./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/parallel-parallel-sum-equiv.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100260ed-47f9-483d-a964-817eb02b450b/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100260ed-47f9-483d-a964-817eb02b450b/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_100260ed-47f9-483d-a964-817eb02b450b/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100260ed-47f9-483d-a964-817eb02b450b/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/parallel-parallel-sum-equiv.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100260ed-47f9-483d-a964-817eb02b450b/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_100260ed-47f9-483d-a964-817eb02b450b/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 d721a74d879c75d156b7dfbd9383140c70ef6831602ea84a0f8988cd7fdc0c32 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:42:38,702 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:42:38,784 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100260ed-47f9-483d-a964-817eb02b450b/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:42:38,790 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:42:38,790 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:42:38,815 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:42:38,816 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:42:38,817 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:42:38,817 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:42:38,818 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:42:38,819 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:42:38,820 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:42:38,820 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:42:38,821 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:42:38,821 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:42:38,822 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:42:38,822 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:42:38,823 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:42:38,823 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:42:38,824 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:42:38,824 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:42:38,825 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:42:38,825 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:42:38,826 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:42:38,826 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:42:38,827 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:42:38,827 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:42:38,828 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:42:38,828 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:42:38,829 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:42:38,829 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:42:38,829 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:42:38,830 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:42:38,830 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:42:38,831 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:42:38,831 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:42:38,831 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:42:38,832 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:42:38,832 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:42:38,833 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_100260ed-47f9-483d-a964-817eb02b450b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100260ed-47f9-483d-a964-817eb02b450b/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d721a74d879c75d156b7dfbd9383140c70ef6831602ea84a0f8988cd7fdc0c32 [2023-11-06 22:42:39,077 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:42:39,113 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:42:39,116 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:42:39,118 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:42:39,118 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:42:39,119 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100260ed-47f9-483d-a964-817eb02b450b/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/parallel-parallel-sum-equiv.wvr.c [2023-11-06 22:42:42,169 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:42:42,489 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:42:42,490 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100260ed-47f9-483d-a964-817eb02b450b/sv-benchmarks/c/weaver/parallel-parallel-sum-equiv.wvr.c [2023-11-06 22:42:42,502 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100260ed-47f9-483d-a964-817eb02b450b/bin/uautomizer-verify-WvqO1wxjHP/data/c5ff41f7f/80ad08c00d69489988dd54f07bf79191/FLAG6dfddf080 [2023-11-06 22:42:42,520 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100260ed-47f9-483d-a964-817eb02b450b/bin/uautomizer-verify-WvqO1wxjHP/data/c5ff41f7f/80ad08c00d69489988dd54f07bf79191 [2023-11-06 22:42:42,528 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:42:42,530 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:42:42,532 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:42:42,532 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:42:42,538 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:42:42,541 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:42:42" (1/1) ... [2023-11-06 22:42:42,542 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1207eb29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:42, skipping insertion in model container [2023-11-06 22:42:42,543 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:42:42" (1/1) ... [2023-11-06 22:42:42,586 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:42:42,828 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_100260ed-47f9-483d-a964-817eb02b450b/sv-benchmarks/c/weaver/parallel-parallel-sum-equiv.wvr.c[3770,3783] [2023-11-06 22:42:42,841 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:42:42,856 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:42:42,885 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_100260ed-47f9-483d-a964-817eb02b450b/sv-benchmarks/c/weaver/parallel-parallel-sum-equiv.wvr.c[3770,3783] [2023-11-06 22:42:42,899 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:42:42,914 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:42:42,917 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:42:42,926 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:42:42,927 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:42 WrapperNode [2023-11-06 22:42:42,927 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:42:42,929 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:42:42,929 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:42:42,929 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:42:42,938 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:42" (1/1) ... [2023-11-06 22:42:42,951 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:42" (1/1) ... [2023-11-06 22:42:42,989 INFO L138 Inliner]: procedures = 27, calls = 73, calls flagged for inlining = 18, calls inlined = 22, statements flattened = 257 [2023-11-06 22:42:42,989 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:42:42,990 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:42:42,990 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:42:42,990 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:42:43,004 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:42" (1/1) ... [2023-11-06 22:42:43,004 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:42" (1/1) ... [2023-11-06 22:42:43,026 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:42" (1/1) ... [2023-11-06 22:42:43,027 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:42" (1/1) ... [2023-11-06 22:42:43,037 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:42" (1/1) ... [2023-11-06 22:42:43,041 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:42" (1/1) ... [2023-11-06 22:42:43,044 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:42" (1/1) ... [2023-11-06 22:42:43,046 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:42" (1/1) ... [2023-11-06 22:42:43,051 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:42:43,052 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:42:43,052 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:42:43,052 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:42:43,053 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:42" (1/1) ... [2023-11-06 22:42:43,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:42:43,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100260ed-47f9-483d-a964-817eb02b450b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:42:43,138 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100260ed-47f9-483d-a964-817eb02b450b/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:42:43,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100260ed-47f9-483d-a964-817eb02b450b/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:42:43,188 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:42:43,188 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:42:43,189 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 22:42:43,190 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 22:42:43,190 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-06 22:42:43,190 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-06 22:42:43,190 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-06 22:42:43,191 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-06 22:42:43,191 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-06 22:42:43,191 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-06 22:42:43,191 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-11-06 22:42:43,193 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-11-06 22:42:43,194 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:42:43,194 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-06 22:42:43,195 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-06 22:42:43,195 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 22:42:43,195 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:42:43,195 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:42:43,196 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:42:43,198 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 22:42:43,356 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:42:43,359 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:42:43,940 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:42:44,181 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:42:44,182 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-06 22:42:44,185 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:42:44 BoogieIcfgContainer [2023-11-06 22:42:44,185 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:42:44,188 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:42:44,188 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:42:44,191 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:42:44,214 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:42:42" (1/3) ... [2023-11-06 22:42:44,215 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5759b49c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:42:44, skipping insertion in model container [2023-11-06 22:42:44,216 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:42" (2/3) ... [2023-11-06 22:42:44,218 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5759b49c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:42:44, skipping insertion in model container [2023-11-06 22:42:44,218 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:42:44" (3/3) ... [2023-11-06 22:42:44,220 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-parallel-sum-equiv.wvr.c [2023-11-06 22:42:44,230 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-06 22:42:44,242 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:42:44,242 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:42:44,243 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 22:42:44,369 INFO L144 ThreadInstanceAdder]: Constructed 10 joinOtherThreadTransitions. [2023-11-06 22:42:44,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 213 places, 214 transitions, 468 flow [2023-11-06 22:42:44,522 INFO L124 PetriNetUnfolderBase]: 14/199 cut-off events. [2023-11-06 22:42:44,522 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-06 22:42:44,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 218 conditions, 199 events. 14/199 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 181 event pairs, 0 based on Foata normal form. 0/184 useless extension candidates. Maximal degree in co-relation 170. Up to 3 conditions per place. [2023-11-06 22:42:44,529 INFO L82 GeneralOperation]: Start removeDead. Operand has 213 places, 214 transitions, 468 flow [2023-11-06 22:42:44,536 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 189 places, 190 transitions, 410 flow [2023-11-06 22:42:44,540 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:42:44,552 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 189 places, 190 transitions, 410 flow [2023-11-06 22:42:44,555 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 189 places, 190 transitions, 410 flow [2023-11-06 22:42:44,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 189 places, 190 transitions, 410 flow [2023-11-06 22:42:44,627 INFO L124 PetriNetUnfolderBase]: 14/190 cut-off events. [2023-11-06 22:42:44,627 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-06 22:42:44,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 209 conditions, 190 events. 14/190 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 180 event pairs, 0 based on Foata normal form. 0/176 useless extension candidates. Maximal degree in co-relation 170. Up to 3 conditions per place. [2023-11-06 22:42:44,633 INFO L119 LiptonReduction]: Number of co-enabled transitions 2880 [2023-11-06 22:42:52,334 INFO L134 LiptonReduction]: Checked pairs total: 7827 [2023-11-06 22:42:52,335 INFO L136 LiptonReduction]: Total number of compositions: 178 [2023-11-06 22:42:52,353 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:42:52,360 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;@4e702bc0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:42:52,361 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-06 22:42:52,371 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:42:52,371 INFO L124 PetriNetUnfolderBase]: 6/38 cut-off events. [2023-11-06 22:42:52,371 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-06 22:42:52,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:42:52,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:42:52,373 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err4INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-06 22:42:52,379 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:42:52,379 INFO L85 PathProgramCache]: Analyzing trace with hash -196737576, now seen corresponding path program 1 times [2023-11-06 22:42:52,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:42:52,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288135746] [2023-11-06 22:42:52,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:52,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:42:52,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:42:53,005 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 22:42:53,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:42:53,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288135746] [2023-11-06 22:42:53,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288135746] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:42:53,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:42:53,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:42:53,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008975459] [2023-11-06 22:42:53,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:42:53,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:42:53,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:42:53,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:42:53,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:42:53,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 394 [2023-11-06 22:42:53,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 108 flow. Second operand has 4 states, 4 states have (on average 183.5) internal successors, (734), 4 states have internal predecessors, (734), 0 states have call successors, (0), 0 states 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 22:42:53,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:42:53,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 394 [2023-11-06 22:42:53,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:42:53,724 INFO L124 PetriNetUnfolderBase]: 1658/2373 cut-off events. [2023-11-06 22:42:53,724 INFO L125 PetriNetUnfolderBase]: For 361/374 co-relation queries the response was YES. [2023-11-06 22:42:53,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5097 conditions, 2373 events. 1658/2373 cut-off events. For 361/374 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 9911 event pairs, 417 based on Foata normal form. 5/1788 useless extension candidates. Maximal degree in co-relation 4996. Up to 1081 conditions per place. [2023-11-06 22:42:53,755 INFO L140 encePairwiseOnDemand]: 388/394 looper letters, 67 selfloop transitions, 7 changer transitions 1/84 dead transitions. [2023-11-06 22:42:53,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 84 transitions, 396 flow [2023-11-06 22:42:53,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:42:53,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:42:53,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 788 transitions. [2023-11-06 22:42:53,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-11-06 22:42:53,785 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 788 transitions. [2023-11-06 22:42:53,786 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 788 transitions. [2023-11-06 22:42:53,791 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:42:53,795 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 788 transitions. [2023-11-06 22:42:53,802 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 0 states have call successors, (0), 0 states 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 22:42:53,813 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 394.0) internal successors, (1970), 5 states have internal predecessors, (1970), 0 states have call successors, (0), 0 states 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 22:42:53,815 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 394.0) internal successors, (1970), 5 states have internal predecessors, (1970), 0 states have call successors, (0), 0 states 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 22:42:53,817 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 108 flow. Second operand 4 states and 788 transitions. [2023-11-06 22:42:53,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 84 transitions, 396 flow [2023-11-06 22:42:53,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 84 transitions, 344 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-11-06 22:42:53,831 INFO L231 Difference]: Finished difference. Result has 43 places, 45 transitions, 133 flow [2023-11-06 22:42:53,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=394, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=133, PETRI_PLACES=43, PETRI_TRANSITIONS=45} [2023-11-06 22:42:53,841 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, -3 predicate places. [2023-11-06 22:42:53,841 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 45 transitions, 133 flow [2023-11-06 22:42:53,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 183.5) internal successors, (734), 4 states have internal predecessors, (734), 0 states have call successors, (0), 0 states 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 22:42:53,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:42:53,843 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:42:53,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:42:53,844 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err4INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-06 22:42:53,844 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:42:53,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1837175372, now seen corresponding path program 2 times [2023-11-06 22:42:53,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:42:53,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610092195] [2023-11-06 22:42:53,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:53,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:42:53,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:42:54,065 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 22:42:54,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:42:54,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610092195] [2023-11-06 22:42:54,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610092195] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:42:54,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:42:54,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:42:54,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757909971] [2023-11-06 22:42:54,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:42:54,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:42:54,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:42:54,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:42:54,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:42:54,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 394 [2023-11-06 22:42:54,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 45 transitions, 133 flow. Second operand has 4 states, 4 states have (on average 183.5) internal successors, (734), 4 states have internal predecessors, (734), 0 states have call successors, (0), 0 states 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 22:42:54,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:42:54,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 394 [2023-11-06 22:42:54,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:42:54,694 INFO L124 PetriNetUnfolderBase]: 2346/3400 cut-off events. [2023-11-06 22:42:54,694 INFO L125 PetriNetUnfolderBase]: For 765/765 co-relation queries the response was YES. [2023-11-06 22:42:54,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8019 conditions, 3400 events. 2346/3400 cut-off events. For 765/765 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 15138 event pairs, 975 based on Foata normal form. 1/2824 useless extension candidates. Maximal degree in co-relation 3911. Up to 1875 conditions per place. [2023-11-06 22:42:54,722 INFO L140 encePairwiseOnDemand]: 388/394 looper letters, 71 selfloop transitions, 8 changer transitions 1/89 dead transitions. [2023-11-06 22:42:54,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 89 transitions, 416 flow [2023-11-06 22:42:54,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:42:54,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:42:54,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 787 transitions. [2023-11-06 22:42:54,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4993654822335025 [2023-11-06 22:42:54,729 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 787 transitions. [2023-11-06 22:42:54,730 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 787 transitions. [2023-11-06 22:42:54,731 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:42:54,731 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 787 transitions. [2023-11-06 22:42:54,733 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 196.75) internal successors, (787), 4 states have internal predecessors, (787), 0 states have call successors, (0), 0 states 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 22:42:54,737 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 394.0) internal successors, (1970), 5 states have internal predecessors, (1970), 0 states have call successors, (0), 0 states 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 22:42:54,740 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 394.0) internal successors, (1970), 5 states have internal predecessors, (1970), 0 states have call successors, (0), 0 states 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 22:42:54,740 INFO L175 Difference]: Start difference. First operand has 43 places, 45 transitions, 133 flow. Second operand 4 states and 787 transitions. [2023-11-06 22:42:54,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 89 transitions, 416 flow [2023-11-06 22:42:54,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 89 transitions, 416 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 22:42:54,754 INFO L231 Difference]: Finished difference. Result has 48 places, 50 transitions, 193 flow [2023-11-06 22:42:54,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=394, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=193, PETRI_PLACES=48, PETRI_TRANSITIONS=50} [2023-11-06 22:42:54,755 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 2 predicate places. [2023-11-06 22:42:54,755 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 50 transitions, 193 flow [2023-11-06 22:42:54,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 183.5) internal successors, (734), 4 states have internal predecessors, (734), 0 states have call successors, (0), 0 states 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 22:42:54,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:42:54,756 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:42:54,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 22:42:54,757 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err4INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-06 22:42:54,759 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:42:54,759 INFO L85 PathProgramCache]: Analyzing trace with hash -258620574, now seen corresponding path program 1 times [2023-11-06 22:42:54,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:42:54,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155333469] [2023-11-06 22:42:54,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:54,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:42:54,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:42:55,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:42:55,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:42:55,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155333469] [2023-11-06 22:42:55,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155333469] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:42:55,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:42:55,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:42:55,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132040512] [2023-11-06 22:42:55,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:42:55,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:42:55,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:42:55,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:42:55,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:42:55,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 394 [2023-11-06 22:42:55,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 50 transitions, 193 flow. Second operand has 5 states, 5 states have (on average 176.6) internal successors, (883), 5 states have internal predecessors, (883), 0 states have call successors, (0), 0 states 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 22:42:55,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:42:55,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 394 [2023-11-06 22:42:55,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:42:55,973 INFO L124 PetriNetUnfolderBase]: 3817/5653 cut-off events. [2023-11-06 22:42:55,974 INFO L125 PetriNetUnfolderBase]: For 4382/4382 co-relation queries the response was YES. [2023-11-06 22:42:55,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14372 conditions, 5653 events. 3817/5653 cut-off events. For 4382/4382 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 28620 event pairs, 2160 based on Foata normal form. 186/4846 useless extension candidates. Maximal degree in co-relation 8344. Up to 3221 conditions per place. [2023-11-06 22:42:56,026 INFO L140 encePairwiseOnDemand]: 389/394 looper letters, 90 selfloop transitions, 5 changer transitions 0/104 dead transitions. [2023-11-06 22:42:56,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 104 transitions, 574 flow [2023-11-06 22:42:56,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:42:56,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:42:56,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 938 transitions. [2023-11-06 22:42:56,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4761421319796954 [2023-11-06 22:42:56,031 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 938 transitions. [2023-11-06 22:42:56,032 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 938 transitions. [2023-11-06 22:42:56,033 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:42:56,033 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 938 transitions. [2023-11-06 22:42:56,036 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 187.6) internal successors, (938), 5 states have internal predecessors, (938), 0 states have call successors, (0), 0 states 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 22:42:56,041 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 394.0) internal successors, (2364), 6 states have internal predecessors, (2364), 0 states have call successors, (0), 0 states 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 22:42:56,043 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 394.0) internal successors, (2364), 6 states have internal predecessors, (2364), 0 states have call successors, (0), 0 states 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 22:42:56,044 INFO L175 Difference]: Start difference. First operand has 48 places, 50 transitions, 193 flow. Second operand 5 states and 938 transitions. [2023-11-06 22:42:56,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 104 transitions, 574 flow [2023-11-06 22:42:56,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 104 transitions, 572 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-11-06 22:42:56,057 INFO L231 Difference]: Finished difference. Result has 55 places, 54 transitions, 243 flow [2023-11-06 22:42:56,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=394, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=243, PETRI_PLACES=55, PETRI_TRANSITIONS=54} [2023-11-06 22:42:56,059 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 9 predicate places. [2023-11-06 22:42:56,063 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 54 transitions, 243 flow [2023-11-06 22:42:56,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 176.6) internal successors, (883), 5 states have internal predecessors, (883), 0 states have call successors, (0), 0 states 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 22:42:56,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:42:56,065 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:42:56,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 22:42:56,065 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err4INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-06 22:42:56,066 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:42:56,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1158661143, now seen corresponding path program 1 times [2023-11-06 22:42:56,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:42:56,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361482685] [2023-11-06 22:42:56,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:56,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:42:56,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:42:56,303 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:42:56,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:42:56,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361482685] [2023-11-06 22:42:56,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361482685] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:42:56,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311836411] [2023-11-06 22:42:56,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:56,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:42:56,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100260ed-47f9-483d-a964-817eb02b450b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:42:56,312 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100260ed-47f9-483d-a964-817eb02b450b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:42:56,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100260ed-47f9-483d-a964-817eb02b450b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:42:56,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:42:56,482 INFO L262 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 22:42:56,488 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:42:56,594 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:42:56,594 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:42:56,665 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:42:56,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311836411] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:42:56,665 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:42:56,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-06 22:42:56,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799319395] [2023-11-06 22:42:56,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:42:56,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:42:56,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:42:56,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:42:56,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:42:56,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 394 [2023-11-06 22:42:56,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 54 transitions, 243 flow. Second operand has 12 states, 12 states have (on average 172.83333333333334) internal successors, (2074), 12 states have internal predecessors, (2074), 0 states have call successors, (0), 0 states 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 22:42:56,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:42:56,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 394 [2023-11-06 22:42:56,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:42:58,203 INFO L124 PetriNetUnfolderBase]: 5288/7788 cut-off events. [2023-11-06 22:42:58,203 INFO L125 PetriNetUnfolderBase]: For 8771/8771 co-relation queries the response was YES. [2023-11-06 22:42:58,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20358 conditions, 7788 events. 5288/7788 cut-off events. For 8771/8771 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 42121 event pairs, 2005 based on Foata normal form. 186/6591 useless extension candidates. Maximal degree in co-relation 14668. Up to 2692 conditions per place. [2023-11-06 22:42:58,276 INFO L140 encePairwiseOnDemand]: 388/394 looper letters, 115 selfloop transitions, 10 changer transitions 0/134 dead transitions. [2023-11-06 22:42:58,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 134 transitions, 797 flow [2023-11-06 22:42:58,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 22:42:58,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 22:42:58,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1289 transitions. [2023-11-06 22:42:58,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46736765772298766 [2023-11-06 22:42:58,282 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1289 transitions. [2023-11-06 22:42:58,282 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1289 transitions. [2023-11-06 22:42:58,283 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:42:58,283 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1289 transitions. [2023-11-06 22:42:58,287 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 184.14285714285714) internal successors, (1289), 7 states have internal predecessors, (1289), 0 states have call successors, (0), 0 states 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 22:42:58,294 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 394.0) internal successors, (3152), 8 states have internal predecessors, (3152), 0 states have call successors, (0), 0 states 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 22:42:58,297 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 394.0) internal successors, (3152), 8 states have internal predecessors, (3152), 0 states have call successors, (0), 0 states 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 22:42:58,297 INFO L175 Difference]: Start difference. First operand has 55 places, 54 transitions, 243 flow. Second operand 7 states and 1289 transitions. [2023-11-06 22:42:58,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 134 transitions, 797 flow [2023-11-06 22:42:58,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 134 transitions, 793 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-06 22:42:58,319 INFO L231 Difference]: Finished difference. Result has 64 places, 59 transitions, 321 flow [2023-11-06 22:42:58,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=394, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=321, PETRI_PLACES=64, PETRI_TRANSITIONS=59} [2023-11-06 22:42:58,321 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 18 predicate places. [2023-11-06 22:42:58,321 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 59 transitions, 321 flow [2023-11-06 22:42:58,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 172.83333333333334) internal successors, (2074), 12 states have internal predecessors, (2074), 0 states have call successors, (0), 0 states 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 22:42:58,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:42:58,323 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:42:58,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100260ed-47f9-483d-a964-817eb02b450b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:42:58,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100260ed-47f9-483d-a964-817eb02b450b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:42:58,533 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err4INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-06 22:42:58,534 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:42:58,534 INFO L85 PathProgramCache]: Analyzing trace with hash -713495, now seen corresponding path program 1 times [2023-11-06 22:42:58,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:42:58,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745113885] [2023-11-06 22:42:58,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:58,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:42:58,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:42:58,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:42:58,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:42:58,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745113885] [2023-11-06 22:42:58,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745113885] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:42:58,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:42:58,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:42:58,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213483213] [2023-11-06 22:42:58,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:42:58,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:42:58,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:42:58,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:42:58,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:42:58,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 394 [2023-11-06 22:42:58,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 59 transitions, 321 flow. Second operand has 5 states, 5 states have (on average 176.8) internal successors, (884), 5 states have internal predecessors, (884), 0 states have call successors, (0), 0 states 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 22:42:58,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:42:58,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 394 [2023-11-06 22:42:58,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:42:59,843 INFO L124 PetriNetUnfolderBase]: 4174/6382 cut-off events. [2023-11-06 22:42:59,843 INFO L125 PetriNetUnfolderBase]: For 10186/10186 co-relation queries the response was YES. [2023-11-06 22:42:59,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17857 conditions, 6382 events. 4174/6382 cut-off events. For 10186/10186 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 34185 event pairs, 2918 based on Foata normal form. 0/5339 useless extension candidates. Maximal degree in co-relation 12566. Up to 5314 conditions per place. [2023-11-06 22:42:59,888 INFO L140 encePairwiseOnDemand]: 388/394 looper letters, 45 selfloop transitions, 2 changer transitions 28/84 dead transitions. [2023-11-06 22:42:59,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 84 transitions, 548 flow [2023-11-06 22:42:59,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:42:59,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:42:59,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 920 transitions. [2023-11-06 22:42:59,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.467005076142132 [2023-11-06 22:42:59,893 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 920 transitions. [2023-11-06 22:42:59,893 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 920 transitions. [2023-11-06 22:42:59,894 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:42:59,894 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 920 transitions. [2023-11-06 22:42:59,899 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 184.0) internal successors, (920), 5 states have internal predecessors, (920), 0 states have call successors, (0), 0 states 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 22:42:59,904 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 394.0) internal successors, (2364), 6 states have internal predecessors, (2364), 0 states have call successors, (0), 0 states 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 22:42:59,905 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 394.0) internal successors, (2364), 6 states have internal predecessors, (2364), 0 states have call successors, (0), 0 states 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 22:42:59,905 INFO L175 Difference]: Start difference. First operand has 64 places, 59 transitions, 321 flow. Second operand 5 states and 920 transitions. [2023-11-06 22:42:59,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 84 transitions, 548 flow [2023-11-06 22:42:59,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 84 transitions, 527 flow, removed 8 selfloop flow, removed 2 redundant places. [2023-11-06 22:42:59,924 INFO L231 Difference]: Finished difference. Result has 68 places, 56 transitions, 274 flow [2023-11-06 22:42:59,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=394, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=274, PETRI_PLACES=68, PETRI_TRANSITIONS=56} [2023-11-06 22:42:59,927 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 22 predicate places. [2023-11-06 22:42:59,927 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 56 transitions, 274 flow [2023-11-06 22:42:59,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 176.8) internal successors, (884), 5 states have internal predecessors, (884), 0 states have call successors, (0), 0 states 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 22:42:59,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:42:59,928 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:42:59,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 22:42:59,929 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err4INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-06 22:42:59,929 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:42:59,929 INFO L85 PathProgramCache]: Analyzing trace with hash 2144721410, now seen corresponding path program 2 times [2023-11-06 22:42:59,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:42:59,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806622950] [2023-11-06 22:42:59,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:59,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:42:59,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:43:00,177 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:43:00,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:43:00,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806622950] [2023-11-06 22:43:00,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806622950] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:43:00,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064150793] [2023-11-06 22:43:00,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:43:00,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:43:00,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100260ed-47f9-483d-a964-817eb02b450b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:43:00,179 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100260ed-47f9-483d-a964-817eb02b450b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:43:00,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100260ed-47f9-483d-a964-817eb02b450b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:43:00,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:43:00,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:43:00,334 INFO L262 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 22:43:00,341 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:43:00,436 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:43:00,436 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:43:00,535 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:43:00,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064150793] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:43:00,536 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:43:00,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-06 22:43:00,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189566032] [2023-11-06 22:43:00,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:43:00,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:43:00,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:43:00,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:43:00,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:43:00,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 394 [2023-11-06 22:43:00,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 56 transitions, 274 flow. Second operand has 12 states, 12 states have (on average 173.91666666666666) internal successors, (2087), 12 states have internal predecessors, (2087), 0 states have call successors, (0), 0 states 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 22:43:00,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:43:00,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 394 [2023-11-06 22:43:00,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:43:01,584 INFO L124 PetriNetUnfolderBase]: 3271/4866 cut-off events. [2023-11-06 22:43:01,585 INFO L125 PetriNetUnfolderBase]: For 7390/7390 co-relation queries the response was YES. [2023-11-06 22:43:01,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14387 conditions, 4866 events. 3271/4866 cut-off events. For 7390/7390 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 23964 event pairs, 1845 based on Foata normal form. 96/4780 useless extension candidates. Maximal degree in co-relation 14361. Up to 2271 conditions per place. [2023-11-06 22:43:01,618 INFO L140 encePairwiseOnDemand]: 386/394 looper letters, 82 selfloop transitions, 9 changer transitions 0/100 dead transitions. [2023-11-06 22:43:01,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 100 transitions, 648 flow [2023-11-06 22:43:01,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 22:43:01,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 22:43:01,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1262 transitions. [2023-11-06 22:43:01,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45757795503988397 [2023-11-06 22:43:01,623 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1262 transitions. [2023-11-06 22:43:01,623 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1262 transitions. [2023-11-06 22:43:01,624 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:43:01,624 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1262 transitions. [2023-11-06 22:43:01,628 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 180.28571428571428) internal successors, (1262), 7 states have internal predecessors, (1262), 0 states have call successors, (0), 0 states 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 22:43:01,633 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 394.0) internal successors, (3152), 8 states have internal predecessors, (3152), 0 states have call successors, (0), 0 states 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 22:43:01,635 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 394.0) internal successors, (3152), 8 states have internal predecessors, (3152), 0 states have call successors, (0), 0 states 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 22:43:01,635 INFO L175 Difference]: Start difference. First operand has 68 places, 56 transitions, 274 flow. Second operand 7 states and 1262 transitions. [2023-11-06 22:43:01,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 100 transitions, 648 flow [2023-11-06 22:43:01,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 100 transitions, 632 flow, removed 6 selfloop flow, removed 4 redundant places. [2023-11-06 22:43:01,647 INFO L231 Difference]: Finished difference. Result has 68 places, 60 transitions, 325 flow [2023-11-06 22:43:01,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=394, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=325, PETRI_PLACES=68, PETRI_TRANSITIONS=60} [2023-11-06 22:43:01,648 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 22 predicate places. [2023-11-06 22:43:01,648 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 60 transitions, 325 flow [2023-11-06 22:43:01,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 173.91666666666666) internal successors, (2087), 12 states have internal predecessors, (2087), 0 states have call successors, (0), 0 states 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 22:43:01,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:43:01,649 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:43:01,664 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100260ed-47f9-483d-a964-817eb02b450b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:43:01,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100260ed-47f9-483d-a964-817eb02b450b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:43:01,855 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err4INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-06 22:43:01,856 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:43:01,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1921198756, now seen corresponding path program 1 times [2023-11-06 22:43:01,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:43:01,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610553052] [2023-11-06 22:43:01,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:43:01,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:43:01,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:43:02,024 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:43:02,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:43:02,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610553052] [2023-11-06 22:43:02,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610553052] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:43:02,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392285428] [2023-11-06 22:43:02,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:43:02,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:43:02,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100260ed-47f9-483d-a964-817eb02b450b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:43:02,026 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100260ed-47f9-483d-a964-817eb02b450b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:43:02,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100260ed-47f9-483d-a964-817eb02b450b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:43:02,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:43:02,174 INFO L262 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 22:43:02,176 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:43:02,247 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:43:02,247 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:43:02,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:43:02,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392285428] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:43:02,306 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:43:02,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-06 22:43:02,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679968874] [2023-11-06 22:43:02,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:43:02,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:43:02,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:43:02,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:43:02,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:43:02,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 394 [2023-11-06 22:43:02,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 60 transitions, 325 flow. Second operand has 12 states, 12 states have (on average 173.58333333333334) internal successors, (2083), 12 states have internal predecessors, (2083), 0 states have call successors, (0), 0 states 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 22:43:02,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:43:02,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 394 [2023-11-06 22:43:02,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:43:03,114 INFO L124 PetriNetUnfolderBase]: 2097/3224 cut-off events. [2023-11-06 22:43:03,114 INFO L125 PetriNetUnfolderBase]: For 5581/5581 co-relation queries the response was YES. [2023-11-06 22:43:03,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10236 conditions, 3224 events. 2097/3224 cut-off events. For 5581/5581 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 15219 event pairs, 845 based on Foata normal form. 192/3282 useless extension candidates. Maximal degree in co-relation 8465. Up to 1337 conditions per place. [2023-11-06 22:43:03,137 INFO L140 encePairwiseOnDemand]: 386/394 looper letters, 63 selfloop transitions, 5 changer transitions 28/105 dead transitions. [2023-11-06 22:43:03,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 105 transitions, 708 flow [2023-11-06 22:43:03,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 22:43:03,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 22:43:03,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1266 transitions. [2023-11-06 22:43:03,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45902828136330676 [2023-11-06 22:43:03,143 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1266 transitions. [2023-11-06 22:43:03,144 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1266 transitions. [2023-11-06 22:43:03,145 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:43:03,145 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1266 transitions. [2023-11-06 22:43:03,149 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 180.85714285714286) internal successors, (1266), 7 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states 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 22:43:03,155 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 394.0) internal successors, (3152), 8 states have internal predecessors, (3152), 0 states have call successors, (0), 0 states 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 22:43:03,157 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 394.0) internal successors, (3152), 8 states have internal predecessors, (3152), 0 states have call successors, (0), 0 states 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 22:43:03,157 INFO L175 Difference]: Start difference. First operand has 68 places, 60 transitions, 325 flow. Second operand 7 states and 1266 transitions. [2023-11-06 22:43:03,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 105 transitions, 708 flow [2023-11-06 22:43:03,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 105 transitions, 693 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-11-06 22:43:03,172 INFO L231 Difference]: Finished difference. Result has 73 places, 56 transitions, 292 flow [2023-11-06 22:43:03,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=394, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=292, PETRI_PLACES=73, PETRI_TRANSITIONS=56} [2023-11-06 22:43:03,173 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 27 predicate places. [2023-11-06 22:43:03,174 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 56 transitions, 292 flow [2023-11-06 22:43:03,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 173.58333333333334) internal successors, (2083), 12 states have internal predecessors, (2083), 0 states have call successors, (0), 0 states 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 22:43:03,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:43:03,175 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:43:03,186 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100260ed-47f9-483d-a964-817eb02b450b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:43:03,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100260ed-47f9-483d-a964-817eb02b450b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:43:03,382 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err4INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-06 22:43:03,382 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:43:03,383 INFO L85 PathProgramCache]: Analyzing trace with hash 734353057, now seen corresponding path program 2 times [2023-11-06 22:43:03,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:43:03,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149170542] [2023-11-06 22:43:03,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:43:03,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:43:03,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:43:03,627 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:43:03,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:43:03,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149170542] [2023-11-06 22:43:03,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149170542] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:43:03,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066172724] [2023-11-06 22:43:03,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:43:03,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:43:03,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100260ed-47f9-483d-a964-817eb02b450b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:43:03,635 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100260ed-47f9-483d-a964-817eb02b450b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:43:03,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100260ed-47f9-483d-a964-817eb02b450b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:43:03,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:43:03,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:43:03,806 INFO L262 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 22:43:03,810 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:43:03,892 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:43:03,892 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:43:03,975 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:43:03,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066172724] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:43:03,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:43:03,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 11 [2023-11-06 22:43:03,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111458254] [2023-11-06 22:43:03,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:43:03,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:43:03,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:43:03,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:43:03,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:43:04,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 394 [2023-11-06 22:43:04,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 56 transitions, 292 flow. Second operand has 6 states, 6 states have (on average 174.33333333333334) internal successors, (1046), 6 states have internal predecessors, (1046), 0 states have call successors, (0), 0 states 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 22:43:04,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:43:04,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 394 [2023-11-06 22:43:04,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:43:04,485 INFO L124 PetriNetUnfolderBase]: 1374/2012 cut-off events. [2023-11-06 22:43:04,485 INFO L125 PetriNetUnfolderBase]: For 3953/3953 co-relation queries the response was YES. [2023-11-06 22:43:04,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7187 conditions, 2012 events. 1374/2012 cut-off events. For 3953/3953 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 8146 event pairs, 639 based on Foata normal form. 134/2072 useless extension candidates. Maximal degree in co-relation 7145. Up to 1438 conditions per place. [2023-11-06 22:43:04,499 INFO L140 encePairwiseOnDemand]: 389/394 looper letters, 61 selfloop transitions, 8 changer transitions 0/78 dead transitions. [2023-11-06 22:43:04,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 78 transitions, 525 flow [2023-11-06 22:43:04,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:43:04,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:43:04,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1073 transitions. [2023-11-06 22:43:04,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4538917089678511 [2023-11-06 22:43:04,505 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1073 transitions. [2023-11-06 22:43:04,505 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1073 transitions. [2023-11-06 22:43:04,506 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:43:04,506 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1073 transitions. [2023-11-06 22:43:04,509 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 178.83333333333334) internal successors, (1073), 6 states have internal predecessors, (1073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:04,515 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 394.0) internal successors, (2758), 7 states have internal predecessors, (2758), 0 states have call successors, (0), 0 states 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 22:43:04,516 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 394.0) internal successors, (2758), 7 states have internal predecessors, (2758), 0 states have call successors, (0), 0 states 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 22:43:04,516 INFO L175 Difference]: Start difference. First operand has 73 places, 56 transitions, 292 flow. Second operand 6 states and 1073 transitions. [2023-11-06 22:43:04,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 78 transitions, 525 flow [2023-11-06 22:43:04,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 78 transitions, 465 flow, removed 18 selfloop flow, removed 9 redundant places. [2023-11-06 22:43:04,542 INFO L231 Difference]: Finished difference. Result has 66 places, 56 transitions, 267 flow [2023-11-06 22:43:04,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=394, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=267, PETRI_PLACES=66, PETRI_TRANSITIONS=56} [2023-11-06 22:43:04,545 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 20 predicate places. [2023-11-06 22:43:04,545 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 56 transitions, 267 flow [2023-11-06 22:43:04,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 174.33333333333334) internal successors, (1046), 6 states have internal predecessors, (1046), 0 states have call successors, (0), 0 states 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 22:43:04,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:43:04,546 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:43:04,552 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100260ed-47f9-483d-a964-817eb02b450b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:43:04,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100260ed-47f9-483d-a964-817eb02b450b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-06 22:43:04,752 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err4INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-06 22:43:04,752 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:43:04,753 INFO L85 PathProgramCache]: Analyzing trace with hash -719171147, now seen corresponding path program 1 times [2023-11-06 22:43:04,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:43:04,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841923390] [2023-11-06 22:43:04,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:43:04,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:43:04,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:43:06,501 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 22:43:06,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:43:06,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841923390] [2023-11-06 22:43:06,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841923390] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:43:06,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445567408] [2023-11-06 22:43:06,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:43:06,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:43:06,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100260ed-47f9-483d-a964-817eb02b450b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:43:06,513 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100260ed-47f9-483d-a964-817eb02b450b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:43:06,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100260ed-47f9-483d-a964-817eb02b450b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:43:06,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:43:06,680 INFO L262 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-06 22:43:06,683 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:43:06,870 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2023-11-06 22:43:06,894 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 22:43:06,894 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:43:06,990 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:43:06,991 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 14 [2023-11-06 22:43:07,034 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 22:43:07,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445567408] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:43:07,035 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:43:07,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 6] total 20 [2023-11-06 22:43:07,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499667955] [2023-11-06 22:43:07,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:43:07,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-06 22:43:07,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:43:07,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-06 22:43:07,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2023-11-06 22:43:08,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 394 [2023-11-06 22:43:08,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 56 transitions, 267 flow. Second operand has 21 states, 21 states have (on average 152.61904761904762) internal successors, (3205), 21 states have internal predecessors, (3205), 0 states have call successors, (0), 0 states 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 22:43:08,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:43:08,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 394 [2023-11-06 22:43:08,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:43:10,205 INFO L124 PetriNetUnfolderBase]: 3683/5353 cut-off events. [2023-11-06 22:43:10,206 INFO L125 PetriNetUnfolderBase]: For 8653/8657 co-relation queries the response was YES. [2023-11-06 22:43:10,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17947 conditions, 5353 events. 3683/5353 cut-off events. For 8653/8657 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 25336 event pairs, 699 based on Foata normal form. 2/5212 useless extension candidates. Maximal degree in co-relation 17910. Up to 2423 conditions per place. [2023-11-06 22:43:10,248 INFO L140 encePairwiseOnDemand]: 382/394 looper letters, 194 selfloop transitions, 59 changer transitions 2/261 dead transitions. [2023-11-06 22:43:10,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 261 transitions, 1650 flow [2023-11-06 22:43:10,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-06 22:43:10,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-06 22:43:10,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3075 transitions. [2023-11-06 22:43:10,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107667646273043 [2023-11-06 22:43:10,262 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3075 transitions. [2023-11-06 22:43:10,262 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3075 transitions. [2023-11-06 22:43:10,264 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:43:10,265 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3075 transitions. [2023-11-06 22:43:10,274 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 161.8421052631579) internal successors, (3075), 19 states have internal predecessors, (3075), 0 states have call successors, (0), 0 states 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 22:43:10,299 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 394.0) internal successors, (7880), 20 states have internal predecessors, (7880), 0 states have call successors, (0), 0 states 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 22:43:10,303 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 394.0) internal successors, (7880), 20 states have internal predecessors, (7880), 0 states have call successors, (0), 0 states 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 22:43:10,303 INFO L175 Difference]: Start difference. First operand has 66 places, 56 transitions, 267 flow. Second operand 19 states and 3075 transitions. [2023-11-06 22:43:10,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 261 transitions, 1650 flow [2023-11-06 22:43:10,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 261 transitions, 1584 flow, removed 9 selfloop flow, removed 5 redundant places. [2023-11-06 22:43:10,333 INFO L231 Difference]: Finished difference. Result has 88 places, 109 transitions, 770 flow [2023-11-06 22:43:10,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=394, PETRI_DIFFERENCE_MINUEND_FLOW=249, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=770, PETRI_PLACES=88, PETRI_TRANSITIONS=109} [2023-11-06 22:43:10,335 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 42 predicate places. [2023-11-06 22:43:10,335 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 109 transitions, 770 flow [2023-11-06 22:43:10,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 152.61904761904762) internal successors, (3205), 21 states have internal predecessors, (3205), 0 states have call successors, (0), 0 states 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 22:43:10,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:43:10,337 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:43:10,344 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100260ed-47f9-483d-a964-817eb02b450b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:43:10,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100260ed-47f9-483d-a964-817eb02b450b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:43:10,544 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err4INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-06 22:43:10,545 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:43:10,545 INFO L85 PathProgramCache]: Analyzing trace with hash -390246221, now seen corresponding path program 2 times [2023-11-06 22:43:10,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:43:10,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696650975] [2023-11-06 22:43:10,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:43:10,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:43:10,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:43:12,101 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 22:43:12,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:43:12,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696650975] [2023-11-06 22:43:12,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696650975] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:43:12,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62394306] [2023-11-06 22:43:12,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:43:12,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:43:12,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100260ed-47f9-483d-a964-817eb02b450b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:43:12,103 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100260ed-47f9-483d-a964-817eb02b450b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:43:12,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100260ed-47f9-483d-a964-817eb02b450b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:43:12,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:43:12,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:43:12,280 INFO L262 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 52 conjunts are in the unsatisfiable core [2023-11-06 22:43:12,285 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:43:12,306 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-11-06 22:43:12,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:43:12,317 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:43:12,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:43:12,327 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:43:12,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:43:12,333 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:43:12,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:43:12,344 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:43:12,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:43:12,352 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:43:12,687 INFO L322 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-11-06 22:43:12,687 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 20 treesize of output 22 [2023-11-06 22:43:12,785 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-06 22:43:12,892 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-06 22:43:12,972 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:43:12,972 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2023-11-06 22:43:13,082 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 22:43:13,083 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:43:17,352 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:43:17,353 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 112 treesize of output 78 [2023-11-06 22:43:17,362 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 56 [2023-11-06 22:43:17,384 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 30 treesize of output 24 [2023-11-06 22:43:18,613 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:43:18,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62394306] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:43:18,613 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:43:18,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 34 [2023-11-06 22:43:18,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240699163] [2023-11-06 22:43:18,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:43:18,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-11-06 22:43:18,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:43:18,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-11-06 22:43:18,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1131, Unknown=10, NotChecked=0, Total=1260 [2023-11-06 22:43:21,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 394 [2023-11-06 22:43:21,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 109 transitions, 770 flow. Second operand has 36 states, 36 states have (on average 121.08333333333333) internal successors, (4359), 36 states have internal predecessors, (4359), 0 states have call successors, (0), 0 states 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 22:43:21,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:43:21,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 394 [2023-11-06 22:43:21,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:43:26,918 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:43:44,328 INFO L124 PetriNetUnfolderBase]: 13365/19012 cut-off events. [2023-11-06 22:43:44,328 INFO L125 PetriNetUnfolderBase]: For 55557/55566 co-relation queries the response was YES. [2023-11-06 22:43:44,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75783 conditions, 19012 events. 13365/19012 cut-off events. For 55557/55566 co-relation queries the response was YES. Maximal size of possible extension queue 732. Compared 107404 event pairs, 1285 based on Foata normal form. 15/18539 useless extension candidates. Maximal degree in co-relation 75736. Up to 3436 conditions per place. [2023-11-06 22:43:44,479 INFO L140 encePairwiseOnDemand]: 376/394 looper letters, 600 selfloop transitions, 261 changer transitions 21/887 dead transitions. [2023-11-06 22:43:44,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 887 transitions, 6698 flow [2023-11-06 22:43:44,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-11-06 22:43:44,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2023-11-06 22:43:44,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 8291 transitions. [2023-11-06 22:43:44,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32879917512690354 [2023-11-06 22:43:44,512 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 8291 transitions. [2023-11-06 22:43:44,512 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 8291 transitions. [2023-11-06 22:43:44,518 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:43:44,518 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 8291 transitions. [2023-11-06 22:43:44,538 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 129.546875) internal successors, (8291), 64 states have internal predecessors, (8291), 0 states have call successors, (0), 0 states 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 22:43:44,584 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 394.0) internal successors, (25610), 65 states have internal predecessors, (25610), 0 states have call successors, (0), 0 states 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 22:43:44,592 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 394.0) internal successors, (25610), 65 states have internal predecessors, (25610), 0 states have call successors, (0), 0 states 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 22:43:44,592 INFO L175 Difference]: Start difference. First operand has 88 places, 109 transitions, 770 flow. Second operand 64 states and 8291 transitions. [2023-11-06 22:43:44,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 887 transitions, 6698 flow [2023-11-06 22:43:44,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 887 transitions, 6588 flow, removed 30 selfloop flow, removed 5 redundant places. [2023-11-06 22:43:44,935 INFO L231 Difference]: Finished difference. Result has 180 places, 372 transitions, 3754 flow [2023-11-06 22:43:44,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=394, PETRI_DIFFERENCE_MINUEND_FLOW=733, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=3754, PETRI_PLACES=180, PETRI_TRANSITIONS=372} [2023-11-06 22:43:44,936 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 134 predicate places. [2023-11-06 22:43:44,936 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 372 transitions, 3754 flow [2023-11-06 22:43:44,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 121.08333333333333) internal successors, (4359), 36 states have internal predecessors, (4359), 0 states have call successors, (0), 0 states 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 22:43:44,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:43:44,938 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:43:44,953 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100260ed-47f9-483d-a964-817eb02b450b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 22:43:45,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100260ed-47f9-483d-a964-817eb02b450b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:43:45,145 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err4INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-06 22:43:45,145 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:43:45,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1230416423, now seen corresponding path program 3 times [2023-11-06 22:43:45,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:43:45,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968165642] [2023-11-06 22:43:45,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:43:45,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:43:45,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:43:46,867 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 22:43:46,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:43:46,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968165642] [2023-11-06 22:43:46,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968165642] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:43:46,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350760027] [2023-11-06 22:43:46,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:43:46,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:43:46,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100260ed-47f9-483d-a964-817eb02b450b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:43:46,869 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100260ed-47f9-483d-a964-817eb02b450b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:43:46,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100260ed-47f9-483d-a964-817eb02b450b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 22:43:47,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 22:43:47,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:43:47,073 INFO L262 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 42 conjunts are in the unsatisfiable core [2023-11-06 22:43:47,077 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:43:47,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:43:47,601 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-06 22:43:47,797 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:43:47,797 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2023-11-06 22:43:47,858 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 22:43:47,858 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:43:48,511 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:43:48,511 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 36 [2023-11-06 22:43:48,519 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 15 treesize of output 9 [2023-11-06 22:43:49,082 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:43:49,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350760027] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:43:49,083 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:43:49,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 33 [2023-11-06 22:43:49,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370185977] [2023-11-06 22:43:49,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:43:49,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-06 22:43:49,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:43:49,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-06 22:43:49,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1083, Unknown=3, NotChecked=0, Total=1190 [2023-11-06 22:43:51,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 394 [2023-11-06 22:43:51,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 372 transitions, 3754 flow. Second operand has 35 states, 35 states have (on average 126.37142857142857) internal successors, (4423), 35 states have internal predecessors, (4423), 0 states have call successors, (0), 0 states 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 22:43:51,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:43:51,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 394 [2023-11-06 22:43:51,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:43:56,470 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:44:00,045 WARN L539 Checker$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 22:44:05,228 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:44:10,627 WARN L539 Checker$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 22:44:15,861 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 22:44:24,076 INFO L124 PetriNetUnfolderBase]: 30797/44069 cut-off events. [2023-11-06 22:44:24,077 INFO L125 PetriNetUnfolderBase]: For 709082/709142 co-relation queries the response was YES. [2023-11-06 22:44:24,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 293096 conditions, 44069 events. 30797/44069 cut-off events. For 709082/709142 co-relation queries the response was YES. Maximal size of possible extension queue 1604. Compared 281191 event pairs, 3096 based on Foata normal form. 122/42830 useless extension candidates. Maximal degree in co-relation 293014. Up to 11838 conditions per place. [2023-11-06 22:44:24,717 INFO L140 encePairwiseOnDemand]: 377/394 looper letters, 870 selfloop transitions, 450 changer transitions 46/1371 dead transitions. [2023-11-06 22:44:24,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 1371 transitions, 16202 flow [2023-11-06 22:44:24,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-11-06 22:44:24,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2023-11-06 22:44:24,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 8078 transitions. [2023-11-06 22:44:24,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3475006452723049 [2023-11-06 22:44:24,744 INFO L72 ComplementDD]: Start complementDD. Operand 59 states and 8078 transitions. [2023-11-06 22:44:24,744 INFO L73 IsDeterministic]: Start isDeterministic. Operand 59 states and 8078 transitions. [2023-11-06 22:44:24,750 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:44:24,750 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 59 states and 8078 transitions. [2023-11-06 22:44:24,767 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 60 states, 59 states have (on average 136.91525423728814) internal successors, (8078), 59 states have internal predecessors, (8078), 0 states have call successors, (0), 0 states 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 22:44:24,797 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 60 states, 60 states have (on average 394.0) internal successors, (23640), 60 states have internal predecessors, (23640), 0 states have call successors, (0), 0 states 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 22:44:24,801 INFO L81 ComplementDD]: Finished complementDD. Result has 60 states, 60 states have (on average 394.0) internal successors, (23640), 60 states have internal predecessors, (23640), 0 states have call successors, (0), 0 states 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 22:44:24,802 INFO L175 Difference]: Start difference. First operand has 180 places, 372 transitions, 3754 flow. Second operand 59 states and 8078 transitions. [2023-11-06 22:44:24,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 1371 transitions, 16202 flow [2023-11-06 22:44:29,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 1371 transitions, 14695 flow, removed 662 selfloop flow, removed 6 redundant places. [2023-11-06 22:44:29,360 INFO L231 Difference]: Finished difference. Result has 261 places, 699 transitions, 8554 flow [2023-11-06 22:44:29,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=394, PETRI_DIFFERENCE_MINUEND_FLOW=3063, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=59, PETRI_FLOW=8554, PETRI_PLACES=261, PETRI_TRANSITIONS=699} [2023-11-06 22:44:29,361 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 215 predicate places. [2023-11-06 22:44:29,361 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 699 transitions, 8554 flow [2023-11-06 22:44:29,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 126.37142857142857) internal successors, (4423), 35 states have internal predecessors, (4423), 0 states have call successors, (0), 0 states 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 22:44:29,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:44:29,363 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:44:29,370 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100260ed-47f9-483d-a964-817eb02b450b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-06 22:44:29,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100260ed-47f9-483d-a964-817eb02b450b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:44:29,570 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err4INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-06 22:44:29,570 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:44:29,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1878446210, now seen corresponding path program 1 times [2023-11-06 22:44:29,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:44:29,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309547639] [2023-11-06 22:44:29,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:44:29,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:44:29,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:44:30,965 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 22:44:30,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:44:30,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309547639] [2023-11-06 22:44:30,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309547639] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:44:30,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241578977] [2023-11-06 22:44:30,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:44:30,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:44:30,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100260ed-47f9-483d-a964-817eb02b450b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:44:30,981 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100260ed-47f9-483d-a964-817eb02b450b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:44:31,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100260ed-47f9-483d-a964-817eb02b450b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 22:44:31,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:44:31,154 INFO L262 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-06 22:44:31,161 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:44:31,406 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2023-11-06 22:44:31,433 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 22:44:31,433 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:44:31,553 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:44:31,553 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 14 [2023-11-06 22:44:31,593 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 22:44:31,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241578977] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:44:31,593 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:44:31,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 6] total 20 [2023-11-06 22:44:31,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363763077] [2023-11-06 22:44:31,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:44:31,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-06 22:44:31,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:44:31,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-06 22:44:31,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2023-11-06 22:44:33,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 394 [2023-11-06 22:44:33,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 699 transitions, 8554 flow. Second operand has 21 states, 21 states have (on average 152.85714285714286) internal successors, (3210), 21 states have internal predecessors, (3210), 0 states have call successors, (0), 0 states 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 22:44:33,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:44:33,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 394 [2023-11-06 22:44:33,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:44:50,471 INFO L124 PetriNetUnfolderBase]: 31089/45338 cut-off events. [2023-11-06 22:44:50,471 INFO L125 PetriNetUnfolderBase]: For 1419890/1420034 co-relation queries the response was YES. [2023-11-06 22:44:50,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 354597 conditions, 45338 events. 31089/45338 cut-off events. For 1419890/1420034 co-relation queries the response was YES. Maximal size of possible extension queue 1752. Compared 302554 event pairs, 11735 based on Foata normal form. 66/43906 useless extension candidates. Maximal degree in co-relation 354486. Up to 38350 conditions per place. [2023-11-06 22:44:51,181 INFO L140 encePairwiseOnDemand]: 383/394 looper letters, 792 selfloop transitions, 101 changer transitions 1/900 dead transitions. [2023-11-06 22:44:51,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 900 transitions, 12876 flow [2023-11-06 22:44:51,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-06 22:44:51,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-06 22:44:51,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3045 transitions. [2023-11-06 22:44:51,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.406759283996794 [2023-11-06 22:44:51,189 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3045 transitions. [2023-11-06 22:44:51,189 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3045 transitions. [2023-11-06 22:44:51,191 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:44:51,191 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3045 transitions. [2023-11-06 22:44:51,196 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 160.26315789473685) internal successors, (3045), 19 states have internal predecessors, (3045), 0 states have call successors, (0), 0 states 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 22:44:51,204 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 394.0) internal successors, (7880), 20 states have internal predecessors, (7880), 0 states have call successors, (0), 0 states 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 22:44:51,205 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 394.0) internal successors, (7880), 20 states have internal predecessors, (7880), 0 states have call successors, (0), 0 states 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 22:44:51,205 INFO L175 Difference]: Start difference. First operand has 261 places, 699 transitions, 8554 flow. Second operand 19 states and 3045 transitions. [2023-11-06 22:44:51,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 900 transitions, 12876 flow [2023-11-06 22:45:12,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 900 transitions, 11490 flow, removed 666 selfloop flow, removed 7 redundant places. [2023-11-06 22:45:12,445 INFO L231 Difference]: Finished difference. Result has 278 places, 729 transitions, 8125 flow [2023-11-06 22:45:12,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=394, PETRI_DIFFERENCE_MINUEND_FLOW=7238, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=699, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=615, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=8125, PETRI_PLACES=278, PETRI_TRANSITIONS=729} [2023-11-06 22:45:12,446 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 232 predicate places. [2023-11-06 22:45:12,447 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 729 transitions, 8125 flow [2023-11-06 22:45:12,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 152.85714285714286) internal successors, (3210), 21 states have internal predecessors, (3210), 0 states have call successors, (0), 0 states 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 22:45:12,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:45:12,448 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:45:12,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100260ed-47f9-483d-a964-817eb02b450b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 22:45:12,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100260ed-47f9-483d-a964-817eb02b450b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:45:12,655 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err4INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-06 22:45:12,655 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:45:12,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1750131721, now seen corresponding path program 4 times [2023-11-06 22:45:12,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:45:12,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207735818] [2023-11-06 22:45:12,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:45:12,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:45:12,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:45:14,319 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 22:45:14,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:45:14,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207735818] [2023-11-06 22:45:14,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207735818] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:45:14,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168686875] [2023-11-06 22:45:14,320 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:45:14,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:45:14,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100260ed-47f9-483d-a964-817eb02b450b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:45:14,322 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100260ed-47f9-483d-a964-817eb02b450b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:45:14,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100260ed-47f9-483d-a964-817eb02b450b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 22:45:14,522 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:45:14,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:45:14,525 INFO L262 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-06 22:45:14,528 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:45:14,533 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 39 treesize of output 37 [2023-11-06 22:45:14,759 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 18 treesize of output 13 [2023-11-06 22:45:14,867 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2023-11-06 22:45:14,899 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 22:45:14,899 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:45:15,138 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:45:15,138 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 32 [2023-11-06 22:45:15,145 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 13 treesize of output 9 [2023-11-06 22:45:15,267 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 22:45:15,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168686875] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:45:15,267 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:45:15,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 8] total 23 [2023-11-06 22:45:15,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471248294] [2023-11-06 22:45:15,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:45:15,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 22:45:15,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:45:15,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 22:45:15,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=507, Unknown=1, NotChecked=0, Total=600 [2023-11-06 22:45:16,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 394 [2023-11-06 22:45:16,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 729 transitions, 8125 flow. Second operand has 25 states, 25 states have (on average 133.4) internal successors, (3335), 25 states have internal predecessors, (3335), 0 states have call successors, (0), 0 states 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 22:45:16,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:45:16,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 394 [2023-11-06 22:45:16,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:45:35,611 INFO L124 PetriNetUnfolderBase]: 34238/49016 cut-off events. [2023-11-06 22:45:35,611 INFO L125 PetriNetUnfolderBase]: For 1497047/1497079 co-relation queries the response was YES. [2023-11-06 22:45:36,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 367645 conditions, 49016 events. 34238/49016 cut-off events. For 1497047/1497079 co-relation queries the response was YES. Maximal size of possible extension queue 1821. Compared 319126 event pairs, 13812 based on Foata normal form. 26/47519 useless extension candidates. Maximal degree in co-relation 367527. Up to 44275 conditions per place. [2023-11-06 22:45:36,871 INFO L140 encePairwiseOnDemand]: 382/394 looper letters, 729 selfloop transitions, 137 changer transitions 1/872 dead transitions. [2023-11-06 22:45:36,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 872 transitions, 11457 flow [2023-11-06 22:45:36,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-06 22:45:36,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-06 22:45:36,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2517 transitions. [2023-11-06 22:45:36,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35490693739424706 [2023-11-06 22:45:36,878 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2517 transitions. [2023-11-06 22:45:36,878 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2517 transitions. [2023-11-06 22:45:36,880 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:45:36,880 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2517 transitions. [2023-11-06 22:45:36,885 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 139.83333333333334) internal successors, (2517), 18 states have internal predecessors, (2517), 0 states have call successors, (0), 0 states 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 22:45:36,894 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 394.0) internal successors, (7486), 19 states have internal predecessors, (7486), 0 states have call successors, (0), 0 states 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 22:45:36,896 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 394.0) internal successors, (7486), 19 states have internal predecessors, (7486), 0 states have call successors, (0), 0 states 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 22:45:36,896 INFO L175 Difference]: Start difference. First operand has 278 places, 729 transitions, 8125 flow. Second operand 18 states and 2517 transitions. [2023-11-06 22:45:36,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 872 transitions, 11457 flow [2023-11-06 22:45:57,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 872 transitions, 10910 flow, removed 118 selfloop flow, removed 10 redundant places. [2023-11-06 22:45:57,846 INFO L231 Difference]: Finished difference. Result has 289 places, 755 transitions, 8368 flow [2023-11-06 22:45:57,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=394, PETRI_DIFFERENCE_MINUEND_FLOW=7605, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=729, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=602, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=8368, PETRI_PLACES=289, PETRI_TRANSITIONS=755} [2023-11-06 22:45:57,847 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 243 predicate places. [2023-11-06 22:45:57,848 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 755 transitions, 8368 flow [2023-11-06 22:45:57,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 133.4) internal successors, (3335), 25 states have internal predecessors, (3335), 0 states have call successors, (0), 0 states 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 22:45:57,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:45:57,849 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:45:57,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100260ed-47f9-483d-a964-817eb02b450b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 22:45:58,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100260ed-47f9-483d-a964-817eb02b450b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-06 22:45:58,050 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err4INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-06 22:45:58,050 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:45:58,050 INFO L85 PathProgramCache]: Analyzing trace with hash -668323647, now seen corresponding path program 5 times [2023-11-06 22:45:58,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:45:58,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335584950] [2023-11-06 22:45:58,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:45:58,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:45:58,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:45:59,452 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 22:45:59,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:45:59,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335584950] [2023-11-06 22:45:59,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335584950] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:45:59,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898345685] [2023-11-06 22:45:59,453 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:45:59,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:45:59,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100260ed-47f9-483d-a964-817eb02b450b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:45:59,455 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100260ed-47f9-483d-a964-817eb02b450b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:45:59,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100260ed-47f9-483d-a964-817eb02b450b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 22:45:59,664 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-06 22:45:59,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:45:59,667 INFO L262 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-06 22:45:59,670 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:46:00,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:46:00,004 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-06 22:46:00,160 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-06 22:46:00,199 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 22:46:00,199 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:46:00,480 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:46:00,481 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 32 [2023-11-06 22:46:00,487 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 13 treesize of output 9 [2023-11-06 22:46:00,689 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 22:46:00,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898345685] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:46:00,689 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:46:00,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 8] total 25 [2023-11-06 22:46:00,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632156781] [2023-11-06 22:46:00,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:46:00,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-06 22:46:00,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:46:00,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-06 22:46:00,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=605, Unknown=5, NotChecked=0, Total=702 [2023-11-06 22:46:02,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 394 [2023-11-06 22:46:02,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 755 transitions, 8368 flow. Second operand has 27 states, 27 states have (on average 133.55555555555554) internal successors, (3606), 27 states have internal predecessors, (3606), 0 states have call successors, (0), 0 states 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 22:46:02,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:46:02,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 394 [2023-11-06 22:46:02,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand