./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/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_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/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_0d28788c-1048-429c-817e-e340baf41e40/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 9abac63211b9980a3b9079d9eb140a85fbc6c5adec6517ed998cc9e140b19342 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 23:02:46,272 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 23:02:46,398 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 23:02:46,403 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 23:02:46,404 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 23:02:46,458 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 23:02:46,460 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 23:02:46,461 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 23:02:46,462 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 23:02:46,467 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 23:02:46,468 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 23:02:46,469 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 23:02:46,469 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 23:02:46,471 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 23:02:46,471 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 23:02:46,472 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 23:02:46,472 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 23:02:46,473 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 23:02:46,473 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 23:02:46,474 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 23:02:46,474 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 23:02:46,484 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 23:02:46,485 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 23:02:46,485 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 23:02:46,485 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 23:02:46,486 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 23:02:46,486 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 23:02:46,487 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 23:02:46,487 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:02:46,488 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 23:02:46,489 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 23:02:46,489 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 23:02:46,490 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 23:02:46,490 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 23:02:46,490 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 23:02:46,490 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 23:02:46,490 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 23:02:46,491 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 23:02:46,491 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 23:02:46,491 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_0d28788c-1048-429c-817e-e340baf41e40/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9abac63211b9980a3b9079d9eb140a85fbc6c5adec6517ed998cc9e140b19342 [2023-11-06 23:02:46,857 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 23:02:46,888 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 23:02:46,892 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 23:02:46,893 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 23:02:46,894 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 23:02:46,895 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c [2023-11-06 23:02:49,833 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 23:02:50,142 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 23:02:50,143 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c [2023-11-06 23:02:50,152 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/data/8be21a9d0/2a3cfdecf8524c17b2a25552eebf3a09/FLAGae2b5de2b [2023-11-06 23:02:50,172 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/data/8be21a9d0/2a3cfdecf8524c17b2a25552eebf3a09 [2023-11-06 23:02:50,179 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 23:02:50,181 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 23:02:50,185 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 23:02:50,186 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 23:02:50,193 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 23:02:50,194 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:02:50" (1/1) ... [2023-11-06 23:02:50,196 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f630822 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:02:50, skipping insertion in model container [2023-11-06 23:02:50,196 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:02:50" (1/1) ... [2023-11-06 23:02:50,229 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 23:02:50,433 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_0d28788c-1048-429c-817e-e340baf41e40/sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c[2553,2566] [2023-11-06 23:02:50,444 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:02:50,454 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 23:02:50,481 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_0d28788c-1048-429c-817e-e340baf41e40/sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c[2553,2566] [2023-11-06 23:02:50,485 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:02:50,494 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 23:02:50,494 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 23:02:50,502 INFO L206 MainTranslator]: Completed translation [2023-11-06 23:02:50,503 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:02:50 WrapperNode [2023-11-06 23:02:50,503 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 23:02:50,505 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 23:02:50,505 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 23:02:50,505 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 23:02:50,513 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:02:50" (1/1) ... [2023-11-06 23:02:50,536 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:02:50" (1/1) ... [2023-11-06 23:02:50,560 INFO L138 Inliner]: procedures = 24, calls = 43, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 104 [2023-11-06 23:02:50,561 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 23:02:50,562 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 23:02:50,562 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 23:02:50,562 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 23:02:50,570 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:02:50" (1/1) ... [2023-11-06 23:02:50,571 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:02:50" (1/1) ... [2023-11-06 23:02:50,590 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:02:50" (1/1) ... [2023-11-06 23:02:50,590 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:02:50" (1/1) ... [2023-11-06 23:02:50,599 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:02:50" (1/1) ... [2023-11-06 23:02:50,604 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:02:50" (1/1) ... [2023-11-06 23:02:50,606 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:02:50" (1/1) ... [2023-11-06 23:02:50,608 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:02:50" (1/1) ... [2023-11-06 23:02:50,612 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 23:02:50,613 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 23:02:50,613 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 23:02:50,613 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 23:02:50,614 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:02:50" (1/1) ... [2023-11-06 23:02:50,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:02:50,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:02:50,669 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 23:02:50,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 23:02:50,718 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 23:02:50,719 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-06 23:02:50,719 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-06 23:02:50,720 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-06 23:02:50,720 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-06 23:02:50,720 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-06 23:02:50,721 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-06 23:02:50,721 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 23:02:50,721 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 23:02:50,721 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 23:02:50,722 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-06 23:02:50,724 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-06 23:02:50,725 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 23:02:50,725 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 23:02:50,725 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 23:02:50,725 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 23:02:50,726 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 23:02:50,727 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-06 23:02:50,904 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 23:02:50,906 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 23:02:51,220 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 23:02:51,287 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 23:02:51,287 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-06 23:02:51,290 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:02:51 BoogieIcfgContainer [2023-11-06 23:02:51,290 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 23:02:51,293 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 23:02:51,293 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 23:02:51,297 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 23:02:51,297 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 11:02:50" (1/3) ... [2023-11-06 23:02:51,298 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@203b135d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:02:51, skipping insertion in model container [2023-11-06 23:02:51,298 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:02:50" (2/3) ... [2023-11-06 23:02:51,298 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@203b135d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:02:51, skipping insertion in model container [2023-11-06 23:02:51,299 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:02:51" (3/3) ... [2023-11-06 23:02:51,304 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-min-array.wvr.c [2023-11-06 23:02:51,315 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-06 23:02:51,326 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 23:02:51,327 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 23:02:51,327 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 23:02:51,448 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-06 23:02:51,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 154 places, 156 transitions, 333 flow [2023-11-06 23:02:51,590 INFO L124 PetriNetUnfolderBase]: 12/153 cut-off events. [2023-11-06 23:02:51,590 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 23:02:51,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 166 conditions, 153 events. 12/153 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 101 event pairs, 0 based on Foata normal form. 0/140 useless extension candidates. Maximal degree in co-relation 114. Up to 2 conditions per place. [2023-11-06 23:02:51,597 INFO L82 GeneralOperation]: Start removeDead. Operand has 154 places, 156 transitions, 333 flow [2023-11-06 23:02:51,604 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 140 places, 142 transitions, 302 flow [2023-11-06 23:02:51,608 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 23:02:51,618 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 140 places, 142 transitions, 302 flow [2023-11-06 23:02:51,621 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 140 places, 142 transitions, 302 flow [2023-11-06 23:02:51,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 140 places, 142 transitions, 302 flow [2023-11-06 23:02:51,683 INFO L124 PetriNetUnfolderBase]: 12/142 cut-off events. [2023-11-06 23:02:51,683 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 23:02:51,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155 conditions, 142 events. 12/142 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 100 event pairs, 0 based on Foata normal form. 0/130 useless extension candidates. Maximal degree in co-relation 114. Up to 2 conditions per place. [2023-11-06 23:02:51,687 INFO L119 LiptonReduction]: Number of co-enabled transitions 1518 [2023-11-06 23:02:57,778 INFO L134 LiptonReduction]: Checked pairs total: 1673 [2023-11-06 23:02:57,779 INFO L136 LiptonReduction]: Total number of compositions: 141 [2023-11-06 23:02:57,796 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 23:02:57,805 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;@516b6214, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 23:02:57,806 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-06 23:02:57,815 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 23:02:57,820 INFO L124 PetriNetUnfolderBase]: 4/23 cut-off events. [2023-11-06 23:02:57,821 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 23:02:57,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:02:57,822 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:02:57,823 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 23:02:57,830 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:02:57,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1337388086, now seen corresponding path program 1 times [2023-11-06 23:02:57,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:02:57,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65265127] [2023-11-06 23:02:57,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:02:57,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:02:58,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:02:58,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:02:58,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:02:58,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65265127] [2023-11-06 23:02:58,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65265127] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:02:58,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:02:58,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 23:02:58,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561440989] [2023-11-06 23:02:58,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:02:58,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:02:58,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:02:58,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:02:58,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:02:58,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 297 [2023-11-06 23:02:58,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 24 transitions, 66 flow. Second operand has 3 states, 3 states have (on average 141.66666666666666) internal successors, (425), 3 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:58,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:02:58,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 297 [2023-11-06 23:02:58,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:02:58,575 INFO L124 PetriNetUnfolderBase]: 360/508 cut-off events. [2023-11-06 23:02:58,576 INFO L125 PetriNetUnfolderBase]: For 42/42 co-relation queries the response was YES. [2023-11-06 23:02:58,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1068 conditions, 508 events. 360/508 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1607 event pairs, 39 based on Foata normal form. 1/307 useless extension candidates. Maximal degree in co-relation 803. Up to 421 conditions per place. [2023-11-06 23:02:58,599 INFO L140 encePairwiseOnDemand]: 292/297 looper letters, 32 selfloop transitions, 4 changer transitions 1/40 dead transitions. [2023-11-06 23:02:58,599 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 40 transitions, 187 flow [2023-11-06 23:02:58,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:02:58,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:02:58,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 446 transitions. [2023-11-06 23:02:58,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.500561167227834 [2023-11-06 23:02:58,628 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 446 transitions. [2023-11-06 23:02:58,629 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 446 transitions. [2023-11-06 23:02:58,631 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:02:58,633 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 446 transitions. [2023-11-06 23:02:58,638 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 148.66666666666666) internal successors, (446), 3 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:58,644 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 297.0) internal successors, (1188), 4 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:58,645 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 297.0) internal successors, (1188), 4 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:58,647 INFO L175 Difference]: Start difference. First operand has 30 places, 24 transitions, 66 flow. Second operand 3 states and 446 transitions. [2023-11-06 23:02:58,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 40 transitions, 187 flow [2023-11-06 23:02:58,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 40 transitions, 165 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-06 23:02:58,654 INFO L231 Difference]: Finished difference. Result has 27 places, 27 transitions, 80 flow [2023-11-06 23:02:58,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=27, PETRI_TRANSITIONS=27} [2023-11-06 23:02:58,660 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, -3 predicate places. [2023-11-06 23:02:58,660 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 27 transitions, 80 flow [2023-11-06 23:02:58,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 141.66666666666666) internal successors, (425), 3 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:58,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:02:58,661 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] [2023-11-06 23:02:58,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 23:02:58,662 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 23:02:58,665 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:02:58,665 INFO L85 PathProgramCache]: Analyzing trace with hash 612325594, now seen corresponding path program 1 times [2023-11-06 23:02:58,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:02:58,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051802089] [2023-11-06 23:02:58,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:02:58,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:02:58,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:02:58,927 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:02:58,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:02:58,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051802089] [2023-11-06 23:02:58,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051802089] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:02:58,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:02:58,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 23:02:58,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890821653] [2023-11-06 23:02:58,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:02:58,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:02:58,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:02:58,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:02:58,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:02:58,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 297 [2023-11-06 23:02:58,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 27 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 137.0) internal successors, (411), 3 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:58,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:02:58,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 297 [2023-11-06 23:02:58,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:02:59,107 INFO L124 PetriNetUnfolderBase]: 326/475 cut-off events. [2023-11-06 23:02:59,107 INFO L125 PetriNetUnfolderBase]: For 147/147 co-relation queries the response was YES. [2023-11-06 23:02:59,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1181 conditions, 475 events. 326/475 cut-off events. For 147/147 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1589 event pairs, 142 based on Foata normal form. 0/448 useless extension candidates. Maximal degree in co-relation 424. Up to 460 conditions per place. [2023-11-06 23:02:59,112 INFO L140 encePairwiseOnDemand]: 294/297 looper letters, 23 selfloop transitions, 2 changer transitions 0/28 dead transitions. [2023-11-06 23:02:59,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 28 transitions, 132 flow [2023-11-06 23:02:59,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:02:59,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:02:59,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 416 transitions. [2023-11-06 23:02:59,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4668911335578002 [2023-11-06 23:02:59,116 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 416 transitions. [2023-11-06 23:02:59,117 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 416 transitions. [2023-11-06 23:02:59,117 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:02:59,118 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 416 transitions. [2023-11-06 23:02:59,119 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 138.66666666666666) internal successors, (416), 3 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:59,123 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 297.0) internal successors, (1188), 4 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:59,124 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 297.0) internal successors, (1188), 4 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:59,125 INFO L175 Difference]: Start difference. First operand has 27 places, 27 transitions, 80 flow. Second operand 3 states and 416 transitions. [2023-11-06 23:02:59,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 28 transitions, 132 flow [2023-11-06 23:02:59,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 28 transitions, 128 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 23:02:59,127 INFO L231 Difference]: Finished difference. Result has 29 places, 28 transitions, 88 flow [2023-11-06 23:02:59,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=29, PETRI_TRANSITIONS=28} [2023-11-06 23:02:59,128 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, -1 predicate places. [2023-11-06 23:02:59,129 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 28 transitions, 88 flow [2023-11-06 23:02:59,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 137.0) internal successors, (411), 3 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:59,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:02:59,130 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:02:59,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 23:02:59,130 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 23:02:59,131 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:02:59,131 INFO L85 PathProgramCache]: Analyzing trace with hash 810421534, now seen corresponding path program 1 times [2023-11-06 23:02:59,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:02:59,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852477142] [2023-11-06 23:02:59,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:02:59,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:02:59,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:02:59,264 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 23:02:59,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:02:59,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852477142] [2023-11-06 23:02:59,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852477142] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:02:59,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:02:59,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 23:02:59,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074696096] [2023-11-06 23:02:59,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:02:59,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:02:59,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:02:59,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:02:59,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:02:59,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 297 [2023-11-06 23:02:59,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 28 transitions, 88 flow. Second operand has 4 states, 4 states have (on average 134.0) internal successors, (536), 4 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:59,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:02:59,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 297 [2023-11-06 23:02:59,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:02:59,478 INFO L124 PetriNetUnfolderBase]: 396/564 cut-off events. [2023-11-06 23:02:59,478 INFO L125 PetriNetUnfolderBase]: For 143/143 co-relation queries the response was YES. [2023-11-06 23:02:59,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1371 conditions, 564 events. 396/564 cut-off events. For 143/143 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1925 event pairs, 126 based on Foata normal form. 38/597 useless extension candidates. Maximal degree in co-relation 1358. Up to 425 conditions per place. [2023-11-06 23:02:59,484 INFO L140 encePairwiseOnDemand]: 293/297 looper letters, 34 selfloop transitions, 4 changer transitions 0/40 dead transitions. [2023-11-06 23:02:59,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 40 transitions, 200 flow [2023-11-06 23:02:59,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 23:02:59,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 23:02:59,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 549 transitions. [2023-11-06 23:02:59,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4621212121212121 [2023-11-06 23:02:59,488 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 549 transitions. [2023-11-06 23:02:59,488 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 549 transitions. [2023-11-06 23:02:59,489 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:02:59,489 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 549 transitions. [2023-11-06 23:02:59,491 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 137.25) internal successors, (549), 4 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:59,495 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 297.0) internal successors, (1485), 5 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:59,497 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 297.0) internal successors, (1485), 5 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:59,497 INFO L175 Difference]: Start difference. First operand has 29 places, 28 transitions, 88 flow. Second operand 4 states and 549 transitions. [2023-11-06 23:02:59,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 40 transitions, 200 flow [2023-11-06 23:02:59,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 40 transitions, 194 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-11-06 23:02:59,501 INFO L231 Difference]: Finished difference. Result has 32 places, 29 transitions, 101 flow [2023-11-06 23:02:59,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=101, PETRI_PLACES=32, PETRI_TRANSITIONS=29} [2023-11-06 23:02:59,504 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 2 predicate places. [2023-11-06 23:02:59,508 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 29 transitions, 101 flow [2023-11-06 23:02:59,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 134.0) internal successors, (536), 4 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:59,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:02:59,510 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:02:59,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 23:02:59,510 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 23:02:59,511 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:02:59,511 INFO L85 PathProgramCache]: Analyzing trace with hash -970585047, now seen corresponding path program 1 times [2023-11-06 23:02:59,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:02:59,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385686671] [2023-11-06 23:02:59,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:02:59,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:02:59,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:02:59,689 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:02:59,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:02:59,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385686671] [2023-11-06 23:02:59,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385686671] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:02:59,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813724625] [2023-11-06 23:02:59,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:02:59,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:02:59,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:02:59,695 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:02:59,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 23:02:59,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:02:59,829 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 23:02:59,834 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:02:59,937 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:02:59,937 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:02:59,985 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:02:59,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813724625] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 23:02:59,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:02:59,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-11-06 23:02:59,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464426966] [2023-11-06 23:02:59,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:02:59,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 23:02:59,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:02:59,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 23:02:59,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-06 23:03:00,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 297 [2023-11-06 23:03:00,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 29 transitions, 101 flow. Second operand has 5 states, 5 states have (on average 127.0) internal successors, (635), 5 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:00,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:03:00,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 297 [2023-11-06 23:03:00,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:03:00,224 INFO L124 PetriNetUnfolderBase]: 324/474 cut-off events. [2023-11-06 23:03:00,224 INFO L125 PetriNetUnfolderBase]: For 236/271 co-relation queries the response was YES. [2023-11-06 23:03:00,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1310 conditions, 474 events. 324/474 cut-off events. For 236/271 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1548 event pairs, 101 based on Foata normal form. 65/531 useless extension candidates. Maximal degree in co-relation 1291. Up to 361 conditions per place. [2023-11-06 23:03:00,229 INFO L140 encePairwiseOnDemand]: 292/297 looper letters, 35 selfloop transitions, 5 changer transitions 0/42 dead transitions. [2023-11-06 23:03:00,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 42 transitions, 231 flow [2023-11-06 23:03:00,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 23:03:00,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 23:03:00,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 649 transitions. [2023-11-06 23:03:00,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43703703703703706 [2023-11-06 23:03:00,233 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 649 transitions. [2023-11-06 23:03:00,234 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 649 transitions. [2023-11-06 23:03:00,234 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:03:00,235 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 649 transitions. [2023-11-06 23:03:00,237 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 129.8) internal successors, (649), 5 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:00,241 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 297.0) internal successors, (1782), 6 states have internal predecessors, (1782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:00,242 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 297.0) internal successors, (1782), 6 states have internal predecessors, (1782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:00,242 INFO L175 Difference]: Start difference. First operand has 32 places, 29 transitions, 101 flow. Second operand 5 states and 649 transitions. [2023-11-06 23:03:00,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 42 transitions, 231 flow [2023-11-06 23:03:00,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 42 transitions, 216 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-11-06 23:03:00,245 INFO L231 Difference]: Finished difference. Result has 35 places, 30 transitions, 113 flow [2023-11-06 23:03:00,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=113, PETRI_PLACES=35, PETRI_TRANSITIONS=30} [2023-11-06 23:03:00,246 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 5 predicate places. [2023-11-06 23:03:00,247 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 30 transitions, 113 flow [2023-11-06 23:03:00,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 127.0) internal successors, (635), 5 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:00,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:03:00,248 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] [2023-11-06 23:03:00,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 23:03:00,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:00,455 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 23:03:00,455 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:00,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1779849093, now seen corresponding path program 1 times [2023-11-06 23:03:00,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:00,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671568585] [2023-11-06 23:03:00,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:00,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:00,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:01,376 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:03:01,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:01,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671568585] [2023-11-06 23:03:01,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671568585] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:03:01,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492744785] [2023-11-06 23:03:01,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:01,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:01,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:03:01,381 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:03:01,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 23:03:01,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:01,513 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-06 23:03:01,517 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:03:01,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:03:01,959 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 38 treesize of output 29 [2023-11-06 23:03:02,099 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 59 treesize of output 35 [2023-11-06 23:03:02,210 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:03:02,211 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:03:02,402 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~A~0.offset (* 4 c_~M~0)))) (and (or (= c_~min2~0 c_~min1~0) (forall ((v_ArrVal_109 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_109) c_~A~0.base) .cse0) c_~min2~0))) (forall ((v_ArrVal_109 (Array Int Int))) (let ((.cse1 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_109) c_~A~0.base) .cse0))) (or (= c_~min1~0 .cse1) (< c_~min2~0 (+ .cse1 1))))))) is different from false [2023-11-06 23:03:02,467 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:03:02,468 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 145 treesize of output 105 [2023-11-06 23:03:02,478 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 73 treesize of output 61 [2023-11-06 23:03:02,487 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 61 treesize of output 55 [2023-11-06 23:03:02,938 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:03:02,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492744785] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:03:02,939 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:03:02,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2023-11-06 23:03:02,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206218516] [2023-11-06 23:03:02,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:03:02,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-06 23:03:02,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:02,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-06 23:03:02,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=375, Unknown=1, NotChecked=40, Total=506 [2023-11-06 23:03:02,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 297 [2023-11-06 23:03:02,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 30 transitions, 113 flow. Second operand has 23 states, 23 states have (on average 87.3913043478261) internal successors, (2010), 23 states have internal predecessors, (2010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:02,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:03:02,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 297 [2023-11-06 23:03:02,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:03:03,757 INFO L124 PetriNetUnfolderBase]: 643/936 cut-off events. [2023-11-06 23:03:03,757 INFO L125 PetriNetUnfolderBase]: For 549/549 co-relation queries the response was YES. [2023-11-06 23:03:03,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2701 conditions, 936 events. 643/936 cut-off events. For 549/549 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3583 event pairs, 58 based on Foata normal form. 1/935 useless extension candidates. Maximal degree in co-relation 2392. Up to 639 conditions per place. [2023-11-06 23:03:03,766 INFO L140 encePairwiseOnDemand]: 287/297 looper letters, 72 selfloop transitions, 24 changer transitions 1/98 dead transitions. [2023-11-06 23:03:03,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 98 transitions, 524 flow [2023-11-06 23:03:03,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 23:03:03,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-06 23:03:03,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 946 transitions. [2023-11-06 23:03:03,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31851851851851853 [2023-11-06 23:03:03,772 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 946 transitions. [2023-11-06 23:03:03,773 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 946 transitions. [2023-11-06 23:03:03,774 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:03:03,774 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 946 transitions. [2023-11-06 23:03:03,777 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 94.6) internal successors, (946), 10 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:03,783 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 297.0) internal successors, (3267), 11 states have internal predecessors, (3267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:03,785 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 297.0) internal successors, (3267), 11 states have internal predecessors, (3267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:03,785 INFO L175 Difference]: Start difference. First operand has 35 places, 30 transitions, 113 flow. Second operand 10 states and 946 transitions. [2023-11-06 23:03:03,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 98 transitions, 524 flow [2023-11-06 23:03:03,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 98 transitions, 508 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-11-06 23:03:03,790 INFO L231 Difference]: Finished difference. Result has 45 places, 49 transitions, 269 flow [2023-11-06 23:03:03,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=269, PETRI_PLACES=45, PETRI_TRANSITIONS=49} [2023-11-06 23:03:03,791 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 15 predicate places. [2023-11-06 23:03:03,791 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 49 transitions, 269 flow [2023-11-06 23:03:03,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 87.3913043478261) internal successors, (2010), 23 states have internal predecessors, (2010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:03,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:03:03,793 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] [2023-11-06 23:03:03,804 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 23:03:03,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:03,999 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 23:03:04,000 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:04,000 INFO L85 PathProgramCache]: Analyzing trace with hash 230471087, now seen corresponding path program 2 times [2023-11-06 23:03:04,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:04,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496513038] [2023-11-06 23:03:04,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:04,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:04,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:04,761 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:03:04,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:04,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496513038] [2023-11-06 23:03:04,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496513038] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:03:04,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109846556] [2023-11-06 23:03:04,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:03:04,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:04,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:03:04,763 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:03:04,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 23:03:04,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:03:04,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:03:04,890 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-06 23:03:04,893 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:03:05,323 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 59 treesize of output 35 [2023-11-06 23:03:05,372 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:03:05,372 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:03:05,528 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:03:05,528 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 89 treesize of output 49 [2023-11-06 23:03:05,772 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:03:05,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109846556] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:03:05,772 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:03:05,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-11-06 23:03:05,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052758058] [2023-11-06 23:03:05,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:03:05,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-06 23:03:05,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:05,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-06 23:03:05,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2023-11-06 23:03:07,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 297 [2023-11-06 23:03:07,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 49 transitions, 269 flow. Second operand has 21 states, 21 states have (on average 110.95238095238095) internal successors, (2330), 21 states have internal predecessors, (2330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:07,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:03:07,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 297 [2023-11-06 23:03:07,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:03:07,789 INFO L124 PetriNetUnfolderBase]: 811/1176 cut-off events. [2023-11-06 23:03:07,789 INFO L125 PetriNetUnfolderBase]: For 1369/1371 co-relation queries the response was YES. [2023-11-06 23:03:07,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4002 conditions, 1176 events. 811/1176 cut-off events. For 1369/1371 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 4672 event pairs, 130 based on Foata normal form. 3/1178 useless extension candidates. Maximal degree in co-relation 3526. Up to 894 conditions per place. [2023-11-06 23:03:07,804 INFO L140 encePairwiseOnDemand]: 287/297 looper letters, 71 selfloop transitions, 31 changer transitions 1/104 dead transitions. [2023-11-06 23:03:07,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 104 transitions, 702 flow [2023-11-06 23:03:07,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 23:03:07,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-06 23:03:07,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1164 transitions. [2023-11-06 23:03:07,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39191919191919194 [2023-11-06 23:03:07,813 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1164 transitions. [2023-11-06 23:03:07,813 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1164 transitions. [2023-11-06 23:03:07,815 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:03:07,815 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1164 transitions. [2023-11-06 23:03:07,819 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 116.4) internal successors, (1164), 10 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:07,828 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 297.0) internal successors, (3267), 11 states have internal predecessors, (3267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:07,831 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 297.0) internal successors, (3267), 11 states have internal predecessors, (3267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:07,832 INFO L175 Difference]: Start difference. First operand has 45 places, 49 transitions, 269 flow. Second operand 10 states and 1164 transitions. [2023-11-06 23:03:07,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 104 transitions, 702 flow [2023-11-06 23:03:07,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 104 transitions, 655 flow, removed 15 selfloop flow, removed 2 redundant places. [2023-11-06 23:03:07,844 INFO L231 Difference]: Finished difference. Result has 57 places, 68 transitions, 462 flow [2023-11-06 23:03:07,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=462, PETRI_PLACES=57, PETRI_TRANSITIONS=68} [2023-11-06 23:03:07,847 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 27 predicate places. [2023-11-06 23:03:07,848 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 68 transitions, 462 flow [2023-11-06 23:03:07,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 110.95238095238095) internal successors, (2330), 21 states have internal predecessors, (2330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:07,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:03:07,849 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] [2023-11-06 23:03:07,861 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 23:03:08,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:08,056 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 23:03:08,057 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:08,057 INFO L85 PathProgramCache]: Analyzing trace with hash -31596109, now seen corresponding path program 3 times [2023-11-06 23:03:08,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:08,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393988979] [2023-11-06 23:03:08,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:08,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:08,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:08,712 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:03:08,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:08,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393988979] [2023-11-06 23:03:08,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393988979] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:03:08,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136086686] [2023-11-06 23:03:08,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 23:03:08,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:08,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:03:08,714 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:03:08,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 23:03:08,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 23:03:08,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:03:08,849 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-06 23:03:08,852 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:03:09,153 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 59 treesize of output 35 [2023-11-06 23:03:09,241 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:03:09,241 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:03:09,351 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:03:09,351 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 89 treesize of output 49 [2023-11-06 23:03:09,616 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:03:09,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136086686] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:03:09,617 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:03:09,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-11-06 23:03:09,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298046882] [2023-11-06 23:03:09,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:03:09,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-06 23:03:09,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:09,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-06 23:03:09,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2023-11-06 23:03:10,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 297 [2023-11-06 23:03:10,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 68 transitions, 462 flow. Second operand has 20 states, 20 states have (on average 110.85) internal successors, (2217), 20 states have internal predecessors, (2217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:10,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:03:10,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 297 [2023-11-06 23:03:10,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:03:11,066 INFO L124 PetriNetUnfolderBase]: 891/1292 cut-off events. [2023-11-06 23:03:11,066 INFO L125 PetriNetUnfolderBase]: For 2458/2460 co-relation queries the response was YES. [2023-11-06 23:03:11,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5050 conditions, 1292 events. 891/1292 cut-off events. For 2458/2460 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 5235 event pairs, 174 based on Foata normal form. 3/1294 useless extension candidates. Maximal degree in co-relation 4477. Up to 1089 conditions per place. [2023-11-06 23:03:11,081 INFO L140 encePairwiseOnDemand]: 288/297 looper letters, 79 selfloop transitions, 29 changer transitions 1/110 dead transitions. [2023-11-06 23:03:11,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 110 transitions, 863 flow [2023-11-06 23:03:11,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 23:03:11,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-06 23:03:11,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1049 transitions. [2023-11-06 23:03:11,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39244294799850354 [2023-11-06 23:03:11,087 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1049 transitions. [2023-11-06 23:03:11,087 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1049 transitions. [2023-11-06 23:03:11,088 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:03:11,088 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1049 transitions. [2023-11-06 23:03:11,091 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 116.55555555555556) internal successors, (1049), 9 states have internal predecessors, (1049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:11,097 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 297.0) internal successors, (2970), 10 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:11,098 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 297.0) internal successors, (2970), 10 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:11,098 INFO L175 Difference]: Start difference. First operand has 57 places, 68 transitions, 462 flow. Second operand 9 states and 1049 transitions. [2023-11-06 23:03:11,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 110 transitions, 863 flow [2023-11-06 23:03:11,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 110 transitions, 824 flow, removed 17 selfloop flow, removed 2 redundant places. [2023-11-06 23:03:11,111 INFO L231 Difference]: Finished difference. Result has 66 places, 77 transitions, 604 flow [2023-11-06 23:03:11,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=439, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=604, PETRI_PLACES=66, PETRI_TRANSITIONS=77} [2023-11-06 23:03:11,112 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 36 predicate places. [2023-11-06 23:03:11,113 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 77 transitions, 604 flow [2023-11-06 23:03:11,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 110.85) internal successors, (2217), 20 states have internal predecessors, (2217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:11,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:03:11,114 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] [2023-11-06 23:03:11,127 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 23:03:11,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:11,321 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 23:03:11,321 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:11,321 INFO L85 PathProgramCache]: Analyzing trace with hash -541411429, now seen corresponding path program 4 times [2023-11-06 23:03:11,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:11,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397546865] [2023-11-06 23:03:11,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:11,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:11,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:11,986 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:03:11,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:11,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397546865] [2023-11-06 23:03:11,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397546865] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:03:11,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610694545] [2023-11-06 23:03:11,987 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 23:03:11,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:11,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:03:11,989 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:03:12,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 23:03:12,108 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 23:03:12,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:03:12,110 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-06 23:03:12,112 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:03:12,416 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 59 treesize of output 35 [2023-11-06 23:03:12,495 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:03:12,495 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:03:12,595 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:03:12,596 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 89 treesize of output 49 [2023-11-06 23:03:12,824 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:03:12,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610694545] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:03:12,824 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:03:12,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 21 [2023-11-06 23:03:12,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188711148] [2023-11-06 23:03:12,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:03:12,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-06 23:03:12,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:12,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-06 23:03:12,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2023-11-06 23:03:13,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 297 [2023-11-06 23:03:13,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 77 transitions, 604 flow. Second operand has 23 states, 23 states have (on average 108.69565217391305) internal successors, (2500), 23 states have internal predecessors, (2500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:13,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:03:13,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 297 [2023-11-06 23:03:13,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:03:15,343 INFO L124 PetriNetUnfolderBase]: 1324/1929 cut-off events. [2023-11-06 23:03:15,343 INFO L125 PetriNetUnfolderBase]: For 4508/4508 co-relation queries the response was YES. [2023-11-06 23:03:15,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7961 conditions, 1929 events. 1324/1929 cut-off events. For 4508/4508 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 7648 event pairs, 243 based on Foata normal form. 1/1929 useless extension candidates. Maximal degree in co-relation 6921. Up to 1419 conditions per place. [2023-11-06 23:03:15,367 INFO L140 encePairwiseOnDemand]: 285/297 looper letters, 124 selfloop transitions, 77 changer transitions 1/202 dead transitions. [2023-11-06 23:03:15,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 202 transitions, 1679 flow [2023-11-06 23:03:15,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-06 23:03:15,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-06 23:03:15,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2493 transitions. [2023-11-06 23:03:15,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38154269972451793 [2023-11-06 23:03:15,380 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2493 transitions. [2023-11-06 23:03:15,380 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2493 transitions. [2023-11-06 23:03:15,383 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:03:15,383 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2493 transitions. [2023-11-06 23:03:15,391 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 113.31818181818181) internal successors, (2493), 22 states have internal predecessors, (2493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:15,405 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 297.0) internal successors, (6831), 23 states have internal predecessors, (6831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:15,408 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 297.0) internal successors, (6831), 23 states have internal predecessors, (6831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:15,408 INFO L175 Difference]: Start difference. First operand has 66 places, 77 transitions, 604 flow. Second operand 22 states and 2493 transitions. [2023-11-06 23:03:15,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 202 transitions, 1679 flow [2023-11-06 23:03:15,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 202 transitions, 1635 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-11-06 23:03:15,431 INFO L231 Difference]: Finished difference. Result has 95 places, 127 transitions, 1305 flow [2023-11-06 23:03:15,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=575, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1305, PETRI_PLACES=95, PETRI_TRANSITIONS=127} [2023-11-06 23:03:15,435 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 65 predicate places. [2023-11-06 23:03:15,436 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 127 transitions, 1305 flow [2023-11-06 23:03:15,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 108.69565217391305) internal successors, (2500), 23 states have internal predecessors, (2500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:15,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:03:15,438 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] [2023-11-06 23:03:15,448 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 23:03:15,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-06 23:03:15,649 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 23:03:15,650 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:15,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1377451679, now seen corresponding path program 5 times [2023-11-06 23:03:15,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:15,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316274403] [2023-11-06 23:03:15,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:15,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:15,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:16,469 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:03:16,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:16,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316274403] [2023-11-06 23:03:16,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316274403] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:03:16,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966784510] [2023-11-06 23:03:16,470 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 23:03:16,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:16,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:03:16,471 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:03:16,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 23:03:16,586 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:03:16,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:03:16,589 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-06 23:03:16,593 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:03:16,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:03:16,606 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 42 treesize of output 38 [2023-11-06 23:03:16,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:03:16,968 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 29 [2023-11-06 23:03:17,171 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 38 treesize of output 29 [2023-11-06 23:03:17,385 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 59 treesize of output 35 [2023-11-06 23:03:17,465 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:03:17,465 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:03:18,162 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:03:18,162 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 443 treesize of output 403 [2023-11-06 23:03:18,189 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 207 treesize of output 195 [2023-11-06 23:03:18,208 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 195 treesize of output 171 [2023-11-06 23:03:18,221 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 171 treesize of output 159 [2023-11-06 23:03:18,232 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 159 treesize of output 153 [2023-11-06 23:03:19,801 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:03:19,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966784510] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:03:19,802 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:03:19,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 25 [2023-11-06 23:03:19,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898756608] [2023-11-06 23:03:19,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:03:19,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-06 23:03:19,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:19,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-06 23:03:19,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=595, Unknown=3, NotChecked=0, Total=702 [2023-11-06 23:03:20,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 297 [2023-11-06 23:03:20,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 127 transitions, 1305 flow. Second operand has 27 states, 27 states have (on average 84.18518518518519) internal successors, (2273), 27 states have internal predecessors, (2273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:20,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:03:20,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 297 [2023-11-06 23:03:20,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:03:22,488 INFO L124 PetriNetUnfolderBase]: 1274/1867 cut-off events. [2023-11-06 23:03:22,488 INFO L125 PetriNetUnfolderBase]: For 8821/8829 co-relation queries the response was YES. [2023-11-06 23:03:22,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9958 conditions, 1867 events. 1274/1867 cut-off events. For 8821/8829 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 8386 event pairs, 96 based on Foata normal form. 9/1847 useless extension candidates. Maximal degree in co-relation 8962. Up to 1219 conditions per place. [2023-11-06 23:03:22,515 INFO L140 encePairwiseOnDemand]: 287/297 looper letters, 114 selfloop transitions, 76 changer transitions 1/195 dead transitions. [2023-11-06 23:03:22,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 195 transitions, 2051 flow [2023-11-06 23:03:22,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-06 23:03:22,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-06 23:03:22,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1009 transitions. [2023-11-06 23:03:22,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3088460361187634 [2023-11-06 23:03:22,521 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1009 transitions. [2023-11-06 23:03:22,522 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1009 transitions. [2023-11-06 23:03:22,523 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:03:22,523 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1009 transitions. [2023-11-06 23:03:22,526 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 91.72727272727273) internal successors, (1009), 11 states have internal predecessors, (1009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:22,532 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 297.0) internal successors, (3564), 12 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:22,534 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 297.0) internal successors, (3564), 12 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:22,534 INFO L175 Difference]: Start difference. First operand has 95 places, 127 transitions, 1305 flow. Second operand 11 states and 1009 transitions. [2023-11-06 23:03:22,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 195 transitions, 2051 flow [2023-11-06 23:03:22,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 195 transitions, 1918 flow, removed 39 selfloop flow, removed 6 redundant places. [2023-11-06 23:03:22,574 INFO L231 Difference]: Finished difference. Result has 103 places, 142 transitions, 1557 flow [2023-11-06 23:03:22,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=1172, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1557, PETRI_PLACES=103, PETRI_TRANSITIONS=142} [2023-11-06 23:03:22,576 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 73 predicate places. [2023-11-06 23:03:22,576 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 142 transitions, 1557 flow [2023-11-06 23:03:22,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 84.18518518518519) internal successors, (2273), 27 states have internal predecessors, (2273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:22,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:03:22,578 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] [2023-11-06 23:03:22,588 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 23:03:22,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:22,784 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 23:03:22,785 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:22,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1938513327, now seen corresponding path program 6 times [2023-11-06 23:03:22,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:22,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461901485] [2023-11-06 23:03:22,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:22,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:22,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:23,301 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:03:23,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:23,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461901485] [2023-11-06 23:03:23,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461901485] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:03:23,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565058451] [2023-11-06 23:03:23,302 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 23:03:23,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:23,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:03:23,304 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:03:23,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 23:03:23,443 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-06 23:03:23,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:03:23,445 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-06 23:03:23,447 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:03:23,712 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 59 treesize of output 35 [2023-11-06 23:03:23,793 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:03:23,793 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:03:23,920 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:03:23,921 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 77 treesize of output 49 [2023-11-06 23:03:24,112 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:03:24,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565058451] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:03:24,112 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:03:24,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 19 [2023-11-06 23:03:24,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018513508] [2023-11-06 23:03:24,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:03:24,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-06 23:03:24,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:24,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-06 23:03:24,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2023-11-06 23:03:24,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 297 [2023-11-06 23:03:24,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 142 transitions, 1557 flow. Second operand has 21 states, 21 states have (on average 109.85714285714286) internal successors, (2307), 21 states have internal predecessors, (2307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:24,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:03:24,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 297 [2023-11-06 23:03:24,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:03:26,003 INFO L124 PetriNetUnfolderBase]: 1747/2542 cut-off events. [2023-11-06 23:03:26,004 INFO L125 PetriNetUnfolderBase]: For 14388/14388 co-relation queries the response was YES. [2023-11-06 23:03:26,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14154 conditions, 2542 events. 1747/2542 cut-off events. For 14388/14388 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 10681 event pairs, 322 based on Foata normal form. 1/2543 useless extension candidates. Maximal degree in co-relation 12817. Up to 2078 conditions per place. [2023-11-06 23:03:26,040 INFO L140 encePairwiseOnDemand]: 286/297 looper letters, 128 selfloop transitions, 101 changer transitions 1/230 dead transitions. [2023-11-06 23:03:26,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 230 transitions, 2733 flow [2023-11-06 23:03:26,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-06 23:03:26,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-06 23:03:26,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1827 transitions. [2023-11-06 23:03:26,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38446969696969696 [2023-11-06 23:03:26,048 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1827 transitions. [2023-11-06 23:03:26,048 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1827 transitions. [2023-11-06 23:03:26,050 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:03:26,050 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1827 transitions. [2023-11-06 23:03:26,055 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 114.1875) internal successors, (1827), 16 states have internal predecessors, (1827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:26,064 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 297.0) internal successors, (5049), 17 states have internal predecessors, (5049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:26,066 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 297.0) internal successors, (5049), 17 states have internal predecessors, (5049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:26,066 INFO L175 Difference]: Start difference. First operand has 103 places, 142 transitions, 1557 flow. Second operand 16 states and 1827 transitions. [2023-11-06 23:03:26,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 230 transitions, 2733 flow [2023-11-06 23:03:26,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 230 transitions, 2567 flow, removed 49 selfloop flow, removed 5 redundant places. [2023-11-06 23:03:26,148 INFO L231 Difference]: Finished difference. Result has 122 places, 181 transitions, 2221 flow [2023-11-06 23:03:26,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=1410, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2221, PETRI_PLACES=122, PETRI_TRANSITIONS=181} [2023-11-06 23:03:26,149 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 92 predicate places. [2023-11-06 23:03:26,149 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 181 transitions, 2221 flow [2023-11-06 23:03:26,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 109.85714285714286) internal successors, (2307), 21 states have internal predecessors, (2307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:26,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:03:26,150 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] [2023-11-06 23:03:26,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 23:03:26,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:26,351 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 23:03:26,351 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:26,352 INFO L85 PathProgramCache]: Analyzing trace with hash 310532207, now seen corresponding path program 7 times [2023-11-06 23:03:26,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:26,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766811159] [2023-11-06 23:03:26,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:26,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:26,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:26,874 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:03:26,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:26,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766811159] [2023-11-06 23:03:26,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766811159] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:03:26,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444179163] [2023-11-06 23:03:26,875 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 23:03:26,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:26,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:03:26,876 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:03:26,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 23:03:26,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:27,001 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-06 23:03:27,003 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:03:27,265 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 58 treesize of output 34 [2023-11-06 23:03:27,348 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:03:27,348 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:03:27,447 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:03:27,448 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 89 treesize of output 49 [2023-11-06 23:03:27,699 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:03:27,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444179163] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:03:27,699 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:03:27,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-11-06 23:03:27,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631250256] [2023-11-06 23:03:27,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:03:27,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-06 23:03:27,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:27,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-06 23:03:27,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2023-11-06 23:03:28,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 297 [2023-11-06 23:03:28,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 181 transitions, 2221 flow. Second operand has 20 states, 20 states have (on average 110.85) internal successors, (2217), 20 states have internal predecessors, (2217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:28,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:03:28,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 297 [2023-11-06 23:03:28,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:03:29,432 INFO L124 PetriNetUnfolderBase]: 1577/2343 cut-off events. [2023-11-06 23:03:29,432 INFO L125 PetriNetUnfolderBase]: For 18180/18214 co-relation queries the response was YES. [2023-11-06 23:03:29,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14480 conditions, 2343 events. 1577/2343 cut-off events. For 18180/18214 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 10605 event pairs, 314 based on Foata normal form. 35/2340 useless extension candidates. Maximal degree in co-relation 13601. Up to 2013 conditions per place. [2023-11-06 23:03:29,473 INFO L140 encePairwiseOnDemand]: 288/297 looper letters, 133 selfloop transitions, 72 changer transitions 1/214 dead transitions. [2023-11-06 23:03:29,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 214 transitions, 2857 flow [2023-11-06 23:03:29,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 23:03:29,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-06 23:03:29,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1045 transitions. [2023-11-06 23:03:29,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39094650205761317 [2023-11-06 23:03:29,481 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1045 transitions. [2023-11-06 23:03:29,481 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1045 transitions. [2023-11-06 23:03:29,482 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:03:29,482 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1045 transitions. [2023-11-06 23:03:29,487 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 116.11111111111111) internal successors, (1045), 9 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:29,491 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 297.0) internal successors, (2970), 10 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:29,492 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 297.0) internal successors, (2970), 10 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:29,493 INFO L175 Difference]: Start difference. First operand has 122 places, 181 transitions, 2221 flow. Second operand 9 states and 1045 transitions. [2023-11-06 23:03:29,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 214 transitions, 2857 flow [2023-11-06 23:03:29,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 214 transitions, 2684 flow, removed 76 selfloop flow, removed 4 redundant places. [2023-11-06 23:03:29,577 INFO L231 Difference]: Finished difference. Result has 128 places, 188 transitions, 2347 flow [2023-11-06 23:03:29,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=2062, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2347, PETRI_PLACES=128, PETRI_TRANSITIONS=188} [2023-11-06 23:03:29,579 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 98 predicate places. [2023-11-06 23:03:29,579 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 188 transitions, 2347 flow [2023-11-06 23:03:29,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 110.85) internal successors, (2217), 20 states have internal predecessors, (2217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:29,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:03:29,580 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] [2023-11-06 23:03:29,591 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 23:03:29,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:29,786 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 23:03:29,787 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:29,787 INFO L85 PathProgramCache]: Analyzing trace with hash -332766931, now seen corresponding path program 8 times [2023-11-06 23:03:29,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:29,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189403991] [2023-11-06 23:03:29,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:29,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:29,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:29,928 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:03:29,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:29,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189403991] [2023-11-06 23:03:29,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189403991] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:03:29,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690280906] [2023-11-06 23:03:29,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:03:29,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:29,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:03:29,930 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:03:29,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 23:03:30,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:03:30,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:03:30,056 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 23:03:30,058 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:03:30,144 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:03:30,144 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:03:30,218 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:03:30,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690280906] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:03:30,219 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:03:30,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-11-06 23:03:30,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559710695] [2023-11-06 23:03:30,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:03:30,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 23:03:30,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:30,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 23:03:30,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2023-11-06 23:03:30,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 297 [2023-11-06 23:03:30,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 188 transitions, 2347 flow. Second operand has 14 states, 14 states have (on average 126.14285714285714) internal successors, (1766), 14 states have internal predecessors, (1766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:30,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:03:30,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 297 [2023-11-06 23:03:30,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:03:31,243 INFO L124 PetriNetUnfolderBase]: 1945/2867 cut-off events. [2023-11-06 23:03:31,243 INFO L125 PetriNetUnfolderBase]: For 27133/27270 co-relation queries the response was YES. [2023-11-06 23:03:31,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17934 conditions, 2867 events. 1945/2867 cut-off events. For 27133/27270 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 13768 event pairs, 544 based on Foata normal form. 149/2923 useless extension candidates. Maximal degree in co-relation 17296. Up to 2149 conditions per place. [2023-11-06 23:03:31,284 INFO L140 encePairwiseOnDemand]: 291/297 looper letters, 197 selfloop transitions, 22 changer transitions 0/238 dead transitions. [2023-11-06 23:03:31,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 238 transitions, 3200 flow [2023-11-06 23:03:31,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 23:03:31,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-06 23:03:31,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1049 transitions. [2023-11-06 23:03:31,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4414983164983165 [2023-11-06 23:03:31,287 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1049 transitions. [2023-11-06 23:03:31,287 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1049 transitions. [2023-11-06 23:03:31,288 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:03:31,288 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1049 transitions. [2023-11-06 23:03:31,290 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 131.125) internal successors, (1049), 8 states have internal predecessors, (1049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:31,294 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 297.0) internal successors, (2673), 9 states have internal predecessors, (2673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:31,295 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 297.0) internal successors, (2673), 9 states have internal predecessors, (2673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:31,295 INFO L175 Difference]: Start difference. First operand has 128 places, 188 transitions, 2347 flow. Second operand 8 states and 1049 transitions. [2023-11-06 23:03:31,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 238 transitions, 3200 flow [2023-11-06 23:03:31,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 238 transitions, 3058 flow, removed 17 selfloop flow, removed 6 redundant places. [2023-11-06 23:03:31,385 INFO L231 Difference]: Finished difference. Result has 132 places, 195 transitions, 2380 flow [2023-11-06 23:03:31,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=2217, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2380, PETRI_PLACES=132, PETRI_TRANSITIONS=195} [2023-11-06 23:03:31,386 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 102 predicate places. [2023-11-06 23:03:31,386 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 195 transitions, 2380 flow [2023-11-06 23:03:31,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 126.14285714285714) internal successors, (1766), 14 states have internal predecessors, (1766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:31,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:03:31,387 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] [2023-11-06 23:03:31,398 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-06 23:03:31,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-06 23:03:31,593 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 23:03:31,594 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:31,594 INFO L85 PathProgramCache]: Analyzing trace with hash 802667665, now seen corresponding path program 9 times [2023-11-06 23:03:31,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:31,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894064215] [2023-11-06 23:03:31,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:31,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:31,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:31,709 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:03:31,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:31,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894064215] [2023-11-06 23:03:31,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894064215] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:03:31,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179005891] [2023-11-06 23:03:31,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 23:03:31,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:31,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:03:31,713 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:03:31,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 23:03:31,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 23:03:31,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:03:31,852 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 23:03:31,854 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:03:31,943 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:03:31,944 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:03:32,001 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:03:32,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179005891] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:03:32,001 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:03:32,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-11-06 23:03:32,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519203836] [2023-11-06 23:03:32,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:03:32,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 23:03:32,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:32,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 23:03:32,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2023-11-06 23:03:32,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 297 [2023-11-06 23:03:32,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 195 transitions, 2380 flow. Second operand has 14 states, 14 states have (on average 125.78571428571429) internal successors, (1761), 14 states have internal predecessors, (1761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:32,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:03:32,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 297 [2023-11-06 23:03:32,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:03:32,835 INFO L124 PetriNetUnfolderBase]: 1623/2505 cut-off events. [2023-11-06 23:03:32,835 INFO L125 PetriNetUnfolderBase]: For 23029/23142 co-relation queries the response was YES. [2023-11-06 23:03:32,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15151 conditions, 2505 events. 1623/2505 cut-off events. For 23029/23142 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 12690 event pairs, 365 based on Foata normal form. 227/2666 useless extension candidates. Maximal degree in co-relation 14885. Up to 1018 conditions per place. [2023-11-06 23:03:32,865 INFO L140 encePairwiseOnDemand]: 291/297 looper letters, 204 selfloop transitions, 31 changer transitions 0/254 dead transitions. [2023-11-06 23:03:32,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 254 transitions, 3291 flow [2023-11-06 23:03:32,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 23:03:32,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 23:03:32,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 924 transitions. [2023-11-06 23:03:32,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2023-11-06 23:03:32,870 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 924 transitions. [2023-11-06 23:03:32,870 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 924 transitions. [2023-11-06 23:03:32,871 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:03:32,871 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 924 transitions. [2023-11-06 23:03:32,872 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 132.0) internal successors, (924), 7 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:32,876 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 297.0) internal successors, (2376), 8 states have internal predecessors, (2376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:32,877 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 297.0) internal successors, (2376), 8 states have internal predecessors, (2376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:32,877 INFO L175 Difference]: Start difference. First operand has 132 places, 195 transitions, 2380 flow. Second operand 7 states and 924 transitions. [2023-11-06 23:03:32,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 254 transitions, 3291 flow [2023-11-06 23:03:32,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 254 transitions, 3254 flow, removed 14 selfloop flow, removed 4 redundant places. [2023-11-06 23:03:32,940 INFO L231 Difference]: Finished difference. Result has 135 places, 179 transitions, 2242 flow [2023-11-06 23:03:32,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=2147, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2242, PETRI_PLACES=135, PETRI_TRANSITIONS=179} [2023-11-06 23:03:32,941 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 105 predicate places. [2023-11-06 23:03:32,941 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 179 transitions, 2242 flow [2023-11-06 23:03:32,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 125.78571428571429) internal successors, (1761), 14 states have internal predecessors, (1761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:32,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:03:32,943 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:03:32,950 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 23:03:33,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:33,148 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 23:03:33,148 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:33,149 INFO L85 PathProgramCache]: Analyzing trace with hash -1469104749, now seen corresponding path program 1 times [2023-11-06 23:03:33,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:33,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320123613] [2023-11-06 23:03:33,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:33,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:33,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:33,294 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:03:33,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:33,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320123613] [2023-11-06 23:03:33,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320123613] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:03:33,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086578451] [2023-11-06 23:03:33,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:33,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:33,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:03:33,297 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:03:33,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 23:03:33,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:33,417 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 23:03:33,421 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:03:33,485 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:03:33,485 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:03:33,550 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:03:33,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086578451] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:03:33,551 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:03:33,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2023-11-06 23:03:33,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580528618] [2023-11-06 23:03:33,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:03:33,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 23:03:33,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:33,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 23:03:33,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2023-11-06 23:03:33,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 297 [2023-11-06 23:03:33,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 179 transitions, 2242 flow. Second operand has 13 states, 13 states have (on average 123.76923076923077) internal successors, (1609), 13 states have internal predecessors, (1609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:33,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:03:33,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 297 [2023-11-06 23:03:33,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:03:34,362 INFO L124 PetriNetUnfolderBase]: 1447/2285 cut-off events. [2023-11-06 23:03:34,362 INFO L125 PetriNetUnfolderBase]: For 23420/23555 co-relation queries the response was YES. [2023-11-06 23:03:34,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14047 conditions, 2285 events. 1447/2285 cut-off events. For 23420/23555 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 11378 event pairs, 470 based on Foata normal form. 325/2559 useless extension candidates. Maximal degree in co-relation 13435. Up to 1056 conditions per place. [2023-11-06 23:03:34,384 INFO L140 encePairwiseOnDemand]: 291/297 looper letters, 154 selfloop transitions, 16 changer transitions 14/202 dead transitions. [2023-11-06 23:03:34,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 202 transitions, 2752 flow [2023-11-06 23:03:34,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 23:03:34,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 23:03:34,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 779 transitions. [2023-11-06 23:03:34,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4371492704826038 [2023-11-06 23:03:34,387 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 779 transitions. [2023-11-06 23:03:34,387 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 779 transitions. [2023-11-06 23:03:34,388 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:03:34,388 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 779 transitions. [2023-11-06 23:03:34,389 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 129.83333333333334) internal successors, (779), 6 states have internal predecessors, (779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:34,392 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 297.0) internal successors, (2079), 7 states have internal predecessors, (2079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:34,393 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 297.0) internal successors, (2079), 7 states have internal predecessors, (2079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:34,393 INFO L175 Difference]: Start difference. First operand has 135 places, 179 transitions, 2242 flow. Second operand 6 states and 779 transitions. [2023-11-06 23:03:34,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 202 transitions, 2752 flow [2023-11-06 23:03:34,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 202 transitions, 2650 flow, removed 10 selfloop flow, removed 7 redundant places. [2023-11-06 23:03:34,468 INFO L231 Difference]: Finished difference. Result has 135 places, 141 transitions, 1843 flow [2023-11-06 23:03:34,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=1819, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1843, PETRI_PLACES=135, PETRI_TRANSITIONS=141} [2023-11-06 23:03:34,470 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 105 predicate places. [2023-11-06 23:03:34,470 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 141 transitions, 1843 flow [2023-11-06 23:03:34,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 123.76923076923077) internal successors, (1609), 13 states have internal predecessors, (1609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:34,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:03:34,471 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] [2023-11-06 23:03:34,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 23:03:34,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-06 23:03:34,677 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 23:03:34,677 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:34,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1520282924, now seen corresponding path program 10 times [2023-11-06 23:03:34,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:34,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850677589] [2023-11-06 23:03:34,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:34,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:34,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:34,814 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:03:34,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:34,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850677589] [2023-11-06 23:03:34,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850677589] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:03:34,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523454815] [2023-11-06 23:03:34,815 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 23:03:34,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:34,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:03:34,820 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:03:34,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 23:03:34,923 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 23:03:34,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:03:34,924 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 23:03:34,925 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:03:35,065 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:03:35,065 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:03:35,238 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:03:35,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523454815] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:03:35,238 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:03:35,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 19 [2023-11-06 23:03:35,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277313661] [2023-11-06 23:03:35,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:03:35,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-06 23:03:35,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:35,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-06 23:03:35,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2023-11-06 23:03:35,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 297 [2023-11-06 23:03:35,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 141 transitions, 1843 flow. Second operand has 19 states, 19 states have (on average 120.89473684210526) internal successors, (2297), 19 states have internal predecessors, (2297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:35,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:03:35,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 297 [2023-11-06 23:03:35,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:03:36,745 INFO L124 PetriNetUnfolderBase]: 1307/2111 cut-off events. [2023-11-06 23:03:36,745 INFO L125 PetriNetUnfolderBase]: For 21402/21472 co-relation queries the response was YES. [2023-11-06 23:03:36,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14129 conditions, 2111 events. 1307/2111 cut-off events. For 21402/21472 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 10883 event pairs, 251 based on Foata normal form. 228/2323 useless extension candidates. Maximal degree in co-relation 14065. Up to 702 conditions per place. [2023-11-06 23:03:36,764 INFO L140 encePairwiseOnDemand]: 288/297 looper letters, 105 selfloop transitions, 59 changer transitions 94/261 dead transitions. [2023-11-06 23:03:36,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 261 transitions, 3663 flow [2023-11-06 23:03:36,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-06 23:03:36,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-06 23:03:36,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2987 transitions. [2023-11-06 23:03:36,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4190516273849607 [2023-11-06 23:03:36,774 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2987 transitions. [2023-11-06 23:03:36,774 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2987 transitions. [2023-11-06 23:03:36,775 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:03:36,776 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2987 transitions. [2023-11-06 23:03:36,781 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 124.45833333333333) internal successors, (2987), 24 states have internal predecessors, (2987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:36,791 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 297.0) internal successors, (7425), 25 states have internal predecessors, (7425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:36,794 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 297.0) internal successors, (7425), 25 states have internal predecessors, (7425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:36,794 INFO L175 Difference]: Start difference. First operand has 135 places, 141 transitions, 1843 flow. Second operand 24 states and 2987 transitions. [2023-11-06 23:03:36,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 261 transitions, 3663 flow [2023-11-06 23:03:36,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 261 transitions, 3409 flow, removed 54 selfloop flow, removed 12 redundant places. [2023-11-06 23:03:36,876 INFO L231 Difference]: Finished difference. Result has 154 places, 112 transitions, 1598 flow [2023-11-06 23:03:36,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=1567, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1598, PETRI_PLACES=154, PETRI_TRANSITIONS=112} [2023-11-06 23:03:36,877 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 124 predicate places. [2023-11-06 23:03:36,877 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 112 transitions, 1598 flow [2023-11-06 23:03:36,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 120.89473684210526) internal successors, (2297), 19 states have internal predecessors, (2297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:36,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:03:36,878 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:03:36,895 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-06 23:03:37,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-06 23:03:37,085 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 23:03:37,085 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:37,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1860424469, now seen corresponding path program 11 times [2023-11-06 23:03:37,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:37,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498861576] [2023-11-06 23:03:37,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:37,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:37,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:37,237 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:03:37,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:37,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498861576] [2023-11-06 23:03:37,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498861576] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:03:37,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172216988] [2023-11-06 23:03:37,238 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 23:03:37,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:37,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:03:37,239 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:03:37,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 23:03:37,366 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:03:37,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:03:37,368 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 23:03:37,369 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:03:37,505 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:03:37,506 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:03:37,586 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:03:37,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172216988] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:03:37,586 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:03:37,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 18 [2023-11-06 23:03:37,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644119651] [2023-11-06 23:03:37,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:03:37,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 23:03:37,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:37,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 23:03:37,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2023-11-06 23:03:38,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 297 [2023-11-06 23:03:38,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 112 transitions, 1598 flow. Second operand has 18 states, 18 states have (on average 113.55555555555556) internal successors, (2044), 18 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:38,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:03:38,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 297 [2023-11-06 23:03:38,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:03:39,061 INFO L124 PetriNetUnfolderBase]: 1223/1757 cut-off events. [2023-11-06 23:03:39,062 INFO L125 PetriNetUnfolderBase]: For 26137/26137 co-relation queries the response was YES. [2023-11-06 23:03:39,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14285 conditions, 1757 events. 1223/1757 cut-off events. For 26137/26137 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 6642 event pairs, 129 based on Foata normal form. 24/1781 useless extension candidates. Maximal degree in co-relation 14226. Up to 789 conditions per place. [2023-11-06 23:03:39,076 INFO L140 encePairwiseOnDemand]: 285/297 looper letters, 194 selfloop transitions, 84 changer transitions 0/278 dead transitions. [2023-11-06 23:03:39,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 278 transitions, 4245 flow [2023-11-06 23:03:39,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-06 23:03:39,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-06 23:03:39,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2358 transitions. [2023-11-06 23:03:39,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.396969696969697 [2023-11-06 23:03:39,080 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2358 transitions. [2023-11-06 23:03:39,081 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2358 transitions. [2023-11-06 23:03:39,081 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:03:39,082 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2358 transitions. [2023-11-06 23:03:39,086 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 117.9) internal successors, (2358), 20 states have internal predecessors, (2358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:39,093 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 297.0) internal successors, (6237), 21 states have internal predecessors, (6237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:39,095 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 297.0) internal successors, (6237), 21 states have internal predecessors, (6237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:39,095 INFO L175 Difference]: Start difference. First operand has 154 places, 112 transitions, 1598 flow. Second operand 20 states and 2358 transitions. [2023-11-06 23:03:39,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 278 transitions, 4245 flow [2023-11-06 23:03:39,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 278 transitions, 2924 flow, removed 534 selfloop flow, removed 24 redundant places. [2023-11-06 23:03:39,195 INFO L231 Difference]: Finished difference. Result has 123 places, 146 transitions, 1689 flow [2023-11-06 23:03:39,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=1056, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1689, PETRI_PLACES=123, PETRI_TRANSITIONS=146} [2023-11-06 23:03:39,196 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 93 predicate places. [2023-11-06 23:03:39,196 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 146 transitions, 1689 flow [2023-11-06 23:03:39,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 113.55555555555556) internal successors, (2044), 18 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:39,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:03:39,197 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:03:39,203 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-06 23:03:39,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-06 23:03:39,403 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 23:03:39,403 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:39,403 INFO L85 PathProgramCache]: Analyzing trace with hash 69666107, now seen corresponding path program 12 times [2023-11-06 23:03:39,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:39,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497282286] [2023-11-06 23:03:39,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:39,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:39,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:39,548 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:03:39,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:39,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497282286] [2023-11-06 23:03:39,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497282286] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:03:39,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495818691] [2023-11-06 23:03:39,549 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 23:03:39,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:39,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:03:39,550 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:03:39,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-06 23:03:39,683 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-06 23:03:39,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:03:39,685 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 23:03:39,686 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:03:39,799 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:03:39,799 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:03:39,930 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:03:39,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495818691] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:03:39,931 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:03:39,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-11-06 23:03:39,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071486520] [2023-11-06 23:03:39,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:03:39,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-06 23:03:39,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:39,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-06 23:03:39,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2023-11-06 23:03:40,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 297 [2023-11-06 23:03:40,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 146 transitions, 1689 flow. Second operand has 19 states, 19 states have (on average 118.26315789473684) internal successors, (2247), 19 states have internal predecessors, (2247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:40,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:03:40,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 297 [2023-11-06 23:03:40,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:03:40,897 INFO L124 PetriNetUnfolderBase]: 1508/2178 cut-off events. [2023-11-06 23:03:40,897 INFO L125 PetriNetUnfolderBase]: For 24376/24377 co-relation queries the response was YES. [2023-11-06 23:03:40,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14924 conditions, 2178 events. 1508/2178 cut-off events. For 24376/24377 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 8748 event pairs, 348 based on Foata normal form. 12/2185 useless extension candidates. Maximal degree in co-relation 14874. Up to 1271 conditions per place. [2023-11-06 23:03:40,915 INFO L140 encePairwiseOnDemand]: 288/297 looper letters, 178 selfloop transitions, 55 changer transitions 0/241 dead transitions. [2023-11-06 23:03:40,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 241 transitions, 3163 flow [2023-11-06 23:03:40,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 23:03:40,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-06 23:03:40,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1227 transitions. [2023-11-06 23:03:40,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4131313131313131 [2023-11-06 23:03:40,919 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1227 transitions. [2023-11-06 23:03:40,919 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1227 transitions. [2023-11-06 23:03:40,920 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:03:40,920 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1227 transitions. [2023-11-06 23:03:40,922 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 122.7) internal successors, (1227), 10 states have internal predecessors, (1227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:40,926 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 297.0) internal successors, (3267), 11 states have internal predecessors, (3267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:40,928 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 297.0) internal successors, (3267), 11 states have internal predecessors, (3267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:40,928 INFO L175 Difference]: Start difference. First operand has 123 places, 146 transitions, 1689 flow. Second operand 10 states and 1227 transitions. [2023-11-06 23:03:40,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 241 transitions, 3163 flow [2023-11-06 23:03:41,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 241 transitions, 2758 flow, removed 152 selfloop flow, removed 7 redundant places. [2023-11-06 23:03:41,013 INFO L231 Difference]: Finished difference. Result has 128 places, 155 transitions, 1726 flow [2023-11-06 23:03:41,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=1448, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1726, PETRI_PLACES=128, PETRI_TRANSITIONS=155} [2023-11-06 23:03:41,014 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 98 predicate places. [2023-11-06 23:03:41,014 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 155 transitions, 1726 flow [2023-11-06 23:03:41,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 118.26315789473684) internal successors, (2247), 19 states have internal predecessors, (2247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:41,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:03:41,015 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:03:41,025 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-06 23:03:41,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-06 23:03:41,221 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 23:03:41,221 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:41,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1971368855, now seen corresponding path program 13 times [2023-11-06 23:03:41,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:41,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178941473] [2023-11-06 23:03:41,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:41,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:41,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:41,384 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:03:41,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:41,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178941473] [2023-11-06 23:03:41,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178941473] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:03:41,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221821015] [2023-11-06 23:03:41,385 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 23:03:41,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:41,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:03:41,386 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:03:41,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-06 23:03:41,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:41,523 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 23:03:41,524 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:03:41,675 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:03:41,676 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:03:41,819 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:03:41,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221821015] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:03:41,819 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:03:41,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-11-06 23:03:41,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370548498] [2023-11-06 23:03:41,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:03:41,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-06 23:03:41,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:41,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-06 23:03:41,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2023-11-06 23:03:42,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 297 [2023-11-06 23:03:42,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 155 transitions, 1726 flow. Second operand has 20 states, 20 states have (on average 118.2) internal successors, (2364), 20 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 23:03:42,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:03:42,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 297 [2023-11-06 23:03:42,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:03:43,136 INFO L124 PetriNetUnfolderBase]: 1818/2647 cut-off events. [2023-11-06 23:03:43,136 INFO L125 PetriNetUnfolderBase]: For 25836/25837 co-relation queries the response was YES. [2023-11-06 23:03:43,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17143 conditions, 2647 events. 1818/2647 cut-off events. For 25836/25837 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 11271 event pairs, 530 based on Foata normal form. 18/2663 useless extension candidates. Maximal degree in co-relation 17093. Up to 1817 conditions per place. [2023-11-06 23:03:43,158 INFO L140 encePairwiseOnDemand]: 288/297 looper letters, 245 selfloop transitions, 84 changer transitions 0/337 dead transitions. [2023-11-06 23:03:43,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 337 transitions, 4079 flow [2023-11-06 23:03:43,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-06 23:03:43,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-06 23:03:43,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1971 transitions. [2023-11-06 23:03:43,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4147727272727273 [2023-11-06 23:03:43,163 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1971 transitions. [2023-11-06 23:03:43,163 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1971 transitions. [2023-11-06 23:03:43,164 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:03:43,164 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1971 transitions. [2023-11-06 23:03:43,167 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 123.1875) internal successors, (1971), 16 states have internal predecessors, (1971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:43,173 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 297.0) internal successors, (5049), 17 states have internal predecessors, (5049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:43,174 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 297.0) internal successors, (5049), 17 states have internal predecessors, (5049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:43,175 INFO L175 Difference]: Start difference. First operand has 128 places, 155 transitions, 1726 flow. Second operand 16 states and 1971 transitions. [2023-11-06 23:03:43,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 337 transitions, 4079 flow [2023-11-06 23:03:43,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 337 transitions, 3876 flow, removed 59 selfloop flow, removed 6 redundant places. [2023-11-06 23:03:43,309 INFO L231 Difference]: Finished difference. Result has 143 places, 214 transitions, 2640 flow [2023-11-06 23:03:43,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=1628, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2640, PETRI_PLACES=143, PETRI_TRANSITIONS=214} [2023-11-06 23:03:43,309 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 113 predicate places. [2023-11-06 23:03:43,309 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 214 transitions, 2640 flow [2023-11-06 23:03:43,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 118.2) internal successors, (2364), 20 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 23:03:43,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:03:43,310 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:03:43,324 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-06 23:03:43,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-06 23:03:43,520 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 23:03:43,520 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:43,521 INFO L85 PathProgramCache]: Analyzing trace with hash 47947855, now seen corresponding path program 14 times [2023-11-06 23:03:43,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:43,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234038597] [2023-11-06 23:03:43,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:43,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:43,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:43,709 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:03:43,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:43,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234038597] [2023-11-06 23:03:43,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234038597] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:03:43,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434538302] [2023-11-06 23:03:43,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:03:43,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:43,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:03:43,711 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:03:43,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-06 23:03:43,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:03:43,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:03:43,859 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 23:03:43,860 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:03:43,989 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:03:43,989 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:03:44,129 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:03:44,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434538302] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:03:44,129 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:03:44,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-11-06 23:03:44,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799138967] [2023-11-06 23:03:44,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:03:44,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-06 23:03:44,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:44,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-06 23:03:44,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2023-11-06 23:03:44,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 297 [2023-11-06 23:03:44,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 214 transitions, 2640 flow. Second operand has 19 states, 19 states have (on average 118.15789473684211) internal successors, (2245), 19 states have internal predecessors, (2245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:44,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:03:44,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 297 [2023-11-06 23:03:44,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:03:45,246 INFO L124 PetriNetUnfolderBase]: 1846/2690 cut-off events. [2023-11-06 23:03:45,246 INFO L125 PetriNetUnfolderBase]: For 25492/25492 co-relation queries the response was YES. [2023-11-06 23:03:45,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17706 conditions, 2690 events. 1846/2690 cut-off events. For 25492/25492 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 11449 event pairs, 604 based on Foata normal form. 18/2704 useless extension candidates. Maximal degree in co-relation 17650. Up to 2169 conditions per place. [2023-11-06 23:03:45,269 INFO L140 encePairwiseOnDemand]: 288/297 looper letters, 205 selfloop transitions, 66 changer transitions 0/279 dead transitions. [2023-11-06 23:03:45,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 279 transitions, 3849 flow [2023-11-06 23:03:45,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 23:03:45,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-06 23:03:45,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1221 transitions. [2023-11-06 23:03:45,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4111111111111111 [2023-11-06 23:03:45,273 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1221 transitions. [2023-11-06 23:03:45,273 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1221 transitions. [2023-11-06 23:03:45,273 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:03:45,273 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1221 transitions. [2023-11-06 23:03:45,274 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 122.1) internal successors, (1221), 10 states have internal predecessors, (1221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:45,276 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 297.0) internal successors, (3267), 11 states have internal predecessors, (3267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:45,276 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 297.0) internal successors, (3267), 11 states have internal predecessors, (3267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:45,277 INFO L175 Difference]: Start difference. First operand has 143 places, 214 transitions, 2640 flow. Second operand 10 states and 1221 transitions. [2023-11-06 23:03:45,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 279 transitions, 3849 flow [2023-11-06 23:03:45,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 279 transitions, 3686 flow, removed 78 selfloop flow, removed 4 redundant places. [2023-11-06 23:03:45,393 INFO L231 Difference]: Finished difference. Result has 151 places, 232 transitions, 2967 flow [2023-11-06 23:03:45,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=2477, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2967, PETRI_PLACES=151, PETRI_TRANSITIONS=232} [2023-11-06 23:03:45,393 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 121 predicate places. [2023-11-06 23:03:45,394 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 232 transitions, 2967 flow [2023-11-06 23:03:45,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 118.15789473684211) internal successors, (2245), 19 states have internal predecessors, (2245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:45,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:03:45,394 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:03:45,406 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-06 23:03:45,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:45,601 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 23:03:45,601 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:45,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1060757117, now seen corresponding path program 15 times [2023-11-06 23:03:45,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:45,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133840318] [2023-11-06 23:03:45,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:45,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:45,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:45,742 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:03:45,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:45,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133840318] [2023-11-06 23:03:45,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133840318] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:03:45,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014812780] [2023-11-06 23:03:45,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 23:03:45,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:45,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:03:45,748 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:03:45,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-06 23:03:45,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 23:03:45,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:03:45,886 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 23:03:45,887 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:03:46,004 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:03:46,004 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:03:46,150 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:03:46,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014812780] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:03:46,151 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:03:46,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2023-11-06 23:03:46,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981095271] [2023-11-06 23:03:46,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:03:46,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-06 23:03:46,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:46,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-06 23:03:46,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2023-11-06 23:03:46,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 297 [2023-11-06 23:03:46,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 232 transitions, 2967 flow. Second operand has 21 states, 21 states have (on average 117.85714285714286) internal successors, (2475), 21 states have internal predecessors, (2475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:46,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:03:46,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 297 [2023-11-06 23:03:46,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:03:47,815 INFO L124 PetriNetUnfolderBase]: 2192/3174 cut-off events. [2023-11-06 23:03:47,816 INFO L125 PetriNetUnfolderBase]: For 31813/31822 co-relation queries the response was YES. [2023-11-06 23:03:47,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21429 conditions, 3174 events. 2192/3174 cut-off events. For 31813/31822 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 13939 event pairs, 340 based on Foata normal form. 20/3189 useless extension candidates. Maximal degree in co-relation 21370. Up to 1499 conditions per place. [2023-11-06 23:03:47,847 INFO L140 encePairwiseOnDemand]: 288/297 looper letters, 262 selfloop transitions, 149 changer transitions 0/419 dead transitions. [2023-11-06 23:03:47,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 419 transitions, 5640 flow [2023-11-06 23:03:47,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-06 23:03:47,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-06 23:03:47,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2228 transitions. [2023-11-06 23:03:47,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4167601945379723 [2023-11-06 23:03:47,852 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2228 transitions. [2023-11-06 23:03:47,852 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2228 transitions. [2023-11-06 23:03:47,853 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:03:47,853 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2228 transitions. [2023-11-06 23:03:47,857 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 123.77777777777777) internal successors, (2228), 18 states have internal predecessors, (2228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:47,862 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 297.0) internal successors, (5643), 19 states have internal predecessors, (5643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:47,864 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 297.0) internal successors, (5643), 19 states have internal predecessors, (5643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:47,864 INFO L175 Difference]: Start difference. First operand has 151 places, 232 transitions, 2967 flow. Second operand 18 states and 2228 transitions. [2023-11-06 23:03:47,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 419 transitions, 5640 flow [2023-11-06 23:03:48,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 419 transitions, 5459 flow, removed 27 selfloop flow, removed 8 redundant places. [2023-11-06 23:03:48,054 INFO L231 Difference]: Finished difference. Result has 165 places, 273 transitions, 3881 flow [2023-11-06 23:03:48,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=2790, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=3881, PETRI_PLACES=165, PETRI_TRANSITIONS=273} [2023-11-06 23:03:48,054 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 135 predicate places. [2023-11-06 23:03:48,055 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 273 transitions, 3881 flow [2023-11-06 23:03:48,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 117.85714285714286) internal successors, (2475), 21 states have internal predecessors, (2475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:48,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:03:48,055 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:03:48,060 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-06 23:03:48,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:48,256 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 23:03:48,256 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:48,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1012531453, now seen corresponding path program 16 times [2023-11-06 23:03:48,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:48,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628994049] [2023-11-06 23:03:48,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:48,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:48,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:48,415 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:03:48,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:48,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628994049] [2023-11-06 23:03:48,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628994049] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:03:48,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777892592] [2023-11-06 23:03:48,416 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 23:03:48,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:48,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:03:48,418 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:03:48,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-06 23:03:48,545 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 23:03:48,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:03:48,547 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 23:03:48,548 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:03:48,669 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:03:48,670 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:03:48,789 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:03:48,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777892592] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:03:48,789 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:03:48,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 18 [2023-11-06 23:03:48,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520660378] [2023-11-06 23:03:48,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:03:48,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 23:03:48,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:48,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 23:03:48,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2023-11-06 23:03:49,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 297 [2023-11-06 23:03:49,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 273 transitions, 3881 flow. Second operand has 18 states, 18 states have (on average 113.5) internal successors, (2043), 18 states have internal predecessors, (2043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:49,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:03:49,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 297 [2023-11-06 23:03:49,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:03:51,116 INFO L124 PetriNetUnfolderBase]: 2204/3178 cut-off events. [2023-11-06 23:03:51,116 INFO L125 PetriNetUnfolderBase]: For 37137/37137 co-relation queries the response was YES. [2023-11-06 23:03:51,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22813 conditions, 3178 events. 2204/3178 cut-off events. For 37137/37137 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 13744 event pairs, 165 based on Foata normal form. 18/3196 useless extension candidates. Maximal degree in co-relation 22751. Up to 1489 conditions per place. [2023-11-06 23:03:51,149 INFO L140 encePairwiseOnDemand]: 285/297 looper letters, 241 selfloop transitions, 301 changer transitions 0/542 dead transitions. [2023-11-06 23:03:51,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 542 transitions, 7629 flow [2023-11-06 23:03:51,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-11-06 23:03:51,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-11-06 23:03:51,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 5164 transitions. [2023-11-06 23:03:51,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39516375880012244 [2023-11-06 23:03:51,158 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 5164 transitions. [2023-11-06 23:03:51,158 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 5164 transitions. [2023-11-06 23:03:51,160 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:03:51,160 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 5164 transitions. [2023-11-06 23:03:51,169 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 117.36363636363636) internal successors, (5164), 44 states have internal predecessors, (5164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:51,182 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 297.0) internal successors, (13365), 45 states have internal predecessors, (13365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:51,184 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 297.0) internal successors, (13365), 45 states have internal predecessors, (13365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:51,185 INFO L175 Difference]: Start difference. First operand has 165 places, 273 transitions, 3881 flow. Second operand 44 states and 5164 transitions. [2023-11-06 23:03:51,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 542 transitions, 7629 flow [2023-11-06 23:03:51,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 542 transitions, 7112 flow, removed 178 selfloop flow, removed 7 redundant places. [2023-11-06 23:03:51,388 INFO L231 Difference]: Finished difference. Result has 203 places, 383 transitions, 5565 flow [2023-11-06 23:03:51,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=3447, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=5565, PETRI_PLACES=203, PETRI_TRANSITIONS=383} [2023-11-06 23:03:51,389 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 173 predicate places. [2023-11-06 23:03:51,389 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 383 transitions, 5565 flow [2023-11-06 23:03:51,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 113.5) internal successors, (2043), 18 states have internal predecessors, (2043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:51,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:03:51,390 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:03:51,394 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-06 23:03:51,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-06 23:03:51,592 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 23:03:51,592 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:51,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1551213199, now seen corresponding path program 17 times [2023-11-06 23:03:51,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:51,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031094676] [2023-11-06 23:03:51,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:51,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:51,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:51,743 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:03:51,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:51,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031094676] [2023-11-06 23:03:51,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031094676] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:03:51,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984916354] [2023-11-06 23:03:51,744 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 23:03:51,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:51,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:03:51,746 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:03:51,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-06 23:03:51,897 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:03:51,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:03:51,899 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 23:03:51,900 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:03:52,017 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:03:52,017 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:03:52,131 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:03:52,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984916354] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:03:52,131 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:03:52,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2023-11-06 23:03:52,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342192840] [2023-11-06 23:03:52,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:03:52,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-06 23:03:52,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:52,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-06 23:03:52,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2023-11-06 23:03:52,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 297 [2023-11-06 23:03:52,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 383 transitions, 5565 flow. Second operand has 19 states, 19 states have (on average 113.42105263157895) internal successors, (2155), 19 states have internal predecessors, (2155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:52,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:03:52,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 297 [2023-11-06 23:03:52,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:03:54,062 INFO L124 PetriNetUnfolderBase]: 2187/3145 cut-off events. [2023-11-06 23:03:54,062 INFO L125 PetriNetUnfolderBase]: For 36447/36447 co-relation queries the response was YES. [2023-11-06 23:03:54,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23313 conditions, 3145 events. 2187/3145 cut-off events. For 36447/36447 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 13439 event pairs, 341 based on Foata normal form. 12/3157 useless extension candidates. Maximal degree in co-relation 23248. Up to 1483 conditions per place. [2023-11-06 23:03:54,091 INFO L140 encePairwiseOnDemand]: 285/297 looper letters, 258 selfloop transitions, 240 changer transitions 0/498 dead transitions. [2023-11-06 23:03:54,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 498 transitions, 7322 flow [2023-11-06 23:03:54,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-06 23:03:54,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-06 23:03:54,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 3402 transitions. [2023-11-06 23:03:54,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3949843260188088 [2023-11-06 23:03:54,097 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 3402 transitions. [2023-11-06 23:03:54,097 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 3402 transitions. [2023-11-06 23:03:54,099 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:03:54,099 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 3402 transitions. [2023-11-06 23:03:54,104 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 117.3103448275862) internal successors, (3402), 29 states have internal predecessors, (3402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:54,112 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 297.0) internal successors, (8910), 30 states have internal predecessors, (8910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:54,114 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 297.0) internal successors, (8910), 30 states have internal predecessors, (8910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:54,114 INFO L175 Difference]: Start difference. First operand has 203 places, 383 transitions, 5565 flow. Second operand 29 states and 3402 transitions. [2023-11-06 23:03:54,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 498 transitions, 7322 flow [2023-11-06 23:03:54,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 498 transitions, 6510 flow, removed 182 selfloop flow, removed 16 redundant places. [2023-11-06 23:03:54,408 INFO L231 Difference]: Finished difference. Result has 214 places, 390 transitions, 5338 flow [2023-11-06 23:03:54,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=4736, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=230, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=5338, PETRI_PLACES=214, PETRI_TRANSITIONS=390} [2023-11-06 23:03:54,408 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 184 predicate places. [2023-11-06 23:03:54,408 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 390 transitions, 5338 flow [2023-11-06 23:03:54,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 113.42105263157895) internal successors, (2155), 19 states have internal predecessors, (2155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:54,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:03:54,409 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:03:54,416 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-06 23:03:54,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-06 23:03:54,610 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 23:03:54,610 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:54,610 INFO L85 PathProgramCache]: Analyzing trace with hash 415015763, now seen corresponding path program 18 times [2023-11-06 23:03:54,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:54,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438269924] [2023-11-06 23:03:54,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:54,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:54,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:54,744 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:03:54,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:54,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438269924] [2023-11-06 23:03:54,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438269924] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:03:54,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104831661] [2023-11-06 23:03:54,745 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 23:03:54,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:54,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:03:54,747 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:03:54,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-06 23:03:54,892 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-06 23:03:54,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:03:54,894 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 23:03:54,895 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:03:55,018 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:03:55,018 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:03:55,133 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:03:55,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104831661] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:03:55,133 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:03:55,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-11-06 23:03:55,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750324566] [2023-11-06 23:03:55,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:03:55,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-06 23:03:55,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:55,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-06 23:03:55,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2023-11-06 23:03:55,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 297 [2023-11-06 23:03:55,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 390 transitions, 5338 flow. Second operand has 19 states, 19 states have (on average 118.05263157894737) internal successors, (2243), 19 states have internal predecessors, (2243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:55,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:03:55,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 297 [2023-11-06 23:03:55,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:03:56,605 INFO L124 PetriNetUnfolderBase]: 2106/3042 cut-off events. [2023-11-06 23:03:56,605 INFO L125 PetriNetUnfolderBase]: For 32852/32857 co-relation queries the response was YES. [2023-11-06 23:03:56,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21763 conditions, 3042 events. 2106/3042 cut-off events. For 32852/32857 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 13074 event pairs, 610 based on Foata normal form. 19/3055 useless extension candidates. Maximal degree in co-relation 21699. Up to 2368 conditions per place. [2023-11-06 23:03:56,632 INFO L140 encePairwiseOnDemand]: 288/297 looper letters, 313 selfloop transitions, 92 changer transitions 0/433 dead transitions. [2023-11-06 23:03:56,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 433 transitions, 6387 flow [2023-11-06 23:03:56,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 23:03:56,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-06 23:03:56,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1222 transitions. [2023-11-06 23:03:56,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41144781144781145 [2023-11-06 23:03:56,634 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1222 transitions. [2023-11-06 23:03:56,634 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1222 transitions. [2023-11-06 23:03:56,635 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:03:56,635 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1222 transitions. [2023-11-06 23:03:56,636 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 122.2) internal successors, (1222), 10 states have internal predecessors, (1222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:56,639 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 297.0) internal successors, (3267), 11 states have internal predecessors, (3267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:56,640 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 297.0) internal successors, (3267), 11 states have internal predecessors, (3267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:56,640 INFO L175 Difference]: Start difference. First operand has 214 places, 390 transitions, 5338 flow. Second operand 10 states and 1222 transitions. [2023-11-06 23:03:56,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 433 transitions, 6387 flow [2023-11-06 23:03:56,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 433 transitions, 6001 flow, removed 65 selfloop flow, removed 12 redundant places. [2023-11-06 23:03:56,830 INFO L231 Difference]: Finished difference. Result has 207 places, 382 transitions, 5025 flow [2023-11-06 23:03:56,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=4841, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5025, PETRI_PLACES=207, PETRI_TRANSITIONS=382} [2023-11-06 23:03:56,830 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 177 predicate places. [2023-11-06 23:03:56,831 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 382 transitions, 5025 flow [2023-11-06 23:03:56,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 118.05263157894737) internal successors, (2243), 19 states have internal predecessors, (2243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:56,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:03:56,831 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:03:56,836 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-06 23:03:57,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-06 23:03:57,033 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 23:03:57,033 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:57,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1148388309, now seen corresponding path program 2 times [2023-11-06 23:03:57,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:57,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360553582] [2023-11-06 23:03:57,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:57,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:57,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:58,976 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:03:58,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:58,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360553582] [2023-11-06 23:03:58,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360553582] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:03:58,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797192896] [2023-11-06 23:03:58,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:03:58,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:58,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:03:58,981 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:03:59,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d28788c-1048-429c-817e-e340baf41e40/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-06 23:03:59,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:03:59,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:03:59,142 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 43 conjunts are in the unsatisfiable core [2023-11-06 23:03:59,144 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:03:59,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:03:59,590 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 38 treesize of output 29 [2023-11-06 23:03:59,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:03:59,714 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 38 treesize of output 29 [2023-11-06 23:04:00,754 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:04:00,754 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 155 treesize of output 101 [2023-11-06 23:04:01,324 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:04:01,324 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:04:03,184 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse4 (+ c_~A~0.offset (* c_thread1Thread1of1ForFork0_~i~0 4)))) (and (forall ((v_ArrVal_764 (Array Int Int))) (let ((.cse3 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_764) c_~A~0.base))) (let ((.cse0 (select .cse3 .cse4)) (.cse1 (select .cse3 c_~A~0.offset))) (or (< c_~min1~0 (+ .cse0 1)) (< c_~min2~0 (+ 1 .cse1)) (forall ((v_thread3Thread1of1ForFork2_~i~2_118 Int)) (let ((.cse2 (select .cse3 (+ c_~A~0.offset (* v_thread3Thread1of1ForFork2_~i~2_118 4))))) (or (< (+ v_thread3Thread1of1ForFork2_~i~2_118 1) c_~N~0) (= .cse2 .cse0) (< .cse1 (+ .cse2 1)) (< c_~M~0 v_thread3Thread1of1ForFork2_~i~2_118)))))))) (forall ((v_ArrVal_764 (Array Int Int))) (let ((.cse7 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_764) c_~A~0.base))) (let ((.cse6 (select .cse7 .cse4))) (or (forall ((v_thread3Thread1of1ForFork2_~i~2_118 Int)) (let ((.cse5 (select .cse7 (+ c_~A~0.offset (* v_thread3Thread1of1ForFork2_~i~2_118 4))))) (or (< (+ v_thread3Thread1of1ForFork2_~i~2_118 1) c_~N~0) (= .cse5 .cse6) (< c_~M~0 v_thread3Thread1of1ForFork2_~i~2_118) (< c_~min2~0 (+ .cse5 1))))) (< c_~min1~0 (+ .cse6 1)) (< (select .cse7 c_~A~0.offset) c_~min2~0))))) (forall ((v_ArrVal_764 (Array Int Int))) (let ((.cse9 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_764) c_~A~0.base))) (let ((.cse8 (select .cse9 c_~A~0.offset))) (or (< c_~min2~0 (+ 1 .cse8)) (< (select .cse9 .cse4) c_~min1~0) (forall ((v_thread3Thread1of1ForFork2_~i~2_118 Int)) (let ((.cse10 (select .cse9 (+ c_~A~0.offset (* v_thread3Thread1of1ForFork2_~i~2_118 4))))) (or (= c_~min1~0 .cse10) (< (+ v_thread3Thread1of1ForFork2_~i~2_118 1) c_~N~0) (< .cse8 (+ .cse10 1)) (< c_~M~0 v_thread3Thread1of1ForFork2_~i~2_118)))))))) (forall ((v_ArrVal_764 (Array Int Int))) (let ((.cse11 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_764) c_~A~0.base))) (or (< (select .cse11 c_~A~0.offset) c_~min2~0) (< (select .cse11 .cse4) c_~min1~0) (forall ((v_thread3Thread1of1ForFork2_~i~2_118 Int)) (let ((.cse12 (select .cse11 (+ c_~A~0.offset (* v_thread3Thread1of1ForFork2_~i~2_118 4))))) (or (= c_~min1~0 .cse12) (< (+ v_thread3Thread1of1ForFork2_~i~2_118 1) c_~N~0) (< c_~M~0 v_thread3Thread1of1ForFork2_~i~2_118) (< c_~min2~0 (+ .cse12 1)))))))) (forall ((v_ArrVal_764 (Array Int Int))) (let ((.cse13 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_764) c_~A~0.base))) (let ((.cse14 (select .cse13 c_~A~0.offset))) (or (forall ((v_thread3Thread1of1ForFork2_~i~2_118 Int)) (or (< (+ v_thread3Thread1of1ForFork2_~i~2_118 1) c_~N~0) (< c_~M~0 v_thread3Thread1of1ForFork2_~i~2_118) (< (select .cse13 (+ c_~A~0.offset (* v_thread3Thread1of1ForFork2_~i~2_118 4))) .cse14))) (= c_~min1~0 .cse14) (< c_~min2~0 (+ 1 .cse14)) (< (select .cse13 .cse4) c_~min1~0))))) (forall ((v_ArrVal_764 (Array Int Int))) (let ((.cse15 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_764) c_~A~0.base))) (let ((.cse17 (select .cse15 .cse4)) (.cse16 (select .cse15 c_~A~0.offset))) (or (forall ((v_thread3Thread1of1ForFork2_~i~2_118 Int)) (or (< (+ v_thread3Thread1of1ForFork2_~i~2_118 1) c_~N~0) (< c_~M~0 v_thread3Thread1of1ForFork2_~i~2_118) (< (select .cse15 (+ c_~A~0.offset (* v_thread3Thread1of1ForFork2_~i~2_118 4))) .cse16))) (< c_~min1~0 (+ .cse17 1)) (= .cse17 .cse16) (< c_~min2~0 (+ 1 .cse16)))))) (or (= c_~min2~0 c_~min1~0) (forall ((v_thread3Thread1of1ForFork2_~i~2_118 Int) (v_ArrVal_764 (Array Int Int))) (let ((.cse18 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_764) c_~A~0.base))) (or (< (+ v_thread3Thread1of1ForFork2_~i~2_118 1) c_~N~0) (< (select .cse18 c_~A~0.offset) c_~min2~0) (< (select .cse18 (+ c_~A~0.offset (* v_thread3Thread1of1ForFork2_~i~2_118 4))) c_~min2~0) (< c_~M~0 v_thread3Thread1of1ForFork2_~i~2_118) (< (select .cse18 .cse4) c_~min1~0))))) (forall ((v_ArrVal_764 (Array Int Int))) (let ((.cse20 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_764) c_~A~0.base))) (let ((.cse19 (select .cse20 .cse4))) (or (< c_~min1~0 (+ .cse19 1)) (< (select .cse20 c_~A~0.offset) c_~min2~0) (forall ((v_thread3Thread1of1ForFork2_~i~2_118 Int)) (or (< (+ v_thread3Thread1of1ForFork2_~i~2_118 1) c_~N~0) (< (select .cse20 (+ c_~A~0.offset (* v_thread3Thread1of1ForFork2_~i~2_118 4))) c_~min2~0) (< c_~M~0 v_thread3Thread1of1ForFork2_~i~2_118))) (= c_~min2~0 .cse19))))))) is different from false [2023-11-06 23:04:03,829 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ c_~A~0.offset (* c_thread1Thread1of1ForFork0_~i~0 4)))) (and (or (= c_~min2~0 c_~min1~0) (forall ((v_thread3Thread1of1ForFork2_~i~2_118 Int) (v_ArrVal_764 (Array Int Int)) (v_ArrVal_763 (Array Int Int))) (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_763) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_764) c_~A~0.base))) (or (< (select .cse0 .cse1) c_~min1~0) (< (select .cse0 c_~A~0.offset) c_~min2~0) (< (+ v_thread3Thread1of1ForFork2_~i~2_118 1) c_~N~0) (< c_~M~0 v_thread3Thread1of1ForFork2_~i~2_118) (< (select .cse0 (+ c_~A~0.offset (* v_thread3Thread1of1ForFork2_~i~2_118 4))) c_~min2~0))))) (forall ((v_ArrVal_764 (Array Int Int)) (v_ArrVal_763 (Array Int Int))) (let ((.cse4 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_763) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_764) c_~A~0.base))) (let ((.cse3 (select .cse4 .cse1))) (or (forall ((v_thread3Thread1of1ForFork2_~i~2_118 Int)) (let ((.cse2 (select .cse4 (+ c_~A~0.offset (* v_thread3Thread1of1ForFork2_~i~2_118 4))))) (or (< c_~min2~0 (+ .cse2 1)) (= .cse2 .cse3) (< (+ v_thread3Thread1of1ForFork2_~i~2_118 1) c_~N~0) (< c_~M~0 v_thread3Thread1of1ForFork2_~i~2_118)))) (< (select .cse4 c_~A~0.offset) c_~min2~0) (< c_~min1~0 (+ .cse3 1)))))) (forall ((v_ArrVal_764 (Array Int Int)) (v_ArrVal_763 (Array Int Int))) (let ((.cse5 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_763) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_764) c_~A~0.base))) (let ((.cse6 (select .cse5 c_~A~0.offset))) (or (< (select .cse5 .cse1) c_~min1~0) (= c_~min1~0 .cse6) (forall ((v_thread3Thread1of1ForFork2_~i~2_118 Int)) (or (< (select .cse5 (+ c_~A~0.offset (* v_thread3Thread1of1ForFork2_~i~2_118 4))) .cse6) (< (+ v_thread3Thread1of1ForFork2_~i~2_118 1) c_~N~0) (< c_~M~0 v_thread3Thread1of1ForFork2_~i~2_118))) (< c_~min2~0 (+ .cse6 1)))))) (forall ((v_ArrVal_764 (Array Int Int)) (v_ArrVal_763 (Array Int Int))) (let ((.cse7 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_763) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_764) c_~A~0.base))) (let ((.cse8 (select .cse7 c_~A~0.offset))) (or (< (select .cse7 .cse1) c_~min1~0) (< c_~min2~0 (+ .cse8 1)) (forall ((v_thread3Thread1of1ForFork2_~i~2_118 Int)) (let ((.cse9 (select .cse7 (+ c_~A~0.offset (* v_thread3Thread1of1ForFork2_~i~2_118 4))))) (or (< .cse8 (+ .cse9 1)) (< (+ v_thread3Thread1of1ForFork2_~i~2_118 1) c_~N~0) (< c_~M~0 v_thread3Thread1of1ForFork2_~i~2_118) (= c_~min1~0 .cse9)))))))) (forall ((v_ArrVal_764 (Array Int Int)) (v_ArrVal_763 (Array Int Int))) (let ((.cse12 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_763) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_764) c_~A~0.base))) (let ((.cse11 (select .cse12 .cse1)) (.cse10 (select .cse12 c_~A~0.offset))) (or (= .cse10 .cse11) (forall ((v_thread3Thread1of1ForFork2_~i~2_118 Int)) (or (< (select .cse12 (+ c_~A~0.offset (* v_thread3Thread1of1ForFork2_~i~2_118 4))) .cse10) (< (+ v_thread3Thread1of1ForFork2_~i~2_118 1) c_~N~0) (< c_~M~0 v_thread3Thread1of1ForFork2_~i~2_118))) (< c_~min1~0 (+ .cse11 1)) (< c_~min2~0 (+ .cse10 1)))))) (forall ((v_ArrVal_764 (Array Int Int)) (v_ArrVal_763 (Array Int Int))) (let ((.cse14 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_763) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_764) c_~A~0.base))) (let ((.cse13 (select .cse14 .cse1))) (or (= c_~min2~0 .cse13) (< (select .cse14 c_~A~0.offset) c_~min2~0) (< c_~min1~0 (+ .cse13 1)) (forall ((v_thread3Thread1of1ForFork2_~i~2_118 Int)) (or (< (+ v_thread3Thread1of1ForFork2_~i~2_118 1) c_~N~0) (< c_~M~0 v_thread3Thread1of1ForFork2_~i~2_118) (< (select .cse14 (+ c_~A~0.offset (* v_thread3Thread1of1ForFork2_~i~2_118 4))) c_~min2~0))))))) (forall ((v_ArrVal_764 (Array Int Int)) (v_ArrVal_763 (Array Int Int))) (let ((.cse15 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_763) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_764) c_~A~0.base))) (or (< (select .cse15 .cse1) c_~min1~0) (< (select .cse15 c_~A~0.offset) c_~min2~0) (forall ((v_thread3Thread1of1ForFork2_~i~2_118 Int)) (let ((.cse16 (select .cse15 (+ c_~A~0.offset (* v_thread3Thread1of1ForFork2_~i~2_118 4))))) (or (< c_~min2~0 (+ .cse16 1)) (< (+ v_thread3Thread1of1ForFork2_~i~2_118 1) c_~N~0) (< c_~M~0 v_thread3Thread1of1ForFork2_~i~2_118) (= c_~min1~0 .cse16))))))) (forall ((v_ArrVal_764 (Array Int Int)) (v_ArrVal_763 (Array Int Int))) (let ((.cse20 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_763) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_764) c_~A~0.base))) (let ((.cse18 (select .cse20 c_~A~0.offset)) (.cse17 (select .cse20 .cse1))) (or (< c_~min1~0 (+ .cse17 1)) (< c_~min2~0 (+ .cse18 1)) (forall ((v_thread3Thread1of1ForFork2_~i~2_118 Int)) (let ((.cse19 (select .cse20 (+ c_~A~0.offset (* v_thread3Thread1of1ForFork2_~i~2_118 4))))) (or (< .cse18 (+ .cse19 1)) (= .cse19 .cse17) (< (+ v_thread3Thread1of1ForFork2_~i~2_118 1) c_~N~0) (< c_~M~0 v_thread3Thread1of1ForFork2_~i~2_118)))))))))) is different from false [2023-11-06 23:04:04,929 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:04:04,930 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 3599 treesize of output 3631 [2023-11-06 23:04:05,669 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:04:05,670 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 1995 treesize of output 1964 [2023-11-06 23:04:06,017 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:04:06,018 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 1935 treesize of output 1934 [2023-11-06 23:04:06,438 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:04:06,439 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 1905 treesize of output 1888 [2023-11-06 23:04:06,838 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:04:06,839 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 1859 treesize of output 1860 [2023-11-06 23:04:07,210 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:04:07,211 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 1831 treesize of output 1845 [2023-11-06 23:04:07,632 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:04:07,633 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 1816 treesize of output 1815 [2023-11-06 23:04:07,929 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:04:07,930 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 1786 treesize of output 1759 [2023-11-06 23:04:08,239 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:04:08,240 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 1730 treesize of output 1733 [2023-11-06 23:04:08,549 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:04:08,550 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 1704 treesize of output 1681 [2023-11-06 23:04:08,902 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:04:08,903 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 1652 treesize of output 1658 [2023-11-06 23:04:09,276 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:04:09,277 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 1629 treesize of output 1637 [2023-11-06 23:04:09,651 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:04:09,652 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 1608 treesize of output 1595 [2023-11-06 23:04:10,023 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:04:10,024 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 1566 treesize of output 1576 [2023-11-06 23:04:10,430 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:04:10,431 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 1547 treesize of output 1538 [2023-11-06 23:04:10,857 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:04:10,858 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 1509 treesize of output 1516 [2023-11-06 23:04:11,270 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:04:11,271 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 1487 treesize of output 1472