./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 cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35a4872-3c55-42c9-9011-2dde5262c518/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35a4872-3c55-42c9-9011-2dde5262c518/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35a4872-3c55-42c9-9011-2dde5262c518/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35a4872-3c55-42c9-9011-2dde5262c518/bin/uautomizer-verify-uTZkv6EMXl/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_b35a4872-3c55-42c9-9011-2dde5262c518/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35a4872-3c55-42c9-9011-2dde5262c518/bin/uautomizer-verify-uTZkv6EMXl --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2261d9b3f7623cbd5155b35c39657066d179b87a48a9848bd1f196c713477a75 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:24:56,466 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:24:56,540 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35a4872-3c55-42c9-9011-2dde5262c518/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-12 02:24:56,546 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:24:56,546 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:24:56,575 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:24:56,576 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:24:56,577 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:24:56,578 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:24:56,578 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:24:56,579 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:24:56,580 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:24:56,581 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:24:56,582 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:24:56,582 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:24:56,583 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:24:56,584 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:24:56,584 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:24:56,585 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:24:56,586 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:24:56,586 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:24:56,587 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:24:56,588 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:24:56,588 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:24:56,589 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:24:56,589 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:24:56,590 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:24:56,590 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:24:56,591 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:24:56,592 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:24:56,592 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:24:56,593 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:24:56,593 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:24:56,594 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:24:56,594 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:24:56,595 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:24:56,595 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:24:56,596 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:24:56,596 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:24:56,597 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_b35a4872-3c55-42c9-9011-2dde5262c518/bin/uautomizer-verify-uTZkv6EMXl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35a4872-3c55-42c9-9011-2dde5262c518/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2261d9b3f7623cbd5155b35c39657066d179b87a48a9848bd1f196c713477a75 [2023-11-12 02:24:56,890 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:24:56,921 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:24:56,924 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:24:56,926 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:24:56,927 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:24:56,928 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35a4872-3c55-42c9-9011-2dde5262c518/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c [2023-11-12 02:25:00,059 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:25:00,320 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:25:00,321 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35a4872-3c55-42c9-9011-2dde5262c518/sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c [2023-11-12 02:25:00,329 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35a4872-3c55-42c9-9011-2dde5262c518/bin/uautomizer-verify-uTZkv6EMXl/data/f575e8bf1/57d8495093604edb9f169687cc69afb3/FLAGe2c54eca1 [2023-11-12 02:25:00,342 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35a4872-3c55-42c9-9011-2dde5262c518/bin/uautomizer-verify-uTZkv6EMXl/data/f575e8bf1/57d8495093604edb9f169687cc69afb3 [2023-11-12 02:25:00,344 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:25:00,346 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:25:00,347 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:25:00,347 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:25:00,352 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:25:00,353 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:25:00" (1/1) ... [2023-11-12 02:25:00,354 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b829154 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:25:00, skipping insertion in model container [2023-11-12 02:25:00,354 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:25:00" (1/1) ... [2023-11-12 02:25:00,380 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:25:00,567 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_b35a4872-3c55-42c9-9011-2dde5262c518/sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c[2592,2605] [2023-11-12 02:25:00,577 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:25:00,588 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:25:00,613 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_b35a4872-3c55-42c9-9011-2dde5262c518/sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c[2592,2605] [2023-11-12 02:25:00,618 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:25:00,631 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:25:00,631 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:25:00,639 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:25:00,640 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:25:00 WrapperNode [2023-11-12 02:25:00,640 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:25:00,643 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:25:00,643 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:25:00,644 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:25:00,653 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:25:00" (1/1) ... [2023-11-12 02:25:00,665 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:25:00" (1/1) ... [2023-11-12 02:25:00,694 INFO L138 Inliner]: procedures = 24, calls = 43, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 104 [2023-11-12 02:25:00,695 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:25:00,696 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:25:00,696 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:25:00,696 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:25:00,706 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:25:00" (1/1) ... [2023-11-12 02:25:00,707 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:25:00" (1/1) ... [2023-11-12 02:25:00,710 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:25:00" (1/1) ... [2023-11-12 02:25:00,711 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:25:00" (1/1) ... [2023-11-12 02:25:00,721 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:25:00" (1/1) ... [2023-11-12 02:25:00,726 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:25:00" (1/1) ... [2023-11-12 02:25:00,729 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:25:00" (1/1) ... [2023-11-12 02:25:00,731 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:25:00" (1/1) ... [2023-11-12 02:25:00,735 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:25:00,736 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:25:00,736 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:25:00,736 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:25:00,737 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:25:00" (1/1) ... [2023-11-12 02:25:00,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:25:00,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35a4872-3c55-42c9-9011-2dde5262c518/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:25:00,775 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35a4872-3c55-42c9-9011-2dde5262c518/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:25:00,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35a4872-3c55-42c9-9011-2dde5262c518/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:25:00,829 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:25:00,830 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-12 02:25:00,830 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-12 02:25:00,830 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-12 02:25:00,830 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-12 02:25:00,832 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-12 02:25:00,832 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-12 02:25:00,832 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:25:00,832 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 02:25:00,833 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 02:25:00,833 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-12 02:25:00,835 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-12 02:25:00,835 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-12 02:25:00,836 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:25:00,836 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:25:00,837 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 02:25:00,837 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 02:25:00,838 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-12 02:25:01,009 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:25:01,014 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:25:01,379 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:25:01,486 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:25:01,487 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-12 02:25:01,490 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:25:01 BoogieIcfgContainer [2023-11-12 02:25:01,490 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:25:01,493 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:25:01,493 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:25:01,497 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:25:01,498 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:25:00" (1/3) ... [2023-11-12 02:25:01,499 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a5fafbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:25:01, skipping insertion in model container [2023-11-12 02:25:01,499 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:25:00" (2/3) ... [2023-11-12 02:25:01,500 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a5fafbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:25:01, skipping insertion in model container [2023-11-12 02:25:01,500 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:25:01" (3/3) ... [2023-11-12 02:25:01,501 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-min-array.wvr.c [2023-11-12 02:25:01,510 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-12 02:25:01,521 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:25:01,521 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 02:25:01,521 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-12 02:25:01,676 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-12 02:25:01,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 157 places, 159 transitions, 339 flow [2023-11-12 02:25:01,829 INFO L124 PetriNetUnfolderBase]: 12/156 cut-off events. [2023-11-12 02:25:01,829 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-12 02:25:01,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169 conditions, 156 events. 12/156 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 103 event pairs, 0 based on Foata normal form. 0/143 useless extension candidates. Maximal degree in co-relation 116. Up to 2 conditions per place. [2023-11-12 02:25:01,836 INFO L82 GeneralOperation]: Start removeDead. Operand has 157 places, 159 transitions, 339 flow [2023-11-12 02:25:01,842 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 143 places, 145 transitions, 308 flow [2023-11-12 02:25:01,846 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:25:01,860 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 143 places, 145 transitions, 308 flow [2023-11-12 02:25:01,862 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 143 places, 145 transitions, 308 flow [2023-11-12 02:25:01,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 143 places, 145 transitions, 308 flow [2023-11-12 02:25:01,907 INFO L124 PetriNetUnfolderBase]: 12/145 cut-off events. [2023-11-12 02:25:01,908 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-12 02:25:01,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158 conditions, 145 events. 12/145 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 102 event pairs, 0 based on Foata normal form. 0/133 useless extension candidates. Maximal degree in co-relation 116. Up to 2 conditions per place. [2023-11-12 02:25:01,912 INFO L119 LiptonReduction]: Number of co-enabled transitions 1728 [2023-11-12 02:25:08,404 INFO L134 LiptonReduction]: Checked pairs total: 1826 [2023-11-12 02:25:08,405 INFO L136 LiptonReduction]: Total number of compositions: 145 [2023-11-12 02:25:08,422 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:25:08,429 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5fe77f7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:25:08,429 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-12 02:25:08,437 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:25:08,437 INFO L124 PetriNetUnfolderBase]: 4/23 cut-off events. [2023-11-12 02:25:08,437 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-12 02:25:08,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:25:08,438 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] [2023-11-12 02:25:08,439 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)] === [2023-11-12 02:25:08,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:25:08,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1294654943, now seen corresponding path program 1 times [2023-11-12 02:25:08,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:25:08,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919641021] [2023-11-12 02:25:08,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:25:08,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:25:08,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:25:09,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:25:09,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:25:09,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919641021] [2023-11-12 02:25:09,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919641021] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:25:09,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:25:09,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 02:25:09,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095061119] [2023-11-12 02:25:09,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:25:09,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:25:09,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:25:09,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:25:09,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:25:09,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 304 [2023-11-12 02:25:09,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 24 transitions, 66 flow. Second operand has 3 states, 3 states have (on average 145.66666666666666) internal successors, (437), 3 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:25:09,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:25:09,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 304 [2023-11-12 02:25:09,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:25:09,270 INFO L124 PetriNetUnfolderBase]: 429/632 cut-off events. [2023-11-12 02:25:09,271 INFO L125 PetriNetUnfolderBase]: For 55/55 co-relation queries the response was YES. [2023-11-12 02:25:09,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1341 conditions, 632 events. 429/632 cut-off events. For 55/55 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2001 event pairs, 138 based on Foata normal form. 1/468 useless extension candidates. Maximal degree in co-relation 1030. Up to 389 conditions per place. [2023-11-12 02:25:09,284 INFO L140 encePairwiseOnDemand]: 299/304 looper letters, 38 selfloop transitions, 4 changer transitions 1/43 dead transitions. [2023-11-12 02:25:09,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 43 transitions, 205 flow [2023-11-12 02:25:09,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:25:09,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:25:09,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 461 transitions. [2023-11-12 02:25:09,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5054824561403509 [2023-11-12 02:25:09,314 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 461 transitions. [2023-11-12 02:25:09,315 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 461 transitions. [2023-11-12 02:25:09,320 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:25:09,323 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 461 transitions. [2023-11-12 02:25:09,329 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:25:09,336 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 304.0) internal successors, (1216), 4 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:25:09,337 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 304.0) internal successors, (1216), 4 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:25:09,338 INFO L175 Difference]: Start difference. First operand has 30 places, 24 transitions, 66 flow. Second operand 3 states and 461 transitions. [2023-11-12 02:25:09,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 43 transitions, 205 flow [2023-11-12 02:25:09,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 43 transitions, 183 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-12 02:25:09,346 INFO L231 Difference]: Finished difference. Result has 27 places, 27 transitions, 80 flow [2023-11-12 02:25:09,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, 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} [2023-11-12 02:25:09,352 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, -3 predicate places. [2023-11-12 02:25:09,353 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 27 transitions, 80 flow [2023-11-12 02:25:09,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 145.66666666666666) internal successors, (437), 3 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:25:09,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:25:09,354 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] [2023-11-12 02:25:09,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 02:25:09,355 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)] === [2023-11-12 02:25:09,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:25:09,356 INFO L85 PathProgramCache]: Analyzing trace with hash -294529473, now seen corresponding path program 1 times [2023-11-12 02:25:09,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:25:09,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529740363] [2023-11-12 02:25:09,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:25:09,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:25:09,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:25:09,587 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:25:09,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:25:09,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529740363] [2023-11-12 02:25:09,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529740363] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:25:09,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:25:09,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:25:09,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650315249] [2023-11-12 02:25:09,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:25:09,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:25:09,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:25:09,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:25:09,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:25:09,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 304 [2023-11-12 02:25:09,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 27 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 141.0) internal successors, (423), 3 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:25:09,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:25:09,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 304 [2023-11-12 02:25:09,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:25:09,787 INFO L124 PetriNetUnfolderBase]: 429/633 cut-off events. [2023-11-12 02:25:09,787 INFO L125 PetriNetUnfolderBase]: For 124/124 co-relation queries the response was YES. [2023-11-12 02:25:09,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1541 conditions, 633 events. 429/633 cut-off events. For 124/124 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1876 event pairs, 276 based on Foata normal form. 0/632 useless extension candidates. Maximal degree in co-relation 544. Up to 633 conditions per place. [2023-11-12 02:25:09,793 INFO L140 encePairwiseOnDemand]: 301/304 looper letters, 26 selfloop transitions, 2 changer transitions 0/28 dead transitions. [2023-11-12 02:25:09,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 28 transitions, 138 flow [2023-11-12 02:25:09,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:25:09,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:25:09,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 428 transitions. [2023-11-12 02:25:09,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4692982456140351 [2023-11-12 02:25:09,798 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 428 transitions. [2023-11-12 02:25:09,799 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 428 transitions. [2023-11-12 02:25:09,802 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:25:09,803 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 428 transitions. [2023-11-12 02:25:09,804 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 142.66666666666666) internal successors, (428), 3 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:25:09,809 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 304.0) internal successors, (1216), 4 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:25:09,810 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 304.0) internal successors, (1216), 4 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:25:09,811 INFO L175 Difference]: Start difference. First operand has 27 places, 27 transitions, 80 flow. Second operand 3 states and 428 transitions. [2023-11-12 02:25:09,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 28 transitions, 138 flow [2023-11-12 02:25:09,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 28 transitions, 134 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:25:09,815 INFO L231 Difference]: Finished difference. Result has 29 places, 28 transitions, 88 flow [2023-11-12 02:25:09,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, 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} [2023-11-12 02:25:09,821 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, -1 predicate places. [2023-11-12 02:25:09,822 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 28 transitions, 88 flow [2023-11-12 02:25:09,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 141.0) internal successors, (423), 3 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:25:09,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:25:09,823 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] [2023-11-12 02:25:09,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 02:25:09,823 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)] === [2023-11-12 02:25:09,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:25:09,827 INFO L85 PathProgramCache]: Analyzing trace with hash 1981204267, now seen corresponding path program 1 times [2023-11-12 02:25:09,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:25:09,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341022999] [2023-11-12 02:25:09,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:25:09,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:25:09,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:25:09,991 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 02:25:09,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:25:09,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341022999] [2023-11-12 02:25:09,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341022999] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:25:09,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:25:09,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:25:09,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376668261] [2023-11-12 02:25:09,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:25:09,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:25:09,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:25:09,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:25:09,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:25:10,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 304 [2023-11-12 02:25:10,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 28 transitions, 88 flow. Second operand has 4 states, 4 states have (on average 137.5) internal successors, (550), 4 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:25:10,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:25:10,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 304 [2023-11-12 02:25:10,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:25:10,248 INFO L124 PetriNetUnfolderBase]: 424/625 cut-off events. [2023-11-12 02:25:10,248 INFO L125 PetriNetUnfolderBase]: For 106/106 co-relation queries the response was YES. [2023-11-12 02:25:10,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1473 conditions, 625 events. 424/625 cut-off events. For 106/106 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1870 event pairs, 186 based on Foata normal form. 50/674 useless extension candidates. Maximal degree in co-relation 1460. Up to 459 conditions per place. [2023-11-12 02:25:10,255 INFO L140 encePairwiseOnDemand]: 300/304 looper letters, 38 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2023-11-12 02:25:10,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 42 transitions, 212 flow [2023-11-12 02:25:10,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:25:10,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-12 02:25:10,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 565 transitions. [2023-11-12 02:25:10,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46463815789473684 [2023-11-12 02:25:10,258 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 565 transitions. [2023-11-12 02:25:10,259 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 565 transitions. [2023-11-12 02:25:10,259 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:25:10,259 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 565 transitions. [2023-11-12 02:25:10,262 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 141.25) internal successors, (565), 4 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:25:10,265 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 304.0) internal successors, (1520), 5 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:25:10,266 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 304.0) internal successors, (1520), 5 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:25:10,266 INFO L175 Difference]: Start difference. First operand has 29 places, 28 transitions, 88 flow. Second operand 4 states and 565 transitions. [2023-11-12 02:25:10,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 42 transitions, 212 flow [2023-11-12 02:25:10,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 42 transitions, 206 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-11-12 02:25:10,270 INFO L231 Difference]: Finished difference. Result has 32 places, 29 transitions, 101 flow [2023-11-12 02:25:10,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, 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} [2023-11-12 02:25:10,273 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 2 predicate places. [2023-11-12 02:25:10,276 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 29 transitions, 101 flow [2023-11-12 02:25:10,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 137.5) internal successors, (550), 4 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:25:10,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:25:10,278 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] [2023-11-12 02:25:10,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 02:25:10,279 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)] === [2023-11-12 02:25:10,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:25:10,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1610074385, now seen corresponding path program 1 times [2023-11-12 02:25:10,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:25:10,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558684728] [2023-11-12 02:25:10,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:25:10,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:25:10,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:25:10,413 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:25:10,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:25:10,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558684728] [2023-11-12 02:25:10,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558684728] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:25:10,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940943060] [2023-11-12 02:25:10,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:25:10,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:25:10,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35a4872-3c55-42c9-9011-2dde5262c518/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:25:10,420 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35a4872-3c55-42c9-9011-2dde5262c518/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:25:10,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35a4872-3c55-42c9-9011-2dde5262c518/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:25:10,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:25:10,561 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:25:10,567 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:25:10,643 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:25:10,643 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:25:10,684 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:25:10,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940943060] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-12 02:25:10,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:25:10,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-11-12 02:25:10,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057813445] [2023-11-12 02:25:10,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:25:10,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:25:10,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:25:10,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:25:10,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-12 02:25:10,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 304 [2023-11-12 02:25:10,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 29 transitions, 101 flow. Second operand has 5 states, 5 states have (on average 130.4) internal successors, (652), 5 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:25:10,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:25:10,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 304 [2023-11-12 02:25:10,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:25:10,925 INFO L124 PetriNetUnfolderBase]: 410/599 cut-off events. [2023-11-12 02:25:10,926 INFO L125 PetriNetUnfolderBase]: For 298/298 co-relation queries the response was YES. [2023-11-12 02:25:10,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1622 conditions, 599 events. 410/599 cut-off events. For 298/298 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1812 event pairs, 183 based on Foata normal form. 44/643 useless extension candidates. Maximal degree in co-relation 1603. Up to 452 conditions per place. [2023-11-12 02:25:10,932 INFO L140 encePairwiseOnDemand]: 299/304 looper letters, 39 selfloop transitions, 5 changer transitions 0/44 dead transitions. [2023-11-12 02:25:10,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 44 transitions, 246 flow [2023-11-12 02:25:10,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:25:10,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-12 02:25:10,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 668 transitions. [2023-11-12 02:25:10,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4394736842105263 [2023-11-12 02:25:10,939 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 668 transitions. [2023-11-12 02:25:10,939 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 668 transitions. [2023-11-12 02:25:10,940 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:25:10,940 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 668 transitions. [2023-11-12 02:25:10,943 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 133.6) internal successors, (668), 5 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:25:10,947 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 304.0) internal successors, (1824), 6 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:25:10,949 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 304.0) internal successors, (1824), 6 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:25:10,949 INFO L175 Difference]: Start difference. First operand has 32 places, 29 transitions, 101 flow. Second operand 5 states and 668 transitions. [2023-11-12 02:25:10,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 44 transitions, 246 flow [2023-11-12 02:25:10,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 44 transitions, 230 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-11-12 02:25:10,953 INFO L231 Difference]: Finished difference. Result has 35 places, 30 transitions, 113 flow [2023-11-12 02:25:10,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, 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} [2023-11-12 02:25:10,954 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 5 predicate places. [2023-11-12 02:25:10,954 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 30 transitions, 113 flow [2023-11-12 02:25:10,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 130.4) internal successors, (652), 5 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:25:10,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:25:10,955 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] [2023-11-12 02:25:10,966 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35a4872-3c55-42c9-9011-2dde5262c518/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 02:25:11,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35a4872-3c55-42c9-9011-2dde5262c518/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:25:11,162 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)] === [2023-11-12 02:25:11,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:25:11,162 INFO L85 PathProgramCache]: Analyzing trace with hash -823964103, now seen corresponding path program 1 times [2023-11-12 02:25:11,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:25:11,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328011789] [2023-11-12 02:25:11,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:25:11,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:25:11,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:25:12,263 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:25:12,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:25:12,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328011789] [2023-11-12 02:25:12,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328011789] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:25:12,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495032045] [2023-11-12 02:25:12,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:25:12,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:25:12,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35a4872-3c55-42c9-9011-2dde5262c518/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:25:12,265 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35a4872-3c55-42c9-9011-2dde5262c518/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:25:12,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35a4872-3c55-42c9-9011-2dde5262c518/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:25:12,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:25:12,393 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-12 02:25:12,397 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:25:12,535 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-12 02:25:12,625 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-12 02:25:12,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:25:12,844 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 [2023-11-12 02:25:13,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:25:13,007 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 [2023-11-12 02:25:13,207 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 [2023-11-12 02:25:13,307 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:25:13,307 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:25:14,726 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:25:14,727 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 55 [2023-11-12 02:25:14,743 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:25:14,744 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 190 treesize of output 182 [2023-11-12 02:25:14,766 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 152 treesize of output 128 [2023-11-12 02:25:14,781 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 128 treesize of output 116 [2023-11-12 02:25:14,804 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:25:14,805 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 77 [2023-11-12 02:25:15,402 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:25:15,402 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 43 [2023-11-12 02:25:15,409 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-12 02:25:15,410 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-12 02:25:15,420 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-12 02:25:15,421 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 51 treesize of output 43 [2023-11-12 02:25:15,437 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-12 02:25:15,437 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2023-11-12 02:25:15,465 INFO L322 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-12 02:25:15,466 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 1 [2023-11-12 02:25:15,479 INFO L322 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-12 02:25:15,480 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 1 [2023-11-12 02:25:15,546 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:25:15,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495032045] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:25:15,546 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:25:15,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 23 [2023-11-12 02:25:15,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444547602] [2023-11-12 02:25:15,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:25:15,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-12 02:25:15,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:25:15,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-12 02:25:15,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=481, Unknown=15, NotChecked=0, Total=600 [2023-11-12 02:25:17,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 304 [2023-11-12 02:25:17,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 30 transitions, 113 flow. Second operand has 25 states, 25 states have (on average 84.28) internal successors, (2107), 25 states have internal predecessors, (2107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:25:17,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:25:17,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 304 [2023-11-12 02:25:17,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:25:21,080 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-12 02:25:21,369 INFO L124 PetriNetUnfolderBase]: 747/1095 cut-off events. [2023-11-12 02:25:21,369 INFO L125 PetriNetUnfolderBase]: For 563/563 co-relation queries the response was YES. [2023-11-12 02:25:21,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3135 conditions, 1095 events. 747/1095 cut-off events. For 563/563 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3983 event pairs, 58 based on Foata normal form. 1/1094 useless extension candidates. Maximal degree in co-relation 2725. Up to 647 conditions per place. [2023-11-12 02:25:21,380 INFO L140 encePairwiseOnDemand]: 295/304 looper letters, 80 selfloop transitions, 23 changer transitions 1/104 dead transitions. [2023-11-12 02:25:21,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 104 transitions, 550 flow [2023-11-12 02:25:21,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-12 02:25:21,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-12 02:25:21,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 923 transitions. [2023-11-12 02:25:21,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3036184210526316 [2023-11-12 02:25:21,387 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 923 transitions. [2023-11-12 02:25:21,387 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 923 transitions. [2023-11-12 02:25:21,388 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:25:21,388 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 923 transitions. [2023-11-12 02:25:21,391 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 92.3) internal successors, (923), 10 states have internal predecessors, (923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:25:21,398 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 304.0) internal successors, (3344), 11 states have internal predecessors, (3344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:25:21,399 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 304.0) internal successors, (3344), 11 states have internal predecessors, (3344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:25:21,400 INFO L175 Difference]: Start difference. First operand has 35 places, 30 transitions, 113 flow. Second operand 10 states and 923 transitions. [2023-11-12 02:25:21,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 104 transitions, 550 flow [2023-11-12 02:25:21,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 104 transitions, 534 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-11-12 02:25:21,406 INFO L231 Difference]: Finished difference. Result has 45 places, 48 transitions, 262 flow [2023-11-12 02:25:21,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, 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=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=262, PETRI_PLACES=45, PETRI_TRANSITIONS=48} [2023-11-12 02:25:21,407 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 15 predicate places. [2023-11-12 02:25:21,407 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 48 transitions, 262 flow [2023-11-12 02:25:21,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 84.28) internal successors, (2107), 25 states have internal predecessors, (2107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:25:21,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:25:21,409 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] [2023-11-12 02:25:21,420 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35a4872-3c55-42c9-9011-2dde5262c518/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 02:25:21,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35a4872-3c55-42c9-9011-2dde5262c518/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:25:21,615 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)] === [2023-11-12 02:25:21,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:25:21,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1083045167, now seen corresponding path program 2 times [2023-11-12 02:25:21,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:25:21,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430814193] [2023-11-12 02:25:21,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:25:21,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:25:21,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:25:22,409 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:25:22,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:25:22,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430814193] [2023-11-12 02:25:22,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430814193] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:25:22,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787091972] [2023-11-12 02:25:22,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:25:22,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:25:22,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35a4872-3c55-42c9-9011-2dde5262c518/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:25:22,412 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35a4872-3c55-42c9-9011-2dde5262c518/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:25:22,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35a4872-3c55-42c9-9011-2dde5262c518/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 02:25:22,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:25:22,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:25:22,560 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-12 02:25:22,563 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:25:23,023 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 [2023-11-12 02:25:23,082 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:25:23,082 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:25:23,293 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:25:23,293 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 [2023-11-12 02:25:23,632 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:25:23,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787091972] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:25:23,632 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:25:23,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 21 [2023-11-12 02:25:23,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187305187] [2023-11-12 02:25:23,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:25:23,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-12 02:25:23,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:25:23,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-12 02:25:23,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2023-11-12 02:25:24,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 304 [2023-11-12 02:25:24,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 48 transitions, 262 flow. Second operand has 23 states, 23 states have (on average 112.8695652173913) internal successors, (2596), 23 states have internal predecessors, (2596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:25:24,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:25:24,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 304 [2023-11-12 02:25:24,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:25:26,076 INFO L124 PetriNetUnfolderBase]: 1015/1480 cut-off events. [2023-11-12 02:25:26,076 INFO L125 PetriNetUnfolderBase]: For 1557/1557 co-relation queries the response was YES. [2023-11-12 02:25:26,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4946 conditions, 1480 events. 1015/1480 cut-off events. For 1557/1557 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 5486 event pairs, 128 based on Foata normal form. 1/1480 useless extension candidates. Maximal degree in co-relation 3810. Up to 1030 conditions per place. [2023-11-12 02:25:26,093 INFO L140 encePairwiseOnDemand]: 292/304 looper letters, 89 selfloop transitions, 60 changer transitions 1/150 dead transitions. [2023-11-12 02:25:26,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 150 transitions, 990 flow [2023-11-12 02:25:26,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-12 02:25:26,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-12 02:25:26,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2222 transitions. [2023-11-12 02:25:26,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3846952908587258 [2023-11-12 02:25:26,102 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2222 transitions. [2023-11-12 02:25:26,103 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2222 transitions. [2023-11-12 02:25:26,105 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:25:26,105 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2222 transitions. [2023-11-12 02:25:26,113 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 116.94736842105263) internal successors, (2222), 19 states have internal predecessors, (2222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:25:26,124 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 304.0) internal successors, (6080), 20 states have internal predecessors, (6080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:25:26,127 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 304.0) internal successors, (6080), 20 states have internal predecessors, (6080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:25:26,127 INFO L175 Difference]: Start difference. First operand has 45 places, 48 transitions, 262 flow. Second operand 19 states and 2222 transitions. [2023-11-12 02:25:26,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 150 transitions, 990 flow [2023-11-12 02:25:26,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 150 transitions, 929 flow, removed 15 selfloop flow, removed 2 redundant places. [2023-11-12 02:25:26,139 INFO L231 Difference]: Finished difference. Result has 74 places, 95 transitions, 715 flow [2023-11-12 02:25:26,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=227, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=715, PETRI_PLACES=74, PETRI_TRANSITIONS=95} [2023-11-12 02:25:26,142 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 44 predicate places. [2023-11-12 02:25:26,142 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 95 transitions, 715 flow [2023-11-12 02:25:26,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 112.8695652173913) internal successors, (2596), 23 states have internal predecessors, (2596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:25:26,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:25:26,144 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] [2023-11-12 02:25:26,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35a4872-3c55-42c9-9011-2dde5262c518/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 02:25:26,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35a4872-3c55-42c9-9011-2dde5262c518/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-12 02:25:26,350 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)] === [2023-11-12 02:25:26,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:25:26,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1234856373, now seen corresponding path program 3 times [2023-11-12 02:25:26,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:25:26,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196940498] [2023-11-12 02:25:26,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:25:26,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:25:26,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:25:26,993 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:25:26,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:25:26,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196940498] [2023-11-12 02:25:26,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196940498] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:25:26,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124173653] [2023-11-12 02:25:26,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 02:25:26,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:25:26,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35a4872-3c55-42c9-9011-2dde5262c518/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:25:26,995 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35a4872-3c55-42c9-9011-2dde5262c518/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:25:27,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35a4872-3c55-42c9-9011-2dde5262c518/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 02:25:27,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-12 02:25:27,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:25:27,125 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-12 02:25:27,128 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:25:27,498 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 [2023-11-12 02:25:27,591 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:25:27,592 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:25:27,697 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:25:27,697 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 [2023-11-12 02:25:27,962 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:25:27,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124173653] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:25:27,962 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:25:27,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-11-12 02:25:27,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438085850] [2023-11-12 02:25:27,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:25:27,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-12 02:25:27,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:25:27,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-12 02:25:27,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2023-11-12 02:25:29,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 304 [2023-11-12 02:25:29,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 95 transitions, 715 flow. Second operand has 20 states, 20 states have (on average 114.0) internal successors, (2280), 20 states have internal predecessors, (2280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:25:29,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:25:29,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 304 [2023-11-12 02:25:29,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:25:29,988 INFO L124 PetriNetUnfolderBase]: 1133/1651 cut-off events. [2023-11-12 02:25:29,989 INFO L125 PetriNetUnfolderBase]: For 5639/5639 co-relation queries the response was YES. [2023-11-12 02:25:29,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7601 conditions, 1651 events. 1133/1651 cut-off events. For 5639/5639 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 6293 event pairs, 233 based on Foata normal form. 1/1652 useless extension candidates. Maximal degree in co-relation 6712. Up to 1341 conditions per place. [2023-11-12 02:25:30,009 INFO L140 encePairwiseOnDemand]: 295/304 looper letters, 95 selfloop transitions, 45 changer transitions 1/141 dead transitions. [2023-11-12 02:25:30,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 141 transitions, 1244 flow [2023-11-12 02:25:30,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 02:25:30,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-12 02:25:30,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1082 transitions. [2023-11-12 02:25:30,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39546783625730997 [2023-11-12 02:25:30,015 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1082 transitions. [2023-11-12 02:25:30,015 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1082 transitions. [2023-11-12 02:25:30,016 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:25:30,016 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1082 transitions. [2023-11-12 02:25:30,020 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 120.22222222222223) internal successors, (1082), 9 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:25:30,025 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 304.0) internal successors, (3040), 10 states have internal predecessors, (3040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:25:30,026 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 304.0) internal successors, (3040), 10 states have internal predecessors, (3040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:25:30,026 INFO L175 Difference]: Start difference. First operand has 74 places, 95 transitions, 715 flow. Second operand 9 states and 1082 transitions. [2023-11-12 02:25:30,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 141 transitions, 1244 flow [2023-11-12 02:25:30,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 141 transitions, 1153 flow, removed 37 selfloop flow, removed 3 redundant places. [2023-11-12 02:25:30,056 INFO L231 Difference]: Finished difference. Result has 82 places, 105 transitions, 863 flow [2023-11-12 02:25:30,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=644, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=863, PETRI_PLACES=82, PETRI_TRANSITIONS=105} [2023-11-12 02:25:30,057 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 52 predicate places. [2023-11-12 02:25:30,057 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 105 transitions, 863 flow [2023-11-12 02:25:30,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 114.0) internal successors, (2280), 20 states have internal predecessors, (2280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:25:30,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:25:30,059 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] [2023-11-12 02:25:30,069 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35a4872-3c55-42c9-9011-2dde5262c518/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 02:25:30,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35a4872-3c55-42c9-9011-2dde5262c518/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-12 02:25:30,270 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)] === [2023-11-12 02:25:30,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:25:30,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1040651449, now seen corresponding path program 4 times [2023-11-12 02:25:30,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:25:30,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450175465] [2023-11-12 02:25:30,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:25:30,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:25:30,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:25:31,004 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:25:31,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:25:31,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450175465] [2023-11-12 02:25:31,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450175465] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:25:31,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935315596] [2023-11-12 02:25:31,005 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 02:25:31,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:25:31,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35a4872-3c55-42c9-9011-2dde5262c518/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:25:31,006 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35a4872-3c55-42c9-9011-2dde5262c518/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:25:31,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35a4872-3c55-42c9-9011-2dde5262c518/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 02:25:31,133 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 02:25:31,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:25:31,135 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-12 02:25:31,137 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:25:31,506 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 [2023-11-12 02:25:31,601 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:25:31,601 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:25:31,715 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:25:31,716 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 [2023-11-12 02:25:31,948 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:25:31,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935315596] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:25:31,948 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:25:31,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 21 [2023-11-12 02:25:31,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458356464] [2023-11-12 02:25:31,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:25:31,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-12 02:25:31,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:25:31,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-12 02:25:31,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2023-11-12 02:25:33,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 304 [2023-11-12 02:25:33,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 105 transitions, 863 flow. Second operand has 23 states, 23 states have (on average 111.69565217391305) internal successors, (2569), 23 states have internal predecessors, (2569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:25:33,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:25:33,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 304 [2023-11-12 02:25:33,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:25:34,374 INFO L124 PetriNetUnfolderBase]: 1272/1859 cut-off events. [2023-11-12 02:25:34,374 INFO L125 PetriNetUnfolderBase]: For 6888/6888 co-relation queries the response was YES. [2023-11-12 02:25:34,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8806 conditions, 1859 events. 1272/1859 cut-off events. For 6888/6888 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 7425 event pairs, 164 based on Foata normal form. 1/1860 useless extension candidates. Maximal degree in co-relation 7662. Up to 1407 conditions per place. [2023-11-12 02:25:34,398 INFO L140 encePairwiseOnDemand]: 292/304 looper letters, 119 selfloop transitions, 77 changer transitions 1/197 dead transitions. [2023-11-12 02:25:34,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 197 transitions, 1732 flow [2023-11-12 02:25:34,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-12 02:25:34,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-12 02:25:34,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2330 transitions. [2023-11-12 02:25:34,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3832236842105263 [2023-11-12 02:25:34,408 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2330 transitions. [2023-11-12 02:25:34,408 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2330 transitions. [2023-11-12 02:25:34,410 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:25:34,411 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2330 transitions. [2023-11-12 02:25:34,418 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 116.5) internal successors, (2330), 20 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) [2023-11-12 02:25:34,429 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 304.0) internal successors, (6384), 21 states have internal predecessors, (6384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:25:34,431 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 304.0) internal successors, (6384), 21 states have internal predecessors, (6384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:25:34,432 INFO L175 Difference]: Start difference. First operand has 82 places, 105 transitions, 863 flow. Second operand 20 states and 2330 transitions. [2023-11-12 02:25:34,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 197 transitions, 1732 flow [2023-11-12 02:25:34,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 197 transitions, 1693 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-11-12 02:25:34,457 INFO L231 Difference]: Finished difference. Result has 103 places, 130 transitions, 1269 flow [2023-11-12 02:25:34,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=826, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1269, PETRI_PLACES=103, PETRI_TRANSITIONS=130} [2023-11-12 02:25:34,458 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 73 predicate places. [2023-11-12 02:25:34,458 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 130 transitions, 1269 flow [2023-11-12 02:25:34,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 111.69565217391305) internal successors, (2569), 23 states have internal predecessors, (2569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:25:34,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:25:34,460 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] [2023-11-12 02:25:34,464 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35a4872-3c55-42c9-9011-2dde5262c518/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 02:25:34,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35a4872-3c55-42c9-9011-2dde5262c518/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:25:34,661 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)] === [2023-11-12 02:25:34,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:25:34,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1227391427, now seen corresponding path program 5 times [2023-11-12 02:25:34,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:25:34,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439329225] [2023-11-12 02:25:34,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:25:34,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:25:34,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:25:35,338 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:25:35,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:25:35,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439329225] [2023-11-12 02:25:35,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439329225] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:25:35,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808269207] [2023-11-12 02:25:35,339 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-12 02:25:35,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:25:35,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35a4872-3c55-42c9-9011-2dde5262c518/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:25:35,340 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35a4872-3c55-42c9-9011-2dde5262c518/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:25:35,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35a4872-3c55-42c9-9011-2dde5262c518/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 02:25:35,460 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:25:35,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:25:35,462 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-12 02:25:35,465 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:25:35,800 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 [2023-11-12 02:25:35,892 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:25:35,892 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:25:36,039 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:25:36,039 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 [2023-11-12 02:25:36,409 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:25:36,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808269207] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:25:36,410 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:25:36,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-11-12 02:25:36,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192128604] [2023-11-12 02:25:36,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:25:36,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-12 02:25:36,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:25:36,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-12 02:25:36,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2023-11-12 02:25:37,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 304 [2023-11-12 02:25:37,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 130 transitions, 1269 flow. Second operand has 19 states, 19 states have (on average 114.10526315789474) internal successors, (2168), 19 states have internal predecessors, (2168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:25:37,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:25:37,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 304 [2023-11-12 02:25:37,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:25:38,574 INFO L124 PetriNetUnfolderBase]: 1550/2276 cut-off events. [2023-11-12 02:25:38,574 INFO L125 PetriNetUnfolderBase]: For 11890/11890 co-relation queries the response was YES. [2023-11-12 02:25:38,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11922 conditions, 2276 events. 1550/2276 cut-off events. For 11890/11890 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 9474 event pairs, 238 based on Foata normal form. 3/2279 useless extension candidates. Maximal degree in co-relation 11401. Up to 1609 conditions per place. [2023-11-12 02:25:38,605 INFO L140 encePairwiseOnDemand]: 294/304 looper letters, 135 selfloop transitions, 81 changer transitions 7/223 dead transitions. [2023-11-12 02:25:38,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 223 transitions, 2321 flow [2023-11-12 02:25:38,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-12 02:25:38,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-12 02:25:38,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1918 transitions. [2023-11-12 02:25:38,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39432565789473684 [2023-11-12 02:25:38,614 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1918 transitions. [2023-11-12 02:25:38,615 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1918 transitions. [2023-11-12 02:25:38,616 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:25:38,617 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1918 transitions. [2023-11-12 02:25:38,622 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 119.875) internal successors, (1918), 16 states have internal predecessors, (1918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:25:38,631 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 304.0) internal successors, (5168), 17 states have internal predecessors, (5168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:25:38,634 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 304.0) internal successors, (5168), 17 states have internal predecessors, (5168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:25:38,634 INFO L175 Difference]: Start difference. First operand has 103 places, 130 transitions, 1269 flow. Second operand 16 states and 1918 transitions. [2023-11-12 02:25:38,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 223 transitions, 2321 flow [2023-11-12 02:25:38,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 223 transitions, 2211 flow, removed 32 selfloop flow, removed 8 redundant places. [2023-11-12 02:25:38,674 INFO L231 Difference]: Finished difference. Result has 114 places, 158 transitions, 1656 flow [2023-11-12 02:25:38,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=1159, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1656, PETRI_PLACES=114, PETRI_TRANSITIONS=158} [2023-11-12 02:25:38,675 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 84 predicate places. [2023-11-12 02:25:38,675 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 158 transitions, 1656 flow [2023-11-12 02:25:38,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 114.10526315789474) internal successors, (2168), 19 states have internal predecessors, (2168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:25:38,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:25:38,677 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] [2023-11-12 02:25:38,688 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35a4872-3c55-42c9-9011-2dde5262c518/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-12 02:25:38,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35a4872-3c55-42c9-9011-2dde5262c518/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:25:38,884 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)] === [2023-11-12 02:25:38,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:25:38,884 INFO L85 PathProgramCache]: Analyzing trace with hash 635183133, now seen corresponding path program 6 times [2023-11-12 02:25:38,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:25:38,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856049874] [2023-11-12 02:25:38,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:25:38,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:25:38,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:25:39,402 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:25:39,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:25:39,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856049874] [2023-11-12 02:25:39,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856049874] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:25:39,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684199957] [2023-11-12 02:25:39,404 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-12 02:25:39,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:25:39,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35a4872-3c55-42c9-9011-2dde5262c518/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:25:39,408 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35a4872-3c55-42c9-9011-2dde5262c518/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:25:39,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35a4872-3c55-42c9-9011-2dde5262c518/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 02:25:39,555 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-12 02:25:39,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:25:39,557 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-12 02:25:39,559 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:25:39,853 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 [2023-11-12 02:25:39,945 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:25:39,945 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:25:40,042 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:25:40,043 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 [2023-11-12 02:25:40,299 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:25:40,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684199957] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:25:40,300 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:25:40,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 20 [2023-11-12 02:25:40,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501025220] [2023-11-12 02:25:40,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:25:40,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-12 02:25:40,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:25:40,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-12 02:25:40,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2023-11-12 02:25:41,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 304 [2023-11-12 02:25:41,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 158 transitions, 1656 flow. Second operand has 22 states, 22 states have (on average 112.77272727272727) internal successors, (2481), 22 states have internal predecessors, (2481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:25:41,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:25:41,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 304 [2023-11-12 02:25:41,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:25:42,104 INFO L124 PetriNetUnfolderBase]: 1644/2415 cut-off events. [2023-11-12 02:25:42,105 INFO L125 PetriNetUnfolderBase]: For 13567/13567 co-relation queries the response was YES. [2023-11-12 02:25:42,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13313 conditions, 2415 events. 1644/2415 cut-off events. For 13567/13567 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 10173 event pairs, 258 based on Foata normal form. 1/2416 useless extension candidates. Maximal degree in co-relation 12993. Up to 2088 conditions per place. [2023-11-12 02:25:42,140 INFO L140 encePairwiseOnDemand]: 293/304 looper letters, 141 selfloop transitions, 68 changer transitions 1/210 dead transitions. [2023-11-12 02:25:42,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 210 transitions, 2366 flow [2023-11-12 02:25:42,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-12 02:25:42,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-12 02:25:42,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2099 transitions. [2023-11-12 02:25:42,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38358918128654973 [2023-11-12 02:25:42,151 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2099 transitions. [2023-11-12 02:25:42,151 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2099 transitions. [2023-11-12 02:25:42,153 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:25:42,153 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2099 transitions. [2023-11-12 02:25:42,158 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 116.61111111111111) internal successors, (2099), 18 states have internal predecessors, (2099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:25:42,168 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 304.0) internal successors, (5776), 19 states have internal predecessors, (5776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:25:42,169 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 304.0) internal successors, (5776), 19 states have internal predecessors, (5776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:25:42,169 INFO L175 Difference]: Start difference. First operand has 114 places, 158 transitions, 1656 flow. Second operand 18 states and 2099 transitions. [2023-11-12 02:25:42,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 210 transitions, 2366 flow [2023-11-12 02:25:42,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 210 transitions, 2121 flow, removed 92 selfloop flow, removed 6 redundant places. [2023-11-12 02:25:42,232 INFO L231 Difference]: Finished difference. Result has 127 places, 166 transitions, 1686 flow [2023-11-12 02:25:42,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=1426, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1686, PETRI_PLACES=127, PETRI_TRANSITIONS=166} [2023-11-12 02:25:42,233 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 97 predicate places. [2023-11-12 02:25:42,233 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 166 transitions, 1686 flow [2023-11-12 02:25:42,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 112.77272727272727) internal successors, (2481), 22 states have internal predecessors, (2481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:25:42,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:25:42,234 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] [2023-11-12 02:25:42,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35a4872-3c55-42c9-9011-2dde5262c518/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-12 02:25:42,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35a4872-3c55-42c9-9011-2dde5262c518/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-12 02:25:42,448 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)] === [2023-11-12 02:25:42,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:25:42,449 INFO L85 PathProgramCache]: Analyzing trace with hash 2065078269, now seen corresponding path program 7 times [2023-11-12 02:25:42,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:25:42,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627665401] [2023-11-12 02:25:42,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:25:42,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:25:42,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:25:42,585 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:25:42,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:25:42,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627665401] [2023-11-12 02:25:42,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627665401] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:25:42,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825783312] [2023-11-12 02:25:42,586 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-12 02:25:42,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:25:42,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35a4872-3c55-42c9-9011-2dde5262c518/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:25:42,587 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35a4872-3c55-42c9-9011-2dde5262c518/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:25:42,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35a4872-3c55-42c9-9011-2dde5262c518/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-12 02:25:42,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:25:42,709 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-12 02:25:42,711 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:25:42,795 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:25:42,795 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:25:42,881 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:25:42,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825783312] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:25:42,882 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:25:42,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-11-12 02:25:42,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550349063] [2023-11-12 02:25:42,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:25:42,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-12 02:25:42,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:25:42,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-12 02:25:42,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2023-11-12 02:25:43,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 304 [2023-11-12 02:25:43,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 166 transitions, 1686 flow. Second operand has 14 states, 14 states have (on average 129.35714285714286) internal successors, (1811), 14 states have internal predecessors, (1811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:25:43,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:25:43,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 304 [2023-11-12 02:25:43,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:25:43,923 INFO L124 PetriNetUnfolderBase]: 2042/2991 cut-off events. [2023-11-12 02:25:43,924 INFO L125 PetriNetUnfolderBase]: For 18772/18772 co-relation queries the response was YES. [2023-11-12 02:25:43,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16476 conditions, 2991 events. 2042/2991 cut-off events. For 18772/18772 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 13089 event pairs, 662 based on Foata normal form. 48/3039 useless extension candidates. Maximal degree in co-relation 16221. Up to 2202 conditions per place. [2023-11-12 02:25:43,952 INFO L140 encePairwiseOnDemand]: 298/304 looper letters, 204 selfloop transitions, 24 changer transitions 0/228 dead transitions. [2023-11-12 02:25:43,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 228 transitions, 2707 flow [2023-11-12 02:25:43,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 02:25:43,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-12 02:25:43,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1081 transitions. [2023-11-12 02:25:43,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44449013157894735 [2023-11-12 02:25:43,956 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1081 transitions. [2023-11-12 02:25:43,956 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1081 transitions. [2023-11-12 02:25:43,956 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:25:43,956 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1081 transitions. [2023-11-12 02:25:43,958 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 135.125) internal successors, (1081), 8 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:25:43,962 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 304.0) internal successors, (2736), 9 states have internal predecessors, (2736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:25:43,963 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 304.0) internal successors, (2736), 9 states have internal predecessors, (2736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:25:43,963 INFO L175 Difference]: Start difference. First operand has 127 places, 166 transitions, 1686 flow. Second operand 8 states and 1081 transitions. [2023-11-12 02:25:43,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 228 transitions, 2707 flow [2023-11-12 02:25:44,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 228 transitions, 2533 flow, removed 40 selfloop flow, removed 14 redundant places. [2023-11-12 02:25:44,020 INFO L231 Difference]: Finished difference. Result has 123 places, 172 transitions, 1705 flow [2023-11-12 02:25:44,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=1547, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1705, PETRI_PLACES=123, PETRI_TRANSITIONS=172} [2023-11-12 02:25:44,021 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 93 predicate places. [2023-11-12 02:25:44,022 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 172 transitions, 1705 flow [2023-11-12 02:25:44,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 129.35714285714286) internal successors, (1811), 14 states have internal predecessors, (1811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:25:44,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:25:44,023 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] [2023-11-12 02:25:44,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35a4872-3c55-42c9-9011-2dde5262c518/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-12 02:25:44,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35a4872-3c55-42c9-9011-2dde5262c518/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:25:44,228 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)] === [2023-11-12 02:25:44,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:25:44,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1070953805, now seen corresponding path program 8 times [2023-11-12 02:25:44,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:25:44,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103919715] [2023-11-12 02:25:44,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:25:44,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:25:44,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:25:44,352 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:25:44,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:25:44,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103919715] [2023-11-12 02:25:44,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103919715] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:25:44,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355600187] [2023-11-12 02:25:44,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:25:44,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:25:44,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35a4872-3c55-42c9-9011-2dde5262c518/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:25:44,354 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35a4872-3c55-42c9-9011-2dde5262c518/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:25:44,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35a4872-3c55-42c9-9011-2dde5262c518/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-12 02:25:44,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:25:44,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:25:44,484 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-12 02:25:44,485 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:25:44,604 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:25:44,604 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:25:44,720 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:25:44,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355600187] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:25:44,720 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:25:44,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 19 [2023-11-12 02:25:44,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023847063] [2023-11-12 02:25:44,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:25:44,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-12 02:25:44,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:25:44,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-12 02:25:44,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2023-11-12 02:25:45,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 304 [2023-11-12 02:25:45,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 172 transitions, 1705 flow. Second operand has 19 states, 19 states have (on average 116.6842105263158) internal successors, (2217), 19 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) [2023-11-12 02:25:45,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:25:45,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 304 [2023-11-12 02:25:45,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand