./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-commit-1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff 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_00e14c5a-88cb-439d-a13d-2281d40a417c/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00e14c5a-88cb-439d-a13d-2281d40a417c/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00e14c5a-88cb-439d-a13d-2281d40a417c/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00e14c5a-88cb-439d-a13d-2281d40a417c/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-commit-1.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00e14c5a-88cb-439d-a13d-2281d40a417c/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00e14c5a-88cb-439d-a13d-2281d40a417c/bin/uautomizer-verify-uCwYo4JHxu --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 73c55a951ef2b92a665c2c32d76e33a5a03bdbde67ee3c8e6748faf493088c7e --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:50:43,832 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:50:43,962 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00e14c5a-88cb-439d-a13d-2281d40a417c/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:50:43,969 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:50:43,969 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:50:44,008 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:50:44,010 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:50:44,010 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:50:44,011 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:50:44,017 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:50:44,018 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:50:44,019 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:50:44,019 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:50:44,021 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:50:44,021 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:50:44,022 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:50:44,022 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:50:44,023 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:50:44,023 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:50:44,023 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:50:44,024 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:50:44,024 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:50:44,025 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:50:44,025 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:50:44,026 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:50:44,027 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:50:44,027 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:50:44,027 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:50:44,028 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:50:44,028 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:50:44,030 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:50:44,030 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:50:44,030 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:50:44,030 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:50:44,031 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:50:44,031 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:50:44,031 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:50:44,031 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:50:44,032 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:50:44,032 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_00e14c5a-88cb-439d-a13d-2281d40a417c/bin/uautomizer-verify-uCwYo4JHxu/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00e14c5a-88cb-439d-a13d-2281d40a417c/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 73c55a951ef2b92a665c2c32d76e33a5a03bdbde67ee3c8e6748faf493088c7e [2023-11-19 07:50:44,360 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:50:44,396 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:50:44,400 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:50:44,402 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:50:44,402 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:50:44,404 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00e14c5a-88cb-439d-a13d-2281d40a417c/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/weaver/popl20-commit-1.wvr.c [2023-11-19 07:50:47,472 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:50:47,744 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:50:47,744 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00e14c5a-88cb-439d-a13d-2281d40a417c/sv-benchmarks/c/weaver/popl20-commit-1.wvr.c [2023-11-19 07:50:47,754 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00e14c5a-88cb-439d-a13d-2281d40a417c/bin/uautomizer-verify-uCwYo4JHxu/data/7efc8426a/a0d48ccb4d7d4d3393ca2dfb3d8209df/FLAGcf41659b6 [2023-11-19 07:50:48,096 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00e14c5a-88cb-439d-a13d-2281d40a417c/bin/uautomizer-verify-uCwYo4JHxu/data/7efc8426a/a0d48ccb4d7d4d3393ca2dfb3d8209df [2023-11-19 07:50:48,098 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:50:48,099 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:50:48,101 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:50:48,101 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:50:48,110 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:50:48,111 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:50:48" (1/1) ... [2023-11-19 07:50:48,112 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47ba8d5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:48, skipping insertion in model container [2023-11-19 07:50:48,113 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:50:48" (1/1) ... [2023-11-19 07:50:48,145 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:50:48,345 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_00e14c5a-88cb-439d-a13d-2281d40a417c/sv-benchmarks/c/weaver/popl20-commit-1.wvr.c[4643,4656] [2023-11-19 07:50:48,361 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:50:48,371 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:50:48,403 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_00e14c5a-88cb-439d-a13d-2281d40a417c/sv-benchmarks/c/weaver/popl20-commit-1.wvr.c[4643,4656] [2023-11-19 07:50:48,407 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:50:48,417 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:50:48,417 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:50:48,425 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:50:48,426 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:48 WrapperNode [2023-11-19 07:50:48,426 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:50:48,427 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:50:48,427 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:50:48,428 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:50:48,435 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:48" (1/1) ... [2023-11-19 07:50:48,445 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:48" (1/1) ... [2023-11-19 07:50:48,497 INFO L138 Inliner]: procedures = 25, calls = 68, calls flagged for inlining = 20, calls inlined = 24, statements flattened = 352 [2023-11-19 07:50:48,509 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:50:48,510 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:50:48,510 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:50:48,510 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:50:48,520 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:48" (1/1) ... [2023-11-19 07:50:48,522 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:48" (1/1) ... [2023-11-19 07:50:48,526 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:48" (1/1) ... [2023-11-19 07:50:48,527 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:48" (1/1) ... [2023-11-19 07:50:48,540 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:48" (1/1) ... [2023-11-19 07:50:48,546 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:48" (1/1) ... [2023-11-19 07:50:48,549 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:48" (1/1) ... [2023-11-19 07:50:48,552 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:48" (1/1) ... [2023-11-19 07:50:48,557 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:50:48,558 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:50:48,559 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:50:48,559 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:50:48,560 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:48" (1/1) ... [2023-11-19 07:50:48,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:50:48,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00e14c5a-88cb-439d-a13d-2281d40a417c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:48,597 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00e14c5a-88cb-439d-a13d-2281d40a417c/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:50:48,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00e14c5a-88cb-439d-a13d-2281d40a417c/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:50:48,636 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:50:48,637 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:50:48,637 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:50:48,637 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:50:48,638 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-19 07:50:48,638 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-19 07:50:48,638 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-19 07:50:48,639 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-19 07:50:48,639 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-19 07:50:48,639 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-19 07:50:48,639 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:50:48,641 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-19 07:50:48,642 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-19 07:50:48,642 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 07:50:48,642 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:50:48,643 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:50:48,643 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:50:48,645 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-19 07:50:48,779 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:50:48,781 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:50:49,421 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:50:49,692 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:50:49,692 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-19 07:50:49,698 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:50:49 BoogieIcfgContainer [2023-11-19 07:50:49,698 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:50:49,700 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:50:49,701 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:50:49,704 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:50:49,704 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:50:48" (1/3) ... [2023-11-19 07:50:49,705 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@866fa70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:50:49, skipping insertion in model container [2023-11-19 07:50:49,706 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:48" (2/3) ... [2023-11-19 07:50:49,706 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@866fa70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:50:49, skipping insertion in model container [2023-11-19 07:50:49,706 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:50:49" (3/3) ... [2023-11-19 07:50:49,707 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-commit-1.wvr.c [2023-11-19 07:50:49,718 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-19 07:50:49,729 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:50:49,729 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:50:49,730 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:50:49,860 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-19 07:50:49,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 261 places, 270 transitions, 561 flow [2023-11-19 07:50:50,078 INFO L124 PetriNetUnfolderBase]: 19/267 cut-off events. [2023-11-19 07:50:50,078 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-19 07:50:50,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 280 conditions, 267 events. 19/267 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 153 event pairs, 0 based on Foata normal form. 0/247 useless extension candidates. Maximal degree in co-relation 228. Up to 2 conditions per place. [2023-11-19 07:50:50,086 INFO L82 GeneralOperation]: Start removeDead. Operand has 261 places, 270 transitions, 561 flow [2023-11-19 07:50:50,094 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 247 places, 256 transitions, 530 flow [2023-11-19 07:50:50,098 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:50:50,108 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 247 places, 256 transitions, 530 flow [2023-11-19 07:50:50,111 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 247 places, 256 transitions, 530 flow [2023-11-19 07:50:50,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 247 places, 256 transitions, 530 flow [2023-11-19 07:50:50,195 INFO L124 PetriNetUnfolderBase]: 19/256 cut-off events. [2023-11-19 07:50:50,195 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-19 07:50:50,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 269 conditions, 256 events. 19/256 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 151 event pairs, 0 based on Foata normal form. 0/237 useless extension candidates. Maximal degree in co-relation 228. Up to 2 conditions per place. [2023-11-19 07:50:50,199 INFO L119 LiptonReduction]: Number of co-enabled transitions 1666 [2023-11-19 07:51:01,024 INFO L134 LiptonReduction]: Checked pairs total: 3062 [2023-11-19 07:51:01,025 INFO L136 LiptonReduction]: Total number of compositions: 268 [2023-11-19 07:51:01,046 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:51:01,052 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@60c5d70f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:51:01,052 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-19 07:51:01,060 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:51:01,061 INFO L124 PetriNetUnfolderBase]: 6/32 cut-off events. [2023-11-19 07:51:01,061 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-19 07:51:01,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:51:01,062 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:51:01,063 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 07:51:01,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:51:01,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1127845411, now seen corresponding path program 1 times [2023-11-19 07:51:01,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:51:01,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072998289] [2023-11-19 07:51:01,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:51:01,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:51:01,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:51:01,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:51:01,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:51:01,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072998289] [2023-11-19 07:51:01,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072998289] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:51:01,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:51:01,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:51:01,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695773008] [2023-11-19 07:51:01,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:51:01,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:51:01,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:51:01,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:51:01,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:51:01,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 240 out of 538 [2023-11-19 07:51:01,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 33 transitions, 84 flow. Second operand has 3 states, 3 states have (on average 246.33333333333334) internal successors, (739), 3 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:01,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:51:01,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 240 of 538 [2023-11-19 07:51:01,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:51:02,120 INFO L124 PetriNetUnfolderBase]: 919/1273 cut-off events. [2023-11-19 07:51:02,121 INFO L125 PetriNetUnfolderBase]: For 91/91 co-relation queries the response was YES. [2023-11-19 07:51:02,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2645 conditions, 1273 events. 919/1273 cut-off events. For 91/91 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 5058 event pairs, 151 based on Foata normal form. 1/892 useless extension candidates. Maximal degree in co-relation 2229. Up to 1148 conditions per place. [2023-11-19 07:51:02,134 INFO L140 encePairwiseOnDemand]: 533/538 looper letters, 42 selfloop transitions, 4 changer transitions 1/50 dead transitions. [2023-11-19 07:51:02,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 50 transitions, 227 flow [2023-11-19 07:51:02,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:51:02,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:51:02,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 768 transitions. [2023-11-19 07:51:02,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4758364312267658 [2023-11-19 07:51:02,163 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 768 transitions. [2023-11-19 07:51:02,164 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 768 transitions. [2023-11-19 07:51:02,167 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:51:02,174 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 768 transitions. [2023-11-19 07:51:02,180 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 256.0) internal successors, (768), 3 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:02,188 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 538.0) internal successors, (2152), 4 states have internal predecessors, (2152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:02,190 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 538.0) internal successors, (2152), 4 states have internal predecessors, (2152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:02,192 INFO L175 Difference]: Start difference. First operand has 37 places, 33 transitions, 84 flow. Second operand 3 states and 768 transitions. [2023-11-19 07:51:02,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 50 transitions, 227 flow [2023-11-19 07:51:02,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 50 transitions, 205 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-19 07:51:02,200 INFO L231 Difference]: Finished difference. Result has 34 places, 36 transitions, 98 flow [2023-11-19 07:51:02,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=538, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=34, PETRI_TRANSITIONS=36} [2023-11-19 07:51:02,206 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, -3 predicate places. [2023-11-19 07:51:02,207 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 36 transitions, 98 flow [2023-11-19 07:51:02,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 246.33333333333334) internal successors, (739), 3 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:02,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:51:02,208 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:51:02,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:51:02,209 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 07:51:02,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:51:02,210 INFO L85 PathProgramCache]: Analyzing trace with hash 133898429, now seen corresponding path program 1 times [2023-11-19 07:51:02,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:51:02,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300038400] [2023-11-19 07:51:02,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:51:02,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:51:02,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:51:02,345 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:51:02,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:51:02,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300038400] [2023-11-19 07:51:02,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300038400] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:51:02,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:51:02,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:51:02,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775662887] [2023-11-19 07:51:02,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:51:02,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:51:02,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:51:02,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:51:02,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:51:02,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 538 [2023-11-19 07:51:02,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 36 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 245.0) internal successors, (735), 3 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:02,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:51:02,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 538 [2023-11-19 07:51:02,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:51:02,680 INFO L124 PetriNetUnfolderBase]: 871/1256 cut-off events. [2023-11-19 07:51:02,680 INFO L125 PetriNetUnfolderBase]: For 197/197 co-relation queries the response was YES. [2023-11-19 07:51:02,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2846 conditions, 1256 events. 871/1256 cut-off events. For 197/197 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 5191 event pairs, 260 based on Foata normal form. 49/1166 useless extension candidates. Maximal degree in co-relation 2202. Up to 943 conditions per place. [2023-11-19 07:51:02,691 INFO L140 encePairwiseOnDemand]: 535/538 looper letters, 48 selfloop transitions, 2 changer transitions 0/53 dead transitions. [2023-11-19 07:51:02,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 53 transitions, 240 flow [2023-11-19 07:51:02,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:51:02,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:51:02,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 763 transitions. [2023-11-19 07:51:02,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47273853779429986 [2023-11-19 07:51:02,695 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 763 transitions. [2023-11-19 07:51:02,696 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 763 transitions. [2023-11-19 07:51:02,699 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:51:02,700 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 763 transitions. [2023-11-19 07:51:02,703 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 254.33333333333334) internal successors, (763), 3 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:02,707 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 538.0) internal successors, (2152), 4 states have internal predecessors, (2152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:02,709 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 538.0) internal successors, (2152), 4 states have internal predecessors, (2152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:02,709 INFO L175 Difference]: Start difference. First operand has 34 places, 36 transitions, 98 flow. Second operand 3 states and 763 transitions. [2023-11-19 07:51:02,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 53 transitions, 240 flow [2023-11-19 07:51:02,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 53 transitions, 237 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:51:02,714 INFO L231 Difference]: Finished difference. Result has 36 places, 36 transitions, 102 flow [2023-11-19 07:51:02,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=538, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=36, PETRI_TRANSITIONS=36} [2023-11-19 07:51:02,721 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, -1 predicate places. [2023-11-19 07:51:02,721 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 36 transitions, 102 flow [2023-11-19 07:51:02,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 245.0) internal successors, (735), 3 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:02,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:51:02,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:51:02,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:51:02,723 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 07:51:02,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:51:02,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1030875441, now seen corresponding path program 1 times [2023-11-19 07:51:02,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:51:02,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606933802] [2023-11-19 07:51:02,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:51:02,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:51:02,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:51:02,894 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:51:02,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:51:02,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606933802] [2023-11-19 07:51:02,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606933802] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:51:02,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:51:02,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:51:02,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119450415] [2023-11-19 07:51:02,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:51:02,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:51:02,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:51:02,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:51:02,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:51:02,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 538 [2023-11-19 07:51:02,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 36 transitions, 102 flow. Second operand has 3 states, 3 states have (on average 245.0) internal successors, (735), 3 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:02,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:51:02,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 538 [2023-11-19 07:51:02,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:51:03,207 INFO L124 PetriNetUnfolderBase]: 932/1341 cut-off events. [2023-11-19 07:51:03,207 INFO L125 PetriNetUnfolderBase]: For 415/415 co-relation queries the response was YES. [2023-11-19 07:51:03,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3207 conditions, 1341 events. 932/1341 cut-off events. For 415/415 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 5566 event pairs, 235 based on Foata normal form. 34/1234 useless extension candidates. Maximal degree in co-relation 2059. Up to 957 conditions per place. [2023-11-19 07:51:03,218 INFO L140 encePairwiseOnDemand]: 535/538 looper letters, 42 selfloop transitions, 2 changer transitions 6/53 dead transitions. [2023-11-19 07:51:03,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 53 transitions, 243 flow [2023-11-19 07:51:03,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:51:03,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:51:03,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 765 transitions. [2023-11-19 07:51:03,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4739776951672863 [2023-11-19 07:51:03,223 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 765 transitions. [2023-11-19 07:51:03,223 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 765 transitions. [2023-11-19 07:51:03,224 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:51:03,224 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 765 transitions. [2023-11-19 07:51:03,226 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 255.0) internal successors, (765), 3 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:03,231 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 538.0) internal successors, (2152), 4 states have internal predecessors, (2152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:03,233 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 538.0) internal successors, (2152), 4 states have internal predecessors, (2152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:03,233 INFO L175 Difference]: Start difference. First operand has 36 places, 36 transitions, 102 flow. Second operand 3 states and 765 transitions. [2023-11-19 07:51:03,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 53 transitions, 243 flow [2023-11-19 07:51:03,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 53 transitions, 241 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:51:03,236 INFO L231 Difference]: Finished difference. Result has 38 places, 36 transitions, 108 flow [2023-11-19 07:51:03,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=538, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=38, PETRI_TRANSITIONS=36} [2023-11-19 07:51:03,237 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 1 predicate places. [2023-11-19 07:51:03,238 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 36 transitions, 108 flow [2023-11-19 07:51:03,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 245.0) internal successors, (735), 3 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:03,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:51:03,239 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] [2023-11-19 07:51:03,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 07:51:03,240 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 07:51:03,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:51:03,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1773185919, now seen corresponding path program 1 times [2023-11-19 07:51:03,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:51:03,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473252900] [2023-11-19 07:51:03,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:51:03,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:51:03,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:51:03,340 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:51:03,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:51:03,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473252900] [2023-11-19 07:51:03,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473252900] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:51:03,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:51:03,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:51:03,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054089938] [2023-11-19 07:51:03,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:51:03,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:51:03,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:51:03,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:51:03,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:51:03,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 538 [2023-11-19 07:51:03,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 36 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 245.66666666666666) internal successors, (737), 3 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:03,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:51:03,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 538 [2023-11-19 07:51:03,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:51:03,539 INFO L124 PetriNetUnfolderBase]: 486/724 cut-off events. [2023-11-19 07:51:03,539 INFO L125 PetriNetUnfolderBase]: For 328/328 co-relation queries the response was YES. [2023-11-19 07:51:03,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1814 conditions, 724 events. 486/724 cut-off events. For 328/328 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2547 event pairs, 197 based on Foata normal form. 13/669 useless extension candidates. Maximal degree in co-relation 520. Up to 633 conditions per place. [2023-11-19 07:51:03,546 INFO L140 encePairwiseOnDemand]: 535/538 looper letters, 34 selfloop transitions, 2 changer transitions 7/46 dead transitions. [2023-11-19 07:51:03,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 46 transitions, 217 flow [2023-11-19 07:51:03,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:51:03,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:51:03,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 755 transitions. [2023-11-19 07:51:03,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4677819083023544 [2023-11-19 07:51:03,551 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 755 transitions. [2023-11-19 07:51:03,551 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 755 transitions. [2023-11-19 07:51:03,552 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:51:03,552 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 755 transitions. [2023-11-19 07:51:03,555 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 251.66666666666666) internal successors, (755), 3 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:03,560 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 538.0) internal successors, (2152), 4 states have internal predecessors, (2152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:03,562 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 538.0) internal successors, (2152), 4 states have internal predecessors, (2152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:03,562 INFO L175 Difference]: Start difference. First operand has 38 places, 36 transitions, 108 flow. Second operand 3 states and 755 transitions. [2023-11-19 07:51:03,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 46 transitions, 217 flow [2023-11-19 07:51:03,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 46 transitions, 215 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:51:03,566 INFO L231 Difference]: Finished difference. Result has 40 places, 37 transitions, 118 flow [2023-11-19 07:51:03,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=538, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=40, PETRI_TRANSITIONS=37} [2023-11-19 07:51:03,567 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 3 predicate places. [2023-11-19 07:51:03,567 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 37 transitions, 118 flow [2023-11-19 07:51:03,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 245.66666666666666) internal successors, (737), 3 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:03,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:51:03,569 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] [2023-11-19 07:51:03,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 07:51:03,569 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 07:51:03,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:51:03,570 INFO L85 PathProgramCache]: Analyzing trace with hash -511025785, now seen corresponding path program 1 times [2023-11-19 07:51:03,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:51:03,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31704517] [2023-11-19 07:51:03,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:51:03,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:51:03,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:51:03,794 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:51:03,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:51:03,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31704517] [2023-11-19 07:51:03,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31704517] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:51:03,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:51:03,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:51:03,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33497118] [2023-11-19 07:51:03,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:51:03,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:51:03,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:51:03,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:51:03,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:51:03,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 538 [2023-11-19 07:51:03,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 37 transitions, 118 flow. Second operand has 4 states, 4 states have (on average 228.25) internal successors, (913), 4 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:03,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:51:03,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 538 [2023-11-19 07:51:03,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:51:04,121 INFO L124 PetriNetUnfolderBase]: 525/815 cut-off events. [2023-11-19 07:51:04,121 INFO L125 PetriNetUnfolderBase]: For 352/352 co-relation queries the response was YES. [2023-11-19 07:51:04,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2072 conditions, 815 events. 525/815 cut-off events. For 352/352 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 3189 event pairs, 366 based on Foata normal form. 14/822 useless extension candidates. Maximal degree in co-relation 1318. Up to 718 conditions per place. [2023-11-19 07:51:04,127 INFO L140 encePairwiseOnDemand]: 534/538 looper letters, 33 selfloop transitions, 2 changer transitions 19/57 dead transitions. [2023-11-19 07:51:04,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 57 transitions, 272 flow [2023-11-19 07:51:04,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:51:04,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:51:04,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 939 transitions. [2023-11-19 07:51:04,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43633828996282525 [2023-11-19 07:51:04,132 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 939 transitions. [2023-11-19 07:51:04,133 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 939 transitions. [2023-11-19 07:51:04,133 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:51:04,134 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 939 transitions. [2023-11-19 07:51:04,137 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 234.75) internal successors, (939), 4 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:04,143 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 538.0) internal successors, (2690), 5 states have internal predecessors, (2690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:04,145 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 538.0) internal successors, (2690), 5 states have internal predecessors, (2690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:04,145 INFO L175 Difference]: Start difference. First operand has 40 places, 37 transitions, 118 flow. Second operand 4 states and 939 transitions. [2023-11-19 07:51:04,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 57 transitions, 272 flow [2023-11-19 07:51:04,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 57 transitions, 270 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:51:04,148 INFO L231 Difference]: Finished difference. Result has 44 places, 38 transitions, 130 flow [2023-11-19 07:51:04,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=538, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=130, PETRI_PLACES=44, PETRI_TRANSITIONS=38} [2023-11-19 07:51:04,150 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 7 predicate places. [2023-11-19 07:51:04,150 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 38 transitions, 130 flow [2023-11-19 07:51:04,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 228.25) internal successors, (913), 4 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:04,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:51:04,151 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] [2023-11-19 07:51:04,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 07:51:04,152 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 07:51:04,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:51:04,152 INFO L85 PathProgramCache]: Analyzing trace with hash -602096577, now seen corresponding path program 1 times [2023-11-19 07:51:04,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:51:04,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571290617] [2023-11-19 07:51:04,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:51:04,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:51:04,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:51:04,373 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:51:04,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:51:04,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571290617] [2023-11-19 07:51:04,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571290617] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:51:04,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:51:04,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:51:04,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735202828] [2023-11-19 07:51:04,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:51:04,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:51:04,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:51:04,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:51:04,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:51:04,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 538 [2023-11-19 07:51:04,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 38 transitions, 130 flow. Second operand has 4 states, 4 states have (on average 228.5) internal successors, (914), 4 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:04,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:51:04,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 538 [2023-11-19 07:51:04,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:51:04,741 INFO L124 PetriNetUnfolderBase]: 572/896 cut-off events. [2023-11-19 07:51:04,741 INFO L125 PetriNetUnfolderBase]: For 432/432 co-relation queries the response was YES. [2023-11-19 07:51:04,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2297 conditions, 896 events. 572/896 cut-off events. For 432/432 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 3663 event pairs, 406 based on Foata normal form. 8/898 useless extension candidates. Maximal degree in co-relation 2277. Up to 716 conditions per place. [2023-11-19 07:51:04,747 INFO L140 encePairwiseOnDemand]: 533/538 looper letters, 33 selfloop transitions, 3 changer transitions 23/62 dead transitions. [2023-11-19 07:51:04,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 62 transitions, 316 flow [2023-11-19 07:51:04,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:51:04,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:51:04,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 943 transitions. [2023-11-19 07:51:04,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4381970260223048 [2023-11-19 07:51:04,752 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 943 transitions. [2023-11-19 07:51:04,753 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 943 transitions. [2023-11-19 07:51:04,753 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:51:04,754 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 943 transitions. [2023-11-19 07:51:04,757 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 235.75) internal successors, (943), 4 states have internal predecessors, (943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:04,763 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 538.0) internal successors, (2690), 5 states have internal predecessors, (2690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:04,764 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 538.0) internal successors, (2690), 5 states have internal predecessors, (2690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:04,764 INFO L175 Difference]: Start difference. First operand has 44 places, 38 transitions, 130 flow. Second operand 4 states and 943 transitions. [2023-11-19 07:51:04,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 62 transitions, 316 flow [2023-11-19 07:51:04,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 62 transitions, 308 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-11-19 07:51:04,768 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 142 flow [2023-11-19 07:51:04,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=538, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=142, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2023-11-19 07:51:04,769 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 9 predicate places. [2023-11-19 07:51:04,769 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 142 flow [2023-11-19 07:51:04,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 228.5) internal successors, (914), 4 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:04,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:51:04,770 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] [2023-11-19 07:51:04,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 07:51:04,771 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 07:51:04,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:51:04,771 INFO L85 PathProgramCache]: Analyzing trace with hash -317391252, now seen corresponding path program 1 times [2023-11-19 07:51:04,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:51:04,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121153816] [2023-11-19 07:51:04,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:51:04,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:51:04,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:51:04,979 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:51:04,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:51:04,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121153816] [2023-11-19 07:51:04,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121153816] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:51:04,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:51:04,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:51:04,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939249221] [2023-11-19 07:51:04,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:51:04,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:51:04,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:51:04,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:51:04,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:51:05,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 538 [2023-11-19 07:51:05,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 142 flow. Second operand has 4 states, 4 states have (on average 228.75) internal successors, (915), 4 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:05,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:51:05,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 538 [2023-11-19 07:51:05,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:51:05,304 INFO L124 PetriNetUnfolderBase]: 547/855 cut-off events. [2023-11-19 07:51:05,305 INFO L125 PetriNetUnfolderBase]: For 375/375 co-relation queries the response was YES. [2023-11-19 07:51:05,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2181 conditions, 855 events. 547/855 cut-off events. For 375/375 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 3470 event pairs, 390 based on Foata normal form. 4/855 useless extension candidates. Maximal degree in co-relation 2153. Up to 714 conditions per place. [2023-11-19 07:51:05,311 INFO L140 encePairwiseOnDemand]: 533/538 looper letters, 34 selfloop transitions, 3 changer transitions 17/57 dead transitions. [2023-11-19 07:51:05,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 57 transitions, 298 flow [2023-11-19 07:51:05,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:51:05,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:51:05,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 937 transitions. [2023-11-19 07:51:05,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4354089219330855 [2023-11-19 07:51:05,315 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 937 transitions. [2023-11-19 07:51:05,315 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 937 transitions. [2023-11-19 07:51:05,316 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:51:05,316 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 937 transitions. [2023-11-19 07:51:05,319 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 234.25) internal successors, (937), 4 states have internal predecessors, (937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:05,323 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 538.0) internal successors, (2690), 5 states have internal predecessors, (2690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:05,324 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 538.0) internal successors, (2690), 5 states have internal predecessors, (2690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:05,325 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 142 flow. Second operand 4 states and 937 transitions. [2023-11-19 07:51:05,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 57 transitions, 298 flow [2023-11-19 07:51:05,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 57 transitions, 288 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-11-19 07:51:05,328 INFO L231 Difference]: Finished difference. Result has 48 places, 40 transitions, 150 flow [2023-11-19 07:51:05,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=538, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=150, PETRI_PLACES=48, PETRI_TRANSITIONS=40} [2023-11-19 07:51:05,329 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 11 predicate places. [2023-11-19 07:51:05,329 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 40 transitions, 150 flow [2023-11-19 07:51:05,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 228.75) internal successors, (915), 4 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:05,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:51:05,330 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] [2023-11-19 07:51:05,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 07:51:05,330 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 07:51:05,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:51:05,331 INFO L85 PathProgramCache]: Analyzing trace with hash 870757549, now seen corresponding path program 1 times [2023-11-19 07:51:05,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:51:05,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638107296] [2023-11-19 07:51:05,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:51:05,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:51:05,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:51:05,738 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:51:05,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:51:05,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638107296] [2023-11-19 07:51:05,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638107296] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:51:05,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528349057] [2023-11-19 07:51:05,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:51:05,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:51:05,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00e14c5a-88cb-439d-a13d-2281d40a417c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:51:05,741 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00e14c5a-88cb-439d-a13d-2281d40a417c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:51:05,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00e14c5a-88cb-439d-a13d-2281d40a417c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:51:05,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:51:05,970 INFO L262 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 07:51:05,976 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:51:06,092 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:51:06,092 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:51:06,210 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:51:06,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528349057] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:51:06,210 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:51:06,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 12 [2023-11-19 07:51:06,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391316682] [2023-11-19 07:51:06,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:51:06,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-19 07:51:06,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:51:06,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-19 07:51:06,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2023-11-19 07:51:06,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 538 [2023-11-19 07:51:06,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 40 transitions, 150 flow. Second operand has 13 states, 13 states have (on average 215.23076923076923) internal successors, (2798), 13 states have internal predecessors, (2798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:06,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:51:06,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 538 [2023-11-19 07:51:06,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:51:07,006 INFO L124 PetriNetUnfolderBase]: 554/873 cut-off events. [2023-11-19 07:51:07,007 INFO L125 PetriNetUnfolderBase]: For 392/392 co-relation queries the response was YES. [2023-11-19 07:51:07,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2240 conditions, 873 events. 554/873 cut-off events. For 392/392 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3394 event pairs, 234 based on Foata normal form. 8/878 useless extension candidates. Maximal degree in co-relation 1875. Up to 633 conditions per place. [2023-11-19 07:51:07,015 INFO L140 encePairwiseOnDemand]: 531/538 looper letters, 36 selfloop transitions, 4 changer transitions 41/84 dead transitions. [2023-11-19 07:51:07,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 84 transitions, 446 flow [2023-11-19 07:51:07,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 07:51:07,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-19 07:51:07,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1772 transitions. [2023-11-19 07:51:07,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4117100371747212 [2023-11-19 07:51:07,024 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1772 transitions. [2023-11-19 07:51:07,024 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1772 transitions. [2023-11-19 07:51:07,026 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:51:07,026 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1772 transitions. [2023-11-19 07:51:07,031 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 221.5) internal successors, (1772), 8 states have internal predecessors, (1772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:07,041 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 538.0) internal successors, (4842), 9 states have internal predecessors, (4842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:07,042 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 538.0) internal successors, (4842), 9 states have internal predecessors, (4842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:07,043 INFO L175 Difference]: Start difference. First operand has 48 places, 40 transitions, 150 flow. Second operand 8 states and 1772 transitions. [2023-11-19 07:51:07,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 84 transitions, 446 flow [2023-11-19 07:51:07,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 84 transitions, 429 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-11-19 07:51:07,049 INFO L231 Difference]: Finished difference. Result has 55 places, 41 transitions, 164 flow [2023-11-19 07:51:07,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=538, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=164, PETRI_PLACES=55, PETRI_TRANSITIONS=41} [2023-11-19 07:51:07,053 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 18 predicate places. [2023-11-19 07:51:07,053 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 41 transitions, 164 flow [2023-11-19 07:51:07,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 215.23076923076923) internal successors, (2798), 13 states have internal predecessors, (2798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:07,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:51:07,056 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:51:07,086 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00e14c5a-88cb-439d-a13d-2281d40a417c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:51:07,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00e14c5a-88cb-439d-a13d-2281d40a417c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:51:07,271 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 07:51:07,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:51:07,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1634155705, now seen corresponding path program 2 times [2023-11-19 07:51:07,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:51:07,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559614050] [2023-11-19 07:51:07,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:51:07,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:51:07,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:51:07,462 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-19 07:51:07,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:51:07,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559614050] [2023-11-19 07:51:07,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559614050] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:51:07,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:51:07,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:51:07,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078678915] [2023-11-19 07:51:07,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:51:07,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:51:07,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:51:07,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:51:07,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:51:07,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 538 [2023-11-19 07:51:07,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 41 transitions, 164 flow. Second operand has 5 states, 5 states have (on average 243.6) internal successors, (1218), 5 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:07,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:51:07,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 538 [2023-11-19 07:51:07,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:51:07,866 INFO L124 PetriNetUnfolderBase]: 881/1339 cut-off events. [2023-11-19 07:51:07,866 INFO L125 PetriNetUnfolderBase]: For 781/781 co-relation queries the response was YES. [2023-11-19 07:51:07,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3670 conditions, 1339 events. 881/1339 cut-off events. For 781/781 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 5071 event pairs, 346 based on Foata normal form. 42/1379 useless extension candidates. Maximal degree in co-relation 3632. Up to 492 conditions per place. [2023-11-19 07:51:07,880 INFO L140 encePairwiseOnDemand]: 533/538 looper letters, 65 selfloop transitions, 9 changer transitions 0/77 dead transitions. [2023-11-19 07:51:07,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 77 transitions, 434 flow [2023-11-19 07:51:07,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:51:07,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:51:07,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1018 transitions. [2023-11-19 07:51:07,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47304832713754646 [2023-11-19 07:51:07,885 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1018 transitions. [2023-11-19 07:51:07,885 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1018 transitions. [2023-11-19 07:51:07,886 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:51:07,886 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1018 transitions. [2023-11-19 07:51:07,889 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 254.5) internal successors, (1018), 4 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:07,894 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 538.0) internal successors, (2690), 5 states have internal predecessors, (2690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:07,895 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 538.0) internal successors, (2690), 5 states have internal predecessors, (2690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:07,895 INFO L175 Difference]: Start difference. First operand has 55 places, 41 transitions, 164 flow. Second operand 4 states and 1018 transitions. [2023-11-19 07:51:07,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 77 transitions, 434 flow [2023-11-19 07:51:07,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 77 transitions, 422 flow, removed 3 selfloop flow, removed 4 redundant places. [2023-11-19 07:51:07,900 INFO L231 Difference]: Finished difference. Result has 53 places, 47 transitions, 221 flow [2023-11-19 07:51:07,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=538, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=221, PETRI_PLACES=53, PETRI_TRANSITIONS=47} [2023-11-19 07:51:07,901 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 16 predicate places. [2023-11-19 07:51:07,901 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 47 transitions, 221 flow [2023-11-19 07:51:07,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 243.6) internal successors, (1218), 5 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:07,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:51:07,903 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:51:07,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-19 07:51:07,903 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 07:51:07,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:51:07,903 INFO L85 PathProgramCache]: Analyzing trace with hash 87848521, now seen corresponding path program 1 times [2023-11-19 07:51:07,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:51:07,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55804965] [2023-11-19 07:51:07,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:51:07,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:51:07,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:51:08,211 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-19 07:51:08,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:51:08,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55804965] [2023-11-19 07:51:08,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55804965] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:51:08,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868039998] [2023-11-19 07:51:08,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:51:08,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:51:08,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00e14c5a-88cb-439d-a13d-2281d40a417c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:51:08,216 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00e14c5a-88cb-439d-a13d-2281d40a417c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:51:08,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00e14c5a-88cb-439d-a13d-2281d40a417c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:51:08,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:51:08,420 INFO L262 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 07:51:08,423 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:51:08,516 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-19 07:51:08,516 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:51:08,649 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-19 07:51:08,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868039998] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:51:08,649 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:51:08,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-19 07:51:08,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568394498] [2023-11-19 07:51:08,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:51:08,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 07:51:08,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:51:08,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 07:51:08,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-11-19 07:51:08,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 214 out of 538 [2023-11-19 07:51:08,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 47 transitions, 221 flow. Second operand has 12 states, 12 states have (on average 218.16666666666666) internal successors, (2618), 12 states have internal predecessors, (2618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:08,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:51:08,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 214 of 538 [2023-11-19 07:51:08,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:51:09,473 INFO L124 PetriNetUnfolderBase]: 1118/1796 cut-off events. [2023-11-19 07:51:09,473 INFO L125 PetriNetUnfolderBase]: For 2305/2305 co-relation queries the response was YES. [2023-11-19 07:51:09,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5593 conditions, 1796 events. 1118/1796 cut-off events. For 2305/2305 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 7848 event pairs, 731 based on Foata normal form. 132/1925 useless extension candidates. Maximal degree in co-relation 5557. Up to 1328 conditions per place. [2023-11-19 07:51:09,487 INFO L140 encePairwiseOnDemand]: 531/538 looper letters, 39 selfloop transitions, 6 changer transitions 44/92 dead transitions. [2023-11-19 07:51:09,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 92 transitions, 601 flow [2023-11-19 07:51:09,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 07:51:09,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-19 07:51:09,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1998 transitions. [2023-11-19 07:51:09,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41263940520446096 [2023-11-19 07:51:09,496 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1998 transitions. [2023-11-19 07:51:09,496 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1998 transitions. [2023-11-19 07:51:09,498 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:51:09,498 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1998 transitions. [2023-11-19 07:51:09,505 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 222.0) internal successors, (1998), 9 states have internal predecessors, (1998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:09,524 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 538.0) internal successors, (5380), 10 states have internal predecessors, (5380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:09,525 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 538.0) internal successors, (5380), 10 states have internal predecessors, (5380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:09,525 INFO L175 Difference]: Start difference. First operand has 53 places, 47 transitions, 221 flow. Second operand 9 states and 1998 transitions. [2023-11-19 07:51:09,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 92 transitions, 601 flow [2023-11-19 07:51:09,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 92 transitions, 575 flow, removed 13 selfloop flow, removed 0 redundant places. [2023-11-19 07:51:09,532 INFO L231 Difference]: Finished difference. Result has 64 places, 48 transitions, 237 flow [2023-11-19 07:51:09,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=538, PETRI_DIFFERENCE_MINUEND_FLOW=209, 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=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=237, PETRI_PLACES=64, PETRI_TRANSITIONS=48} [2023-11-19 07:51:09,533 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 27 predicate places. [2023-11-19 07:51:09,533 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 48 transitions, 237 flow [2023-11-19 07:51:09,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 218.16666666666666) internal successors, (2618), 12 states have internal predecessors, (2618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:09,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:51:09,534 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:51:09,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00e14c5a-88cb-439d-a13d-2281d40a417c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:51:09,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00e14c5a-88cb-439d-a13d-2281d40a417c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:51:09,748 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 07:51:09,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:51:09,748 INFO L85 PathProgramCache]: Analyzing trace with hash -673421844, now seen corresponding path program 2 times [2023-11-19 07:51:09,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:51:09,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369808614] [2023-11-19 07:51:09,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:51:09,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:51:10,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:51:14,993 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:51:14,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:51:14,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369808614] [2023-11-19 07:51:14,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369808614] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:51:14,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167218316] [2023-11-19 07:51:14,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:51:14,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:51:14,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00e14c5a-88cb-439d-a13d-2281d40a417c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:51:14,996 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00e14c5a-88cb-439d-a13d-2281d40a417c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:51:15,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00e14c5a-88cb-439d-a13d-2281d40a417c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:51:15,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:51:15,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:51:15,228 INFO L262 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 50 conjunts are in the unsatisfiable core [2023-11-19 07:51:15,234 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:51:16,522 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 07:51:16,522 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:51:22,492 INFO L349 Elim1Store]: treesize reduction 11, result has 97.7 percent of original size [2023-11-19 07:51:22,493 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 126 treesize of output 486 [2023-11-19 07:51:24,464 INFO L349 Elim1Store]: treesize reduction 16, result has 97.3 percent of original size [2023-11-19 07:51:24,465 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 145 treesize of output 616