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-06 23:04:49,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1087 transitions. [2023-11-06 23:04:49,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44991721854304634 [2023-11-06 23:04:49,873 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1087 transitions. [2023-11-06 23:04:49,873 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1087 transitions. [2023-11-06 23:04:49,874 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:04:49,874 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1087 transitions. [2023-11-06 23:04:49,876 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 135.875) internal successors, (1087), 8 states have internal predecessors, (1087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:49,878 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 302.0) internal successors, (2718), 9 states have internal predecessors, (2718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:49,879 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 302.0) internal successors, (2718), 9 states have internal predecessors, (2718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:49,879 INFO L175 Difference]: Start difference. First operand has 243 places, 304 transitions, 3961 flow. Second operand 8 states and 1087 transitions. [2023-11-06 23:04:49,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 300 transitions, 4351 flow [2023-11-06 23:04:50,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 300 transitions, 4176 flow, removed 10 selfloop flow, removed 22 redundant places. [2023-11-06 23:04:50,301 INFO L231 Difference]: Finished difference. Result has 226 places, 158 transitions, 1787 flow [2023-11-06 23:04:50,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=302, PETRI_DIFFERENCE_MINUEND_FLOW=3388, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1787, PETRI_PLACES=226, PETRI_TRANSITIONS=158} [2023-11-06 23:04:50,302 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 194 predicate places. [2023-11-06 23:04:50,302 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 158 transitions, 1787 flow [2023-11-06 23:04:50,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 130.75) internal successors, (1569), 12 states have internal predecessors, (1569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:50,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:04:50,304 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:04:50,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6674afb-13b9-4918-a968-cb72f00397eb/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 23:04:50,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6674afb-13b9-4918-a968-cb72f00397eb/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 23:04:50,511 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)] === [2023-11-06 23:04:50,511 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:50,511 INFO L85 PathProgramCache]: Analyzing trace with hash 13554338, now seen corresponding path program 7 times [2023-11-06 23:04:50,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:50,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107165262] [2023-11-06 23:04:50,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:50,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:50,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:52,548 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:04:52,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:52,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107165262] [2023-11-06 23:04:52,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107165262] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:04:52,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134470874] [2023-11-06 23:04:52,549 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 23:04:52,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:52,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6674afb-13b9-4918-a968-cb72f00397eb/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:04:52,551 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6674afb-13b9-4918-a968-cb72f00397eb/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:04:52,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6674afb-13b9-4918-a968-cb72f00397eb/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 23:04:52,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:52,692 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-06 23:04:52,695 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:52,710 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 34 treesize of output 32 [2023-11-06 23:04:53,161 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-06 23:04:53,231 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-06 23:04:53,436 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:04:53,436 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:04:53,704 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_320 (Array Int Int)) (v_ArrVal_321 (Array Int Int))) (< (+ c_~d~0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_320) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_321) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4)))) (+ c_~W~0 1))) is different from false [2023-11-06 23:04:53,726 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:04:53,726 INFO L351 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 190 treesize of output 174 [2023-11-06 23:04:53,737 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 31 treesize of output 25 [2023-11-06 23:04:53,766 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 32 treesize of output 20 [2023-11-06 23:04:54,108 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 1 not checked. [2023-11-06 23:04:54,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134470874] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:04:54,108 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:04:54,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 12] total 38 [2023-11-06 23:04:54,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782454399] [2023-11-06 23:04:54,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:04:54,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-11-06 23:04:54,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:54,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-11-06 23:04:54,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1233, Unknown=7, NotChecked=72, Total=1482 [2023-11-06 23:04:54,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 302 [2023-11-06 23:04:54,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 158 transitions, 1787 flow. Second operand has 39 states, 39 states have (on average 82.76923076923077) internal successors, (3228), 39 states have internal predecessors, (3228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:54,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:04:54,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 302 [2023-11-06 23:04:54,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:04:57,576 INFO L124 PetriNetUnfolderBase]: 2227/3635 cut-off events. [2023-11-06 23:04:57,576 INFO L125 PetriNetUnfolderBase]: For 201421/201421 co-relation queries the response was YES. [2023-11-06 23:04:57,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36238 conditions, 3635 events. 2227/3635 cut-off events. For 201421/201421 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 19433 event pairs, 73 based on Foata normal form. 16/3651 useless extension candidates. Maximal degree in co-relation 32399. Up to 1201 conditions per place. [2023-11-06 23:04:57,631 INFO L140 encePairwiseOnDemand]: 289/302 looper letters, 203 selfloop transitions, 116 changer transitions 7/326 dead transitions. [2023-11-06 23:04:57,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 326 transitions, 4996 flow [2023-11-06 23:04:57,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-06 23:04:57,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-11-06 23:04:57,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2700 transitions. [2023-11-06 23:04:57,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2883999145481735 [2023-11-06 23:04:57,640 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2700 transitions. [2023-11-06 23:04:57,640 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2700 transitions. [2023-11-06 23:04:57,642 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:04:57,642 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2700 transitions. [2023-11-06 23:04:57,648 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 87.09677419354838) internal successors, (2700), 31 states have internal predecessors, (2700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:57,660 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 302.0) internal successors, (9664), 32 states have internal predecessors, (9664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:57,662 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 302.0) internal successors, (9664), 32 states have internal predecessors, (9664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:57,662 INFO L175 Difference]: Start difference. First operand has 226 places, 158 transitions, 1787 flow. Second operand 31 states and 2700 transitions. [2023-11-06 23:04:57,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 326 transitions, 4996 flow [2023-11-06 23:04:58,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 326 transitions, 3856 flow, removed 555 selfloop flow, removed 27 redundant places. [2023-11-06 23:04:58,048 INFO L231 Difference]: Finished difference. Result has 179 places, 180 transitions, 2156 flow [2023-11-06 23:04:58,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=302, PETRI_DIFFERENCE_MINUEND_FLOW=1587, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=2156, PETRI_PLACES=179, PETRI_TRANSITIONS=180} [2023-11-06 23:04:58,049 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 147 predicate places. [2023-11-06 23:04:58,049 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 180 transitions, 2156 flow [2023-11-06 23:04:58,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 82.76923076923077) internal successors, (3228), 39 states have internal predecessors, (3228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:58,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:04:58,050 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] [2023-11-06 23:04:58,059 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6674afb-13b9-4918-a968-cb72f00397eb/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 23:04:58,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6674afb-13b9-4918-a968-cb72f00397eb/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-06 23:04:58,256 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)] === [2023-11-06 23:04:58,257 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:58,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1474288884, now seen corresponding path program 8 times [2023-11-06 23:04:58,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:58,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230077195] [2023-11-06 23:04:58,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:58,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:58,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:58,375 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:04:58,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:58,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230077195] [2023-11-06 23:04:58,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230077195] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:04:58,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135394333] [2023-11-06 23:04:58,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:04:58,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:58,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6674afb-13b9-4918-a968-cb72f00397eb/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:04:58,377 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6674afb-13b9-4918-a968-cb72f00397eb/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:04:58,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6674afb-13b9-4918-a968-cb72f00397eb/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 23:04:58,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:04:58,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:04:58,510 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 23:04:58,512 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:58,556 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:04:58,556 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:04:58,694 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:04:58,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135394333] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:04:58,694 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:04:58,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 7 [2023-11-06 23:04:58,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950036296] [2023-11-06 23:04:58,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:04:58,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 23:04:58,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:58,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 23:04:58,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-11-06 23:04:58,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 302 [2023-11-06 23:04:58,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 180 transitions, 2156 flow. Second operand has 8 states, 8 states have (on average 144.375) internal successors, (1155), 8 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:58,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:04:58,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 302 [2023-11-06 23:04:58,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:04:59,871 INFO L124 PetriNetUnfolderBase]: 3282/5961 cut-off events. [2023-11-06 23:04:59,871 INFO L125 PetriNetUnfolderBase]: For 136526/137226 co-relation queries the response was YES. [2023-11-06 23:04:59,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43166 conditions, 5961 events. 3282/5961 cut-off events. For 136526/137226 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 41971 event pairs, 822 based on Foata normal form. 294/6109 useless extension candidates. Maximal degree in co-relation 39857. Up to 2484 conditions per place. [2023-11-06 23:04:59,960 INFO L140 encePairwiseOnDemand]: 299/302 looper letters, 190 selfloop transitions, 44 changer transitions 4/276 dead transitions. [2023-11-06 23:04:59,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 276 transitions, 3779 flow [2023-11-06 23:04:59,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 23:04:59,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 23:04:59,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 610 transitions. [2023-11-06 23:04:59,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5049668874172185 [2023-11-06 23:04:59,963 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 610 transitions. [2023-11-06 23:04:59,963 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 610 transitions. [2023-11-06 23:04:59,964 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:04:59,964 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 610 transitions. [2023-11-06 23:04:59,965 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 152.5) internal successors, (610), 4 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:59,967 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 302.0) internal successors, (1510), 5 states have internal predecessors, (1510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:59,967 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 302.0) internal successors, (1510), 5 states have internal predecessors, (1510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:59,967 INFO L175 Difference]: Start difference. First operand has 179 places, 180 transitions, 2156 flow. Second operand 4 states and 610 transitions. [2023-11-06 23:04:59,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 276 transitions, 3779 flow [2023-11-06 23:05:00,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 276 transitions, 3528 flow, removed 29 selfloop flow, removed 12 redundant places. [2023-11-06 23:05:00,254 INFO L231 Difference]: Finished difference. Result has 172 places, 207 transitions, 2586 flow [2023-11-06 23:05:00,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=302, PETRI_DIFFERENCE_MINUEND_FLOW=1987, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2586, PETRI_PLACES=172, PETRI_TRANSITIONS=207} [2023-11-06 23:05:00,255 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 140 predicate places. [2023-11-06 23:05:00,255 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 207 transitions, 2586 flow [2023-11-06 23:05:00,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 144.375) internal successors, (1155), 8 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:00,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:05:00,256 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:05:00,275 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6674afb-13b9-4918-a968-cb72f00397eb/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 23:05:00,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6674afb-13b9-4918-a968-cb72f00397eb/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-06 23:05:00,463 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)] === [2023-11-06 23:05:00,464 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:05:00,464 INFO L85 PathProgramCache]: Analyzing trace with hash 723811500, now seen corresponding path program 9 times [2023-11-06 23:05:00,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:05:00,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71791259] [2023-11-06 23:05:00,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:00,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:05:00,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:05:01,672 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:05:01,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:05:01,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71791259] [2023-11-06 23:05:01,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71791259] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:05:01,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803573703] [2023-11-06 23:05:01,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 23:05:01,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:05:01,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6674afb-13b9-4918-a968-cb72f00397eb/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:05:01,674 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6674afb-13b9-4918-a968-cb72f00397eb/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:05:01,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6674afb-13b9-4918-a968-cb72f00397eb/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 23:05:01,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-06 23:05:01,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:05:01,934 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 50 conjunts are in the unsatisfiable core [2023-11-06 23:05:01,938 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:05:02,094 INFO L351 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 [2023-11-06 23:05:02,176 INFO L351 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 8 treesize of output 1 [2023-11-06 23:05:02,255 INFO L351 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 8 treesize of output 1 [2023-11-06 23:05:02,394 INFO L351 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 8 treesize of output 1 [2023-11-06 23:05:03,219 INFO L322 Elim1Store]: treesize reduction 42, result has 14.3 percent of original size [2023-11-06 23:05:03,220 INFO L351 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 45 treesize of output 19 [2023-11-06 23:05:03,332 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:05:03,332 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:05:05,235 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:05:05,236 INFO L351 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 131 treesize of output 95 [2023-11-06 23:05:05,302 INFO L322 Elim1Store]: treesize reduction 24, result has 51.0 percent of original size [2023-11-06 23:05:05,303 INFO L351 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 1074 treesize of output 1034 [2023-11-06 23:05:05,397 INFO L322 Elim1Store]: treesize reduction 24, result has 51.0 percent of original size [2023-11-06 23:05:05,398 INFO L351 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 490 treesize of output 418 [2023-11-06 23:05:05,438 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 23:05:05,439 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 23:05:05,441 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 23:05:05,468 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:05:05,470 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 312 treesize of output 312 [2023-11-06 23:05:05,565 INFO L322 Elim1Store]: treesize reduction 24, result has 51.0 percent of original size [2023-11-06 23:05:05,566 INFO L351 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 311 treesize of output 287 [2023-11-06 23:05:09,837 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:05:09,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803573703] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:05:09,838 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:05:09,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 17] total 45 [2023-11-06 23:05:09,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752894018] [2023-11-06 23:05:09,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:05:09,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-11-06 23:05:09,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:05:09,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-11-06 23:05:09,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=1783, Unknown=7, NotChecked=0, Total=2070 [2023-11-06 23:05:14,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 302 [2023-11-06 23:05:14,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 207 transitions, 2586 flow. Second operand has 46 states, 46 states have (on average 79.84782608695652) internal successors, (3673), 46 states have internal predecessors, (3673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:14,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:05:14,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 302 [2023-11-06 23:05:14,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:05:24,607 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 23:05:30,369 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 23:05:36,866 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 23:05:51,505 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 23:05:54,970 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 23:05:59,000 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 23:06:05,329 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 23:06:10,934 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 23:06:34,651 INFO L124 PetriNetUnfolderBase]: 28645/46688 cut-off events. [2023-11-06 23:06:34,651 INFO L125 PetriNetUnfolderBase]: For 827631/827631 co-relation queries the response was YES. [2023-11-06 23:06:34,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 310739 conditions, 46688 events. 28645/46688 cut-off events. For 827631/827631 co-relation queries the response was YES. Maximal size of possible extension queue 1692. Compared 376623 event pairs, 1811 based on Foata normal form. 402/47090 useless extension candidates. Maximal degree in co-relation 299467. Up to 11096 conditions per place. [2023-11-06 23:06:35,170 INFO L140 encePairwiseOnDemand]: 286/302 looper letters, 1277 selfloop transitions, 1136 changer transitions 388/2801 dead transitions. [2023-11-06 23:06:35,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 2801 transitions, 36699 flow [2023-11-06 23:06:35,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 199 states. [2023-11-06 23:06:35,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2023-11-06 23:06:35,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 17026 transitions. [2023-11-06 23:06:35,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28330393690305833 [2023-11-06 23:06:35,208 INFO L72 ComplementDD]: Start complementDD. Operand 199 states and 17026 transitions. [2023-11-06 23:06:35,208 INFO L73 IsDeterministic]: Start isDeterministic. Operand 199 states and 17026 transitions. [2023-11-06 23:06:35,231 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:06:35,231 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 199 states and 17026 transitions. [2023-11-06 23:06:35,260 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 200 states, 199 states have (on average 85.55778894472361) internal successors, (17026), 199 states have internal predecessors, (17026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:35,319 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 200 states, 200 states have (on average 302.0) internal successors, (60400), 200 states have internal predecessors, (60400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:35,331 INFO L81 ComplementDD]: Finished complementDD. Result has 200 states, 200 states have (on average 302.0) internal successors, (60400), 200 states have internal predecessors, (60400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:35,331 INFO L175 Difference]: Start difference. First operand has 172 places, 207 transitions, 2586 flow. Second operand 199 states and 17026 transitions. [2023-11-06 23:06:35,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 2801 transitions, 36699 flow [2023-11-06 23:06:37,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 2801 transitions, 35606 flow, removed 541 selfloop flow, removed 1 redundant places. [2023-11-06 23:06:37,147 INFO L231 Difference]: Finished difference. Result has 441 places, 1399 transitions, 22858 flow [2023-11-06 23:06:37,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=302, PETRI_DIFFERENCE_MINUEND_FLOW=2506, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=199, PETRI_FLOW=22858, PETRI_PLACES=441, PETRI_TRANSITIONS=1399} [2023-11-06 23:06:37,148 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 409 predicate places. [2023-11-06 23:06:37,148 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 1399 transitions, 22858 flow [2023-11-06 23:06:37,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 79.84782608695652) internal successors, (3673), 46 states have internal predecessors, (3673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:37,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:06:37,149 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:06:37,157 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6674afb-13b9-4918-a968-cb72f00397eb/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 23:06:37,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6674afb-13b9-4918-a968-cb72f00397eb/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:06:37,350 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)] === [2023-11-06 23:06:37,350 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:06:37,350 INFO L85 PathProgramCache]: Analyzing trace with hash 665202112, now seen corresponding path program 10 times [2023-11-06 23:06:37,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:06:37,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68362374] [2023-11-06 23:06:37,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:06:37,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:06:37,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:06:38,895 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:06:38,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:06:38,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68362374] [2023-11-06 23:06:38,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68362374] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:06:38,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351152202] [2023-11-06 23:06:38,896 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 23:06:38,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:06:38,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6674afb-13b9-4918-a968-cb72f00397eb/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:06:38,898 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6674afb-13b9-4918-a968-cb72f00397eb/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:06:38,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6674afb-13b9-4918-a968-cb72f00397eb/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 23:06:39,052 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 23:06:39,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:06:39,055 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-06 23:06:39,058 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:06:40,175 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:06:40,175 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:06:40,725 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:06:40,725 INFO L351 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 51 treesize of output 53 [2023-11-06 23:06:41,362 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:06:41,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351152202] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:06:41,363 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:06:41,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 41 [2023-11-06 23:06:41,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929111829] [2023-11-06 23:06:41,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:06:41,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-11-06 23:06:41,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:06:41,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-11-06 23:06:41,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1516, Unknown=0, NotChecked=0, Total=1722 [2023-11-06 23:06:46,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 302 [2023-11-06 23:06:46,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 1399 transitions, 22858 flow. Second operand has 42 states, 42 states have (on average 106.14285714285714) internal successors, (4458), 42 states have internal predecessors, (4458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:46,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:06:46,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 302 [2023-11-06 23:06:46,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand