./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-buffer-mult.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_2e554726-5da0-4907-b50b-3bb0825b47a6/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e554726-5da0-4907-b50b-3bb0825b47a6/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_2e554726-5da0-4907-b50b-3bb0825b47a6/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e554726-5da0-4907-b50b-3bb0825b47a6/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-buffer-mult.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e554726-5da0-4907-b50b-3bb0825b47a6/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_2e554726-5da0-4907-b50b-3bb0825b47a6/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 e5124dd4a5a155d8a4e322a35428820633f9eccdd993e14120e650d1ba1fbebe --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:38:56,626 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:38:56,741 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e554726-5da0-4907-b50b-3bb0825b47a6/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:38:56,748 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:38:56,749 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:38:56,788 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:38:56,789 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:38:56,789 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:38:56,791 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:38:56,796 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:38:56,797 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:38:56,797 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:38:56,798 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:38:56,800 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:38:56,800 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:38:56,801 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:38:56,801 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:38:56,802 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:38:56,802 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:38:56,802 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:38:56,803 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:38:56,804 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:38:56,804 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:38:56,805 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:38:56,805 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:38:56,806 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:38:56,806 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:38:56,807 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:38:56,807 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:38:56,808 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:38:56,809 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:38:56,809 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:38:56,810 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:38:56,810 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:38:56,810 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:38:56,810 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:38:56,811 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:38:56,811 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:38:56,811 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:38:56,811 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_2e554726-5da0-4907-b50b-3bb0825b47a6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e554726-5da0-4907-b50b-3bb0825b47a6/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e5124dd4a5a155d8a4e322a35428820633f9eccdd993e14120e650d1ba1fbebe [2023-11-19 07:38:57,161 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:38:57,195 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:38:57,197 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:38:57,199 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:38:57,199 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:38:57,201 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e554726-5da0-4907-b50b-3bb0825b47a6/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/weaver/popl20-more-buffer-mult.wvr.c [2023-11-19 07:39:00,410 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:39:00,615 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:39:00,616 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e554726-5da0-4907-b50b-3bb0825b47a6/sv-benchmarks/c/weaver/popl20-more-buffer-mult.wvr.c [2023-11-19 07:39:00,625 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e554726-5da0-4907-b50b-3bb0825b47a6/bin/uautomizer-verify-uCwYo4JHxu/data/294750eda/3b6260a0619748f5acb5750221fb18ba/FLAG263671687 [2023-11-19 07:39:00,640 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e554726-5da0-4907-b50b-3bb0825b47a6/bin/uautomizer-verify-uCwYo4JHxu/data/294750eda/3b6260a0619748f5acb5750221fb18ba [2023-11-19 07:39:00,642 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:39:00,644 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:39:00,645 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:39:00,646 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:39:00,651 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:39:00,652 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:39:00" (1/1) ... [2023-11-19 07:39:00,653 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e7df0c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:00, skipping insertion in model container [2023-11-19 07:39:00,654 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:39:00" (1/1) ... [2023-11-19 07:39:00,707 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:39:00,907 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_2e554726-5da0-4907-b50b-3bb0825b47a6/sv-benchmarks/c/weaver/popl20-more-buffer-mult.wvr.c[4270,4283] [2023-11-19 07:39:00,919 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:39:00,931 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:39:00,970 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_2e554726-5da0-4907-b50b-3bb0825b47a6/sv-benchmarks/c/weaver/popl20-more-buffer-mult.wvr.c[4270,4283] [2023-11-19 07:39:00,975 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:39:00,990 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:39:00,991 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:39:00,999 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:39:01,000 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:01 WrapperNode [2023-11-19 07:39:01,000 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:39:01,006 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:39:01,006 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:39:01,006 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:39:01,013 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:01" (1/1) ... [2023-11-19 07:39:01,023 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:01" (1/1) ... [2023-11-19 07:39:01,068 INFO L138 Inliner]: procedures = 27, calls = 80, calls flagged for inlining = 18, calls inlined = 22, statements flattened = 320 [2023-11-19 07:39:01,071 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:39:01,071 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:39:01,071 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:39:01,071 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:39:01,079 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:01" (1/1) ... [2023-11-19 07:39:01,079 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:01" (1/1) ... [2023-11-19 07:39:01,084 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:01" (1/1) ... [2023-11-19 07:39:01,085 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:01" (1/1) ... [2023-11-19 07:39:01,098 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:01" (1/1) ... [2023-11-19 07:39:01,104 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:01" (1/1) ... [2023-11-19 07:39:01,107 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:01" (1/1) ... [2023-11-19 07:39:01,110 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:01" (1/1) ... [2023-11-19 07:39:01,115 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:39:01,116 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:39:01,117 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:39:01,117 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:39:01,118 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:01" (1/1) ... [2023-11-19 07:39:01,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:39:01,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e554726-5da0-4907-b50b-3bb0825b47a6/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:39:01,153 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e554726-5da0-4907-b50b-3bb0825b47a6/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:39:01,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e554726-5da0-4907-b50b-3bb0825b47a6/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:39:01,202 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:39:01,202 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:39:01,203 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:39:01,203 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:39:01,203 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-19 07:39:01,204 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-19 07:39:01,205 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-19 07:39:01,205 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-19 07:39:01,205 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-19 07:39:01,205 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-19 07:39:01,205 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-11-19 07:39:01,208 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-11-19 07:39:01,208 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:39:01,209 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-19 07:39:01,209 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-19 07:39:01,209 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 07:39:01,209 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:39:01,209 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:39:01,210 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:39:01,211 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 07:39:01,380 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:39:01,384 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:39:01,994 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:39:02,264 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:39:02,264 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-19 07:39:02,273 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:39:02 BoogieIcfgContainer [2023-11-19 07:39:02,273 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:39:02,277 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:39:02,278 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:39:02,282 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:39:02,282 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:39:00" (1/3) ... [2023-11-19 07:39:02,283 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4450b0c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:39:02, skipping insertion in model container [2023-11-19 07:39:02,284 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:01" (2/3) ... [2023-11-19 07:39:02,286 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4450b0c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:39:02, skipping insertion in model container [2023-11-19 07:39:02,286 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:39:02" (3/3) ... [2023-11-19 07:39:02,288 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-buffer-mult.wvr.c [2023-11-19 07:39:02,299 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-19 07:39:02,309 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:39:02,310 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:39:02,310 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:39:02,404 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-19 07:39:02,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 236 places, 241 transitions, 510 flow [2023-11-19 07:39:02,625 INFO L124 PetriNetUnfolderBase]: 18/237 cut-off events. [2023-11-19 07:39:02,626 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-19 07:39:02,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 254 conditions, 237 events. 18/237 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 128 event pairs, 0 based on Foata normal form. 0/218 useless extension candidates. Maximal degree in co-relation 197. Up to 2 conditions per place. [2023-11-19 07:39:02,634 INFO L82 GeneralOperation]: Start removeDead. Operand has 236 places, 241 transitions, 510 flow [2023-11-19 07:39:02,649 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 219 places, 224 transitions, 472 flow [2023-11-19 07:39:02,653 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:39:02,668 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 219 places, 224 transitions, 472 flow [2023-11-19 07:39:02,673 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 219 places, 224 transitions, 472 flow [2023-11-19 07:39:02,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 219 places, 224 transitions, 472 flow [2023-11-19 07:39:02,761 INFO L124 PetriNetUnfolderBase]: 18/224 cut-off events. [2023-11-19 07:39:02,761 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-19 07:39:02,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 241 conditions, 224 events. 18/224 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 127 event pairs, 0 based on Foata normal form. 0/206 useless extension candidates. Maximal degree in co-relation 197. Up to 2 conditions per place. [2023-11-19 07:39:02,767 INFO L119 LiptonReduction]: Number of co-enabled transitions 2348 [2023-11-19 07:39:12,495 INFO L134 LiptonReduction]: Checked pairs total: 4111 [2023-11-19 07:39:12,495 INFO L136 LiptonReduction]: Total number of compositions: 222 [2023-11-19 07:39:12,511 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:39:12,518 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;@1f6e2efb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:39:12,518 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-19 07:39:12,527 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:39:12,527 INFO L124 PetriNetUnfolderBase]: 6/36 cut-off events. [2023-11-19 07:39:12,528 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-19 07:39:12,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:39:12,529 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] [2023-11-19 07:39:12,529 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-19 07:39:12,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:39:12,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1241527421, now seen corresponding path program 1 times [2023-11-19 07:39:12,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:39:12,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070407420] [2023-11-19 07:39:12,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:39:12,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:39:12,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:39:13,064 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 07:39:13,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:39:13,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070407420] [2023-11-19 07:39:13,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070407420] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:39:13,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:39:13,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:39:13,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62719119] [2023-11-19 07:39:13,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:39:13,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:39:13,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:39:13,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:39:13,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:39:13,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 463 [2023-11-19 07:39:13,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 222.0) internal successors, (666), 3 states have internal predecessors, (666), 0 states have call successors, (0), 0 states 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 07:39:13,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:39:13,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 463 [2023-11-19 07:39:13,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:39:13,890 INFO L124 PetriNetUnfolderBase]: 3411/4671 cut-off events. [2023-11-19 07:39:13,891 INFO L125 PetriNetUnfolderBase]: For 324/324 co-relation queries the response was YES. [2023-11-19 07:39:13,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9331 conditions, 4671 events. 3411/4671 cut-off events. For 324/324 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 19402 event pairs, 1113 based on Foata normal form. 1/3556 useless extension candidates. Maximal degree in co-relation 7592. Up to 2477 conditions per place. [2023-11-19 07:39:13,936 INFO L140 encePairwiseOnDemand]: 459/463 looper letters, 55 selfloop transitions, 3 changer transitions 1/61 dead transitions. [2023-11-19 07:39:13,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 61 transitions, 279 flow [2023-11-19 07:39:13,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:39:13,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:39:13,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 699 transitions. [2023-11-19 07:39:13,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5032397408207343 [2023-11-19 07:39:13,964 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 699 transitions. [2023-11-19 07:39:13,965 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 699 transitions. [2023-11-19 07:39:13,970 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:39:13,973 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 699 transitions. [2023-11-19 07:39:13,979 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 233.0) internal successors, (699), 3 states have internal predecessors, (699), 0 states have call successors, (0), 0 states 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 07:39:13,988 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 463.0) internal successors, (1852), 4 states have internal predecessors, (1852), 0 states have call successors, (0), 0 states 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 07:39:13,990 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 463.0) internal successors, (1852), 4 states have internal predecessors, (1852), 0 states have call successors, (0), 0 states 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 07:39:13,992 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 98 flow. Second operand 3 states and 699 transitions. [2023-11-19 07:39:13,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 61 transitions, 279 flow [2023-11-19 07:39:14,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 61 transitions, 253 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-11-19 07:39:14,006 INFO L231 Difference]: Finished difference. Result has 39 places, 39 transitions, 101 flow [2023-11-19 07:39:14,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=463, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=101, PETRI_PLACES=39, PETRI_TRANSITIONS=39} [2023-11-19 07:39:14,015 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -5 predicate places. [2023-11-19 07:39:14,016 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 39 transitions, 101 flow [2023-11-19 07:39:14,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 222.0) internal successors, (666), 3 states have internal predecessors, (666), 0 states have call successors, (0), 0 states 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 07:39:14,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:39:14,017 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 07:39:14,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:39:14,018 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-19 07:39:14,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:39:14,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1911283178, now seen corresponding path program 1 times [2023-11-19 07:39:14,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:39:14,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601022616] [2023-11-19 07:39:14,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:39:14,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:39:14,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:39:14,230 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 07:39:14,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:39:14,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601022616] [2023-11-19 07:39:14,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601022616] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:39:14,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:39:14,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:39:14,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849040560] [2023-11-19 07:39:14,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:39:14,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:39:14,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:39:14,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:39:14,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:39:14,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 463 [2023-11-19 07:39:14,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 39 transitions, 101 flow. Second operand has 3 states, 3 states have (on average 219.33333333333334) internal successors, (658), 3 states have internal predecessors, (658), 0 states have call successors, (0), 0 states 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 07:39:14,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:39:14,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 463 [2023-11-19 07:39:14,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:39:15,091 INFO L124 PetriNetUnfolderBase]: 4555/6208 cut-off events. [2023-11-19 07:39:15,092 INFO L125 PetriNetUnfolderBase]: For 938/938 co-relation queries the response was YES. [2023-11-19 07:39:15,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13508 conditions, 6208 events. 4555/6208 cut-off events. For 938/938 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 27444 event pairs, 1559 based on Foata normal form. 194/5694 useless extension candidates. Maximal degree in co-relation 5989. Up to 3774 conditions per place. [2023-11-19 07:39:15,143 INFO L140 encePairwiseOnDemand]: 460/463 looper letters, 62 selfloop transitions, 2 changer transitions 0/66 dead transitions. [2023-11-19 07:39:15,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 66 transitions, 297 flow [2023-11-19 07:39:15,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:39:15,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:39:15,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 692 transitions. [2023-11-19 07:39:15,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49820014398848095 [2023-11-19 07:39:15,151 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 692 transitions. [2023-11-19 07:39:15,151 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 692 transitions. [2023-11-19 07:39:15,152 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:39:15,152 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 692 transitions. [2023-11-19 07:39:15,155 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 230.66666666666666) internal successors, (692), 3 states have internal predecessors, (692), 0 states have call successors, (0), 0 states 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 07:39:15,159 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 463.0) internal successors, (1852), 4 states have internal predecessors, (1852), 0 states have call successors, (0), 0 states 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 07:39:15,161 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 463.0) internal successors, (1852), 4 states have internal predecessors, (1852), 0 states have call successors, (0), 0 states 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 07:39:15,162 INFO L175 Difference]: Start difference. First operand has 39 places, 39 transitions, 101 flow. Second operand 3 states and 692 transitions. [2023-11-19 07:39:15,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 66 transitions, 297 flow [2023-11-19 07:39:15,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 66 transitions, 293 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:39:15,171 INFO L231 Difference]: Finished difference. Result has 41 places, 40 transitions, 112 flow [2023-11-19 07:39:15,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=463, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=41, PETRI_TRANSITIONS=40} [2023-11-19 07:39:15,173 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -3 predicate places. [2023-11-19 07:39:15,173 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 40 transitions, 112 flow [2023-11-19 07:39:15,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 219.33333333333334) internal successors, (658), 3 states have internal predecessors, (658), 0 states have call successors, (0), 0 states 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 07:39:15,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:39:15,174 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 07:39:15,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:39:15,175 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-19 07:39:15,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:39:15,178 INFO L85 PathProgramCache]: Analyzing trace with hash -233992309, now seen corresponding path program 1 times [2023-11-19 07:39:15,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:39:15,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188215295] [2023-11-19 07:39:15,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:39:15,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:39:15,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:39:15,388 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 07:39:15,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:39:15,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188215295] [2023-11-19 07:39:15,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188215295] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:39:15,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:39:15,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:39:15,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083917780] [2023-11-19 07:39:15,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:39:15,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:39:15,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:39:15,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:39:15,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:39:15,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 463 [2023-11-19 07:39:15,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 40 transitions, 112 flow. Second operand has 3 states, 3 states have (on average 219.33333333333334) internal successors, (658), 3 states have internal predecessors, (658), 0 states have call successors, (0), 0 states 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 07:39:15,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:39:15,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 463 [2023-11-19 07:39:15,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:39:16,387 INFO L124 PetriNetUnfolderBase]: 5753/7914 cut-off events. [2023-11-19 07:39:16,387 INFO L125 PetriNetUnfolderBase]: For 2356/2356 co-relation queries the response was YES. [2023-11-19 07:39:16,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17751 conditions, 7914 events. 5753/7914 cut-off events. For 2356/2356 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 36546 event pairs, 2011 based on Foata normal form. 214/7490 useless extension candidates. Maximal degree in co-relation 11150. Up to 4837 conditions per place. [2023-11-19 07:39:16,444 INFO L140 encePairwiseOnDemand]: 460/463 looper letters, 62 selfloop transitions, 2 changer transitions 0/66 dead transitions. [2023-11-19 07:39:16,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 66 transitions, 313 flow [2023-11-19 07:39:16,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:39:16,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:39:16,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 690 transitions. [2023-11-19 07:39:16,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49676025917926564 [2023-11-19 07:39:16,448 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 690 transitions. [2023-11-19 07:39:16,448 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 690 transitions. [2023-11-19 07:39:16,449 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:39:16,449 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 690 transitions. [2023-11-19 07:39:16,451 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 230.0) internal successors, (690), 3 states have internal predecessors, (690), 0 states have call successors, (0), 0 states 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 07:39:16,455 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 463.0) internal successors, (1852), 4 states have internal predecessors, (1852), 0 states have call successors, (0), 0 states 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 07:39:16,457 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 463.0) internal successors, (1852), 4 states have internal predecessors, (1852), 0 states have call successors, (0), 0 states 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 07:39:16,457 INFO L175 Difference]: Start difference. First operand has 41 places, 40 transitions, 112 flow. Second operand 3 states and 690 transitions. [2023-11-19 07:39:16,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 66 transitions, 313 flow [2023-11-19 07:39:16,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 66 transitions, 310 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:39:16,461 INFO L231 Difference]: Finished difference. Result has 43 places, 41 transitions, 124 flow [2023-11-19 07:39:16,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=463, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=124, PETRI_PLACES=43, PETRI_TRANSITIONS=41} [2023-11-19 07:39:16,462 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -1 predicate places. [2023-11-19 07:39:16,462 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 41 transitions, 124 flow [2023-11-19 07:39:16,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 219.33333333333334) internal successors, (658), 3 states have internal predecessors, (658), 0 states have call successors, (0), 0 states 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 07:39:16,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:39:16,463 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 07:39:16,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 07:39:16,464 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-19 07:39:16,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:39:16,464 INFO L85 PathProgramCache]: Analyzing trace with hash 920626671, now seen corresponding path program 1 times [2023-11-19 07:39:16,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:39:16,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174434322] [2023-11-19 07:39:16,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:39:16,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:39:16,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:39:16,643 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 07:39:16,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:39:16,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174434322] [2023-11-19 07:39:16,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174434322] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:39:16,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:39:16,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:39:16,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635984072] [2023-11-19 07:39:16,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:39:16,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:39:16,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:39:16,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:39:16,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:39:16,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 463 [2023-11-19 07:39:16,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 41 transitions, 124 flow. Second operand has 4 states, 4 states have (on average 207.5) internal successors, (830), 4 states have internal predecessors, (830), 0 states have call successors, (0), 0 states 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 07:39:16,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:39:16,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 463 [2023-11-19 07:39:16,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:39:18,184 INFO L124 PetriNetUnfolderBase]: 7675/10718 cut-off events. [2023-11-19 07:39:18,184 INFO L125 PetriNetUnfolderBase]: For 3956/3956 co-relation queries the response was YES. [2023-11-19 07:39:18,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24963 conditions, 10718 events. 7675/10718 cut-off events. For 3956/3956 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 51496 event pairs, 6276 based on Foata normal form. 194/10817 useless extension candidates. Maximal degree in co-relation 14459. Up to 7657 conditions per place. [2023-11-19 07:39:18,250 INFO L140 encePairwiseOnDemand]: 457/463 looper letters, 69 selfloop transitions, 5 changer transitions 0/76 dead transitions. [2023-11-19 07:39:18,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 76 transitions, 365 flow [2023-11-19 07:39:18,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:39:18,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:39:18,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1069 transitions. [2023-11-19 07:39:18,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46177105831533477 [2023-11-19 07:39:18,255 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1069 transitions. [2023-11-19 07:39:18,255 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1069 transitions. [2023-11-19 07:39:18,256 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:39:18,257 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1069 transitions. [2023-11-19 07:39:18,260 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 213.8) internal successors, (1069), 5 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states 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 07:39:18,266 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 463.0) internal successors, (2778), 6 states have internal predecessors, (2778), 0 states have call successors, (0), 0 states 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 07:39:18,268 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 463.0) internal successors, (2778), 6 states have internal predecessors, (2778), 0 states have call successors, (0), 0 states 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 07:39:18,268 INFO L175 Difference]: Start difference. First operand has 43 places, 41 transitions, 124 flow. Second operand 5 states and 1069 transitions. [2023-11-19 07:39:18,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 76 transitions, 365 flow [2023-11-19 07:39:18,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 76 transitions, 362 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:39:18,273 INFO L231 Difference]: Finished difference. Result has 49 places, 45 transitions, 158 flow [2023-11-19 07:39:18,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=463, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=158, PETRI_PLACES=49, PETRI_TRANSITIONS=45} [2023-11-19 07:39:18,274 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 5 predicate places. [2023-11-19 07:39:18,275 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 45 transitions, 158 flow [2023-11-19 07:39:18,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 207.5) internal successors, (830), 4 states have internal predecessors, (830), 0 states have call successors, (0), 0 states 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 07:39:18,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:39:18,276 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 07:39:18,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 07:39:18,276 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-19 07:39:18,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:39:18,277 INFO L85 PathProgramCache]: Analyzing trace with hash -890298661, now seen corresponding path program 1 times [2023-11-19 07:39:18,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:39:18,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688009152] [2023-11-19 07:39:18,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:39:18,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:39:18,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:39:18,434 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 07:39:18,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:39:18,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688009152] [2023-11-19 07:39:18,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688009152] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:39:18,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:39:18,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:39:18,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496103947] [2023-11-19 07:39:18,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:39:18,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:39:18,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:39:18,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:39:18,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:39:18,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 463 [2023-11-19 07:39:18,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 45 transitions, 158 flow. Second operand has 4 states, 4 states have (on average 207.5) internal successors, (830), 4 states have internal predecessors, (830), 0 states have call successors, (0), 0 states 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 07:39:18,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:39:18,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 463 [2023-11-19 07:39:18,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:39:20,281 INFO L124 PetriNetUnfolderBase]: 10245/14538 cut-off events. [2023-11-19 07:39:20,281 INFO L125 PetriNetUnfolderBase]: For 5358/5358 co-relation queries the response was YES. [2023-11-19 07:39:20,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33123 conditions, 14538 events. 10245/14538 cut-off events. For 5358/5358 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 75697 event pairs, 8647 based on Foata normal form. 348/14833 useless extension candidates. Maximal degree in co-relation 24990. Up to 10312 conditions per place. [2023-11-19 07:39:20,379 INFO L140 encePairwiseOnDemand]: 459/463 looper letters, 68 selfloop transitions, 5 changer transitions 1/76 dead transitions. [2023-11-19 07:39:20,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 76 transitions, 396 flow [2023-11-19 07:39:20,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:39:20,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:39:20,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 865 transitions. [2023-11-19 07:39:20,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46706263498920086 [2023-11-19 07:39:20,384 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 865 transitions. [2023-11-19 07:39:20,384 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 865 transitions. [2023-11-19 07:39:20,385 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:39:20,385 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 865 transitions. [2023-11-19 07:39:20,388 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 216.25) internal successors, (865), 4 states have internal predecessors, (865), 0 states have call successors, (0), 0 states 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 07:39:20,392 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 463.0) internal successors, (2315), 5 states have internal predecessors, (2315), 0 states have call successors, (0), 0 states 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 07:39:20,394 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 463.0) internal successors, (2315), 5 states have internal predecessors, (2315), 0 states have call successors, (0), 0 states 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 07:39:20,394 INFO L175 Difference]: Start difference. First operand has 49 places, 45 transitions, 158 flow. Second operand 4 states and 865 transitions. [2023-11-19 07:39:20,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 76 transitions, 396 flow [2023-11-19 07:39:20,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 76 transitions, 390 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-11-19 07:39:20,399 INFO L231 Difference]: Finished difference. Result has 53 places, 46 transitions, 176 flow [2023-11-19 07:39:20,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=463, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=176, PETRI_PLACES=53, PETRI_TRANSITIONS=46} [2023-11-19 07:39:20,401 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 9 predicate places. [2023-11-19 07:39:20,401 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 46 transitions, 176 flow [2023-11-19 07:39:20,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 207.5) internal successors, (830), 4 states have internal predecessors, (830), 0 states have call successors, (0), 0 states 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 07:39:20,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:39:20,402 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:39:20,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 07:39:20,403 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-19 07:39:20,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:39:20,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1456941758, now seen corresponding path program 1 times [2023-11-19 07:39:20,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:39:20,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949331914] [2023-11-19 07:39:20,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:39:20,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:39:20,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:39:21,088 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:39:21,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:39:21,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949331914] [2023-11-19 07:39:21,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949331914] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:39:21,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228658289] [2023-11-19 07:39:21,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:39:21,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:39:21,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e554726-5da0-4907-b50b-3bb0825b47a6/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:39:21,092 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e554726-5da0-4907-b50b-3bb0825b47a6/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:39:21,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e554726-5da0-4907-b50b-3bb0825b47a6/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:39:21,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:39:21,249 INFO L262 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-19 07:39:21,256 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:39:21,447 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:39:21,447 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:39:21,638 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:39:21,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228658289] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:39:21,639 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:39:21,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6] total 14 [2023-11-19 07:39:21,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603684048] [2023-11-19 07:39:21,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:39:21,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-19 07:39:21,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:39:21,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-19 07:39:21,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2023-11-19 07:39:21,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 463 [2023-11-19 07:39:21,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 46 transitions, 176 flow. Second operand has 15 states, 15 states have (on average 199.53333333333333) internal successors, (2993), 15 states have internal predecessors, (2993), 0 states have call successors, (0), 0 states 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 07:39:21,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:39:21,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 463 [2023-11-19 07:39:21,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:39:27,094 INFO L124 PetriNetUnfolderBase]: 21090/29482 cut-off events. [2023-11-19 07:39:27,094 INFO L125 PetriNetUnfolderBase]: For 11564/11600 co-relation queries the response was YES. [2023-11-19 07:39:27,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69449 conditions, 29482 events. 21090/29482 cut-off events. For 11564/11600 co-relation queries the response was YES. Maximal size of possible extension queue 986. Compared 174221 event pairs, 768 based on Foata normal form. 1100/30580 useless extension candidates. Maximal degree in co-relation 60195. Up to 4347 conditions per place. [2023-11-19 07:39:27,272 INFO L140 encePairwiseOnDemand]: 452/463 looper letters, 422 selfloop transitions, 84 changer transitions 9/516 dead transitions. [2023-11-19 07:39:27,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 516 transitions, 2600 flow [2023-11-19 07:39:27,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-19 07:39:27,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-11-19 07:39:27,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 6524 transitions. [2023-11-19 07:39:27,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4545391207413084 [2023-11-19 07:39:27,296 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 6524 transitions. [2023-11-19 07:39:27,296 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 6524 transitions. [2023-11-19 07:39:27,301 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:39:27,301 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 6524 transitions. [2023-11-19 07:39:27,319 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 210.4516129032258) internal successors, (6524), 31 states have internal predecessors, (6524), 0 states have call successors, (0), 0 states 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 07:39:27,347 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 463.0) internal successors, (14816), 32 states have internal predecessors, (14816), 0 states have call successors, (0), 0 states 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 07:39:27,354 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 463.0) internal successors, (14816), 32 states have internal predecessors, (14816), 0 states have call successors, (0), 0 states 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 07:39:27,354 INFO L175 Difference]: Start difference. First operand has 53 places, 46 transitions, 176 flow. Second operand 31 states and 6524 transitions. [2023-11-19 07:39:27,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 516 transitions, 2600 flow [2023-11-19 07:39:27,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 516 transitions, 2590 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-11-19 07:39:27,373 INFO L231 Difference]: Finished difference. Result has 107 places, 132 transitions, 847 flow [2023-11-19 07:39:27,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=463, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=847, PETRI_PLACES=107, PETRI_TRANSITIONS=132} [2023-11-19 07:39:27,376 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 63 predicate places. [2023-11-19 07:39:27,376 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 132 transitions, 847 flow [2023-11-19 07:39:27,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 199.53333333333333) internal successors, (2993), 15 states have internal predecessors, (2993), 0 states have call successors, (0), 0 states 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 07:39:27,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:39:27,378 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:39:27,409 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e554726-5da0-4907-b50b-3bb0825b47a6/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:39:27,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e554726-5da0-4907-b50b-3bb0825b47a6/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-19 07:39:27,595 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-19 07:39:27,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:39:27,595 INFO L85 PathProgramCache]: Analyzing trace with hash -708118097, now seen corresponding path program 1 times [2023-11-19 07:39:27,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:39:27,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336253252] [2023-11-19 07:39:27,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:39:27,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:39:27,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:39:28,111 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:39:28,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:39:28,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336253252] [2023-11-19 07:39:28,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336253252] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:39:28,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811127148] [2023-11-19 07:39:28,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:39:28,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:39:28,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e554726-5da0-4907-b50b-3bb0825b47a6/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:39:28,114 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e554726-5da0-4907-b50b-3bb0825b47a6/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:39:28,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e554726-5da0-4907-b50b-3bb0825b47a6/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:39:28,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:39:28,266 INFO L262 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 07:39:28,269 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:39:28,549 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:39:28,549 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:39:28,658 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:39:28,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811127148] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:39:28,659 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:39:28,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-11-19 07:39:28,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446227032] [2023-11-19 07:39:28,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:39:28,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-19 07:39:28,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:39:28,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-19 07:39:28,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2023-11-19 07:39:28,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 463 [2023-11-19 07:39:28,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 132 transitions, 847 flow. Second operand has 13 states, 13 states have (on average 204.46153846153845) internal successors, (2658), 13 states have internal predecessors, (2658), 0 states have call successors, (0), 0 states 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 07:39:28,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:39:28,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 463 [2023-11-19 07:39:28,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:39:36,510 INFO L124 PetriNetUnfolderBase]: 32446/45248 cut-off events. [2023-11-19 07:39:36,511 INFO L125 PetriNetUnfolderBase]: For 169450/169626 co-relation queries the response was YES. [2023-11-19 07:39:36,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172223 conditions, 45248 events. 32446/45248 cut-off events. For 169450/169626 co-relation queries the response was YES. Maximal size of possible extension queue 1524. Compared 274405 event pairs, 3410 based on Foata normal form. 3032/48278 useless extension candidates. Maximal degree in co-relation 162978. Up to 11625 conditions per place. [2023-11-19 07:39:36,995 INFO L140 encePairwiseOnDemand]: 455/463 looper letters, 423 selfloop transitions, 149 changer transitions 0/573 dead transitions. [2023-11-19 07:39:36,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 573 transitions, 4781 flow [2023-11-19 07:39:36,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-19 07:39:36,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-19 07:39:37,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 3644 transitions. [2023-11-19 07:39:37,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4629653157159192 [2023-11-19 07:39:37,010 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 3644 transitions. [2023-11-19 07:39:37,010 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 3644 transitions. [2023-11-19 07:39:37,013 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:39:37,013 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 3644 transitions. [2023-11-19 07:39:37,024 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 214.35294117647058) internal successors, (3644), 17 states have internal predecessors, (3644), 0 states have call successors, (0), 0 states 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 07:39:37,049 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 463.0) internal successors, (8334), 18 states have internal predecessors, (8334), 0 states have call successors, (0), 0 states 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 07:39:37,061 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 463.0) internal successors, (8334), 18 states have internal predecessors, (8334), 0 states have call successors, (0), 0 states 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 07:39:37,061 INFO L175 Difference]: Start difference. First operand has 107 places, 132 transitions, 847 flow. Second operand 17 states and 3644 transitions. [2023-11-19 07:39:37,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 573 transitions, 4781 flow [2023-11-19 07:39:39,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 573 transitions, 4749 flow, removed 16 selfloop flow, removed 0 redundant places. [2023-11-19 07:39:39,437 INFO L231 Difference]: Finished difference. Result has 130 places, 243 transitions, 1961 flow [2023-11-19 07:39:39,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=463, PETRI_DIFFERENCE_MINUEND_FLOW=839, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1961, PETRI_PLACES=130, PETRI_TRANSITIONS=243} [2023-11-19 07:39:39,451 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 86 predicate places. [2023-11-19 07:39:39,452 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 243 transitions, 1961 flow [2023-11-19 07:39:39,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 204.46153846153845) internal successors, (2658), 13 states have internal predecessors, (2658), 0 states have call successors, (0), 0 states 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 07:39:39,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:39:39,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:39:39,480 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e554726-5da0-4907-b50b-3bb0825b47a6/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:39:39,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e554726-5da0-4907-b50b-3bb0825b47a6/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-19 07:39:39,657 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-19 07:39:39,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:39:39,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1348851875, now seen corresponding path program 2 times [2023-11-19 07:39:39,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:39:39,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240237785] [2023-11-19 07:39:39,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:39:39,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:39:39,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:39:40,144 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:39:40,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:39:40,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240237785] [2023-11-19 07:39:40,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240237785] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:39:40,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:39:40,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:39:40,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71385081] [2023-11-19 07:39:40,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:39:40,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:39:40,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:39:40,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:39:40,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:39:40,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 463 [2023-11-19 07:39:40,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 243 transitions, 1961 flow. Second operand has 6 states, 6 states have (on average 209.16666666666666) internal successors, (1255), 6 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states 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 07:39:40,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:39:40,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 463 [2023-11-19 07:39:40,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand