./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220c8820-a846-492a-85f0-cbdb48594fa3/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220c8820-a846-492a-85f0-cbdb48594fa3/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220c8820-a846-492a-85f0-cbdb48594fa3/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220c8820-a846-492a-85f0-cbdb48594fa3/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220c8820-a846-492a-85f0-cbdb48594fa3/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220c8820-a846-492a-85f0-cbdb48594fa3/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f83ae5bec1717d6f197d4259600c0d1f406909832409df09253b7bf70d3f66fc --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 21:14:13,375 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 21:14:13,443 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220c8820-a846-492a-85f0-cbdb48594fa3/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 21:14:13,449 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 21:14:13,450 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 21:14:13,476 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 21:14:13,476 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 21:14:13,477 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 21:14:13,478 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 21:14:13,479 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 21:14:13,479 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 21:14:13,480 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 21:14:13,481 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 21:14:13,481 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 21:14:13,482 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 21:14:13,483 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 21:14:13,483 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 21:14:13,484 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 21:14:13,484 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 21:14:13,485 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 21:14:13,486 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 21:14:13,486 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 21:14:13,487 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 21:14:13,487 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 21:14:13,488 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 21:14:13,489 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 21:14:13,489 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 21:14:13,490 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 21:14:13,490 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:14:13,491 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 21:14:13,491 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 21:14:13,492 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 21:14:13,492 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 21:14:13,501 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 21:14:13,501 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 21:14:13,502 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 21:14:13,502 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 21:14:13,503 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 21:14:13,503 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 21:14:13,504 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_220c8820-a846-492a-85f0-cbdb48594fa3/bin/uautomizer-verify-WvqO1wxjHP/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220c8820-a846-492a-85f0-cbdb48594fa3/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f83ae5bec1717d6f197d4259600c0d1f406909832409df09253b7bf70d3f66fc [2023-11-06 21:14:13,807 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 21:14:13,833 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 21:14:13,838 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 21:14:13,840 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 21:14:13,841 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 21:14:13,842 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220c8820-a846-492a-85f0-cbdb48594fa3/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c [2023-11-06 21:14:16,956 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 21:14:17,154 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 21:14:17,154 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220c8820-a846-492a-85f0-cbdb48594fa3/sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c [2023-11-06 21:14:17,164 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220c8820-a846-492a-85f0-cbdb48594fa3/bin/uautomizer-verify-WvqO1wxjHP/data/314e7c473/a6d42f7ec8b64b719e45baca568b95c2/FLAG355818130 [2023-11-06 21:14:17,180 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220c8820-a846-492a-85f0-cbdb48594fa3/bin/uautomizer-verify-WvqO1wxjHP/data/314e7c473/a6d42f7ec8b64b719e45baca568b95c2 [2023-11-06 21:14:17,182 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 21:14:17,184 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 21:14:17,186 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 21:14:17,186 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 21:14:17,192 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 21:14:17,193 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:14:17" (1/1) ... [2023-11-06 21:14:17,194 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b096c20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:17, skipping insertion in model container [2023-11-06 21:14:17,194 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:14:17" (1/1) ... [2023-11-06 21:14:17,235 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 21:14:17,487 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_220c8820-a846-492a-85f0-cbdb48594fa3/sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c[4232,4245] [2023-11-06 21:14:17,501 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:14:17,518 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 21:14:17,556 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_220c8820-a846-492a-85f0-cbdb48594fa3/sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c[4232,4245] [2023-11-06 21:14:17,561 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:14:17,571 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 21:14:17,571 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 21:14:17,581 INFO L206 MainTranslator]: Completed translation [2023-11-06 21:14:17,582 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:17 WrapperNode [2023-11-06 21:14:17,582 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 21:14:17,583 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 21:14:17,585 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 21:14:17,585 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 21:14:17,593 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:17" (1/1) ... [2023-11-06 21:14:17,605 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:17" (1/1) ... [2023-11-06 21:14:17,648 INFO L138 Inliner]: procedures = 27, calls = 83, calls flagged for inlining = 22, calls inlined = 28, statements flattened = 356 [2023-11-06 21:14:17,648 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 21:14:17,649 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 21:14:17,650 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 21:14:17,650 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 21:14:17,661 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:17" (1/1) ... [2023-11-06 21:14:17,661 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:17" (1/1) ... [2023-11-06 21:14:17,668 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:17" (1/1) ... [2023-11-06 21:14:17,668 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:17" (1/1) ... [2023-11-06 21:14:17,682 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:17" (1/1) ... [2023-11-06 21:14:17,688 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:17" (1/1) ... [2023-11-06 21:14:17,691 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:17" (1/1) ... [2023-11-06 21:14:17,709 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:17" (1/1) ... [2023-11-06 21:14:17,715 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 21:14:17,716 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 21:14:17,716 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 21:14:17,717 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 21:14:17,718 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:17" (1/1) ... [2023-11-06 21:14:17,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:14:17,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220c8820-a846-492a-85f0-cbdb48594fa3/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:14:17,769 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220c8820-a846-492a-85f0-cbdb48594fa3/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 21:14:17,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220c8820-a846-492a-85f0-cbdb48594fa3/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 21:14:17,817 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 21:14:17,818 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 21:14:17,818 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 21:14:17,818 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 21:14:17,818 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-06 21:14:17,818 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-06 21:14:17,819 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-06 21:14:17,819 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-06 21:14:17,819 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-06 21:14:17,819 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-06 21:14:17,819 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-11-06 21:14:17,821 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-11-06 21:14:17,822 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 21:14:17,822 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-06 21:14:17,822 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-06 21:14:17,822 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 21:14:17,823 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 21:14:17,823 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 21:14:17,823 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 21:14:17,825 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-06 21:14:18,006 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 21:14:18,009 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 21:14:18,664 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 21:14:18,980 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 21:14:18,980 INFO L302 CfgBuilder]: Removed 7 assume(true) statements. [2023-11-06 21:14:18,983 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:14:18 BoogieIcfgContainer [2023-11-06 21:14:18,984 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 21:14:18,987 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 21:14:18,988 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 21:14:18,992 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 21:14:18,992 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 09:14:17" (1/3) ... [2023-11-06 21:14:18,993 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15b2341d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:14:18, skipping insertion in model container [2023-11-06 21:14:18,994 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:17" (2/3) ... [2023-11-06 21:14:18,995 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15b2341d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:14:18, skipping insertion in model container [2023-11-06 21:14:18,995 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:14:18" (3/3) ... [2023-11-06 21:14:18,997 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-buffer-series2.wvr.c [2023-11-06 21:14:19,007 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-06 21:14:19,020 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 21:14:19,020 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 21:14:19,020 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 21:14:19,128 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-06 21:14:19,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 263 places, 272 transitions, 572 flow [2023-11-06 21:14:19,363 INFO L124 PetriNetUnfolderBase]: 22/268 cut-off events. [2023-11-06 21:14:19,363 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-06 21:14:19,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 285 conditions, 268 events. 22/268 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 133 event pairs, 0 based on Foata normal form. 0/245 useless extension candidates. Maximal degree in co-relation 229. Up to 2 conditions per place. [2023-11-06 21:14:19,374 INFO L82 GeneralOperation]: Start removeDead. Operand has 263 places, 272 transitions, 572 flow [2023-11-06 21:14:19,386 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 246 places, 255 transitions, 534 flow [2023-11-06 21:14:19,390 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 21:14:19,405 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 246 places, 255 transitions, 534 flow [2023-11-06 21:14:19,408 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 246 places, 255 transitions, 534 flow [2023-11-06 21:14:19,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 246 places, 255 transitions, 534 flow [2023-11-06 21:14:19,470 INFO L124 PetriNetUnfolderBase]: 22/255 cut-off events. [2023-11-06 21:14:19,471 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-06 21:14:19,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 272 conditions, 255 events. 22/255 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 133 event pairs, 0 based on Foata normal form. 0/233 useless extension candidates. Maximal degree in co-relation 229. Up to 2 conditions per place. [2023-11-06 21:14:19,478 INFO L119 LiptonReduction]: Number of co-enabled transitions 1824 [2023-11-06 21:14:31,345 INFO L134 LiptonReduction]: Checked pairs total: 3077 [2023-11-06 21:14:31,346 INFO L136 LiptonReduction]: Total number of compositions: 259 [2023-11-06 21:14:31,361 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 21:14:31,368 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4fdca94e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 21:14:31,368 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-06 21:14:31,377 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 21:14:31,378 INFO L124 PetriNetUnfolderBase]: 7/36 cut-off events. [2023-11-06 21:14:31,378 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-06 21:14:31,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:14:31,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:14:31,380 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 2 more)] === [2023-11-06 21:14:31,385 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:14:31,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1055821433, now seen corresponding path program 1 times [2023-11-06 21:14:31,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:14:31,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202038589] [2023-11-06 21:14:31,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:14:31,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:14:31,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:14:31,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:14:31,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:14:31,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202038589] [2023-11-06 21:14:31,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202038589] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:14:31,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:14:31,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 21:14:31,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612143973] [2023-11-06 21:14:31,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:14:31,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:14:31,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:14:32,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:14:32,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:14:32,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 243 out of 531 [2023-11-06 21:14:32,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 37 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 251.0) internal successors, (753), 3 states have internal predecessors, (753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:32,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:14:32,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 243 of 531 [2023-11-06 21:14:32,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:14:32,516 INFO L124 PetriNetUnfolderBase]: 1620/2219 cut-off events. [2023-11-06 21:14:32,516 INFO L125 PetriNetUnfolderBase]: For 143/143 co-relation queries the response was YES. [2023-11-06 21:14:32,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4420 conditions, 2219 events. 1620/2219 cut-off events. For 143/143 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 8912 event pairs, 272 based on Foata normal form. 1/1334 useless extension candidates. Maximal degree in co-relation 3417. Up to 1413 conditions per place. [2023-11-06 21:14:32,543 INFO L140 encePairwiseOnDemand]: 527/531 looper letters, 45 selfloop transitions, 3 changer transitions 1/55 dead transitions. [2023-11-06 21:14:32,543 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 55 transitions, 247 flow [2023-11-06 21:14:32,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:14:32,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 21:14:32,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 779 transitions. [2023-11-06 21:14:32,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48901443816698054 [2023-11-06 21:14:32,572 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 779 transitions. [2023-11-06 21:14:32,573 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 779 transitions. [2023-11-06 21:14:32,578 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:14:32,581 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 779 transitions. [2023-11-06 21:14:32,588 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 259.6666666666667) internal successors, (779), 3 states have internal predecessors, (779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:32,597 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 531.0) internal successors, (2124), 4 states have internal predecessors, (2124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:32,599 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 531.0) internal successors, (2124), 4 states have internal predecessors, (2124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:32,601 INFO L175 Difference]: Start difference. First operand has 43 places, 37 transitions, 98 flow. Second operand 3 states and 779 transitions. [2023-11-06 21:14:32,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 55 transitions, 247 flow [2023-11-06 21:14:32,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 55 transitions, 221 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-11-06 21:14:32,614 INFO L231 Difference]: Finished difference. Result has 38 places, 39 transitions, 101 flow [2023-11-06 21:14:32,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=531, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=101, PETRI_PLACES=38, PETRI_TRANSITIONS=39} [2023-11-06 21:14:32,620 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -5 predicate places. [2023-11-06 21:14:32,621 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 39 transitions, 101 flow [2023-11-06 21:14:32,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 251.0) internal successors, (753), 3 states have internal predecessors, (753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:32,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:14:32,622 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:14:32,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 21:14:32,623 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 2 more)] === [2023-11-06 21:14:32,634 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:14:32,634 INFO L85 PathProgramCache]: Analyzing trace with hash -2105495576, now seen corresponding path program 1 times [2023-11-06 21:14:32,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:14:32,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822822674] [2023-11-06 21:14:32,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:14:32,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:14:32,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:14:32,833 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:14:32,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:14:32,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822822674] [2023-11-06 21:14:32,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822822674] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:14:32,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:14:32,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 21:14:32,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256564844] [2023-11-06 21:14:32,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:14:32,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:14:32,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:14:32,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:14:32,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:14:32,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 240 out of 531 [2023-11-06 21:14:32,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 39 transitions, 101 flow. Second operand has 3 states, 3 states have (on average 248.33333333333334) internal successors, (745), 3 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:32,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:14:32,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 240 of 531 [2023-11-06 21:14:32,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:14:33,292 INFO L124 PetriNetUnfolderBase]: 1710/2322 cut-off events. [2023-11-06 21:14:33,292 INFO L125 PetriNetUnfolderBase]: For 465/465 co-relation queries the response was YES. [2023-11-06 21:14:33,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5152 conditions, 2322 events. 