./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-multiply-verify.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 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_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/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_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-multiply-verify.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/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_fd6dc348-9ae8-454c-a84b-47bc50aae420/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 b6872adb14a2dfa535a444bb6d903bd37f60f26cf718935f2927b47d5c5a6aaa --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:50:16,427 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:50:16,553 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:50:16,567 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:50:16,568 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:50:16,608 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:50:16,610 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:50:16,611 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:50:16,612 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:50:16,617 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:50:16,618 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:50:16,619 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:50:16,619 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:50:16,622 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:50:16,622 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:50:16,623 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:50:16,623 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:50:16,624 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:50:16,624 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:50:16,625 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:50:16,625 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:50:16,626 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:50:16,627 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:50:16,627 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:50:16,628 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:50:16,629 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:50:16,629 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:50:16,630 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:50:16,630 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:50:16,631 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:50:16,632 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:50:16,633 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:50:16,633 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:50:16,633 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:50:16,634 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:50:16,634 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:50:16,634 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:50:16,635 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:50:16,635 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:50:16,635 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_fd6dc348-9ae8-454c-a84b-47bc50aae420/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b6872adb14a2dfa535a444bb6d903bd37f60f26cf718935f2927b47d5c5a6aaa [2023-11-06 22:50:16,944 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:50:16,976 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:50:16,979 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:50:16,981 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:50:16,981 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:50:16,983 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/popl20-more-multiply-verify.wvr.c [2023-11-06 22:50:20,150 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:50:20,365 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:50:20,365 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/sv-benchmarks/c/weaver/popl20-more-multiply-verify.wvr.c [2023-11-06 22:50:20,374 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/data/dd9b21b3c/51d144c673af4841a512783e72dc5026/FLAGcbd2a171e [2023-11-06 22:50:20,389 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/data/dd9b21b3c/51d144c673af4841a512783e72dc5026 [2023-11-06 22:50:20,392 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:50:20,393 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:50:20,396 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:50:20,396 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:50:20,406 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:50:20,407 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:50:20" (1/1) ... [2023-11-06 22:50:20,408 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10326d61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:50:20, skipping insertion in model container [2023-11-06 22:50:20,408 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:50:20" (1/1) ... [2023-11-06 22:50:20,446 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:50:20,652 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_fd6dc348-9ae8-454c-a84b-47bc50aae420/sv-benchmarks/c/weaver/popl20-more-multiply-verify.wvr.c[3042,3055] [2023-11-06 22:50:20,665 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:50:20,685 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:50:20,714 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_fd6dc348-9ae8-454c-a84b-47bc50aae420/sv-benchmarks/c/weaver/popl20-more-multiply-verify.wvr.c[3042,3055] [2023-11-06 22:50:20,718 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:50:20,727 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:50:20,728 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:50:20,734 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:50:20,735 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:50:20 WrapperNode [2023-11-06 22:50:20,735 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:50:20,736 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:50:20,737 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:50:20,737 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:50:20,745 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:50:20" (1/1) ... [2023-11-06 22:50:20,755 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:50:20" (1/1) ... [2023-11-06 22:50:20,786 INFO L138 Inliner]: procedures = 26, calls = 50, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 186 [2023-11-06 22:50:20,787 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:50:20,788 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:50:20,788 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:50:20,788 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:50:20,797 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:50:20" (1/1) ... [2023-11-06 22:50:20,797 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:50:20" (1/1) ... [2023-11-06 22:50:20,801 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:50:20" (1/1) ... [2023-11-06 22:50:20,802 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:50:20" (1/1) ... [2023-11-06 22:50:20,812 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:50:20" (1/1) ... [2023-11-06 22:50:20,816 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:50:20" (1/1) ... [2023-11-06 22:50:20,819 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:50:20" (1/1) ... [2023-11-06 22:50:20,821 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:50:20" (1/1) ... [2023-11-06 22:50:20,825 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:50:20,826 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:50:20,826 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:50:20,826 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:50:20,827 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:50:20" (1/1) ... [2023-11-06 22:50:20,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:50:20,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:50:20,868 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:50:20,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:50:20,954 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:50:20,954 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:50:20,954 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 22:50:20,955 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 22:50:20,955 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-06 22:50:20,955 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-06 22:50:20,955 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-06 22:50:20,955 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-06 22:50:20,956 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-06 22:50:20,956 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-06 22:50:20,956 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:50:20,958 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-06 22:50:20,959 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-06 22:50:20,960 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 22:50:20,960 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:50:20,960 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:50:20,961 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:50:20,962 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 22:50:21,123 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:50:21,126 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:50:21,499 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:50:21,695 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:50:21,696 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-06 22:50:21,698 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:50:21 BoogieIcfgContainer [2023-11-06 22:50:21,699 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:50:21,701 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:50:21,701 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:50:21,705 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:50:21,706 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:50:20" (1/3) ... [2023-11-06 22:50:21,707 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c24b5b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:50:21, skipping insertion in model container [2023-11-06 22:50:21,707 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:50:20" (2/3) ... [2023-11-06 22:50:21,707 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c24b5b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:50:21, skipping insertion in model container [2023-11-06 22:50:21,708 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:50:21" (3/3) ... [2023-11-06 22:50:21,709 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-multiply-verify.wvr.c [2023-11-06 22:50:21,719 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-06 22:50:21,731 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:50:21,731 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:50:21,732 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 22:50:21,865 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-06 22:50:21,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 159 places, 158 transitions, 337 flow [2023-11-06 22:50:22,050 INFO L124 PetriNetUnfolderBase]: 9/155 cut-off events. [2023-11-06 22:50:22,050 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 22:50:22,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168 conditions, 155 events. 9/155 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 97 event pairs, 0 based on Foata normal form. 0/145 useless extension candidates. Maximal degree in co-relation 119. Up to 2 conditions per place. [2023-11-06 22:50:22,058 INFO L82 GeneralOperation]: Start removeDead. Operand has 159 places, 158 transitions, 337 flow [2023-11-06 22:50:22,069 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 145 places, 144 transitions, 306 flow [2023-11-06 22:50:22,073 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:50:22,086 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 145 places, 144 transitions, 306 flow [2023-11-06 22:50:22,089 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 145 places, 144 transitions, 306 flow [2023-11-06 22:50:22,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 145 places, 144 transitions, 306 flow [2023-11-06 22:50:22,138 INFO L124 PetriNetUnfolderBase]: 9/144 cut-off events. [2023-11-06 22:50:22,138 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 22:50:22,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157 conditions, 144 events. 9/144 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 96 event pairs, 0 based on Foata normal form. 0/135 useless extension candidates. Maximal degree in co-relation 119. Up to 2 conditions per place. [2023-11-06 22:50:22,143 INFO L119 LiptonReduction]: Number of co-enabled transitions 1600 [2023-11-06 22:50:28,249 INFO L134 LiptonReduction]: Checked pairs total: 1571 [2023-11-06 22:50:28,250 INFO L136 LiptonReduction]: Total number of compositions: 138 [2023-11-06 22:50:28,284 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:50:28,297 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;@47e52a99, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:50:28,298 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-06 22:50:28,316 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:50:28,316 INFO L124 PetriNetUnfolderBase]: 3/21 cut-off events. [2023-11-06 22:50:28,316 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 22:50:28,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:50:28,317 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 22:50:28,318 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 22:50:28,323 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:50:28,323 INFO L85 PathProgramCache]: Analyzing trace with hash 730141643, now seen corresponding path program 1 times [2023-11-06 22:50:28,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:50:28,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184396278] [2023-11-06 22:50:28,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:50:28,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:50:28,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:50:28,785 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 22:50:28,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:50:28,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184396278] [2023-11-06 22:50:28,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184396278] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:50:28,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:50:28,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:50:28,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035931077] [2023-11-06 22:50:28,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:50:28,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:50:28,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:50:28,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:50:28,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:50:28,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 296 [2023-11-06 22:50:28,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 22 transitions, 62 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 22:50:28,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:50:28,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 296 [2023-11-06 22:50:28,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:50:29,016 INFO L124 PetriNetUnfolderBase]: 108/180 cut-off events. [2023-11-06 22:50:29,017 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2023-11-06 22:50:29,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 400 conditions, 180 events. 108/180 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 416 event pairs, 29 based on Foata normal form. 8/153 useless extension candidates. Maximal degree in co-relation 300. Up to 125 conditions per place. [2023-11-06 22:50:29,023 INFO L140 encePairwiseOnDemand]: 292/296 looper letters, 30 selfloop transitions, 3 changer transitions 0/33 dead transitions. [2023-11-06 22:50:29,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 33 transitions, 156 flow [2023-11-06 22:50:29,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:50:29,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:50:29,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 448 transitions. [2023-11-06 22:50:29,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5045045045045045 [2023-11-06 22:50:29,055 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 448 transitions. [2023-11-06 22:50:29,056 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 448 transitions. [2023-11-06 22:50:29,061 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:50:29,064 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 448 transitions. [2023-11-06 22:50:29,070 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 22:50:29,079 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 296.0) internal successors, (1184), 4 states have internal predecessors, (1184), 0 states have call successors, (0), 0 states 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 22:50:29,081 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 296.0) internal successors, (1184), 4 states have internal predecessors, (1184), 0 states have call successors, (0), 0 states 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 22:50:29,083 INFO L175 Difference]: Start difference. First operand has 29 places, 22 transitions, 62 flow. Second operand 3 states and 448 transitions. [2023-11-06 22:50:29,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 33 transitions, 156 flow [2023-11-06 22:50:29,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 33 transitions, 140 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-06 22:50:29,090 INFO L231 Difference]: Finished difference. Result has 26 places, 24 transitions, 69 flow [2023-11-06 22:50:29,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=69, PETRI_PLACES=26, PETRI_TRANSITIONS=24} [2023-11-06 22:50:29,096 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -3 predicate places. [2023-11-06 22:50:29,096 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 24 transitions, 69 flow [2023-11-06 22:50:29,097 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 22:50:29,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:50:29,098 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 22:50:29,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:50:29,099 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 22:50:29,100 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:50:29,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1187048435, now seen corresponding path program 2 times [2023-11-06 22:50:29,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:50:29,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436187726] [2023-11-06 22:50:29,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:50:29,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:50:29,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:50:29,625 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 22:50:29,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:50:29,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436187726] [2023-11-06 22:50:29,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436187726] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:50:29,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:50:29,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:50:29,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988070682] [2023-11-06 22:50:29,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:50:29,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:50:29,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:50:29,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:50:29,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:50:29,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 296 [2023-11-06 22:50:29,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 24 transitions, 69 flow. Second operand has 5 states, 5 states have (on average 135.8) internal successors, (679), 5 states have internal predecessors, (679), 0 states have call successors, (0), 0 states 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 22:50:29,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:50:29,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 296 [2023-11-06 22:50:29,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:50:29,849 INFO L124 PetriNetUnfolderBase]: 141/235 cut-off events. [2023-11-06 22:50:29,849 INFO L125 PetriNetUnfolderBase]: For 49/49 co-relation queries the response was YES. [2023-11-06 22:50:29,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 565 conditions, 235 events. 141/235 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 553 event pairs, 82 based on Foata normal form. 18/251 useless extension candidates. Maximal degree in co-relation 234. Up to 181 conditions per place. [2023-11-06 22:50:29,852 INFO L140 encePairwiseOnDemand]: 291/296 looper letters, 23 selfloop transitions, 2 changer transitions 11/36 dead transitions. [2023-11-06 22:50:29,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 36 transitions, 168 flow [2023-11-06 22:50:29,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:50:29,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:50:29,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 564 transitions. [2023-11-06 22:50:29,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47635135135135137 [2023-11-06 22:50:29,856 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 564 transitions. [2023-11-06 22:50:29,856 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 564 transitions. [2023-11-06 22:50:29,856 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:50:29,857 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 564 transitions. [2023-11-06 22:50:29,859 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 141.0) internal successors, (564), 4 states have internal predecessors, (564), 0 states have call successors, (0), 0 states 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 22:50:29,862 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 296.0) internal successors, (1480), 5 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states 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 22:50:29,864 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 296.0) internal successors, (1480), 5 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states 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 22:50:29,864 INFO L175 Difference]: Start difference. First operand has 26 places, 24 transitions, 69 flow. Second operand 4 states and 564 transitions. [2023-11-06 22:50:29,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 36 transitions, 168 flow [2023-11-06 22:50:29,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 36 transitions, 165 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:50:29,866 INFO L231 Difference]: Finished difference. Result has 30 places, 25 transitions, 82 flow [2023-11-06 22:50:29,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=82, PETRI_PLACES=30, PETRI_TRANSITIONS=25} [2023-11-06 22:50:29,868 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 1 predicate places. [2023-11-06 22:50:29,868 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 25 transitions, 82 flow [2023-11-06 22:50:29,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 135.8) internal successors, (679), 5 states have internal predecessors, (679), 0 states have call successors, (0), 0 states 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 22:50:29,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:50:29,869 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:50:29,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 22:50:29,870 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 22:50:29,870 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:50:29,870 INFO L85 PathProgramCache]: Analyzing trace with hash 536750914, now seen corresponding path program 1 times [2023-11-06 22:50:29,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:50:29,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674064724] [2023-11-06 22:50:29,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:50:29,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:50:29,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:50:30,115 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:50:30,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:50:30,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674064724] [2023-11-06 22:50:30,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674064724] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:50:30,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120229674] [2023-11-06 22:50:30,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:50:30,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:50:30,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:50:30,127 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:50:30,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:50:30,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:50:30,267 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:50:30,273 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:50:30,389 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:50:30,390 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:50:30,518 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:50:30,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120229674] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:50:30,519 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:50:30,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-06 22:50:30,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127686352] [2023-11-06 22:50:30,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:50:30,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:50:30,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:50:30,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:50:30,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:50:30,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 296 [2023-11-06 22:50:30,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 25 transitions, 82 flow. Second operand has 12 states, 12 states have (on average 133.33333333333334) internal successors, (1600), 12 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states 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 22:50:30,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:50:30,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 296 [2023-11-06 22:50:30,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:50:30,891 INFO L124 PetriNetUnfolderBase]: 175/292 cut-off events. [2023-11-06 22:50:30,891 INFO L125 PetriNetUnfolderBase]: For 117/117 co-relation queries the response was YES. [2023-11-06 22:50:30,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 729 conditions, 292 events. 175/292 cut-off events. For 117/117 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 800 event pairs, 82 based on Foata normal form. 22/312 useless extension candidates. Maximal degree in co-relation 715. Up to 181 conditions per place. [2023-11-06 22:50:30,894 INFO L140 encePairwiseOnDemand]: 290/296 looper letters, 23 selfloop transitions, 3 changer transitions 24/50 dead transitions. [2023-11-06 22:50:30,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 50 transitions, 250 flow [2023-11-06 22:50:30,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:50:30,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:50:30,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 831 transitions. [2023-11-06 22:50:30,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46790540540540543 [2023-11-06 22:50:30,920 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 831 transitions. [2023-11-06 22:50:30,920 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 831 transitions. [2023-11-06 22:50:30,921 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:50:30,921 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 831 transitions. [2023-11-06 22:50:30,930 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 138.5) internal successors, (831), 6 states have internal predecessors, (831), 0 states have call successors, (0), 0 states 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 22:50:30,935 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 296.0) internal successors, (2072), 7 states have internal predecessors, (2072), 0 states have call successors, (0), 0 states 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 22:50:30,936 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 296.0) internal successors, (2072), 7 states have internal predecessors, (2072), 0 states have call successors, (0), 0 states 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 22:50:30,937 INFO L175 Difference]: Start difference. First operand has 30 places, 25 transitions, 82 flow. Second operand 6 states and 831 transitions. [2023-11-06 22:50:30,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 50 transitions, 250 flow [2023-11-06 22:50:30,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 50 transitions, 238 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-11-06 22:50:30,939 INFO L231 Difference]: Finished difference. Result has 35 places, 26 transitions, 100 flow [2023-11-06 22:50:30,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=100, PETRI_PLACES=35, PETRI_TRANSITIONS=26} [2023-11-06 22:50:30,941 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 6 predicate places. [2023-11-06 22:50:30,941 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 26 transitions, 100 flow [2023-11-06 22:50:30,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 133.33333333333334) internal successors, (1600), 12 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states 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 22:50:30,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:50:30,943 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] [2023-11-06 22:50:30,954 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:50:31,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:50:31,149 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 22:50:31,149 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:50:31,150 INFO L85 PathProgramCache]: Analyzing trace with hash -849472919, now seen corresponding path program 2 times [2023-11-06 22:50:31,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:50:31,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117416247] [2023-11-06 22:50:31,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:50:31,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:50:31,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:50:33,388 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 22:50:33,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:50:33,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117416247] [2023-11-06 22:50:33,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117416247] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:50:33,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975352614] [2023-11-06 22:50:33,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:50:33,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:50:33,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:50:33,393 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:50:33,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:50:33,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-06 22:50:33,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:50:33,557 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-06 22:50:33,561 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:50:33,599 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 312 treesize of output 296 [2023-11-06 22:50:33,802 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 23 treesize of output 18 [2023-11-06 22:50:34,034 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:50:34,034 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:50:34,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975352614] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:50:34,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:50:34,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 18 [2023-11-06 22:50:34,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047377298] [2023-11-06 22:50:34,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:50:34,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:50:34,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:50:34,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:50:34,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2023-11-06 22:50:34,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 296 [2023-11-06 22:50:34,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 26 transitions, 100 flow. Second operand has 10 states, 10 states have (on average 121.0) internal successors, (1210), 10 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states 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 22:50:34,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:50:34,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 296 [2023-11-06 22:50:34,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:50:34,868 INFO L124 PetriNetUnfolderBase]: 169/288 cut-off events. [2023-11-06 22:50:34,868 INFO L125 PetriNetUnfolderBase]: For 180/180 co-relation queries the response was YES. [2023-11-06 22:50:34,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 784 conditions, 288 events. 169/288 cut-off events. For 180/180 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 855 event pairs, 32 based on Foata normal form. 13/300 useless extension candidates. Maximal degree in co-relation 763. Up to 137 conditions per place. [2023-11-06 22:50:34,871 INFO L140 encePairwiseOnDemand]: 284/296 looper letters, 49 selfloop transitions, 14 changer transitions 13/76 dead transitions. [2023-11-06 22:50:34,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 76 transitions, 387 flow [2023-11-06 22:50:34,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:50:34,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-06 22:50:34,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1148 transitions. [2023-11-06 22:50:34,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43093093093093093 [2023-11-06 22:50:34,881 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1148 transitions. [2023-11-06 22:50:34,881 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1148 transitions. [2023-11-06 22:50:34,882 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:50:34,883 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1148 transitions. [2023-11-06 22:50:34,887 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 127.55555555555556) internal successors, (1148), 9 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states 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 22:50:34,893 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 296.0) internal successors, (2960), 10 states have internal predecessors, (2960), 0 states have call successors, (0), 0 states 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 22:50:34,899 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 296.0) internal successors, (2960), 10 states have internal predecessors, (2960), 0 states have call successors, (0), 0 states 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 22:50:34,900 INFO L175 Difference]: Start difference. First operand has 35 places, 26 transitions, 100 flow. Second operand 9 states and 1148 transitions. [2023-11-06 22:50:34,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 76 transitions, 387 flow [2023-11-06 22:50:34,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 76 transitions, 359 flow, removed 12 selfloop flow, removed 4 redundant places. [2023-11-06 22:50:34,907 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 179 flow [2023-11-06 22:50:34,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=179, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2023-11-06 22:50:34,909 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 14 predicate places. [2023-11-06 22:50:34,910 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 179 flow [2023-11-06 22:50:34,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 121.0) internal successors, (1210), 10 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states 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 22:50:34,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:50:34,911 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] [2023-11-06 22:50:34,921 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:50:35,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:50:35,117 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 22:50:35,118 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:50:35,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1408807499, now seen corresponding path program 3 times [2023-11-06 22:50:35,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:50:35,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305588895] [2023-11-06 22:50:35,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:50:35,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:50:35,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:50:37,277 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 22:50:37,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:50:37,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305588895] [2023-11-06 22:50:37,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305588895] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:50:37,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464183133] [2023-11-06 22:50:37,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:50:37,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:50:37,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:50:37,288 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:50:37,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:50:37,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-06 22:50:37,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:50:37,462 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-06 22:50:37,465 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:50:37,713 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:50:37,713 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:50:37,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464183133] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:50:37,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:50:37,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 17 [2023-11-06 22:50:37,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518137215] [2023-11-06 22:50:37,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:50:37,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:50:37,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:50:37,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:50:37,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2023-11-06 22:50:37,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 296 [2023-11-06 22:50:37,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 179 flow. Second operand has 8 states, 8 states have (on average 128.5) internal successors, (1028), 8 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states 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 22:50:37,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:50:37,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 296 [2023-11-06 22:50:37,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:50:38,245 INFO L124 PetriNetUnfolderBase]: 245/402 cut-off events. [2023-11-06 22:50:38,245 INFO L125 PetriNetUnfolderBase]: For 610/610 co-relation queries the response was YES. [2023-11-06 22:50:38,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1439 conditions, 402 events. 245/402 cut-off events. For 610/610 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1271 event pairs, 53 based on Foata normal form. 5/407 useless extension candidates. Maximal degree in co-relation 1424. Up to 215 conditions per place. [2023-11-06 22:50:38,250 INFO L140 encePairwiseOnDemand]: 286/296 looper letters, 52 selfloop transitions, 21 changer transitions 13/86 dead transitions. [2023-11-06 22:50:38,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 86 transitions, 552 flow [2023-11-06 22:50:38,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:50:38,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-06 22:50:38,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1082 transitions. [2023-11-06 22:50:38,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45692567567567566 [2023-11-06 22:50:38,256 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1082 transitions. [2023-11-06 22:50:38,256 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1082 transitions. [2023-11-06 22:50:38,257 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:50:38,257 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1082 transitions. [2023-11-06 22:50:38,260 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 135.25) internal successors, (1082), 8 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states 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 22:50:38,265 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 296.0) internal successors, (2664), 9 states have internal predecessors, (2664), 0 states have call successors, (0), 0 states 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 22:50:38,269 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 296.0) internal successors, (2664), 9 states have internal predecessors, (2664), 0 states have call successors, (0), 0 states 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 22:50:38,269 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 179 flow. Second operand 8 states and 1082 transitions. [2023-11-06 22:50:38,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 86 transitions, 552 flow [2023-11-06 22:50:38,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 86 transitions, 523 flow, removed 8 selfloop flow, removed 3 redundant places. [2023-11-06 22:50:38,276 INFO L231 Difference]: Finished difference. Result has 52 places, 53 transitions, 344 flow [2023-11-06 22:50:38,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=344, PETRI_PLACES=52, PETRI_TRANSITIONS=53} [2023-11-06 22:50:38,279 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 23 predicate places. [2023-11-06 22:50:38,280 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 53 transitions, 344 flow [2023-11-06 22:50:38,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 128.5) internal successors, (1028), 8 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states 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 22:50:38,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:50:38,281 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] [2023-11-06 22:50:38,291 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:50:38,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:50:38,492 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 22:50:38,493 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:50:38,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1453204137, now seen corresponding path program 4 times [2023-11-06 22:50:38,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:50:38,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012897179] [2023-11-06 22:50:38,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:50:38,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:50:38,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:50:39,765 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 22:50:39,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:50:39,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012897179] [2023-11-06 22:50:39,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012897179] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:50:39,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813203630] [2023-11-06 22:50:39,766 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:50:39,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:50:39,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:50:39,768 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:50:39,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:50:39,896 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:50:39,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:50:39,898 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-06 22:50:39,902 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:50:39,919 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 436 treesize of output 420 [2023-11-06 22:50:40,484 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 35 treesize of output 28 [2023-11-06 22:50:40,738 INFO L322 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2023-11-06 22:50:40,738 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 71 treesize of output 41 [2023-11-06 22:50:40,789 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 22:50:40,790 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:50:41,414 INFO L322 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-11-06 22:50:41,415 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 84 treesize of output 87 [2023-11-06 22:50:41,428 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:50:41,429 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 20 treesize of output 7 [2023-11-06 22:50:42,586 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 22:50:42,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813203630] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:50:42,587 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:50:42,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-11-06 22:50:42,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894708209] [2023-11-06 22:50:42,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:50:42,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-06 22:50:42,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:50:42,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-06 22:50:42,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=857, Unknown=1, NotChecked=0, Total=992 [2023-11-06 22:50:45,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 296 [2023-11-06 22:50:45,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 53 transitions, 344 flow. Second operand has 32 states, 32 states have (on average 97.96875) internal successors, (3135), 32 states have internal predecessors, (3135), 0 states have call successors, (0), 0 states 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 22:50:45,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:50:45,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 296 [2023-11-06 22:50:45,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:50:50,152 INFO L124 PetriNetUnfolderBase]: 598/1061 cut-off events. [2023-11-06 22:50:50,153 INFO L125 PetriNetUnfolderBase]: For 2896/2896 co-relation queries the response was YES. [2023-11-06 22:50:50,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4532 conditions, 1061 events. 598/1061 cut-off events. For 2896/2896 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 4978 event pairs, 119 based on Foata normal form. 1/1062 useless extension candidates. Maximal degree in co-relation 4487. Up to 389 conditions per place. [2023-11-06 22:50:50,169 INFO L140 encePairwiseOnDemand]: 284/296 looper letters, 205 selfloop transitions, 57 changer transitions 15/277 dead transitions. [2023-11-06 22:50:50,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 277 transitions, 1946 flow [2023-11-06 22:50:50,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-06 22:50:50,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-11-06 22:50:50,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2916 transitions. [2023-11-06 22:50:50,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3518339768339768 [2023-11-06 22:50:50,186 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2916 transitions. [2023-11-06 22:50:50,186 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2916 transitions. [2023-11-06 22:50:50,189 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:50:50,190 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2916 transitions. [2023-11-06 22:50:50,201 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 104.14285714285714) internal successors, (2916), 28 states have internal predecessors, (2916), 0 states have call successors, (0), 0 states 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 22:50:50,220 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 296.0) internal successors, (8584), 29 states have internal predecessors, (8584), 0 states have call successors, (0), 0 states 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 22:50:50,224 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 296.0) internal successors, (8584), 29 states have internal predecessors, (8584), 0 states have call successors, (0), 0 states 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 22:50:50,224 INFO L175 Difference]: Start difference. First operand has 52 places, 53 transitions, 344 flow. Second operand 28 states and 2916 transitions. [2023-11-06 22:50:50,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 277 transitions, 1946 flow [2023-11-06 22:50:50,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 277 transitions, 1876 flow, removed 35 selfloop flow, removed 1 redundant places. [2023-11-06 22:50:50,246 INFO L231 Difference]: Finished difference. Result has 89 places, 109 transitions, 1028 flow [2023-11-06 22:50:50,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=1028, PETRI_PLACES=89, PETRI_TRANSITIONS=109} [2023-11-06 22:50:50,249 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 60 predicate places. [2023-11-06 22:50:50,250 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 109 transitions, 1028 flow [2023-11-06 22:50:50,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 97.96875) internal successors, (3135), 32 states have internal predecessors, (3135), 0 states have call successors, (0), 0 states 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 22:50:50,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:50:50,256 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] [2023-11-06 22:50:50,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:50:50,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-06 22:50:50,463 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 22:50:50,463 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:50:50,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1960775735, now seen corresponding path program 5 times [2023-11-06 22:50:50,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:50:50,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653589363] [2023-11-06 22:50:50,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:50:50,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:50:50,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:50:51,970 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 22:50:51,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:50:51,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653589363] [2023-11-06 22:50:51,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653589363] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:50:51,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407670893] [2023-11-06 22:50:51,974 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:50:51,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:50:51,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:50:51,975 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:50:52,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:50:52,097 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:50:52,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:50:52,099 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-06 22:50:52,102 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:50:52,551 INFO L322 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2023-11-06 22:50:52,551 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 71 treesize of output 41 [2023-11-06 22:50:52,582 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 22:50:52,582 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:50:52,966 INFO L322 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-11-06 22:50:52,966 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 57 treesize of output 60 [2023-11-06 22:50:53,783 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 22:50:53,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407670893] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:50:53,784 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:50:53,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 28 [2023-11-06 22:50:53,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303873077] [2023-11-06 22:50:53,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:50:53,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-06 22:50:53,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:50:53,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-06 22:50:53,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=717, Unknown=0, NotChecked=0, Total=870 [2023-11-06 22:50:55,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 296 [2023-11-06 22:50:55,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 109 transitions, 1028 flow. Second operand has 30 states, 30 states have (on average 117.1) internal successors, (3513), 30 states have internal predecessors, (3513), 0 states have call successors, (0), 0 states 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 22:50:55,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:50:55,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 296 [2023-11-06 22:50:55,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:50:58,525 INFO L124 PetriNetUnfolderBase]: 799/1497 cut-off events. [2023-11-06 22:50:58,526 INFO L125 PetriNetUnfolderBase]: For 9314/9314 co-relation queries the response was YES. [2023-11-06 22:50:58,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7807 conditions, 1497 events. 799/1497 cut-off events. For 9314/9314 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 8217 event pairs, 142 based on Foata normal form. 1/1498 useless extension candidates. Maximal degree in co-relation 7726. Up to 418 conditions per place. [2023-11-06 22:50:58,544 INFO L140 encePairwiseOnDemand]: 283/296 looper letters, 186 selfloop transitions, 108 changer transitions 14/308 dead transitions. [2023-11-06 22:50:58,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 308 transitions, 2834 flow [2023-11-06 22:50:58,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-06 22:50:58,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-06 22:50:58,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2864 transitions. [2023-11-06 22:50:58,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4206815511163337 [2023-11-06 22:50:58,568 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2864 transitions. [2023-11-06 22:50:58,568 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2864 transitions. [2023-11-06 22:50:58,571 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:50:58,571 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2864 transitions. [2023-11-06 22:50:58,580 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 124.52173913043478) internal successors, (2864), 23 states have internal predecessors, (2864), 0 states have call successors, (0), 0 states 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 22:50:58,592 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 296.0) internal successors, (7104), 24 states have internal predecessors, (7104), 0 states have call successors, (0), 0 states 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 22:50:58,595 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 296.0) internal successors, (7104), 24 states have internal predecessors, (7104), 0 states have call successors, (0), 0 states 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 22:50:58,595 INFO L175 Difference]: Start difference. First operand has 89 places, 109 transitions, 1028 flow. Second operand 23 states and 2864 transitions. [2023-11-06 22:50:58,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 308 transitions, 2834 flow [2023-11-06 22:50:58,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 308 transitions, 2552 flow, removed 139 selfloop flow, removed 3 redundant places. [2023-11-06 22:50:58,677 INFO L231 Difference]: Finished difference. Result has 119 places, 175 transitions, 1935 flow [2023-11-06 22:50:58,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=894, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1935, PETRI_PLACES=119, PETRI_TRANSITIONS=175} [2023-11-06 22:50:58,680 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 90 predicate places. [2023-11-06 22:50:58,680 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 175 transitions, 1935 flow [2023-11-06 22:50:58,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 117.1) internal successors, (3513), 30 states have internal predecessors, (3513), 0 states have call successors, (0), 0 states 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 22:50:58,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:50:58,682 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:50:58,688 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-06 22:50:58,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-06 22:50:58,888 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 22:50:58,888 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:50:58,888 INFO L85 PathProgramCache]: Analyzing trace with hash 592806899, now seen corresponding path program 6 times [2023-11-06 22:50:58,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:50:58,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804565732] [2023-11-06 22:50:58,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:50:58,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:50:58,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:51:00,202 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 22:51:00,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:51:00,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804565732] [2023-11-06 22:51:00,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804565732] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:51:00,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271202758] [2023-11-06 22:51:00,203 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:51:00,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:51:00,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:51:00,204 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:51:00,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:51:00,371 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-11-06 22:51:00,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:51:00,373 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-06 22:51:00,376 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:51:00,382 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 60 treesize of output 58 [2023-11-06 22:51:00,614 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 36 treesize of output 29 [2023-11-06 22:51:00,729 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:51:00,729 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:51:00,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271202758] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:51:00,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:51:00,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 18 [2023-11-06 22:51:00,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127856560] [2023-11-06 22:51:00,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:51:00,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:51:00,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:51:00,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:51:00,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2023-11-06 22:51:01,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 296 [2023-11-06 22:51:01,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 175 transitions, 1935 flow. Second operand has 10 states, 10 states have (on average 121.0) internal successors, (1210), 10 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states 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 22:51:01,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:51:01,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 296 [2023-11-06 22:51:01,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:51:01,701 INFO L124 PetriNetUnfolderBase]: 795/1510 cut-off events. [2023-11-06 22:51:01,702 INFO L125 PetriNetUnfolderBase]: For 13469/13469 co-relation queries the response was YES. [2023-11-06 22:51:01,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8798 conditions, 1510 events. 795/1510 cut-off events. For 13469/13469 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 8417 event pairs, 179 based on Foata normal form. 7/1517 useless extension candidates. Maximal degree in co-relation 8707. Up to 996 conditions per place. [2023-11-06 22:51:01,755 INFO L140 encePairwiseOnDemand]: 285/296 looper letters, 150 selfloop transitions, 50 changer transitions 21/221 dead transitions. [2023-11-06 22:51:01,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 221 transitions, 2733 flow [2023-11-06 22:51:01,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:51:01,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-06 22:51:01,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1149 transitions. [2023-11-06 22:51:01,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4313063063063063 [2023-11-06 22:51:01,761 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1149 transitions. [2023-11-06 22:51:01,761 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1149 transitions. [2023-11-06 22:51:01,762 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:51:01,762 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1149 transitions. [2023-11-06 22:51:01,765 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 127.66666666666667) internal successors, (1149), 9 states have internal predecessors, (1149), 0 states have call successors, (0), 0 states 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 22:51:01,779 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 296.0) internal successors, (2960), 10 states have internal predecessors, (2960), 0 states have call successors, (0), 0 states 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 22:51:01,789 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 296.0) internal successors, (2960), 10 states have internal predecessors, (2960), 0 states have call successors, (0), 0 states 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 22:51:01,789 INFO L175 Difference]: Start difference. First operand has 119 places, 175 transitions, 1935 flow. Second operand 9 states and 1149 transitions. [2023-11-06 22:51:01,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 221 transitions, 2733 flow [2023-11-06 22:51:01,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 221 transitions, 2586 flow, removed 67 selfloop flow, removed 5 redundant places. [2023-11-06 22:51:01,877 INFO L231 Difference]: Finished difference. Result has 125 places, 173 transitions, 1956 flow [2023-11-06 22:51:01,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=1790, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1956, PETRI_PLACES=125, PETRI_TRANSITIONS=173} [2023-11-06 22:51:01,880 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 96 predicate places. [2023-11-06 22:51:01,880 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 173 transitions, 1956 flow [2023-11-06 22:51:01,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 121.0) internal successors, (1210), 10 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states 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 22:51:01,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:51:01,881 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] [2023-11-06 22:51:01,892 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 22:51:02,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:51:02,088 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 22:51:02,088 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:51:02,089 INFO L85 PathProgramCache]: Analyzing trace with hash 514705555, now seen corresponding path program 7 times [2023-11-06 22:51:02,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:51:02,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047812203] [2023-11-06 22:51:02,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:51:02,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:51:02,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:51:03,259 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 22:51:03,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:51:03,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047812203] [2023-11-06 22:51:03,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047812203] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:51:03,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536759274] [2023-11-06 22:51:03,260 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:51:03,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:51:03,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:51:03,262 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:51:03,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 22:51:03,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:51:03,393 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-06 22:51:03,402 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:51:03,415 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 500 treesize of output 484 [2023-11-06 22:51:03,752 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 22 treesize of output 17 [2023-11-06 22:51:03,960 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 22:51:03,960 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:51:04,433 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:51:04,434 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 112 treesize of output 114 [2023-11-06 22:51:04,469 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:51:04,469 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 56 [2023-11-06 22:51:05,252 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 22:51:05,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536759274] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:51:05,252 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:51:05,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-11-06 22:51:05,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960186568] [2023-11-06 22:51:05,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:51:05,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-06 22:51:05,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:51:05,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-06 22:51:05,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=854, Unknown=1, NotChecked=0, Total=992 [2023-11-06 22:51:07,436 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 22:51:09,910 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:51:10,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 296 [2023-11-06 22:51:10,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 173 transitions, 1956 flow. Second operand has 32 states, 32 states have (on average 97.96875) internal successors, (3135), 32 states have internal predecessors, (3135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:51:10,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:51:10,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 296 [2023-11-06 22:51:10,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:51:18,970 WARN L539 Checker$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 22:51:20,507 INFO L124 PetriNetUnfolderBase]: 1003/1841 cut-off events. [2023-11-06 22:51:20,507 INFO L125 PetriNetUnfolderBase]: For 16249/16249 co-relation queries the response was YES. [2023-11-06 22:51:20,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11119 conditions, 1841 events. 1003/1841 cut-off events. For 16249/16249 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 10404 event pairs, 173 based on Foata normal form. 7/1848 useless extension candidates. Maximal degree in co-relation 11015. Up to 454 conditions per place. [2023-11-06 22:51:20,530 INFO L140 encePairwiseOnDemand]: 283/296 looper letters, 234 selfloop transitions, 127 changer transitions 43/404 dead transitions. [2023-11-06 22:51:20,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 404 transitions, 4248 flow [2023-11-06 22:51:20,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-06 22:51:20,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-11-06 22:51:20,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 3851 transitions. [2023-11-06 22:51:20,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3516252739225712 [2023-11-06 22:51:20,545 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 3851 transitions. [2023-11-06 22:51:20,545 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 3851 transitions. [2023-11-06 22:51:20,547 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:51:20,548 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 3851 transitions. [2023-11-06 22:51:20,556 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 104.08108108108108) internal successors, (3851), 37 states have internal predecessors, (3851), 0 states have call successors, (0), 0 states 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 22:51:20,573 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 296.0) internal successors, (11248), 38 states have internal predecessors, (11248), 0 states have call successors, (0), 0 states 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 22:51:20,576 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 296.0) internal successors, (11248), 38 states have internal predecessors, (11248), 0 states have call successors, (0), 0 states 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 22:51:20,576 INFO L175 Difference]: Start difference. First operand has 125 places, 173 transitions, 1956 flow. Second operand 37 states and 3851 transitions. [2023-11-06 22:51:20,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 404 transitions, 4248 flow [2023-11-06 22:51:20,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 404 transitions, 4088 flow, removed 26 selfloop flow, removed 6 redundant places. [2023-11-06 22:51:20,678 INFO L231 Difference]: Finished difference. Result has 166 places, 210 transitions, 2661 flow [2023-11-06 22:51:20,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=1848, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=2661, PETRI_PLACES=166, PETRI_TRANSITIONS=210} [2023-11-06 22:51:20,681 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 137 predicate places. [2023-11-06 22:51:20,682 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 210 transitions, 2661 flow [2023-11-06 22:51:20,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 97.96875) internal successors, (3135), 32 states have internal predecessors, (3135), 0 states have call successors, (0), 0 states 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 22:51:20,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:51:20,683 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] [2023-11-06 22:51:20,690 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 22:51:20,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:51:20,890 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 22:51:20,890 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:51:20,891 INFO L85 PathProgramCache]: Analyzing trace with hash 192910983, now seen corresponding path program 8 times [2023-11-06 22:51:20,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:51:20,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818641797] [2023-11-06 22:51:20,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:51:20,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:51:20,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:51:23,519 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 22:51:23,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:51:23,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818641797] [2023-11-06 22:51:23,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818641797] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:51:23,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540419736] [2023-11-06 22:51:23,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:51:23,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:51:23,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:51:23,522 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:51:23,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 22:51:23,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-06 22:51:23,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:51:23,688 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-06 22:51:23,690 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:51:23,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:51:23,910 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 23 treesize of output 18 [2023-11-06 22:51:23,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:51:23,984 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 23 treesize of output 18 [2023-11-06 22:51:24,207 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:51:24,208 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:51:24,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540419736] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:51:24,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:51:24,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 19 [2023-11-06 22:51:24,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665055224] [2023-11-06 22:51:24,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:51:24,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-06 22:51:24,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:51:24,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-06 22:51:24,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2023-11-06 22:51:24,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 296 [2023-11-06 22:51:24,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 210 transitions, 2661 flow. Second operand has 11 states, 11 states have (on average 118.81818181818181) internal successors, (1307), 11 states have internal predecessors, (1307), 0 states have call successors, (0), 0 states 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 22:51:24,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:51:24,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 296 [2023-11-06 22:51:24,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:51:25,464 INFO L124 PetriNetUnfolderBase]: 966/1750 cut-off events. [2023-11-06 22:51:25,464 INFO L125 PetriNetUnfolderBase]: For 18949/18949 co-relation queries the response was YES. [2023-11-06 22:51:25,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11371 conditions, 1750 events. 966/1750 cut-off events. For 18949/18949 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 9663 event pairs, 168 based on Foata normal form. 26/1776 useless extension candidates. Maximal degree in co-relation 11253. Up to 1024 conditions per place. [2023-11-06 22:51:25,488 INFO L140 encePairwiseOnDemand]: 285/296 looper letters, 157 selfloop transitions, 75 changer transitions 14/246 dead transitions. [2023-11-06 22:51:25,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 246 transitions, 3397 flow [2023-11-06 22:51:25,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:51:25,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-06 22:51:25,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1130 transitions. [2023-11-06 22:51:25,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4241741741741742 [2023-11-06 22:51:25,491 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1130 transitions. [2023-11-06 22:51:25,491 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1130 transitions. [2023-11-06 22:51:25,492 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:51:25,492 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1130 transitions. [2023-11-06 22:51:25,494 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 125.55555555555556) internal successors, (1130), 9 states have internal predecessors, (1130), 0 states have call successors, (0), 0 states 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 22:51:25,497 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 296.0) internal successors, (2960), 10 states have internal predecessors, (2960), 0 states have call successors, (0), 0 states 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 22:51:25,498 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 296.0) internal successors, (2960), 10 states have internal predecessors, (2960), 0 states have call successors, (0), 0 states 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 22:51:25,499 INFO L175 Difference]: Start difference. First operand has 166 places, 210 transitions, 2661 flow. Second operand 9 states and 1130 transitions. [2023-11-06 22:51:25,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 246 transitions, 3397 flow [2023-11-06 22:51:25,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 246 transitions, 3168 flow, removed 93 selfloop flow, removed 15 redundant places. [2023-11-06 22:51:25,589 INFO L231 Difference]: Finished difference. Result has 151 places, 206 transitions, 2621 flow [2023-11-06 22:51:25,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=2328, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2621, PETRI_PLACES=151, PETRI_TRANSITIONS=206} [2023-11-06 22:51:25,590 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 122 predicate places. [2023-11-06 22:51:25,590 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 206 transitions, 2621 flow [2023-11-06 22:51:25,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 118.81818181818181) internal successors, (1307), 11 states have internal predecessors, (1307), 0 states have call successors, (0), 0 states 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 22:51:25,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:51:25,591 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] [2023-11-06 22:51:25,599 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-06 22:51:25,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 22:51:25,792 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 22:51:25,792 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:51:25,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1520577769, now seen corresponding path program 9 times [2023-11-06 22:51:25,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:51:25,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655292294] [2023-11-06 22:51:25,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:51:25,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:51:25,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:51:27,278 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 22:51:27,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:51:27,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655292294] [2023-11-06 22:51:27,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655292294] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:51:27,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539482648] [2023-11-06 22:51:27,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:51:27,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:51:27,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:51:27,281 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:51:27,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 22:51:27,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-06 22:51:27,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:51:27,427 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-06 22:51:27,429 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:51:27,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:51:27,606 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 22 treesize of output 17 [2023-11-06 22:51:27,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:51:27,759 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 36 treesize of output 29 [2023-11-06 22:51:27,870 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:51:27,870 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:51:27,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539482648] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:51:27,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:51:27,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 20 [2023-11-06 22:51:27,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019326610] [2023-11-06 22:51:27,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:51:27,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-06 22:51:27,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:51:27,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-06 22:51:27,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2023-11-06 22:51:28,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 296 [2023-11-06 22:51:28,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 206 transitions, 2621 flow. Second operand has 11 states, 11 states have (on average 118.81818181818181) internal successors, (1307), 11 states have internal predecessors, (1307), 0 states have call successors, (0), 0 states 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 22:51:28,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:51:28,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 296 [2023-11-06 22:51:28,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:51:29,248 INFO L124 PetriNetUnfolderBase]: 960/1743 cut-off events. [2023-11-06 22:51:29,248 INFO L125 PetriNetUnfolderBase]: For 19391/19391 co-relation queries the response was YES. [2023-11-06 22:51:29,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11656 conditions, 1743 events. 960/1743 cut-off events. For 19391/19391 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 9650 event pairs, 168 based on Foata normal form. 2/1745 useless extension candidates. Maximal degree in co-relation 11560. Up to 1002 conditions per place. [2023-11-06 22:51:29,274 INFO L140 encePairwiseOnDemand]: 286/296 looper letters, 156 selfloop transitions, 69 changer transitions 20/245 dead transitions. [2023-11-06 22:51:29,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 245 transitions, 3381 flow [2023-11-06 22:51:29,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:51:29,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-06 22:51:29,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1128 transitions. [2023-11-06 22:51:29,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42342342342342343 [2023-11-06 22:51:29,277 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1128 transitions. [2023-11-06 22:51:29,277 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1128 transitions. [2023-11-06 22:51:29,278 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:51:29,278 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1128 transitions. [2023-11-06 22:51:29,280 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 125.33333333333333) internal successors, (1128), 9 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states 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 22:51:29,283 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 296.0) internal successors, (2960), 10 states have internal predecessors, (2960), 0 states have call successors, (0), 0 states 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 22:51:29,284 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 296.0) internal successors, (2960), 10 states have internal predecessors, (2960), 0 states have call successors, (0), 0 states 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 22:51:29,284 INFO L175 Difference]: Start difference. First operand has 151 places, 206 transitions, 2621 flow. Second operand 9 states and 1128 transitions. [2023-11-06 22:51:29,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 245 transitions, 3381 flow [2023-11-06 22:51:29,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 245 transitions, 3262 flow, removed 24 selfloop flow, removed 4 redundant places. [2023-11-06 22:51:29,391 INFO L231 Difference]: Finished difference. Result has 156 places, 199 transitions, 2562 flow [2023-11-06 22:51:29,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=2502, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2562, PETRI_PLACES=156, PETRI_TRANSITIONS=199} [2023-11-06 22:51:29,392 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 127 predicate places. [2023-11-06 22:51:29,393 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 199 transitions, 2562 flow [2023-11-06 22:51:29,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 118.81818181818181) internal successors, (1307), 11 states have internal predecessors, (1307), 0 states have call successors, (0), 0 states 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 22:51:29,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:51:29,394 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] [2023-11-06 22:51:29,408 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 22:51:29,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-06 22:51:29,600 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 22:51:29,600 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:51:29,600 INFO L85 PathProgramCache]: Analyzing trace with hash -345374393, now seen corresponding path program 10 times [2023-11-06 22:51:29,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:51:29,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468543320] [2023-11-06 22:51:29,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:51:29,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:51:29,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:51:31,580 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 22:51:31,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:51:31,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468543320] [2023-11-06 22:51:31,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468543320] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:51:31,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608461576] [2023-11-06 22:51:31,581 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:51:31,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:51:31,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:51:31,582 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:51:31,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 22:51:31,711 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:51:31,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:51:31,713 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-06 22:51:31,716 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:51:32,190 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 22:51:32,191 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:51:32,582 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:51:32,583 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 56 treesize of output 58 [2023-11-06 22:51:33,130 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 22:51:33,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608461576] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:51:33,131 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:51:33,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 29 [2023-11-06 22:51:33,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388039621] [2023-11-06 22:51:33,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:51:33,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-06 22:51:33,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:51:33,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-06 22:51:33,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=772, Unknown=0, NotChecked=0, Total=930 [2023-11-06 22:51:35,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 296 [2023-11-06 22:51:35,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 199 transitions, 2562 flow. Second operand has 31 states, 31 states have (on average 109.03225806451613) internal successors, (3380), 31 states have internal predecessors, (3380), 0 states have call successors, (0), 0 states 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 22:51:35,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:51:35,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 296 [2023-11-06 22:51:35,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:51:39,453 INFO L124 PetriNetUnfolderBase]: 1139/2177 cut-off events. [2023-11-06 22:51:39,453 INFO L125 PetriNetUnfolderBase]: For 26089/26089 co-relation queries the response was YES. [2023-11-06 22:51:39,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14453 conditions, 2177 events. 1139/2177 cut-off events. For 26089/26089 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 13292 event pairs, 182 based on Foata normal form. 2/2179 useless extension candidates. Maximal degree in co-relation 14316. Up to 487 conditions per place. [2023-11-06 22:51:39,480 INFO L140 encePairwiseOnDemand]: 282/296 looper letters, 227 selfloop transitions, 164 changer transitions 26/417 dead transitions. [2023-11-06 22:51:39,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 417 transitions, 5193 flow [2023-11-06 22:51:39,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-06 22:51:39,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-06 22:51:39,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 3453 transitions. [2023-11-06 22:51:39,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38885135135135135 [2023-11-06 22:51:39,488 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 3453 transitions. [2023-11-06 22:51:39,488 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 3453 transitions. [2023-11-06 22:51:39,489 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:51:39,489 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 3453 transitions. [2023-11-06 22:51:39,496 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 115.1) internal successors, (3453), 30 states have internal predecessors, (3453), 0 states have call successors, (0), 0 states 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 22:51:39,509 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 296.0) internal successors, (9176), 31 states have internal predecessors, (9176), 0 states have call successors, (0), 0 states 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 22:51:39,513 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 296.0) internal successors, (9176), 31 states have internal predecessors, (9176), 0 states have call successors, (0), 0 states 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 22:51:39,513 INFO L175 Difference]: Start difference. First operand has 156 places, 199 transitions, 2562 flow. Second operand 30 states and 3453 transitions. [2023-11-06 22:51:39,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 417 transitions, 5193 flow [2023-11-06 22:51:39,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 417 transitions, 4855 flow, removed 90 selfloop flow, removed 10 redundant places. [2023-11-06 22:51:39,643 INFO L231 Difference]: Finished difference. Result has 183 places, 256 transitions, 3712 flow [2023-11-06 22:51:39,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=2374, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=3712, PETRI_PLACES=183, PETRI_TRANSITIONS=256} [2023-11-06 22:51:39,644 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 154 predicate places. [2023-11-06 22:51:39,645 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 256 transitions, 3712 flow [2023-11-06 22:51:39,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 109.03225806451613) internal successors, (3380), 31 states have internal predecessors, (3380), 0 states have call successors, (0), 0 states 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 22:51:39,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:51:39,647 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] [2023-11-06 22:51:39,661 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 22:51:39,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-06 22:51:39,852 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 22:51:39,853 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:51:39,853 INFO L85 PathProgramCache]: Analyzing trace with hash -2120274097, now seen corresponding path program 11 times [2023-11-06 22:51:39,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:51:39,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940540242] [2023-11-06 22:51:39,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:51:39,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:51:39,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:51:40,997 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 22:51:40,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:51:40,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940540242] [2023-11-06 22:51:40,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940540242] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:51:40,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528279012] [2023-11-06 22:51:40,998 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:51:40,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:51:40,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:51:41,000 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:51:41,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 22:51:41,133 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:51:41,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:51:41,135 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-06 22:51:41,137 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:51:41,562 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 22:51:41,562 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:51:41,824 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:51:41,825 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 58 treesize of output 60 [2023-11-06 22:51:42,537 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 22:51:42,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528279012] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:51:42,538 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:51:42,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 27 [2023-11-06 22:51:42,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804684195] [2023-11-06 22:51:42,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:51:42,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-06 22:51:42,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:51:42,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-06 22:51:42,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=647, Unknown=0, NotChecked=0, Total=812 [2023-11-06 22:51:44,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 296 [2023-11-06 22:51:44,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 256 transitions, 3712 flow. Second operand has 29 states, 29 states have (on average 117.17241379310344) internal successors, (3398), 29 states have internal predecessors, (3398), 0 states have call successors, (0), 0 states 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 22:51:44,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:51:44,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 296 [2023-11-06 22:51:44,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:51:48,378 INFO L124 PetriNetUnfolderBase]: 1280/2434 cut-off events. [2023-11-06 22:51:48,378 INFO L125 PetriNetUnfolderBase]: For 32227/32227 co-relation queries the response was YES. [2023-11-06 22:51:48,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17029 conditions, 2434 events. 1280/2434 cut-off events. For 32227/32227 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 15248 event pairs, 162 based on Foata normal form. 2/2436 useless extension candidates. Maximal degree in co-relation 16851. Up to 579 conditions per place. [2023-11-06 22:51:48,455 INFO L140 encePairwiseOnDemand]: 282/296 looper letters, 197 selfloop transitions, 223 changer transitions 26/446 dead transitions. [2023-11-06 22:51:48,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 446 transitions, 6326 flow [2023-11-06 22:51:48,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-06 22:51:48,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-06 22:51:48,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 3704 transitions. [2023-11-06 22:51:48,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41711711711711713 [2023-11-06 22:51:48,468 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 3704 transitions. [2023-11-06 22:51:48,468 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 3704 transitions. [2023-11-06 22:51:48,469 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:51:48,470 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 3704 transitions. [2023-11-06 22:51:48,479 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 123.46666666666667) internal successors, (3704), 30 states have internal predecessors, (3704), 0 states have call successors, (0), 0 states 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 22:51:48,492 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 296.0) internal successors, (9176), 31 states have internal predecessors, (9176), 0 states have call successors, (0), 0 states 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 22:51:48,494 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 296.0) internal successors, (9176), 31 states have internal predecessors, (9176), 0 states have call successors, (0), 0 states 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 22:51:48,495 INFO L175 Difference]: Start difference. First operand has 183 places, 256 transitions, 3712 flow. Second operand 30 states and 3704 transitions. [2023-11-06 22:51:48,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 446 transitions, 6326 flow [2023-11-06 22:51:48,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 446 transitions, 6029 flow, removed 121 selfloop flow, removed 8 redundant places. [2023-11-06 22:51:48,662 INFO L231 Difference]: Finished difference. Result has 213 places, 309 transitions, 5068 flow [2023-11-06 22:51:48,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=3507, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=5068, PETRI_PLACES=213, PETRI_TRANSITIONS=309} [2023-11-06 22:51:48,663 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 184 predicate places. [2023-11-06 22:51:48,663 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 309 transitions, 5068 flow [2023-11-06 22:51:48,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 117.17241379310344) internal successors, (3398), 29 states have internal predecessors, (3398), 0 states have call successors, (0), 0 states 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 22:51:48,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:51:48,664 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] [2023-11-06 22:51:48,669 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 22:51:48,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-06 22:51:48,865 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 22:51:48,865 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:51:48,865 INFO L85 PathProgramCache]: Analyzing trace with hash -1976017737, now seen corresponding path program 12 times [2023-11-06 22:51:48,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:51:48,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293808114] [2023-11-06 22:51:48,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:51:48,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:51:48,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:51:49,996 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 22:51:49,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:51:49,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293808114] [2023-11-06 22:51:49,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293808114] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:51:49,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296156859] [2023-11-06 22:51:49,997 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:51:49,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:51:49,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:51:50,000 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:51:50,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 22:51:50,153 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-11-06 22:51:50,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:51:50,155 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-06 22:51:50,157 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:51:50,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:51:50,343 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 22 treesize of output 17 [2023-11-06 22:51:50,481 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:51:50,481 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:51:50,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296156859] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:51:50,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:51:50,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 18 [2023-11-06 22:51:50,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266235742] [2023-11-06 22:51:50,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:51:50,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:51:50,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:51:50,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:51:50,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2023-11-06 22:51:50,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 296 [2023-11-06 22:51:50,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 309 transitions, 5068 flow. Second operand has 10 states, 10 states have (on average 121.0) internal successors, (1210), 10 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states 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 22:51:50,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:51:50,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 296 [2023-11-06 22:51:50,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:51:51,874 INFO L124 PetriNetUnfolderBase]: 1322/2523 cut-off events. [2023-11-06 22:51:51,874 INFO L125 PetriNetUnfolderBase]: For 45490/45490 co-relation queries the response was YES. [2023-11-06 22:51:51,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19063 conditions, 2523 events. 1322/2523 cut-off events. For 45490/45490 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 15958 event pairs, 295 based on Foata normal form. 26/2549 useless extension candidates. Maximal degree in co-relation 18877. Up to 1814 conditions per place. [2023-11-06 22:51:51,903 INFO L140 encePairwiseOnDemand]: 285/296 looper letters, 255 selfloop transitions, 78 changer transitions 17/350 dead transitions. [2023-11-06 22:51:51,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 350 transitions, 6217 flow [2023-11-06 22:51:51,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:51:51,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-06 22:51:51,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1140 transitions. [2023-11-06 22:51:51,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42792792792792794 [2023-11-06 22:51:51,908 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1140 transitions. [2023-11-06 22:51:51,908 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1140 transitions. [2023-11-06 22:51:51,908 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:51:51,908 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1140 transitions. [2023-11-06 22:51:51,910 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 126.66666666666667) internal successors, (1140), 9 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states 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 22:51:51,913 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 296.0) internal successors, (2960), 10 states have internal predecessors, (2960), 0 states have call successors, (0), 0 states 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 22:51:51,914 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 296.0) internal successors, (2960), 10 states have internal predecessors, (2960), 0 states have call successors, (0), 0 states 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 22:51:51,914 INFO L175 Difference]: Start difference. First operand has 213 places, 309 transitions, 5068 flow. Second operand 9 states and 1140 transitions. [2023-11-06 22:51:51,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 350 transitions, 6217 flow [2023-11-06 22:51:52,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 350 transitions, 5933 flow, removed 84 selfloop flow, removed 13 redundant places. [2023-11-06 22:51:52,241 INFO L231 Difference]: Finished difference. Result has 210 places, 317 transitions, 5159 flow [2023-11-06 22:51:52,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=4765, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5159, PETRI_PLACES=210, PETRI_TRANSITIONS=317} [2023-11-06 22:51:52,242 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 181 predicate places. [2023-11-06 22:51:52,242 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 317 transitions, 5159 flow [2023-11-06 22:51:52,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 121.0) internal successors, (1210), 10 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states 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 22:51:52,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:51:52,243 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] [2023-11-06 22:51:52,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-06 22:51:52,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-06 22:51:52,443 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 22:51:52,444 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:51:52,444 INFO L85 PathProgramCache]: Analyzing trace with hash 718511705, now seen corresponding path program 13 times [2023-11-06 22:51:52,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:51:52,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004864673] [2023-11-06 22:51:52,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:51:52,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:51:52,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:51:53,524 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 22:51:53,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:51:53,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004864673] [2023-11-06 22:51:53,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004864673] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:51:53,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403859352] [2023-11-06 22:51:53,524 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:51:53,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:51:53,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:51:53,525 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:51:53,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 22:51:53,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:51:53,654 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-06 22:51:53,656 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:51:54,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:51:54,124 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 27 treesize of output 20 [2023-11-06 22:51:54,249 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 22:51:54,250 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:51:54,350 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_516 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_516) c_~queue~0.base)) (.cse1 (* c_~start~0 4))) (= (mod (select .cse0 (+ .cse1 c_~queue~0.offset 4)) 4294967296) (mod (select .cse0 (+ .cse1 c_~queue~0.offset)) 4294967296)))) is different from false [2023-11-06 22:51:54,558 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:51:54,558 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 85 treesize of output 87 [2023-11-06 22:51:54,565 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:51:54,565 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 20 treesize of output 7 [2023-11-06 22:51:55,044 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 22:51:55,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403859352] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:51:55,044 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:51:55,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-11-06 22:51:55,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650188887] [2023-11-06 22:51:55,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:51:55,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-06 22:51:55,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:51:55,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-06 22:51:55,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=811, Unknown=1, NotChecked=58, Total=992 [2023-11-06 22:51:55,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 296 [2023-11-06 22:51:55,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 317 transitions, 5159 flow. Second operand has 32 states, 32 states have (on average 97.96875) internal successors, (3135), 32 states have internal predecessors, (3135), 0 states have call successors, (0), 0 states 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 22:51:55,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:51:55,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 296 [2023-11-06 22:51:55,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:51:59,970 INFO L124 PetriNetUnfolderBase]: 1525/3002 cut-off events. [2023-11-06 22:51:59,970 INFO L125 PetriNetUnfolderBase]: For 51585/51585 co-relation queries the response was YES. [2023-11-06 22:51:59,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22164 conditions, 3002 events. 1525/3002 cut-off events. For 51585/51585 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 20485 event pairs, 291 based on Foata normal form. 2/3004 useless extension candidates. Maximal degree in co-relation 21969. Up to 723 conditions per place. [2023-11-06 22:51:59,999 INFO L140 encePairwiseOnDemand]: 279/296 looper letters, 298 selfloop transitions, 184 changer transitions 37/519 dead transitions. [2023-11-06 22:52:00,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 519 transitions, 7951 flow [2023-11-06 22:52:00,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-06 22:52:00,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-11-06 22:52:00,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 3317 transitions. [2023-11-06 22:52:00,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35019003378378377 [2023-11-06 22:52:00,006 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 3317 transitions. [2023-11-06 22:52:00,006 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 3317 transitions. [2023-11-06 22:52:00,007 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:52:00,008 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 3317 transitions. [2023-11-06 22:52:00,013 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 103.65625) internal successors, (3317), 32 states have internal predecessors, (3317), 0 states have call successors, (0), 0 states 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 22:52:00,021 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 296.0) internal successors, (9768), 33 states have internal predecessors, (9768), 0 states have call successors, (0), 0 states 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 22:52:00,022 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 296.0) internal successors, (9768), 33 states have internal predecessors, (9768), 0 states have call successors, (0), 0 states 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 22:52:00,022 INFO L175 Difference]: Start difference. First operand has 210 places, 317 transitions, 5159 flow. Second operand 32 states and 3317 transitions. [2023-11-06 22:52:00,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 519 transitions, 7951 flow [2023-11-06 22:52:00,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 519 transitions, 7782 flow, removed 40 selfloop flow, removed 6 redundant places. [2023-11-06 22:52:00,427 INFO L231 Difference]: Finished difference. Result has 245 places, 357 transitions, 6115 flow [2023-11-06 22:52:00,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=5027, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=6115, PETRI_PLACES=245, PETRI_TRANSITIONS=357} [2023-11-06 22:52:00,429 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 216 predicate places. [2023-11-06 22:52:00,429 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 357 transitions, 6115 flow [2023-11-06 22:52:00,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 97.96875) internal successors, (3135), 32 states have internal predecessors, (3135), 0 states have call successors, (0), 0 states 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 22:52:00,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:52:00,430 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] [2023-11-06 22:52:00,444 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-06 22:52:00,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-06 22:52:00,636 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 22:52:00,637 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:52:00,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1308587857, now seen corresponding path program 14 times [2023-11-06 22:52:00,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:52:00,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602638324] [2023-11-06 22:52:00,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:00,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:52:00,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:52:01,867 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 22:52:01,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:52:01,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602638324] [2023-11-06 22:52:01,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602638324] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:52:01,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681742092] [2023-11-06 22:52:01,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:52:01,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:01,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:52:01,870 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:52:01,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-06 22:52:02,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-06 22:52:02,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:52:02,021 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-06 22:52:02,023 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:52:02,028 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 130 treesize of output 126 [2023-11-06 22:52:02,216 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 23 treesize of output 18 [2023-11-06 22:52:02,333 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:52:02,333 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:52:02,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681742092] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:52:02,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:52:02,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 18 [2023-11-06 22:52:02,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703818604] [2023-11-06 22:52:02,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:52:02,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:52:02,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:52:02,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:52:02,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2023-11-06 22:52:02,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 296 [2023-11-06 22:52:02,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 357 transitions, 6115 flow. Second operand has 10 states, 10 states have (on average 121.0) internal successors, (1210), 10 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states 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 22:52:02,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:52:02,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 296 [2023-11-06 22:52:02,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:52:03,769 INFO L124 PetriNetUnfolderBase]: 1565/3037 cut-off events. [2023-11-06 22:52:03,770 INFO L125 PetriNetUnfolderBase]: For 57150/57150 co-relation queries the response was YES. [2023-11-06 22:52:03,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23925 conditions, 3037 events. 1565/3037 cut-off events. For 57150/57150 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 20307 event pairs, 385 based on Foata normal form. 2/3039 useless extension candidates. Maximal degree in co-relation 23745. Up to 2446 conditions per place. [2023-11-06 22:52:03,812 INFO L140 encePairwiseOnDemand]: 285/296 looper letters, 306 selfloop transitions, 76 changer transitions 17/399 dead transitions. [2023-11-06 22:52:03,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 399 transitions, 7429 flow [2023-11-06 22:52:03,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:52:03,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-06 22:52:03,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1143 transitions. [2023-11-06 22:52:03,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42905405405405406 [2023-11-06 22:52:03,815 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1143 transitions. [2023-11-06 22:52:03,815 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1143 transitions. [2023-11-06 22:52:03,816 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:52:03,816 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1143 transitions. [2023-11-06 22:52:03,818 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 127.0) internal successors, (1143), 9 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states 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 22:52:03,820 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 296.0) internal successors, (2960), 10 states have internal predecessors, (2960), 0 states have call successors, (0), 0 states 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 22:52:03,820 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 296.0) internal successors, (2960), 10 states have internal predecessors, (2960), 0 states have call successors, (0), 0 states 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 22:52:03,820 INFO L175 Difference]: Start difference. First operand has 245 places, 357 transitions, 6115 flow. Second operand 9 states and 1143 transitions. [2023-11-06 22:52:03,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 399 transitions, 7429 flow [2023-11-06 22:52:04,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 399 transitions, 7244 flow, removed 64 selfloop flow, removed 14 redundant places. [2023-11-06 22:52:04,213 INFO L231 Difference]: Finished difference. Result has 236 places, 362 transitions, 6271 flow [2023-11-06 22:52:04,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=5966, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6271, PETRI_PLACES=236, PETRI_TRANSITIONS=362} [2023-11-06 22:52:04,214 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 207 predicate places. [2023-11-06 22:52:04,214 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 362 transitions, 6271 flow [2023-11-06 22:52:04,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 121.0) internal successors, (1210), 10 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states 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 22:52:04,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:52:04,214 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] [2023-11-06 22:52:04,219 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-06 22:52:04,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-06 22:52:04,415 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 22:52:04,415 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:52:04,415 INFO L85 PathProgramCache]: Analyzing trace with hash -1320155869, now seen corresponding path program 15 times [2023-11-06 22:52:04,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:52:04,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990930001] [2023-11-06 22:52:04,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:04,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:52:04,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:52:05,539 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 22:52:05,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:52:05,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990930001] [2023-11-06 22:52:05,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990930001] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:52:05,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276988758] [2023-11-06 22:52:05,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:52:05,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:05,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:52:05,541 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:52:05,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-06 22:52:05,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-06 22:52:05,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:52:05,698 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-06 22:52:05,700 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:52:05,709 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 178 treesize of output 174 [2023-11-06 22:52:05,937 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 36 treesize of output 29 [2023-11-06 22:52:06,035 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:52:06,035 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:52:06,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276988758] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:52:06,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:52:06,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 18 [2023-11-06 22:52:06,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104011475] [2023-11-06 22:52:06,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:52:06,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:52:06,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:52:06,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:52:06,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2023-11-06 22:52:06,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 296 [2023-11-06 22:52:06,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 362 transitions, 6271 flow. Second operand has 10 states, 10 states have (on average 121.0) internal successors, (1210), 10 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states 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 22:52:06,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:52:06,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 296 [2023-11-06 22:52:06,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:52:07,604 INFO L124 PetriNetUnfolderBase]: 1552/3009 cut-off events. [2023-11-06 22:52:07,604 INFO L125 PetriNetUnfolderBase]: For 57493/57493 co-relation queries the response was YES. [2023-11-06 22:52:07,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23357 conditions, 3009 events. 1552/3009 cut-off events. For 57493/57493 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 20039 event pairs, 380 based on Foata normal form. 2/3011 useless extension candidates. Maximal degree in co-relation 23161. Up to 2425 conditions per place. [2023-11-06 22:52:07,634 INFO L140 encePairwiseOnDemand]: 286/296 looper letters, 305 selfloop transitions, 71 changer transitions 19/395 dead transitions. [2023-11-06 22:52:07,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 395 transitions, 7375 flow [2023-11-06 22:52:07,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:52:07,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-06 22:52:07,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1143 transitions. [2023-11-06 22:52:07,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42905405405405406 [2023-11-06 22:52:07,638 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1143 transitions. [2023-11-06 22:52:07,638 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1143 transitions. [2023-11-06 22:52:07,638 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:52:07,639 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1143 transitions. [2023-11-06 22:52:07,640 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 127.0) internal successors, (1143), 9 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states 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 22:52:07,643 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 296.0) internal successors, (2960), 10 states have internal predecessors, (2960), 0 states have call successors, (0), 0 states 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 22:52:07,643 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 296.0) internal successors, (2960), 10 states have internal predecessors, (2960), 0 states have call successors, (0), 0 states 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 22:52:07,644 INFO L175 Difference]: Start difference. First operand has 236 places, 362 transitions, 6271 flow. Second operand 9 states and 1143 transitions. [2023-11-06 22:52:07,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 395 transitions, 7375 flow [2023-11-06 22:52:08,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 395 transitions, 7216 flow, removed 13 selfloop flow, removed 9 redundant places. [2023-11-06 22:52:08,040 INFO L231 Difference]: Finished difference. Result has 236 places, 356 transitions, 6152 flow [2023-11-06 22:52:08,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=6114, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6152, PETRI_PLACES=236, PETRI_TRANSITIONS=356} [2023-11-06 22:52:08,041 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 207 predicate places. [2023-11-06 22:52:08,041 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 356 transitions, 6152 flow [2023-11-06 22:52:08,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 121.0) internal successors, (1210), 10 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states 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 22:52:08,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:52:08,042 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] [2023-11-06 22:52:08,053 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-06 22:52:08,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-06 22:52:08,253 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 22:52:08,253 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:52:08,253 INFO L85 PathProgramCache]: Analyzing trace with hash -45314239, now seen corresponding path program 16 times [2023-11-06 22:52:08,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:52:08,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405544178] [2023-11-06 22:52:08,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:08,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:52:08,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:52:09,421 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 22:52:09,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:52:09,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405544178] [2023-11-06 22:52:09,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405544178] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:52:09,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055492881] [2023-11-06 22:52:09,423 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:52:09,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:09,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:52:09,424 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:52:09,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-06 22:52:09,557 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:52:09,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:52:09,559 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-06 22:52:09,561 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:52:09,573 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 510 treesize of output 494 [2023-11-06 22:52:09,859 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 22 treesize of output 17 [2023-11-06 22:52:10,058 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 22:52:10,059 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:52:10,453 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:52:10,454 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 112 treesize of output 114 [2023-11-06 22:52:10,481 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:52:10,481 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 56 [2023-11-06 22:52:11,071 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 22:52:11,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055492881] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:52:11,071 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:52:11,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-11-06 22:52:11,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865703786] [2023-11-06 22:52:11,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:52:11,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-06 22:52:11,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:52:11,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-06 22:52:11,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=883, Unknown=1, NotChecked=0, Total=992 [2023-11-06 22:52:15,432 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 22:52:16,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 296 [2023-11-06 22:52:16,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 356 transitions, 6152 flow. Second operand has 32 states, 32 states have (on average 97.96875) internal successors, (3135), 32 states have internal predecessors, (3135), 0 states have call successors, (0), 0 states 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 22:52:16,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:52:16,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 296 [2023-11-06 22:52:16,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:52:19,951 INFO L124 PetriNetUnfolderBase]: 1546/2985 cut-off events. [2023-11-06 22:52:19,952 INFO L125 PetriNetUnfolderBase]: For 58138/58138 co-relation queries the response was YES. [2023-11-06 22:52:19,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23167 conditions, 2985 events. 1546/2985 cut-off events. For 58138/58138 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 19830 event pairs, 356 based on Foata normal form. 2/2987 useless extension candidates. Maximal degree in co-relation 22975. Up to 943 conditions per place. [2023-11-06 22:52:19,992 INFO L140 encePairwiseOnDemand]: 284/296 looper letters, 313 selfloop transitions, 150 changer transitions 28/491 dead transitions. [2023-11-06 22:52:19,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 491 transitions, 8258 flow [2023-11-06 22:52:19,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-06 22:52:19,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-06 22:52:19,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2999 transitions. [2023-11-06 22:52:19,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3493709226467847 [2023-11-06 22:52:19,998 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2999 transitions. [2023-11-06 22:52:19,998 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2999 transitions. [2023-11-06 22:52:19,999 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:52:19,999 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2999 transitions. [2023-11-06 22:52:20,084 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 103.41379310344827) internal successors, (2999), 29 states have internal predecessors, (2999), 0 states have call successors, (0), 0 states 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 22:52:20,091 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 296.0) internal successors, (8880), 30 states have internal predecessors, (8880), 0 states have call successors, (0), 0 states 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 22:52:20,094 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 296.0) internal successors, (8880), 30 states have internal predecessors, (8880), 0 states have call successors, (0), 0 states 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 22:52:20,094 INFO L175 Difference]: Start difference. First operand has 236 places, 356 transitions, 6152 flow. Second operand 29 states and 2999 transitions. [2023-11-06 22:52:20,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 491 transitions, 8258 flow [2023-11-06 22:52:20,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 491 transitions, 8081 flow, removed 26 selfloop flow, removed 9 redundant places. [2023-11-06 22:52:20,399 INFO L231 Difference]: Finished difference. Result has 257 places, 359 transitions, 6428 flow [2023-11-06 22:52:20,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=6018, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=6428, PETRI_PLACES=257, PETRI_TRANSITIONS=359} [2023-11-06 22:52:20,400 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 228 predicate places. [2023-11-06 22:52:20,400 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 359 transitions, 6428 flow [2023-11-06 22:52:20,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 97.96875) internal successors, (3135), 32 states have internal predecessors, (3135), 0 states have call successors, (0), 0 states 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 22:52:20,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:52:20,401 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] [2023-11-06 22:52:20,406 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-06 22:52:20,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-06 22:52:20,602 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 22:52:20,602 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:52:20,602 INFO L85 PathProgramCache]: Analyzing trace with hash -156836245, now seen corresponding path program 17 times [2023-11-06 22:52:20,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:52:20,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588469978] [2023-11-06 22:52:20,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:20,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:52:20,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:52:22,119 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 22:52:22,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:52:22,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588469978] [2023-11-06 22:52:22,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588469978] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:52:22,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779598459] [2023-11-06 22:52:22,120 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:52:22,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:22,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:52:22,121 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:52:22,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-06 22:52:22,259 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:52:22,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:52:22,262 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-06 22:52:22,264 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:52:22,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:52:22,535 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 36 treesize of output 29 [2023-11-06 22:52:22,628 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:52:22,628 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:52:22,724 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_673 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_673) c_~queue~0.base)) (.cse1 (* c_~start~0 4))) (= (mod (select .cse0 (+ .cse1 c_~queue~0.offset 4)) 4294967296) (mod (select .cse0 (+ .cse1 c_~queue~0.offset)) 4294967296)))) is different from false [2023-11-06 22:52:22,851 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:52:22,851 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 87 treesize of output 89 [2023-11-06 22:52:22,859 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:52:22,859 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 20 treesize of output 7 [2023-11-06 22:52:23,141 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:52:23,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779598459] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:52:23,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:52:23,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11, 9] total 28 [2023-11-06 22:52:23,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951512371] [2023-11-06 22:52:23,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:52:23,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:52:23,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:52:23,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:52:23,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=726, Unknown=1, NotChecked=54, Total=870 [2023-11-06 22:52:23,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 296 [2023-11-06 22:52:23,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 359 transitions, 6428 flow. Second operand has 10 states, 10 states have (on average 111.0) internal successors, (1110), 10 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:52:23,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:52:23,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 296 [2023-11-06 22:52:23,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:52:23,481 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (forall ((v_ArrVal_673 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_673) c_~queue~0.base)) (.cse2 (* c_~start~0 4))) (= (mod (select .cse1 (+ .cse2 c_~queue~0.offset 4)) 4294967296) (mod (select .cse1 (+ .cse2 c_~queue~0.offset)) 4294967296)))))) (and (or (not (= (mod |c_thread2Thread1of1ForFork1_~x~1#1| 4294967296) (mod (select (select |c_#memory_int| c_~queue~0.base) (+ (* c_~end~0 4) c_~queue~0.offset)) 4294967296))) .cse0) .cse0)) is different from false [2023-11-06 22:52:24,447 INFO L124 PetriNetUnfolderBase]: 1547/2993 cut-off events. [2023-11-06 22:52:24,447 INFO L125 PetriNetUnfolderBase]: For 59034/59034 co-relation queries the response was YES. [2023-11-06 22:52:24,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23641 conditions, 2993 events. 1547/2993 cut-off events. For 59034/59034 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 19815 event pairs, 370 based on Foata normal form. 2/2995 useless extension candidates. Maximal degree in co-relation 23436. Up to 2248 conditions per place. [2023-11-06 22:52:24,476 INFO L140 encePairwiseOnDemand]: 280/296 looper letters, 277 selfloop transitions, 97 changer transitions 25/399 dead transitions. [2023-11-06 22:52:24,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 399 transitions, 7609 flow [2023-11-06 22:52:24,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 22:52:24,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-06 22:52:24,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1169 transitions. [2023-11-06 22:52:24,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3949324324324324 [2023-11-06 22:52:24,479 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1169 transitions. [2023-11-06 22:52:24,479 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1169 transitions. [2023-11-06 22:52:24,479 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:52:24,480 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1169 transitions. [2023-11-06 22:52:24,482 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 116.9) internal successors, (1169), 10 states have internal predecessors, (1169), 0 states have call successors, (0), 0 states 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 22:52:24,484 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 296.0) internal successors, (3256), 11 states have internal predecessors, (3256), 0 states have call successors, (0), 0 states 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 22:52:24,485 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 296.0) internal successors, (3256), 11 states have internal predecessors, (3256), 0 states have call successors, (0), 0 states 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 22:52:24,485 INFO L175 Difference]: Start difference. First operand has 257 places, 359 transitions, 6428 flow. Second operand 10 states and 1169 transitions. [2023-11-06 22:52:24,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 399 transitions, 7609 flow [2023-11-06 22:52:24,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 399 transitions, 7451 flow, removed 19 selfloop flow, removed 16 redundant places. [2023-11-06 22:52:24,848 INFO L231 Difference]: Finished difference. Result has 252 places, 354 transitions, 6452 flow [2023-11-06 22:52:24,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=6274, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6452, PETRI_PLACES=252, PETRI_TRANSITIONS=354} [2023-11-06 22:52:24,850 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 223 predicate places. [2023-11-06 22:52:24,850 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 354 transitions, 6452 flow [2023-11-06 22:52:24,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 111.0) internal successors, (1110), 10 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:52:24,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:52:24,850 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:52:24,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-06 22:52:25,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:25,051 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 22:52:25,051 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:52:25,052 INFO L85 PathProgramCache]: Analyzing trace with hash -82439184, now seen corresponding path program 18 times [2023-11-06 22:52:25,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:52:25,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811657646] [2023-11-06 22:52:25,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:25,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:52:25,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:52:26,619 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:52:26,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:52:26,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811657646] [2023-11-06 22:52:26,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811657646] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:52:26,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817615973] [2023-11-06 22:52:26,619 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:52:26,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:26,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:52:26,620 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:52:26,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-06 22:52:26,777 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-11-06 22:52:26,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:52:26,778 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-06 22:52:26,780 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:52:27,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:52:27,027 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 36 treesize of output 29 [2023-11-06 22:52:27,125 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:52:27,125 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:52:27,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817615973] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:52:27,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:52:27,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 19 [2023-11-06 22:52:27,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697428903] [2023-11-06 22:52:27,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:52:27,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:52:27,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:52:27,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:52:27,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2023-11-06 22:52:27,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 296 [2023-11-06 22:52:27,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 354 transitions, 6452 flow. Second operand has 10 states, 10 states have (on average 121.0) internal successors, (1210), 10 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states 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 22:52:27,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:52:27,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 296 [2023-11-06 22:52:27,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:52:28,620 INFO L124 PetriNetUnfolderBase]: 1572/2994 cut-off events. [2023-11-06 22:52:28,620 INFO L125 PetriNetUnfolderBase]: For 61609/61609 co-relation queries the response was YES. [2023-11-06 22:52:28,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24994 conditions, 2994 events. 1572/2994 cut-off events. For 61609/61609 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 19501 event pairs, 371 based on Foata normal form. 1/2995 useless extension candidates. Maximal degree in co-relation 24911. Up to 2442 conditions per place. [2023-11-06 22:52:28,650 INFO L140 encePairwiseOnDemand]: 286/296 looper letters, 310 selfloop transitions, 69 changer transitions 18/397 dead transitions. [2023-11-06 22:52:28,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 397 transitions, 7779 flow [2023-11-06 22:52:28,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:52:28,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-06 22:52:28,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1145 transitions. [2023-11-06 22:52:28,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298048048048048 [2023-11-06 22:52:28,653 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1145 transitions. [2023-11-06 22:52:28,653 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1145 transitions. [2023-11-06 22:52:28,653 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:52:28,653 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1145 transitions. [2023-11-06 22:52:28,655 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 127.22222222222223) internal successors, (1145), 9 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states 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 22:52:28,656 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 296.0) internal successors, (2960), 10 states have internal predecessors, (2960), 0 states have call successors, (0), 0 states 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 22:52:28,657 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 296.0) internal successors, (2960), 10 states have internal predecessors, (2960), 0 states have call successors, (0), 0 states 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 22:52:28,657 INFO L175 Difference]: Start difference. First operand has 252 places, 354 transitions, 6452 flow. Second operand 9 states and 1145 transitions. [2023-11-06 22:52:28,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 397 transitions, 7779 flow [2023-11-06 22:52:29,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 397 transitions, 7493 flow, removed 73 selfloop flow, removed 9 redundant places. [2023-11-06 22:52:29,020 INFO L231 Difference]: Finished difference. Result has 247 places, 357 transitions, 6457 flow [2023-11-06 22:52:29,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=6222, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6457, PETRI_PLACES=247, PETRI_TRANSITIONS=357} [2023-11-06 22:52:29,021 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 218 predicate places. [2023-11-06 22:52:29,021 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 357 transitions, 6457 flow [2023-11-06 22:52:29,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 121.0) internal successors, (1210), 10 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states 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 22:52:29,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:52:29,021 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] [2023-11-06 22:52:29,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-06 22:52:29,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:29,222 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 22:52:29,222 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:52:29,222 INFO L85 PathProgramCache]: Analyzing trace with hash 465067948, now seen corresponding path program 1 times [2023-11-06 22:52:29,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:52:29,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767139009] [2023-11-06 22:52:29,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:29,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:52:29,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:52:29,327 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:52:29,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:52:29,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767139009] [2023-11-06 22:52:29,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767139009] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:52:29,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:52:29,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:52:29,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641495487] [2023-11-06 22:52:29,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:52:29,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:52:29,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:52:29,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:52:29,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:52:29,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 296 [2023-11-06 22:52:29,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 357 transitions, 6457 flow. Second operand has 5 states, 5 states have (on average 135.2) internal successors, (676), 5 states have internal predecessors, (676), 0 states have call successors, (0), 0 states 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 22:52:29,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:52:29,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 296 [2023-11-06 22:52:29,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:52:30,299 INFO L124 PetriNetUnfolderBase]: 1555/2933 cut-off events. [2023-11-06 22:52:30,299 INFO L125 PetriNetUnfolderBase]: For 61000/61000 co-relation queries the response was YES. [2023-11-06 22:52:30,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23855 conditions, 2933 events. 1555/2933 cut-off events. For 61000/61000 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 18881 event pairs, 227 based on Foata normal form. 153/3086 useless extension candidates. Maximal degree in co-relation 23773. Up to 2060 conditions per place. [2023-11-06 22:52:30,334 INFO L140 encePairwiseOnDemand]: 290/296 looper letters, 287 selfloop transitions, 121 changer transitions 0/408 dead transitions. [2023-11-06 22:52:30,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 408 transitions, 7886 flow [2023-11-06 22:52:30,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:52:30,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:52:30,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 852 transitions. [2023-11-06 22:52:30,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4797297297297297 [2023-11-06 22:52:30,336 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 852 transitions. [2023-11-06 22:52:30,336 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 852 transitions. [2023-11-06 22:52:30,336 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:52:30,336 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 852 transitions. [2023-11-06 22:52:30,337 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 142.0) internal successors, (852), 6 states have internal predecessors, (852), 0 states have call successors, (0), 0 states 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 22:52:30,339 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 296.0) internal successors, (2072), 7 states have internal predecessors, (2072), 0 states have call successors, (0), 0 states 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 22:52:30,339 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 296.0) internal successors, (2072), 7 states have internal predecessors, (2072), 0 states have call successors, (0), 0 states 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 22:52:30,339 INFO L175 Difference]: Start difference. First operand has 247 places, 357 transitions, 6457 flow. Second operand 6 states and 852 transitions. [2023-11-06 22:52:30,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 408 transitions, 7886 flow [2023-11-06 22:52:30,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 408 transitions, 7654 flow, removed 32 selfloop flow, removed 10 redundant places. [2023-11-06 22:52:30,713 INFO L231 Difference]: Finished difference. Result has 240 places, 355 transitions, 6623 flow [2023-11-06 22:52:30,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=5772, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6623, PETRI_PLACES=240, PETRI_TRANSITIONS=355} [2023-11-06 22:52:30,714 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 211 predicate places. [2023-11-06 22:52:30,714 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 355 transitions, 6623 flow [2023-11-06 22:52:30,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 135.2) internal successors, (676), 5 states have internal predecessors, (676), 0 states have call successors, (0), 0 states 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 22:52:30,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:52:30,715 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] [2023-11-06 22:52:30,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-11-06 22:52:30,715 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 22:52:30,716 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:52:30,716 INFO L85 PathProgramCache]: Analyzing trace with hash 348585182, now seen corresponding path program 2 times [2023-11-06 22:52:30,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:52:30,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880056388] [2023-11-06 22:52:30,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:30,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:52:30,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:52:30,807 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:52:30,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:52:30,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880056388] [2023-11-06 22:52:30,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880056388] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:52:30,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:52:30,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:52:30,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100125783] [2023-11-06 22:52:30,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:52:30,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:52:30,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:52:30,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:52:30,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:52:30,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 296 [2023-11-06 22:52:30,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 355 transitions, 6623 flow. Second operand has 5 states, 5 states have (on average 135.2) internal successors, (676), 5 states have internal predecessors, (676), 0 states have call successors, (0), 0 states 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 22:52:30,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:52:30,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 296 [2023-11-06 22:52:30,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:52:31,666 INFO L124 PetriNetUnfolderBase]: 1292/2551 cut-off events. [2023-11-06 22:52:31,666 INFO L125 PetriNetUnfolderBase]: For 62286/62286 co-relation queries the response was YES. [2023-11-06 22:52:31,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21312 conditions, 2551 events. 1292/2551 cut-off events. For 62286/62286 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 16673 event pairs, 376 based on Foata normal form. 155/2706 useless extension candidates. Maximal degree in co-relation 21231. Up to 1710 conditions per place. [2023-11-06 22:52:31,691 INFO L140 encePairwiseOnDemand]: 291/296 looper letters, 244 selfloop transitions, 71 changer transitions 33/348 dead transitions. [2023-11-06 22:52:31,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 348 transitions, 6807 flow [2023-11-06 22:52:31,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:52:31,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:52:31,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 709 transitions. [2023-11-06 22:52:31,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47905405405405405 [2023-11-06 22:52:31,693 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 709 transitions. [2023-11-06 22:52:31,693 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 709 transitions. [2023-11-06 22:52:31,693 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:52:31,693 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 709 transitions. [2023-11-06 22:52:31,694 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 141.8) internal successors, (709), 5 states have internal predecessors, (709), 0 states have call successors, (0), 0 states 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 22:52:31,695 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 296.0) internal successors, (1776), 6 states have internal predecessors, (1776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:52:31,695 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 296.0) internal successors, (1776), 6 states have internal predecessors, (1776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:52:31,696 INFO L175 Difference]: Start difference. First operand has 240 places, 355 transitions, 6623 flow. Second operand 5 states and 709 transitions. [2023-11-06 22:52:31,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 348 transitions, 6807 flow [2023-11-06 22:52:32,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 348 transitions, 6531 flow, removed 50 selfloop flow, removed 10 redundant places. [2023-11-06 22:52:32,037 INFO L231 Difference]: Finished difference. Result has 234 places, 291 transitions, 5237 flow [2023-11-06 22:52:32,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=5350, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=5237, PETRI_PLACES=234, PETRI_TRANSITIONS=291} [2023-11-06 22:52:32,038 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 205 predicate places. [2023-11-06 22:52:32,038 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 291 transitions, 5237 flow [2023-11-06 22:52:32,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 135.2) internal successors, (676), 5 states have internal predecessors, (676), 0 states have call successors, (0), 0 states 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 22:52:32,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:52:32,039 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] [2023-11-06 22:52:32,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-11-06 22:52:32,039 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 22:52:32,039 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:52:32,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1133617590, now seen corresponding path program 3 times [2023-11-06 22:52:32,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:52:32,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788758669] [2023-11-06 22:52:32,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:32,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:52:32,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:52:32,133 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:52:32,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:52:32,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788758669] [2023-11-06 22:52:32,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788758669] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:52:32,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:52:32,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:52:32,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379919992] [2023-11-06 22:52:32,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:52:32,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:52:32,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:52:32,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:52:32,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:52:32,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 296 [2023-11-06 22:52:32,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 291 transitions, 5237 flow. Second operand has 5 states, 5 states have (on average 135.2) internal successors, (676), 5 states have internal predecessors, (676), 0 states have call successors, (0), 0 states 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 22:52:32,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:52:32,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 296 [2023-11-06 22:52:32,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:52:32,860 INFO L124 PetriNetUnfolderBase]: 1225/2279 cut-off events. [2023-11-06 22:52:32,860 INFO L125 PetriNetUnfolderBase]: For 55019/55019 co-relation queries the response was YES. [2023-11-06 22:52:32,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19217 conditions, 2279 events. 1225/2279 cut-off events. For 55019/55019 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 13477 event pairs, 361 based on Foata normal form. 45/2324 useless extension candidates. Maximal degree in co-relation 19140. Up to 1846 conditions per place. [2023-11-06 22:52:32,884 INFO L140 encePairwiseOnDemand]: 290/296 looper letters, 223 selfloop transitions, 81 changer transitions 3/307 dead transitions. [2023-11-06 22:52:32,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 307 transitions, 6008 flow [2023-11-06 22:52:32,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:52:32,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:52:32,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 702 transitions. [2023-11-06 22:52:32,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4743243243243243 [2023-11-06 22:52:32,886 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 702 transitions. [2023-11-06 22:52:32,886 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 702 transitions. [2023-11-06 22:52:32,886 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:52:32,886 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 702 transitions. [2023-11-06 22:52:32,887 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 140.4) internal successors, (702), 5 states have internal predecessors, (702), 0 states have call successors, (0), 0 states 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 22:52:32,888 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 296.0) internal successors, (1776), 6 states have internal predecessors, (1776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:52:32,888 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 296.0) internal successors, (1776), 6 states have internal predecessors, (1776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:52:32,889 INFO L175 Difference]: Start difference. First operand has 234 places, 291 transitions, 5237 flow. Second operand 5 states and 702 transitions. [2023-11-06 22:52:32,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 307 transitions, 6008 flow [2023-11-06 22:52:33,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 307 transitions, 5755 flow, removed 48 selfloop flow, removed 11 redundant places. [2023-11-06 22:52:33,127 INFO L231 Difference]: Finished difference. Result has 219 places, 278 transitions, 4884 flow [2023-11-06 22:52:33,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=4608, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4884, PETRI_PLACES=219, PETRI_TRANSITIONS=278} [2023-11-06 22:52:33,128 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 190 predicate places. [2023-11-06 22:52:33,128 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 278 transitions, 4884 flow [2023-11-06 22:52:33,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 135.2) internal successors, (676), 5 states have internal predecessors, (676), 0 states have call successors, (0), 0 states 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 22:52:33,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:52:33,129 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] [2023-11-06 22:52:33,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-11-06 22:52:33,129 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 22:52:33,129 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:52:33,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1377715395, now seen corresponding path program 1 times [2023-11-06 22:52:33,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:52:33,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433024858] [2023-11-06 22:52:33,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:33,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:52:33,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:52:33,236 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:52:33,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:52:33,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433024858] [2023-11-06 22:52:33,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433024858] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:52:33,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:52:33,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:52:33,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839133566] [2023-11-06 22:52:33,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:52:33,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:52:33,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:52:33,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:52:33,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:52:33,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 296 [2023-11-06 22:52:33,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 278 transitions, 4884 flow. Second operand has 5 states, 5 states have (on average 134.2) internal successors, (671), 5 states have internal predecessors, (671), 0 states have call successors, (0), 0 states 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 22:52:33,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:52:33,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 296 [2023-11-06 22:52:33,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:52:33,868 INFO L124 PetriNetUnfolderBase]: 1137/2080 cut-off events. [2023-11-06 22:52:33,868 INFO L125 PetriNetUnfolderBase]: For 43778/43778 co-relation queries the response was YES. [2023-11-06 22:52:33,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17239 conditions, 2080 events. 1137/2080 cut-off events. For 43778/43778 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 11794 event pairs, 330 based on Foata normal form. 21/2101 useless extension candidates. Maximal degree in co-relation 17167. Up to 1647 conditions per place. [2023-11-06 22:52:33,887 INFO L140 encePairwiseOnDemand]: 290/296 looper letters, 201 selfloop transitions, 71 changer transitions 8/280 dead transitions. [2023-11-06 22:52:33,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 280 transitions, 5363 flow [2023-11-06 22:52:33,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:52:33,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:52:33,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 693 transitions. [2023-11-06 22:52:33,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46824324324324323 [2023-11-06 22:52:33,889 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 693 transitions. [2023-11-06 22:52:33,889 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 693 transitions. [2023-11-06 22:52:33,889 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:52:33,889 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 693 transitions. [2023-11-06 22:52:33,890 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 138.6) internal successors, (693), 5 states have internal predecessors, (693), 0 states have call successors, (0), 0 states 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 22:52:33,890 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 296.0) internal successors, (1776), 6 states have internal predecessors, (1776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:52:33,891 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 296.0) internal successors, (1776), 6 states have internal predecessors, (1776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:52:33,891 INFO L175 Difference]: Start difference. First operand has 219 places, 278 transitions, 4884 flow. Second operand 5 states and 693 transitions. [2023-11-06 22:52:33,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 280 transitions, 5363 flow [2023-11-06 22:52:34,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 280 transitions, 5141 flow, removed 29 selfloop flow, removed 8 redundant places. [2023-11-06 22:52:34,077 INFO L231 Difference]: Finished difference. Result has 210 places, 260 transitions, 4443 flow [2023-11-06 22:52:34,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=4411, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4443, PETRI_PLACES=210, PETRI_TRANSITIONS=260} [2023-11-06 22:52:34,077 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 181 predicate places. [2023-11-06 22:52:34,077 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 260 transitions, 4443 flow [2023-11-06 22:52:34,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 134.2) internal successors, (671), 5 states have internal predecessors, (671), 0 states have call successors, (0), 0 states 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 22:52:34,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:52:34,078 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] [2023-11-06 22:52:34,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-11-06 22:52:34,078 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 22:52:34,079 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:52:34,079 INFO L85 PathProgramCache]: Analyzing trace with hash -1252897907, now seen corresponding path program 2 times [2023-11-06 22:52:34,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:52:34,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108762565] [2023-11-06 22:52:34,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:34,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:52:34,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:52:34,169 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:52:34,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:52:34,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108762565] [2023-11-06 22:52:34,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108762565] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:52:34,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:52:34,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:52:34,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719026644] [2023-11-06 22:52:34,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:52:34,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:52:34,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:52:34,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:52:34,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:52:34,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 296 [2023-11-06 22:52:34,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 260 transitions, 4443 flow. Second operand has 5 states, 5 states have (on average 135.2) internal successors, (676), 5 states have internal predecessors, (676), 0 states have call successors, (0), 0 states 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 22:52:34,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:52:34,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 296 [2023-11-06 22:52:34,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:52:34,761 INFO L124 PetriNetUnfolderBase]: 1028/1884 cut-off events. [2023-11-06 22:52:34,761 INFO L125 PetriNetUnfolderBase]: For 37584/37584 co-relation queries the response was YES. [2023-11-06 22:52:34,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15215 conditions, 1884 events. 1028/1884 cut-off events. For 37584/37584 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 10445 event pairs, 308 based on Foata normal form. 42/1926 useless extension candidates. Maximal degree in co-relation 15145. Up to 1441 conditions per place. [2023-11-06 22:52:34,777 INFO L140 encePairwiseOnDemand]: 290/296 looper letters, 190 selfloop transitions, 48 changer transitions 20/258 dead transitions. [2023-11-06 22:52:34,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 258 transitions, 4674 flow [2023-11-06 22:52:34,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:52:34,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:52:34,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 705 transitions. [2023-11-06 22:52:34,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47635135135135137 [2023-11-06 22:52:34,779 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 705 transitions. [2023-11-06 22:52:34,779 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 705 transitions. [2023-11-06 22:52:34,779 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:52:34,779 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 705 transitions. [2023-11-06 22:52:34,780 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 141.0) internal successors, (705), 5 states have internal predecessors, (705), 0 states have call successors, (0), 0 states 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 22:52:34,781 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 296.0) internal successors, (1776), 6 states have internal predecessors, (1776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:52:34,781 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 296.0) internal successors, (1776), 6 states have internal predecessors, (1776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:52:34,781 INFO L175 Difference]: Start difference. First operand has 210 places, 260 transitions, 4443 flow. Second operand 5 states and 705 transitions. [2023-11-06 22:52:34,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 258 transitions, 4674 flow [2023-11-06 22:52:34,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 258 transitions, 4423 flow, removed 30 selfloop flow, removed 10 redundant places. [2023-11-06 22:52:34,944 INFO L231 Difference]: Finished difference. Result has 199 places, 220 transitions, 3523 flow [2023-11-06 22:52:34,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=3766, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3523, PETRI_PLACES=199, PETRI_TRANSITIONS=220} [2023-11-06 22:52:34,945 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 170 predicate places. [2023-11-06 22:52:34,945 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 220 transitions, 3523 flow [2023-11-06 22:52:34,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 135.2) internal successors, (676), 5 states have internal predecessors, (676), 0 states have call successors, (0), 0 states 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 22:52:34,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:52:34,946 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] [2023-11-06 22:52:34,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-11-06 22:52:34,946 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 22:52:34,946 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:52:34,946 INFO L85 PathProgramCache]: Analyzing trace with hash 675005010, now seen corresponding path program 1 times [2023-11-06 22:52:34,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:52:34,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307093682] [2023-11-06 22:52:34,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:34,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:52:34,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:52:35,005 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:52:35,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:52:35,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307093682] [2023-11-06 22:52:35,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307093682] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:52:35,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:52:35,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:52:35,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314401920] [2023-11-06 22:52:35,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:52:35,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:52:35,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:52:35,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:52:35,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:52:35,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 296 [2023-11-06 22:52:35,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 220 transitions, 3523 flow. Second operand has 4 states, 4 states have (on average 143.5) internal successors, (574), 4 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:52:35,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:52:35,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 296 [2023-11-06 22:52:35,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:52:35,371 INFO L124 PetriNetUnfolderBase]: 704/1321 cut-off events. [2023-11-06 22:52:35,371 INFO L125 PetriNetUnfolderBase]: For 28423/28423 co-relation queries the response was YES. [2023-11-06 22:52:35,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10126 conditions, 1321 events. 704/1321 cut-off events. For 28423/28423 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 6744 event pairs, 191 based on Foata normal form. 164/1485 useless extension candidates. Maximal degree in co-relation 10061. Up to 588 conditions per place. [2023-11-06 22:52:35,382 INFO L140 encePairwiseOnDemand]: 292/296 looper letters, 151 selfloop transitions, 33 changer transitions 0/184 dead transitions. [2023-11-06 22:52:35,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 184 transitions, 3140 flow [2023-11-06 22:52:35,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:52:35,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:52:35,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 591 transitions. [2023-11-06 22:52:35,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49915540540540543 [2023-11-06 22:52:35,384 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 591 transitions. [2023-11-06 22:52:35,384 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 591 transitions. [2023-11-06 22:52:35,385 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:52:35,385 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 591 transitions. [2023-11-06 22:52:35,385 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 147.75) internal successors, (591), 4 states have internal predecessors, (591), 0 states have call successors, (0), 0 states 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 22:52:35,386 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 296.0) internal successors, (1480), 5 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states 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 22:52:35,386 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 296.0) internal successors, (1480), 5 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states 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 22:52:35,386 INFO L175 Difference]: Start difference. First operand has 199 places, 220 transitions, 3523 flow. Second operand 4 states and 591 transitions. [2023-11-06 22:52:35,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 184 transitions, 3140 flow [2023-11-06 22:52:35,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 184 transitions, 2786 flow, removed 60 selfloop flow, removed 21 redundant places. [2023-11-06 22:52:35,475 INFO L231 Difference]: Finished difference. Result has 162 places, 174 transitions, 2440 flow [2023-11-06 22:52:35,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=2340, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2440, PETRI_PLACES=162, PETRI_TRANSITIONS=174} [2023-11-06 22:52:35,476 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 133 predicate places. [2023-11-06 22:52:35,476 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 174 transitions, 2440 flow [2023-11-06 22:52:35,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 143.5) internal successors, (574), 4 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:52:35,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:52:35,476 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] [2023-11-06 22:52:35,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-11-06 22:52:35,477 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 22:52:35,477 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:52:35,477 INFO L85 PathProgramCache]: Analyzing trace with hash -2018029652, now seen corresponding path program 2 times [2023-11-06 22:52:35,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:52:35,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626707611] [2023-11-06 22:52:35,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:35,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:52:35,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:52:40,247 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 22:52:40,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:52:40,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626707611] [2023-11-06 22:52:40,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626707611] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:52:40,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098017976] [2023-11-06 22:52:40,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:52:40,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:40,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:52:40,249 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:52:40,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-06 22:52:40,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:52:40,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:52:40,414 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-06 22:52:40,415 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:52:40,794 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 22:52:40,794 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:52:40,993 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:52:40,993 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 58 treesize of output 60 [2023-11-06 22:52:41,770 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 22:52:41,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098017976] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:52:41,770 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:52:41,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8] total 27 [2023-11-06 22:52:41,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544295091] [2023-11-06 22:52:41,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:52:41,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-06 22:52:41,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:52:41,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-06 22:52:41,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2023-11-06 22:52:45,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 296 [2023-11-06 22:52:45,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 174 transitions, 2440 flow. Second operand has 29 states, 29 states have (on average 109.17241379310344) internal successors, (3166), 29 states have internal predecessors, (3166), 0 states have call successors, (0), 0 states 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 22:52:45,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:52:45,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 296 [2023-11-06 22:52:45,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:52:51,395 INFO L124 PetriNetUnfolderBase]: 1036/1791 cut-off events. [2023-11-06 22:52:51,396 INFO L125 PetriNetUnfolderBase]: For 27699/27699 co-relation queries the response was YES. [2023-11-06 22:52:51,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13331 conditions, 1791 events. 1036/1791 cut-off events. For 27699/27699 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 9014 event pairs, 126 based on Foata normal form. 2/1793 useless extension candidates. Maximal degree in co-relation 13273. Up to 352 conditions per place. [2023-11-06 22:52:51,409 INFO L140 encePairwiseOnDemand]: 283/296 looper letters, 205 selfloop transitions, 140 changer transitions 26/371 dead transitions. [2023-11-06 22:52:51,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 371 transitions, 5198 flow [2023-11-06 22:52:51,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-06 22:52:51,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-06 22:52:51,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 3446 transitions. [2023-11-06 22:52:51,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38806306306306304 [2023-11-06 22:52:51,414 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 3446 transitions. [2023-11-06 22:52:51,414 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 3446 transitions. [2023-11-06 22:52:51,415 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:52:51,415 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 3446 transitions. [2023-11-06 22:52:51,418 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 114.86666666666666) internal successors, (3446), 30 states have internal predecessors, (3446), 0 states have call successors, (0), 0 states 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 22:52:51,425 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 296.0) internal successors, (9176), 31 states have internal predecessors, (9176), 0 states have call successors, (0), 0 states 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 22:52:51,427 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 296.0) internal successors, (9176), 31 states have internal predecessors, (9176), 0 states have call successors, (0), 0 states 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 22:52:51,427 INFO L175 Difference]: Start difference. First operand has 162 places, 174 transitions, 2440 flow. Second operand 30 states and 3446 transitions. [2023-11-06 22:52:51,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 371 transitions, 5198 flow [2023-11-06 22:52:51,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 371 transitions, 5016 flow, removed 52 selfloop flow, removed 5 redundant places. [2023-11-06 22:52:51,543 INFO L231 Difference]: Finished difference. Result has 202 places, 241 transitions, 3951 flow [2023-11-06 22:52:51,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=2364, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=3951, PETRI_PLACES=202, PETRI_TRANSITIONS=241} [2023-11-06 22:52:51,544 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 173 predicate places. [2023-11-06 22:52:51,544 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 241 transitions, 3951 flow [2023-11-06 22:52:51,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 109.17241379310344) internal successors, (3166), 29 states have internal predecessors, (3166), 0 states have call successors, (0), 0 states 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 22:52:51,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:52:51,544 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] [2023-11-06 22:52:51,549 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-06 22:52:51,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-06 22:52:51,745 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 22:52:51,745 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:52:51,745 INFO L85 PathProgramCache]: Analyzing trace with hash -378896496, now seen corresponding path program 3 times [2023-11-06 22:52:51,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:52:51,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779509674] [2023-11-06 22:52:51,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:51,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:52:51,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:52:56,394 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 22:52:56,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:52:56,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779509674] [2023-11-06 22:52:56,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779509674] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:52:56,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213325102] [2023-11-06 22:52:56,395 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:52:56,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:56,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:52:56,396 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:52:56,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-06 22:52:56,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 22:52:56,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:52:56,563 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-06 22:52:56,566 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:52:56,731 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 22:52:56,840 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 22:52:56,916 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 22:52:56,981 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 22:52:57,558 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 22:52:57,558 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:52:59,613 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:52:59,613 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 134 treesize of output 98 [2023-11-06 22:52:59,680 INFO L322 Elim1Store]: treesize reduction 13, result has 64.9 percent of original size [2023-11-06 22:52:59,681 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 3948 treesize of output 3699 [2023-11-06 22:52:59,727 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 22:52:59,731 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 22:52:59,755 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:52:59,756 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 328 treesize of output 322 [2023-11-06 22:52:59,824 INFO L322 Elim1Store]: treesize reduction 16, result has 56.8 percent of original size [2023-11-06 22:52:59,824 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 416 treesize of output 332 [2023-11-06 22:52:59,897 INFO L322 Elim1Store]: treesize reduction 16, result has 56.8 percent of original size [2023-11-06 22:52:59,898 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 249 treesize of output 217 [2023-11-06 22:53:01,478 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 22:53:01,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213325102] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:53:01,478 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:53:01,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 39 [2023-11-06 22:53:01,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104416671] [2023-11-06 22:53:01,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:53:01,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-11-06 22:53:01,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:53:01,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-11-06 22:53:01,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1426, Unknown=6, NotChecked=0, Total=1640 [2023-11-06 22:53:04,266 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 22:53:09,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 296 [2023-11-06 22:53:09,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 241 transitions, 3951 flow. Second operand has 41 states, 41 states have (on average 89.6829268292683) internal successors, (3677), 41 states have internal predecessors, (3677), 0 states have call successors, (0), 0 states 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 22:53:09,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:53:09,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 296 [2023-11-06 22:53:09,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:53:14,421 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:53:18,232 WARN L539 Checker$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 22:53:38,062 WARN L293 SmtUtils]: Spent 9.29s on a formula simplification. DAG size of input: 264 DAG size of output: 218 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-06 22:53:41,385 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:53:48,173 INFO L124 PetriNetUnfolderBase]: 1736/2908 cut-off events. [2023-11-06 22:53:48,173 INFO L125 PetriNetUnfolderBase]: For 54148/54148 co-relation queries the response was YES. [2023-11-06 22:53:48,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23761 conditions, 2908 events. 1736/2908 cut-off events. For 54148/54148 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 16025 event pairs, 215 based on Foata normal form. 3/2911 useless extension candidates. Maximal degree in co-relation 23690. Up to 687 conditions per place. [2023-11-06 22:53:48,217 INFO L140 encePairwiseOnDemand]: 283/296 looper letters, 445 selfloop transitions, 236 changer transitions 33/714 dead transitions. [2023-11-06 22:53:48,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 714 transitions, 12280 flow [2023-11-06 22:53:48,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-11-06 22:53:48,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-11-06 22:53:48,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 4249 transitions. [2023-11-06 22:53:48,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.318993993993994 [2023-11-06 22:53:48,227 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 4249 transitions. [2023-11-06 22:53:48,227 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 4249 transitions. [2023-11-06 22:53:48,229 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:53:48,229 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 4249 transitions. [2023-11-06 22:53:48,236 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 94.42222222222222) internal successors, (4249), 45 states have internal predecessors, (4249), 0 states have call successors, (0), 0 states 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 22:53:48,248 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 296.0) internal successors, (13616), 46 states have internal predecessors, (13616), 0 states have call successors, (0), 0 states 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 22:53:48,250 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 296.0) internal successors, (13616), 46 states have internal predecessors, (13616), 0 states have call successors, (0), 0 states 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 22:53:48,251 INFO L175 Difference]: Start difference. First operand has 202 places, 241 transitions, 3951 flow. Second operand 45 states and 4249 transitions. [2023-11-06 22:53:48,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 714 transitions, 12280 flow [2023-11-06 22:53:48,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 714 transitions, 11121 flow, removed 474 selfloop flow, removed 18 redundant places. [2023-11-06 22:53:48,670 INFO L231 Difference]: Finished difference. Result has 254 places, 410 transitions, 7781 flow [2023-11-06 22:53:48,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=3543, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=7781, PETRI_PLACES=254, PETRI_TRANSITIONS=410} [2023-11-06 22:53:48,671 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 225 predicate places. [2023-11-06 22:53:48,671 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 410 transitions, 7781 flow [2023-11-06 22:53:48,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 89.6829268292683) internal successors, (3677), 41 states have internal predecessors, (3677), 0 states have call successors, (0), 0 states 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 22:53:48,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:53:48,672 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] [2023-11-06 22:53:48,679 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-06 22:53:48,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-06 22:53:48,873 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 22:53:48,874 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:53:48,874 INFO L85 PathProgramCache]: Analyzing trace with hash 533833518, now seen corresponding path program 4 times [2023-11-06 22:53:48,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:53:48,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247238872] [2023-11-06 22:53:48,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:53:48,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:53:48,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:53:50,531 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 22:53:50,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:53:50,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247238872] [2023-11-06 22:53:50,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247238872] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:53:50,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169435237] [2023-11-06 22:53:50,532 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:53:50,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:53:50,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:53:50,533 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:53:50,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd6dc348-9ae8-454c-a84b-47bc50aae420/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-06 22:53:50,681 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:53:50,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:53:50,683 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 42 conjunts are in the unsatisfiable core [2023-11-06 22:53:50,685 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:53:50,804 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 22:53:50,865 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 22:53:50,915 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 22:53:50,958 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 22:53:51,303 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 22:53:51,303 INFO L327 TraceCheckSpWp]: Computing backward predicates...