1710/2322 cut-off events. For 465/465 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 9702 event pairs, 425 based on Foata normal form. 92/1887 useless extension candidates. Maximal degree in co-relation 1766. Up to 1509 conditions per place. [2023-11-06 21:14:33,313 INFO L140 encePairwiseOnDemand]: 528/531 looper letters, 54 selfloop transitions, 2 changer transitions 0/62 dead transitions. [2023-11-06 21:14:33,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 62 transitions, 273 flow [2023-11-06 21:14:33,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:14:33,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 21:14:33,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 774 transitions. [2023-11-06 21:14:33,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4858757062146893 [2023-11-06 21:14:33,318 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 774 transitions. [2023-11-06 21:14:33,319 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 774 transitions. [2023-11-06 21:14:33,319 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:14:33,320 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 774 transitions. [2023-11-06 21:14:33,322 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 258.0) internal successors, (774), 3 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:33,327 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 531.0) internal successors, (2124), 4 states have internal predecessors, (2124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:33,329 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 531.0) internal successors, (2124), 4 states have internal predecessors, (2124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:33,329 INFO L175 Difference]: Start difference. First operand has 38 places, 39 transitions, 101 flow. Second operand 3 states and 774 transitions. [2023-11-06 21:14:33,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 62 transitions, 273 flow [2023-11-06 21:14:33,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 62 transitions, 269 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 21:14:33,332 INFO L231 Difference]: Finished difference. Result has 40 places, 40 transitions, 112 flow [2023-11-06 21:14:33,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=531, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=40, PETRI_TRANSITIONS=40} [2023-11-06 21:14:33,334 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -3 predicate places. [2023-11-06 21:14:33,334 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 40 transitions, 112 flow [2023-11-06 21:14:33,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 248.33333333333334) internal successors, (745), 3 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:33,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:14:33,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:14:33,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 21:14:33,336 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 2 more)] === [2023-11-06 21:14:33,336 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:14:33,337 INFO L85 PathProgramCache]: Analyzing trace with hash 857612289, now seen corresponding path program 1 times [2023-11-06 21:14:33,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:14:33,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529497083] [2023-11-06 21:14:33,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:14:33,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:14:33,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:14:33,454 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:14:33,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:14:33,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529497083] [2023-11-06 21:14:33,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529497083] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:14:33,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:14:33,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 21:14:33,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357736758] [2023-11-06 21:14:33,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:14:33,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:14:33,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:14:33,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:14:33,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:14:33,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 240 out of 531 [2023-11-06 21:14:33,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 40 transitions, 112 flow. Second operand has 3 states, 3 states have (on average 248.33333333333334) internal successors, (745), 3 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:33,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:14:33,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 240 of 531 [2023-11-06 21:14:33,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:14:33,917 INFO L124 PetriNetUnfolderBase]: 1670/2398 cut-off events. [2023-11-06 21:14:33,917 INFO L125 PetriNetUnfolderBase]: For 1005/1005 co-relation queries the response was YES. [2023-11-06 21:14:33,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5581 conditions, 2398 events. 1670/2398 cut-off events. For 1005/1005 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 11084 event pairs, 475 based on Foata normal form. 66/2167 useless extension candidates. Maximal degree in co-relation 3727. Up to 1541 conditions per place. [2023-11-06 21:14:33,936 INFO L140 encePairwiseOnDemand]: 528/531 looper letters, 54 selfloop transitions, 2 changer transitions 0/62 dead transitions. [2023-11-06 21:14:33,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 62 transitions, 289 flow [2023-11-06 21:14:33,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:14:33,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 21:14:33,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 772 transitions. [2023-11-06 21:14:33,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48462021343377276 [2023-11-06 21:14:33,940 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 772 transitions. [2023-11-06 21:14:33,941 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 772 transitions. [2023-11-06 21:14:33,942 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:14:33,942 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 772 transitions. [2023-11-06 21:14:33,944 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 257.3333333333333) internal successors, (772), 3 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:33,949 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 531.0) internal successors, (2124), 4 states have internal predecessors, (2124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:33,951 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 531.0) internal successors, (2124), 4 states have internal predecessors, (2124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:33,951 INFO L175 Difference]: Start difference. First operand has 40 places, 40 transitions, 112 flow. Second operand 3 states and 772 transitions. [2023-11-06 21:14:33,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 62 transitions, 289 flow [2023-11-06 21:14:33,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 62 transitions, 286 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 21:14:33,957 INFO L231 Difference]: Finished difference. Result has 42 places, 41 transitions, 124 flow [2023-11-06 21:14:33,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=531, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=124, PETRI_PLACES=42, PETRI_TRANSITIONS=41} [2023-11-06 21:14:33,959 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -1 predicate places. [2023-11-06 21:14:33,962 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 41 transitions, 124 flow [2023-11-06 21:14:33,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 248.33333333333334) internal successors, (745), 3 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:33,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:14:33,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:14:33,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 21:14:33,964 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 2 more)] === [2023-11-06 21:14:33,965 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:14:33,965 INFO L85 PathProgramCache]: Analyzing trace with hash 470178181, now seen corresponding path program 1 times [2023-11-06 21:14:33,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:14:33,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806844893] [2023-11-06 21:14:33,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:14:33,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:14:34,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:14:34,272 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 21:14:34,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:14:34,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806844893] [2023-11-06 21:14:34,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806844893] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:14:34,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:14:34,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:14:34,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450296316] [2023-11-06 21:14:34,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:14:34,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:14:34,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:14:34,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:14:34,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:14:34,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 224 out of 531 [2023-11-06 21:14:34,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 41 transitions, 124 flow. Second operand has 4 states, 4 states have (on average 230.5) internal successors, (922), 4 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:34,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:14:34,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 224 of 531 [2023-11-06 21:14:34,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:14:34,937 INFO L124 PetriNetUnfolderBase]: 2089/3079 cut-off events. [2023-11-06 21:14:34,938 INFO L125 PetriNetUnfolderBase]: For 1721/1721 co-relation queries the response was YES. [2023-11-06 21:14:34,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7585 conditions, 3079 events. 2089/3079 cut-off events. For 1721/1721 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 15854 event pairs, 1506 based on Foata normal form. 73/3059 useless extension candidates. Maximal degree in co-relation 3714. Up to 2239 conditions per place. [2023-11-06 21:14:34,961 INFO L140 encePairwiseOnDemand]: 527/531 looper letters, 62 selfloop transitions, 3 changer transitions 0/71 dead transitions. [2023-11-06 21:14:34,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 71 transitions, 337 flow [2023-11-06 21:14:34,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 21:14:34,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 21:14:34,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 956 transitions. [2023-11-06 21:14:34,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4500941619585687 [2023-11-06 21:14:34,967 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 956 transitions. [2023-11-06 21:14:34,967 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 956 transitions. [2023-11-06 21:14:34,968 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:14:34,968 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 956 transitions. [2023-11-06 21:14:34,971 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 239.0) internal successors, (956), 4 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:34,977 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 531.0) internal successors, (2655), 5 states have internal predecessors, (2655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:34,979 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 531.0) internal successors, (2655), 5 states have internal predecessors, (2655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:34,979 INFO L175 Difference]: Start difference. First operand has 42 places, 41 transitions, 124 flow. Second operand 4 states and 956 transitions. [2023-11-06 21:14:34,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 71 transitions, 337 flow [2023-11-06 21:14:34,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 71 transitions, 334 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 21:14:34,983 INFO L231 Difference]: Finished difference. Result has 46 places, 43 transitions, 142 flow [2023-11-06 21:14:34,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=531, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=142, PETRI_PLACES=46, PETRI_TRANSITIONS=43} [2023-11-06 21:14:34,984 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2023-11-06 21:14:34,984 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 43 transitions, 142 flow [2023-11-06 21:14:34,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 230.5) internal successors, (922), 4 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:34,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:14:34,986 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:14:34,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 21:14:34,986 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 2 more)] === [2023-11-06 21:14:34,986 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:14:34,987 INFO L85 PathProgramCache]: Analyzing trace with hash 164707021, now seen corresponding path program 1 times [2023-11-06 21:14:34,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:14:34,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321315245] [2023-11-06 21:14:34,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:14:34,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:14:35,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:14:35,172 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 21:14:35,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:14:35,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321315245] [2023-11-06 21:14:35,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321315245] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:14:35,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:14:35,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 21:14:35,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534712930] [2023-11-06 21:14:35,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:14:35,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:14:35,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:14:35,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:14:35,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:14:35,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 224 out of 531 [2023-11-06 21:14:35,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 43 transitions, 142 flow. Second operand has 4 states, 4 states have (on average 230.5) internal successors, (922), 4 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:35,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:14:35,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 224 of 531 [2023-11-06 21:14:35,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:14:35,960 INFO L124 PetriNetUnfolderBase]: 2705/4105 cut-off events. [2023-11-06 21:14:35,960 INFO L125 PetriNetUnfolderBase]: For 2292/2292 co-relation queries the response was YES. [2023-11-06 21:14:35,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9834 conditions, 4105 events. 2705/4105 cut-off events. For 2292/2292 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 23336 event pairs, 2028 based on Foata normal form. 134/4123 useless extension candidates. Maximal degree in co-relation 7661. Up to 2950 conditions per place. [2023-11-06 21:14:35,990 INFO L140 encePairwiseOnDemand]: 525/531 looper letters, 61 selfloop transitions, 6 changer transitions 0/73 dead transitions. [2023-11-06 21:14:35,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 73 transitions, 360 flow [2023-11-06 21:14:35,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 21:14:35,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 21:14:35,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1180 transitions. [2023-11-06 21:14:35,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2023-11-06 21:14:35,996 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1180 transitions. [2023-11-06 21:14:35,996 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1180 transitions. [2023-11-06 21:14:35,997 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:14:35,997 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1180 transitions. [2023-11-06 21:14:36,001 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 236.0) internal successors, (1180), 5 states have internal predecessors, (1180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:36,007 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 531.0) internal successors, (3186), 6 states have internal predecessors, (3186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:36,010 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 531.0) internal successors, (3186), 6 states have internal predecessors, (3186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:36,010 INFO L175 Difference]: Start difference. First operand has 46 places, 43 transitions, 142 flow. Second operand 5 states and 1180 transitions. [2023-11-06 21:14:36,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 73 transitions, 360 flow [2023-11-06 21:14:36,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 73 transitions, 356 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-06 21:14:36,015 INFO L231 Difference]: Finished difference. Result has 52 places, 47 transitions, 177 flow [2023-11-06 21:14:36,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=531, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=177, PETRI_PLACES=52, PETRI_TRANSITIONS=47} [2023-11-06 21:14:36,020 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 9 predicate places. [2023-11-06 21:14:36,020 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 47 transitions, 177 flow [2023-11-06 21:14:36,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 230.5) internal successors, (922), 4 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:36,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:14:36,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:14:36,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 21:14:36,022 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 2 more)] === [2023-11-06 21:14:36,022 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:14:36,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1745048664, now seen corresponding path program 1 times [2023-11-06 21:14:36,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:14:36,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279645387] [2023-11-06 21:14:36,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:14:36,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:14:36,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:14:36,460 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 21:14:36,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:14:36,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279645387] [2023-11-06 21:14:36,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279645387] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:14:36,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:14:36,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 21:14:36,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311996498] [2023-11-06 21:14:36,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:14:36,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 21:14:36,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:14:36,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 21:14:36,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-06 21:14:36,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 531 [2023-11-06 21:14:36,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 47 transitions, 177 flow. Second operand has 6 states, 6 states have (on average 224.66666666666666) internal successors, (1348), 6 states have internal predecessors, (1348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:36,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:14:36,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 531 [2023-11-06 21:14:36,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:14:37,957 INFO L124 PetriNetUnfolderBase]: 4927/7490 cut-off events. [2023-11-06 21:14:37,957 INFO L125 PetriNetUnfolderBase]: For 3559/3565 co-relation queries the response was YES. [2023-11-06 21:14:37,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17754 conditions, 7490 events. 4927/7490 cut-off events. For 3559/3565 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 46717 event pairs, 1812 based on Foata normal form. 110/7486 useless extension candidates. Maximal degree in co-relation 11988. Up to 2551 conditions per place. [2023-11-06 21:14:38,013 INFO L140 encePairwiseOnDemand]: 525/531 looper letters, 97 selfloop transitions, 8 changer transitions 1/111 dead transitions. [2023-11-06 21:14:38,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 111 transitions, 585 flow [2023-11-06 21:14:38,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 21:14:38,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 21:14:38,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1412 transitions. [2023-11-06 21:14:38,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44318895166352795 [2023-11-06 21:14:38,021 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1412 transitions. [2023-11-06 21:14:38,021 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1412 transitions. [2023-11-06 21:14:38,023 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:14:38,023 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1412 transitions. [2023-11-06 21:14:38,028 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 235.33333333333334) internal successors, (1412), 6 states have internal predecessors, (1412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:38,035 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 531.0) internal successors, (3717), 7 states have internal predecessors, (3717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:38,037 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 531.0) internal successors, (3717), 7 states have internal predecessors, (3717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:38,037 INFO L175 Difference]: Start difference. First operand has 52 places, 47 transitions, 177 flow. Second operand 6 states and 1412 transitions. [2023-11-06 21:14:38,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 111 transitions, 585 flow [2023-11-06 21:14:38,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 111 transitions, 578 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-11-06 21:14:38,044 INFO L231 Difference]: Finished difference. Result has 58 places, 49 transitions, 203 flow [2023-11-06 21:14:38,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=531, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=203, PETRI_PLACES=58, PETRI_TRANSITIONS=49} [2023-11-06 21:14:38,048 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 15 predicate places. [2023-11-06 21:14:38,048 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 49 transitions, 203 flow [2023-11-06 21:14:38,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 224.66666666666666) internal successors, (1348), 6 states have internal predecessors, (1348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:38,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:14:38,050 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:14:38,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-06 21:14:38,050 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 2 more)] === [2023-11-06 21:14:38,051 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:14:38,051 INFO L85 PathProgramCache]: Analyzing trace with hash -355048292, now seen corresponding path program 1 times [2023-11-06 21:14:38,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:14:38,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904804111] [2023-11-06 21:14:38,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:14:38,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:14:38,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:14:38,436 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 21:14:38,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:14:38,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904804111] [2023-11-06 21:14:38,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904804111] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:14:38,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:14:38,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 21:14:38,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765977821] [2023-11-06 21:14:38,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:14:38,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 21:14:38,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:14:38,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 21:14:38,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-06 21:14:38,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 531 [2023-11-06 21:14:38,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 49 transitions, 203 flow. Second operand has 6 states, 6 states have (on average 224.66666666666666) internal successors, (1348), 6 states have internal predecessors, (1348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:38,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:14:38,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 531 [2023-11-06 21:14:38,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:14:39,763 INFO L124 PetriNetUnfolderBase]: 3821/5806 cut-off events. [2023-11-06 21:14:39,763 INFO L125 PetriNetUnfolderBase]: For 3240/3272 co-relation queries the response was YES. [2023-11-06 21:14:39,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13907 conditions, 5806 events. 3821/5806 cut-off events. For 3240/3272 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 34556 event pairs, 1920 based on Foata normal form. 88/5748 useless extension candidates. Maximal degree in co-relation 10561. Up to 2907 conditions per place. [2023-11-06 21:14:39,812 INFO L140 encePairwiseOnDemand]: 525/531 looper letters, 57 selfloop transitions, 6 changer transitions 32/100 dead transitions. [2023-11-06 21:14:39,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 100 transitions, 528 flow [2023-11-06 21:14:39,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 21:14:39,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 21:14:39,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1405 transitions. [2023-11-06 21:14:39,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44099183929692404 [2023-11-06 21:14:39,820 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1405 transitions. [2023-11-06 21:14:39,820 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1405 transitions. [2023-11-06 21:14:39,821 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:14:39,822 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1405 transitions. [2023-11-06 21:14:39,826 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 234.16666666666666) internal successors, (1405), 6 states have internal predecessors, (1405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:39,834 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 531.0) internal successors, (3717), 7 states have internal predecessors, (3717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:39,837 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 531.0) internal successors, (3717), 7 states have internal predecessors, (3717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:39,837 INFO L175 Difference]: Start difference. First operand has 58 places, 49 transitions, 203 flow. Second operand 6 states and 1405 transitions. [2023-11-06 21:14:39,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 100 transitions, 528 flow [2023-11-06 21:14:39,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 100 transitions, 516 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-11-06 21:14:39,844 INFO L231 Difference]: Finished difference. Result has 62 places, 47 transitions, 194 flow [2023-11-06 21:14:39,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=531, PETRI_DIFFERENCE_MINUEND_FLOW=193, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=194, PETRI_PLACES=62, PETRI_TRANSITIONS=47} [2023-11-06 21:14:39,845 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 19 predicate places. [2023-11-06 21:14:39,846 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 47 transitions, 194 flow [2023-11-06 21:14:39,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 224.66666666666666) internal successors, (1348), 6 states have internal predecessors, (1348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:39,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:14:39,847 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:14:39,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-06 21:14:39,847 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 2 more)] === [2023-11-06 21:14:39,848 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:14:39,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1989848344, now seen corresponding path program 1 times [2023-11-06 21:14:39,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:14:39,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577544505] [2023-11-06 21:14:39,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:14:39,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:14:39,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:14:40,338 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 21:14:40,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:14:40,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577544505] [2023-11-06 21:14:40,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577544505] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:14:40,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:14:40,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 21:14:40,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880497841] [2023-11-06 21:14:40,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:14:40,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 21:14:40,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:14:40,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 21:14:40,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-06 21:14:40,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 531 [2023-11-06 21:14:40,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 47 transitions, 194 flow. Second operand has 6 states, 6 states have (on average 224.83333333333334) internal successors, (1349), 6 states have internal predecessors, (1349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:40,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:14:40,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 531 [2023-11-06 21:14:40,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:14:41,200 INFO L124 PetriNetUnfolderBase]: 2659/3912 cut-off events. [2023-11-06 21:14:41,200 INFO L125 PetriNetUnfolderBase]: For 2584/2584 co-relation queries the response was YES. [2023-11-06 21:14:41,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10134 conditions, 3912 events. 2659/3912 cut-off events. For 2584/2584 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 21217 event pairs, 454 based on Foata normal form. 280/4142 useless extension candidates. Maximal degree in co-relation 7887. Up to 2040 conditions per place. [2023-11-06 21:14:41,233 INFO L140 encePairwiseOnDemand]: 525/531 looper letters, 63 selfloop transitions, 5 changer transitions 2/75 dead transitions. [2023-11-06 21:14:41,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 75 transitions, 424 flow [2023-11-06 21:14:41,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 21:14:41,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 21:14:41,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1379 transitions. [2023-11-06 21:14:41,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43283113622096675 [2023-11-06 21:14:41,240 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1379 transitions. [2023-11-06 21:14:41,240 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1379 transitions. [2023-11-06 21:14:41,241 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:14:41,242 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1379 transitions. [2023-11-06 21:14:41,245 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 229.83333333333334) internal successors, (1379), 6 states have internal predecessors, (1379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:41,253 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 531.0) internal successors, (3717), 7 states have internal predecessors, (3717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:41,255 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 531.0) internal successors, (3717), 7 states have internal predecessors, (3717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:41,255 INFO L175 Difference]: Start difference. First operand has 62 places, 47 transitions, 194 flow. Second operand 6 states and 1379 transitions. [2023-11-06 21:14:41,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 75 transitions, 424 flow [2023-11-06 21:14:41,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 75 transitions, 412 flow, removed 2 selfloop flow, removed 5 redundant places. [2023-11-06 21:14:41,263 INFO L231 Difference]: Finished difference. Result has 59 places, 45 transitions, 178 flow [2023-11-06 21:14:41,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=531, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=178, PETRI_PLACES=59, PETRI_TRANSITIONS=45} [2023-11-06 21:14:41,264 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 16 predicate places. [2023-11-06 21:14:41,264 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 45 transitions, 178 flow [2023-11-06 21:14:41,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 224.83333333333334) internal successors, (1349), 6 states have internal predecessors, (1349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:41,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:14:41,265 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:14:41,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-06 21:14:41,266 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 2 more)] === [2023-11-06 21:14:41,266 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:14:41,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1850005428, now seen corresponding path program 1 times [2023-11-06 21:14:41,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:14:41,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684054521] [2023-11-06 21:14:41,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:14:41,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:14:41,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:14:41,673 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 21:14:41,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:14:41,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684054521] [2023-11-06 21:14:41,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684054521] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:14:41,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:14:41,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 21:14:41,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428125988] [2023-11-06 21:14:41,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:14:41,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 21:14:41,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:14:41,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 21:14:41,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-06 21:14:41,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 531 [2023-11-06 21:14:41,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 45 transitions, 178 flow. Second operand has 6 states, 6 states have (on average 220.83333333333334) internal successors, (1325), 6 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:41,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:14:41,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 531 [2023-11-06 21:14:41,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:14:42,491 INFO L124 PetriNetUnfolderBase]: 2539/3536 cut-off events. [2023-11-06 21:14:42,492 INFO L125 PetriNetUnfolderBase]: For 3438/3638 co-relation queries the response was YES. [2023-11-06 21:14:42,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9887 conditions, 3536 events. 2539/3536 cut-off events. For 3438/3638 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 16126 event pairs, 474 based on Foata normal form. 440/3935 useless extension candidates. Maximal degree in co-relation 8291. Up to 1762 conditions per place. [2023-11-06 21:14:42,517 INFO L140 encePairwiseOnDemand]: 524/531 looper letters, 75 selfloop transitions, 7 changer transitions 11/97 dead transitions. [2023-11-06 21:14:42,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 97 transitions, 550 flow [2023-11-06 21:14:42,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 21:14:42,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 21:14:42,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1594 transitions. [2023-11-06 21:14:42,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4288404627387678 [2023-11-06 21:14:42,524 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1594 transitions. [2023-11-06 21:14:42,524 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1594 transitions. [2023-11-06 21:14:42,526 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:14:42,526 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1594 transitions. [2023-11-06 21:14:42,531 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 227.71428571428572) internal successors, (1594), 7 states have internal predecessors, (1594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:42,538 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 531.0) internal successors, (4248), 8 states have internal predecessors, (4248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:42,540 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 531.0) internal successors, (4248), 8 states have internal predecessors, (4248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:42,540 INFO L175 Difference]: Start difference. First operand has 59 places, 45 transitions, 178 flow. Second operand 7 states and 1594 transitions. [2023-11-06 21:14:42,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 97 transitions, 550 flow [2023-11-06 21:14:42,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 97 transitions, 514 flow, removed 9 selfloop flow, removed 7 redundant places. [2023-11-06 21:14:42,545 INFO L231 Difference]: Finished difference. Result has 59 places, 47 transitions, 191 flow [2023-11-06 21:14:42,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=531, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=191, PETRI_PLACES=59, PETRI_TRANSITIONS=47} [2023-11-06 21:14:42,546 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 16 predicate places. [2023-11-06 21:14:42,546 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 47 transitions, 191 flow [2023-11-06 21:14:42,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 220.83333333333334) internal successors, (1325), 6 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:42,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:14:42,548 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:14:42,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-06 21:14:42,548 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 2 more)] === [2023-11-06 21:14:42,549 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:14:42,549 INFO L85 PathProgramCache]: Analyzing trace with hash 963202267, now seen corresponding path program 1 times [2023-11-06 21:14:42,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:14:42,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298365436] [2023-11-06 21:14:42,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:14:42,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:14:42,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:14:42,886 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-06 21:14:42,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:14:42,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298365436] [2023-11-06 21:14:42,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298365436] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:14:42,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048107870] [2023-11-06 21:14:42,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:14:42,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:14:42,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220c8820-a846-492a-85f0-cbdb48594fa3/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:14:42,895 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220c8820-a846-492a-85f0-cbdb48594fa3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:14:42,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220c8820-a846-492a-85f0-cbdb48594fa3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 21:14:43,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:14:43,080 INFO L262 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 21:14:43,087 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:14:43,156 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-06 21:14:43,156 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:14:43,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048107870] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:14:43,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 21:14:43,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-11-06 21:14:43,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632608295] [2023-11-06 21:14:43,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:14:43,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 21:14:43,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:14:43,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 21:14:43,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-06 21:14:43,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 531 [2023-11-06 21:14:43,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 47 transitions, 191 flow. Second operand has 5 states, 5 states have (on average 243.2) internal successors, (1216), 5 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) [2023-11-06 21:14:43,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:14:43,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 531 [2023-11-06 21:14:43,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:14:44,172 INFO L124 PetriNetUnfolderBase]: 4068/5392 cut-off events. [2023-11-06 21:14:44,173 INFO L125 PetriNetUnfolderBase]: For 6369/6903 co-relation queries the response was YES. [2023-11-06 21:14:44,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16217 conditions, 5392 events. 4068/5392 cut-off events. For 6369/6903 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 23599 event pairs, 497 based on Foata normal form. 512/5884 useless extension candidates. Maximal degree in co-relation 16188. Up to 2189 conditions per place. [2023-11-06 21:14:44,222 INFO L140 encePairwiseOnDemand]: 525/531 looper letters, 91 selfloop transitions, 11 changer transitions 0/108 dead transitions. [2023-11-06 21:14:44,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 108 transitions, 638 flow [2023-11-06 21:14:44,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 21:14:44,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 21:14:44,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1508 transitions. [2023-11-06 21:14:44,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47332077840552417 [2023-11-06 21:14:44,230 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1508 transitions. [2023-11-06 21:14:44,230 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1508 transitions. [2023-11-06 21:14:44,231 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:14:44,232 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1508 transitions. [2023-11-06 21:14:44,237 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 251.33333333333334) internal successors, (1508), 6 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:44,245 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 531.0) internal successors, (3717), 7 states have internal predecessors, (3717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:44,247 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 531.0) internal successors, (3717), 7 states have internal predecessors, (3717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:44,247 INFO L175 Difference]: Start difference. First operand has 59 places, 47 transitions, 191 flow. Second operand 6 states and 1508 transitions. [2023-11-06 21:14:44,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 108 transitions, 638 flow [2023-11-06 21:14:44,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 108 transitions, 601 flow, removed 8 selfloop flow, removed 5 redundant places. [2023-11-06 21:14:44,255 INFO L231 Difference]: Finished difference. Result has 62 places, 55 transitions, 264 flow [2023-11-06 21:14:44,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=531, PETRI_DIFFERENCE_MINUEND_FLOW=175, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=264, PETRI_PLACES=62, PETRI_TRANSITIONS=55} [2023-11-06 21:14:44,256 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 19 predicate places. [2023-11-06 21:14:44,256 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 55 transitions, 264 flow [2023-11-06 21:14:44,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 243.2) internal successors, (1216), 5 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) [2023-11-06 21:14:44,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:14:44,257 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:14:44,278 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220c8820-a846-492a-85f0-cbdb48594fa3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 21:14:44,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220c8820-a846-492a-85f0-cbdb48594fa3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 21:14:44,473 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 2 more)] === [2023-11-06 21:14:44,474 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:14:44,474 INFO L85 PathProgramCache]: Analyzing trace with hash -937636503, now seen corresponding path program 2 times [2023-11-06 21:14:44,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:14:44,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041476877] [2023-11-06 21:14:44,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:14:44,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:14:44,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:14:45,015 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-06 21:14:45,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:14:45,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041476877] [2023-11-06 21:14:45,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041476877] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:14:45,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:14:45,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 21:14:45,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869405507] [2023-11-06 21:14:45,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:14:45,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 21:14:45,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:14:45,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 21:14:45,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-06 21:14:45,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 531 [2023-11-06 21:14:45,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 55 transitions, 264 flow. Second operand has 6 states, 6 states have (on average 221.16666666666666) internal successors, (1327), 6 states have internal predecessors, (1327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:45,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:14:45,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 531 [2023-11-06 21:14:45,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:14:46,323 INFO L124 PetriNetUnfolderBase]: 4474/5909 cut-off events. [2023-11-06 21:14:46,323 INFO L125 PetriNetUnfolderBase]: For 9853/10389 co-relation queries the response was YES. [2023-11-06 21:14:46,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21103 conditions, 5909 events. 4474/5909 cut-off events. For 9853/10389 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 25480 event pairs, 495 based on Foata normal form. 478/6375 useless extension candidates. Maximal degree in co-relation 21072. Up to 4497 conditions per place. [2023-11-06 21:14:46,375 INFO L140 encePairwiseOnDemand]: 524/531 looper letters, 86 selfloop transitions, 8 changer transitions 0/100 dead transitions. [2023-11-06 21:14:46,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 100 transitions, 650 flow [2023-11-06 21:14:46,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 21:14:46,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 21:14:46,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1584 transitions. [2023-11-06 21:14:46,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4261501210653753 [2023-11-06 21:14:46,382 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1584 transitions. [2023-11-06 21:14:46,382 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1584 transitions. [2023-11-06 21:14:46,384 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:14:46,384 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1584 transitions. [2023-11-06 21:14:46,388 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 226.28571428571428) internal successors, (1584), 7 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:46,394 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 531.0) internal successors, (4248), 8 states have internal predecessors, (4248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:46,396 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 531.0) internal successors, (4248), 8 states have internal predecessors, (4248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:46,396 INFO L175 Difference]: Start difference. First operand has 62 places, 55 transitions, 264 flow. Second operand 7 states and 1584 transitions. [2023-11-06 21:14:46,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 100 transitions, 650 flow [2023-11-06 21:14:46,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 100 transitions, 645 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-11-06 21:14:46,408 INFO L231 Difference]: Finished difference. Result has 69 places, 58 transitions, 307 flow [2023-11-06 21:14:46,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=531, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=307, PETRI_PLACES=69, PETRI_TRANSITIONS=58} [2023-11-06 21:14:46,408 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 26 predicate places. [2023-11-06 21:14:46,409 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 58 transitions, 307 flow [2023-11-06 21:14:46,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 221.16666666666666) internal successors, (1327), 6 states have internal predecessors, (1327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:46,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:14:46,410 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:14:46,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-06 21:14:46,410 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 2 more)] === [2023-11-06 21:14:46,410 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:14:46,410 INFO L85 PathProgramCache]: Analyzing trace with hash 646844968, now seen corresponding path program 1 times [2023-11-06 21:14:46,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:14:46,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690782482] [2023-11-06 21:14:46,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:14:46,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:14:46,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:14:46,687 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-06 21:14:46,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:14:46,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690782482] [2023-11-06 21:14:46,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690782482] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:14:46,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142952824] [2023-11-06 21:14:46,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:14:46,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:14:46,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220c8820-a846-492a-85f0-cbdb48594fa3/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:14:46,692 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220c8820-a846-492a-85f0-cbdb48594fa3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:14:46,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220c8820-a846-492a-85f0-cbdb48594fa3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 21:14:46,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:14:46,876 INFO L262 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 21:14:46,881 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:14:46,932 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-06 21:14:46,933 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:14:46,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142952824] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:14:46,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 21:14:46,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-11-06 21:14:46,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556968447] [2023-11-06 21:14:46,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:14:46,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 21:14:46,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:14:46,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 21:14:46,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-06 21:14:46,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 531 [2023-11-06 21:14:46,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 58 transitions, 307 flow. Second operand has 5 states, 5 states have (on average 243.2) internal successors, (1216), 5 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) [2023-11-06 21:14:46,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:14:46,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 531 [2023-11-06 21:14:46,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:14:48,956 INFO L124 PetriNetUnfolderBase]: 8438/11454 cut-off events. [2023-11-06 21:14:48,957 INFO L125 PetriNetUnfolderBase]: For 32608/33640 co-relation queries the response was YES. [2023-11-06 21:14:49,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41934 conditions, 11454 events. 8438/11454 cut-off events. For 32608/33640 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 57273 event pairs, 1823 based on Foata normal form. 938/12242 useless extension candidates. Maximal degree in co-relation 41900. Up to 4397 conditions per place. [2023-11-06 21:14:49,078 INFO L140 encePairwiseOnDemand]: 525/531 looper letters, 113 selfloop transitions, 13 changer transitions 0/135 dead transitions. [2023-11-06 21:14:49,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 135 transitions, 974 flow [2023-11-06 21:14:49,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 21:14:49,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 21:14:49,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1510 transitions. [2023-11-06 21:14:49,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47394852479598243 [2023-11-06 21:14:49,085 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1510 transitions. [2023-11-06 21:14:49,085 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1510 transitions. [2023-11-06 21:14:49,086 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:14:49,086 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1510 transitions. [2023-11-06 21:14:49,090 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 251.66666666666666) internal successors, (1510), 6 states have internal predecessors, (1510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:49,096 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 531.0) internal successors, (3717), 7 states have internal predecessors, (3717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:49,097 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 531.0) internal successors, (3717), 7 states have internal predecessors, (3717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:49,097 INFO L175 Difference]: Start difference. First operand has 69 places, 58 transitions, 307 flow. Second operand 6 states and 1510 transitions. [2023-11-06 21:14:49,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 135 transitions, 974 flow [2023-11-06 21:14:49,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 135 transitions, 961 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-11-06 21:14:49,126 INFO L231 Difference]: Finished difference. Result has 75 places, 66 transitions, 400 flow [2023-11-06 21:14:49,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=531, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=400, PETRI_PLACES=75, PETRI_TRANSITIONS=66} [2023-11-06 21:14:49,128 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 32 predicate places. [2023-11-06 21:14:49,128 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 66 transitions, 400 flow [2023-11-06 21:14:49,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 243.2) internal successors, (1216), 5 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) [2023-11-06 21:14:49,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:14:49,129 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:14:49,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220c8820-a846-492a-85f0-cbdb48594fa3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 21:14:49,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220c8820-a846-492a-85f0-cbdb48594fa3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-06 21:14:49,335 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-06 21:14:49,335 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:14:49,336 INFO L85 PathProgramCache]: Analyzing trace with hash -971445265, now seen corresponding path program 1 times [2023-11-06 21:14:49,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:14:49,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045000161] [2023-11-06 21:14:49,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:14:49,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:14:49,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:14:53,873 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 21:14:53,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:14:53,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045000161] [2023-11-06 21:14:53,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045000161] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:14:53,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56006994] [2023-11-06 21:14:53,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:14:53,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:14:53,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220c8820-a846-492a-85f0-cbdb48594fa3/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:14:53,875 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220c8820-a846-492a-85f0-cbdb48594fa3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:14:53,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220c8820-a846-492a-85f0-cbdb48594fa3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 21:14:54,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:14:54,077 INFO L262 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 52 conjunts are in the unsatisfiable core [2023-11-06 21:14:54,081 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:14:55,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:14:55,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:14:55,117 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-06 21:14:55,118 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2023-11-06 21:14:55,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:14:55,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:14:55,306 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-06 21:14:55,306 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2023-11-06 21:14:55,676 INFO L322 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2023-11-06 21:14:55,676 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 46 [2023-11-06 21:14:55,702 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 21:14:55,702 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:14:56,446 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:14:56,447 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 898 treesize of output 1006 [2023-11-06 21:14:56,590 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:14:56,591 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 748 treesize of output 644 [2023-11-06 21:14:56,710 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:14:56,710 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 556 treesize of output 548