./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/parallel-parallel-sum-1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3136ed-9764-48d8-8a68-458f441ae588/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3136ed-9764-48d8-8a68-458f441ae588/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_1f3136ed-9764-48d8-8a68-458f441ae588/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3136ed-9764-48d8-8a68-458f441ae588/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/parallel-parallel-sum-1.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3136ed-9764-48d8-8a68-458f441ae588/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_1f3136ed-9764-48d8-8a68-458f441ae588/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 b1e99af7c76570461a4b0ac70d664412f250ec04f47fd9ca8c0f85236f1348c6 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:53:44,652 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:53:44,790 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3136ed-9764-48d8-8a68-458f441ae588/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:53:44,796 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:53:44,804 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:53:44,840 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:53:44,841 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:53:44,841 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:53:44,842 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:53:44,849 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:53:44,851 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:53:44,852 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:53:44,852 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:53:44,854 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:53:44,855 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:53:44,855 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:53:44,857 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:53:44,857 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:53:44,858 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:53:44,858 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:53:44,859 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:53:44,859 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:53:44,860 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:53:44,860 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:53:44,861 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:53:44,862 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:53:44,862 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:53:44,863 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:53:44,863 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:53:44,864 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:53:44,865 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:53:44,865 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:53:44,866 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:53:44,866 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:53:44,866 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:53:44,866 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:53:44,867 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:53:44,867 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:53:44,867 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:53:44,867 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_1f3136ed-9764-48d8-8a68-458f441ae588/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3136ed-9764-48d8-8a68-458f441ae588/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b1e99af7c76570461a4b0ac70d664412f250ec04f47fd9ca8c0f85236f1348c6 [2023-11-19 07:53:45,243 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:53:45,271 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:53:45,274 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:53:45,276 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:53:45,276 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:53:45,278 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3136ed-9764-48d8-8a68-458f441ae588/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/weaver/parallel-parallel-sum-1.wvr.c [2023-11-19 07:53:48,558 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:53:48,777 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:53:48,778 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3136ed-9764-48d8-8a68-458f441ae588/sv-benchmarks/c/weaver/parallel-parallel-sum-1.wvr.c [2023-11-19 07:53:48,788 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3136ed-9764-48d8-8a68-458f441ae588/bin/uautomizer-verify-uCwYo4JHxu/data/cb4d85240/807eb64425fa4d62a74dfb7171c88d17/FLAG8bddb809a [2023-11-19 07:53:48,805 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3136ed-9764-48d8-8a68-458f441ae588/bin/uautomizer-verify-uCwYo4JHxu/data/cb4d85240/807eb64425fa4d62a74dfb7171c88d17 [2023-11-19 07:53:48,808 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:53:48,809 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:53:48,811 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:53:48,811 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:53:48,821 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:53:48,822 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:53:48" (1/1) ... [2023-11-19 07:53:48,823 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7aefe3bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:53:48, skipping insertion in model container [2023-11-19 07:53:48,823 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:53:48" (1/1) ... [2023-11-19 07:53:48,865 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:53:49,128 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_1f3136ed-9764-48d8-8a68-458f441ae588/sv-benchmarks/c/weaver/parallel-parallel-sum-1.wvr.c[3694,3707] [2023-11-19 07:53:49,141 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:53:49,157 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:53:49,191 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_1f3136ed-9764-48d8-8a68-458f441ae588/sv-benchmarks/c/weaver/parallel-parallel-sum-1.wvr.c[3694,3707] [2023-11-19 07:53:49,197 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:53:49,212 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:53:49,212 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:53:49,221 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:53:49,221 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:53:49 WrapperNode [2023-11-19 07:53:49,222 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:53:49,223 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:53:49,223 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:53:49,223 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:53:49,231 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:53:49" (1/1) ... [2023-11-19 07:53:49,241 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:53:49" (1/1) ... [2023-11-19 07:53:49,295 INFO L138 Inliner]: procedures = 27, calls = 68, calls flagged for inlining = 18, calls inlined = 24, statements flattened = 315 [2023-11-19 07:53:49,296 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:53:49,297 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:53:49,297 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:53:49,297 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:53:49,307 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:53:49" (1/1) ... [2023-11-19 07:53:49,307 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:53:49" (1/1) ... [2023-11-19 07:53:49,313 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:53:49" (1/1) ... [2023-11-19 07:53:49,313 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:53:49" (1/1) ... [2023-11-19 07:53:49,335 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:53:49" (1/1) ... [2023-11-19 07:53:49,359 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:53:49" (1/1) ... [2023-11-19 07:53:49,362 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:53:49" (1/1) ... [2023-11-19 07:53:49,364 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:53:49" (1/1) ... [2023-11-19 07:53:49,372 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:53:49,373 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:53:49,373 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:53:49,373 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:53:49,374 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:53:49" (1/1) ... [2023-11-19 07:53:49,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:53:49,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3136ed-9764-48d8-8a68-458f441ae588/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:53:49,410 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3136ed-9764-48d8-8a68-458f441ae588/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:53:49,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3136ed-9764-48d8-8a68-458f441ae588/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:53:49,460 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:53:49,461 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:53:49,461 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:53:49,461 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:53:49,461 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-19 07:53:49,462 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-19 07:53:49,462 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-19 07:53:49,462 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-19 07:53:49,463 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-19 07:53:49,463 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-19 07:53:49,463 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-11-19 07:53:49,465 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-11-19 07:53:49,466 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:53:49,467 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-19 07:53:49,467 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-19 07:53:49,467 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 07:53:49,467 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:53:49,467 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:53:49,468 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:53:49,470 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 07:53:49,668 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:53:49,672 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:53:50,355 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:53:50,594 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:53:50,595 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-11-19 07:53:50,599 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:53:50 BoogieIcfgContainer [2023-11-19 07:53:50,600 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:53:50,603 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:53:50,603 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:53:50,606 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:53:50,607 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:53:48" (1/3) ... [2023-11-19 07:53:50,608 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@569534f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:53:50, skipping insertion in model container [2023-11-19 07:53:50,608 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:53:49" (2/3) ... [2023-11-19 07:53:50,608 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@569534f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:53:50, skipping insertion in model container [2023-11-19 07:53:50,608 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:53:50" (3/3) ... [2023-11-19 07:53:50,610 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-parallel-sum-1.wvr.c [2023-11-19 07:53:50,618 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-19 07:53:50,626 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:53:50,627 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:53:50,627 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:53:50,706 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-19 07:53:50,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 219 places, 221 transitions, 470 flow [2023-11-19 07:53:50,883 INFO L124 PetriNetUnfolderBase]: 15/217 cut-off events. [2023-11-19 07:53:50,883 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-19 07:53:50,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 234 conditions, 217 events. 15/217 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 143 event pairs, 0 based on Foata normal form. 0/201 useless extension candidates. Maximal degree in co-relation 175. Up to 2 conditions per place. [2023-11-19 07:53:50,892 INFO L82 GeneralOperation]: Start removeDead. Operand has 219 places, 221 transitions, 470 flow [2023-11-19 07:53:50,908 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 202 places, 204 transitions, 432 flow [2023-11-19 07:53:50,913 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:53:50,928 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 202 places, 204 transitions, 432 flow [2023-11-19 07:53:50,932 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 202 places, 204 transitions, 432 flow [2023-11-19 07:53:50,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 202 places, 204 transitions, 432 flow [2023-11-19 07:53:51,047 INFO L124 PetriNetUnfolderBase]: 15/204 cut-off events. [2023-11-19 07:53:51,048 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-19 07:53:51,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 221 conditions, 204 events. 15/204 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 142 event pairs, 0 based on Foata normal form. 0/189 useless extension candidates. Maximal degree in co-relation 175. Up to 2 conditions per place. [2023-11-19 07:53:51,054 INFO L119 LiptonReduction]: Number of co-enabled transitions 2904 [2023-11-19 07:54:01,524 INFO L134 LiptonReduction]: Checked pairs total: 5253 [2023-11-19 07:54:01,525 INFO L136 LiptonReduction]: Total number of compositions: 204 [2023-11-19 07:54:01,541 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:54:01,548 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;@515b208e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:54:01,548 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-19 07:54:01,557 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:54:01,557 INFO L124 PetriNetUnfolderBase]: 5/34 cut-off events. [2023-11-19 07:54:01,558 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-19 07:54:01,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:54:01,559 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:54:01,559 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 07:54:01,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:54:01,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1975734847, now seen corresponding path program 1 times [2023-11-19 07:54:01,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:54:01,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451199793] [2023-11-19 07:54:01,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:01,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:54:01,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:02,223 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 07:54:02,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:54:02,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451199793] [2023-11-19 07:54:02,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451199793] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:54:02,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:54:02,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:54:02,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388541677] [2023-11-19 07:54:02,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:54:02,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:54:02,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:54:02,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:54:02,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:54:02,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 425 [2023-11-19 07:54:02,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 35 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 197.33333333333334) internal successors, (592), 3 states have internal predecessors, (592), 0 states have call successors, (0), 0 states 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 07:54:02,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:54:02,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 425 [2023-11-19 07:54:02,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:54:03,168 INFO L124 PetriNetUnfolderBase]: 4382/5585 cut-off events. [2023-11-19 07:54:03,169 INFO L125 PetriNetUnfolderBase]: For 296/296 co-relation queries the response was YES. [2023-11-19 07:54:03,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11503 conditions, 5585 events. 4382/5585 cut-off events. For 296/296 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 24037 event pairs, 656 based on Foata normal form. 1/3759 useless extension candidates. Maximal degree in co-relation 9316. Up to 4602 conditions per place. [2023-11-19 07:54:03,222 INFO L140 encePairwiseOnDemand]: 419/425 looper letters, 51 selfloop transitions, 5 changer transitions 1/61 dead transitions. [2023-11-19 07:54:03,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 61 transitions, 281 flow [2023-11-19 07:54:03,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:54:03,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:54:03,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 628 transitions. [2023-11-19 07:54:03,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49254901960784314 [2023-11-19 07:54:03,242 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 628 transitions. [2023-11-19 07:54:03,243 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 628 transitions. [2023-11-19 07:54:03,246 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:54:03,249 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 628 transitions. [2023-11-19 07:54:03,254 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 209.33333333333334) internal successors, (628), 3 states have internal predecessors, (628), 0 states have call successors, (0), 0 states 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 07:54:03,261 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 425.0) internal successors, (1700), 4 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states 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 07:54:03,263 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 425.0) internal successors, (1700), 4 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states 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 07:54:03,265 INFO L175 Difference]: Start difference. First operand has 43 places, 35 transitions, 94 flow. Second operand 3 states and 628 transitions. [2023-11-19 07:54:03,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 61 transitions, 281 flow [2023-11-19 07:54:03,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 61 transitions, 251 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-11-19 07:54:03,280 INFO L231 Difference]: Finished difference. Result has 38 places, 39 transitions, 111 flow [2023-11-19 07:54:03,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=425, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=111, PETRI_PLACES=38, PETRI_TRANSITIONS=39} [2023-11-19 07:54:03,286 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -5 predicate places. [2023-11-19 07:54:03,287 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 39 transitions, 111 flow [2023-11-19 07:54:03,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 197.33333333333334) internal successors, (592), 3 states have internal predecessors, (592), 0 states have call successors, (0), 0 states 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 07:54:03,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:54:03,288 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:54:03,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:54:03,289 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 07:54:03,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:54:03,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1214281547, now seen corresponding path program 1 times [2023-11-19 07:54:03,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:54:03,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442222338] [2023-11-19 07:54:03,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:03,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:54:03,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:03,579 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 07:54:03,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:54:03,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442222338] [2023-11-19 07:54:03,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442222338] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:54:03,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:54:03,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:54:03,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626091060] [2023-11-19 07:54:03,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:54:03,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:54:03,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:54:03,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:54:03,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:54:03,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 425 [2023-11-19 07:54:03,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 39 transitions, 111 flow. Second operand has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states 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 07:54:03,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:54:03,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 425 [2023-11-19 07:54:03,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:54:04,624 INFO L124 PetriNetUnfolderBase]: 5147/6783 cut-off events. [2023-11-19 07:54:04,624 INFO L125 PetriNetUnfolderBase]: For 995/995 co-relation queries the response was YES. [2023-11-19 07:54:04,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15325 conditions, 6783 events. 5147/6783 cut-off events. For 995/995 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 32075 event pairs, 3005 based on Foata normal form. 1/4772 useless extension candidates. Maximal degree in co-relation 2011. Up to 5237 conditions per place. [2023-11-19 07:54:04,682 INFO L140 encePairwiseOnDemand]: 419/425 looper letters, 34 selfloop transitions, 2 changer transitions 26/66 dead transitions. [2023-11-19 07:54:04,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 66 transitions, 310 flow [2023-11-19 07:54:04,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:54:04,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:54:04,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 799 transitions. [2023-11-19 07:54:04,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47 [2023-11-19 07:54:04,692 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 799 transitions. [2023-11-19 07:54:04,693 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 799 transitions. [2023-11-19 07:54:04,694 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:54:04,694 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 799 transitions. [2023-11-19 07:54:04,697 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 199.75) internal successors, (799), 4 states have internal predecessors, (799), 0 states have call successors, (0), 0 states 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 07:54:04,705 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 425.0) internal successors, (2125), 5 states have internal predecessors, (2125), 0 states have call successors, (0), 0 states 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 07:54:04,708 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 425.0) internal successors, (2125), 5 states have internal predecessors, (2125), 0 states have call successors, (0), 0 states 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 07:54:04,708 INFO L175 Difference]: Start difference. First operand has 38 places, 39 transitions, 111 flow. Second operand 4 states and 799 transitions. [2023-11-19 07:54:04,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 66 transitions, 310 flow [2023-11-19 07:54:04,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 66 transitions, 302 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:54:04,719 INFO L231 Difference]: Finished difference. Result has 42 places, 40 transitions, 124 flow [2023-11-19 07:54:04,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=425, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=124, PETRI_PLACES=42, PETRI_TRANSITIONS=40} [2023-11-19 07:54:04,721 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -1 predicate places. [2023-11-19 07:54:04,721 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 40 transitions, 124 flow [2023-11-19 07:54:04,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states 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 07:54:04,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:54:04,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:54:04,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:54:04,723 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-19 07:54:04,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:54:04,726 INFO L85 PathProgramCache]: Analyzing trace with hash -1000722353, now seen corresponding path program 1 times [2023-11-19 07:54:04,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:54:04,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303549040] [2023-11-19 07:54:04,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:04,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:54:04,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:05,030 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:54:05,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:54:05,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303549040] [2023-11-19 07:54:05,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303549040] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:54:05,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473417396] [2023-11-19 07:54:05,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:05,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:54:05,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3136ed-9764-48d8-8a68-458f441ae588/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:54:05,040 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3136ed-9764-48d8-8a68-458f441ae588/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:54:05,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3136ed-9764-48d8-8a68-458f441ae588/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:54:05,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:05,189 INFO L262 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 07:54:05,196 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:54:05,311 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:54:05,311 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:54:05,376 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:54:05,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473417396] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:54:05,381 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:54:05,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2023-11-19 07:54:05,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927995129] [2023-11-19 07:54:05,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:54:05,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-19 07:54:05,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:54:05,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-19 07:54:05,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-11-19 07:54:05,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 425 [2023-11-19 07:54:05,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 40 transitions, 124 flow. Second operand has 10 states, 10 states have (on average 185.3) internal successors, (1853), 10 states have internal predecessors, (1853), 0 states have call successors, (0), 0 states 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 07:54:05,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:54:05,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 425 [2023-11-19 07:54:05,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:54:06,632 INFO L124 PetriNetUnfolderBase]: 5147/6785 cut-off events. [2023-11-19 07:54:06,632 INFO L125 PetriNetUnfolderBase]: For 2109/2109 co-relation queries the response was YES. [2023-11-19 07:54:06,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15755 conditions, 6785 events. 5147/6785 cut-off events. For 2109/2109 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 32026 event pairs, 3005 based on Foata normal form. 297/5930 useless extension candidates. Maximal degree in co-relation 15742. Up to 5236 conditions per place. [2023-11-19 07:54:06,707 INFO L140 encePairwiseOnDemand]: 419/425 looper letters, 59 selfloop transitions, 5 changer transitions 0/68 dead transitions. [2023-11-19 07:54:06,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 68 transitions, 334 flow [2023-11-19 07:54:06,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:54:06,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 07:54:06,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1152 transitions. [2023-11-19 07:54:06,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45176470588235296 [2023-11-19 07:54:06,713 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1152 transitions. [2023-11-19 07:54:06,713 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1152 transitions. [2023-11-19 07:54:06,714 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:54:06,715 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1152 transitions. [2023-11-19 07:54:06,719 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 192.0) internal successors, (1152), 6 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states 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 07:54:06,725 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 425.0) internal successors, (2975), 7 states have internal predecessors, (2975), 0 states have call successors, (0), 0 states 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 07:54:06,728 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 425.0) internal successors, (2975), 7 states have internal predecessors, (2975), 0 states have call successors, (0), 0 states 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 07:54:06,728 INFO L175 Difference]: Start difference. First operand has 42 places, 40 transitions, 124 flow. Second operand 6 states and 1152 transitions. [2023-11-19 07:54:06,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 68 transitions, 334 flow [2023-11-19 07:54:06,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 68 transitions, 326 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-11-19 07:54:06,738 INFO L231 Difference]: Finished difference. Result has 48 places, 43 transitions, 159 flow [2023-11-19 07:54:06,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=425, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=159, PETRI_PLACES=48, PETRI_TRANSITIONS=43} [2023-11-19 07:54:06,740 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 5 predicate places. [2023-11-19 07:54:06,740 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 43 transitions, 159 flow [2023-11-19 07:54:06,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 185.3) internal successors, (1853), 10 states have internal predecessors, (1853), 0 states have call successors, (0), 0 states 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 07:54:06,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:54:06,742 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 07:54:06,768 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3136ed-9764-48d8-8a68-458f441ae588/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-19 07:54:06,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3136ed-9764-48d8-8a68-458f441ae588/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:54:06,963 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 07:54:06,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:54:06,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1168440926, now seen corresponding path program 1 times [2023-11-19 07:54:06,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:54:06,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120740042] [2023-11-19 07:54:06,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:06,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:54:07,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:07,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:54:07,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:54:07,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120740042] [2023-11-19 07:54:07,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120740042] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:54:07,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546154593] [2023-11-19 07:54:07,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:07,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:54:07,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3136ed-9764-48d8-8a68-458f441ae588/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:54:07,293 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3136ed-9764-48d8-8a68-458f441ae588/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:54:07,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3136ed-9764-48d8-8a68-458f441ae588/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:54:07,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:07,437 INFO L262 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 07:54:07,440 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:54:07,538 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:54:07,538 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:54:07,600 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:54:07,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546154593] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:54:07,601 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:54:07,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2023-11-19 07:54:07,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226489156] [2023-11-19 07:54:07,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:54:07,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-19 07:54:07,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:54:07,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-19 07:54:07,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2023-11-19 07:54:07,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 425 [2023-11-19 07:54:07,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 43 transitions, 159 flow. Second operand has 10 states, 10 states have (on average 185.9) internal successors, (1859), 10 states have internal predecessors, (1859), 0 states have call successors, (0), 0 states 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 07:54:07,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:54:07,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 425 [2023-11-19 07:54:07,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:54:08,690 INFO L124 PetriNetUnfolderBase]: 4241/5551 cut-off events. [2023-11-19 07:54:08,690 INFO L125 PetriNetUnfolderBase]: For 3308/3308 co-relation queries the response was YES. [2023-11-19 07:54:08,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13927 conditions, 5551 events. 4241/5551 cut-off events. For 3308/3308 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 24748 event pairs, 2379 based on Foata normal form. 0/4701 useless extension candidates. Maximal degree in co-relation 13453. Up to 5236 conditions per place. [2023-11-19 07:54:08,736 INFO L140 encePairwiseOnDemand]: 419/425 looper letters, 33 selfloop transitions, 4 changer transitions 20/61 dead transitions. [2023-11-19 07:54:08,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 61 transitions, 313 flow [2023-11-19 07:54:08,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:54:08,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 07:54:08,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1147 transitions. [2023-11-19 07:54:08,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4498039215686275 [2023-11-19 07:54:08,742 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1147 transitions. [2023-11-19 07:54:08,742 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1147 transitions. [2023-11-19 07:54:08,743 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:54:08,743 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1147 transitions. [2023-11-19 07:54:08,747 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 191.16666666666666) internal successors, (1147), 6 states have internal predecessors, (1147), 0 states have call successors, (0), 0 states 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 07:54:08,753 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 425.0) internal successors, (2975), 7 states have internal predecessors, (2975), 0 states have call successors, (0), 0 states 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 07:54:08,755 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 425.0) internal successors, (2975), 7 states have internal predecessors, (2975), 0 states have call successors, (0), 0 states 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 07:54:08,755 INFO L175 Difference]: Start difference. First operand has 48 places, 43 transitions, 159 flow. Second operand 6 states and 1147 transitions. [2023-11-19 07:54:08,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 61 transitions, 313 flow [2023-11-19 07:54:08,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 61 transitions, 298 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-11-19 07:54:08,759 INFO L231 Difference]: Finished difference. Result has 51 places, 41 transitions, 142 flow [2023-11-19 07:54:08,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=425, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=142, PETRI_PLACES=51, PETRI_TRANSITIONS=41} [2023-11-19 07:54:08,760 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 8 predicate places. [2023-11-19 07:54:08,761 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 41 transitions, 142 flow [2023-11-19 07:54:08,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 185.9) internal successors, (1859), 10 states have internal predecessors, (1859), 0 states have call successors, (0), 0 states 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 07:54:08,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:54:08,762 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:54:08,788 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3136ed-9764-48d8-8a68-458f441ae588/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:54:08,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3136ed-9764-48d8-8a68-458f441ae588/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:54:08,976 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 07:54:08,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:54:08,977 INFO L85 PathProgramCache]: Analyzing trace with hash 2036122121, now seen corresponding path program 2 times [2023-11-19 07:54:08,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:54:08,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842526697] [2023-11-19 07:54:08,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:08,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:54:09,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:09,268 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:54:09,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:54:09,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842526697] [2023-11-19 07:54:09,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842526697] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:54:09,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30234520] [2023-11-19 07:54:09,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:54:09,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:54:09,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3136ed-9764-48d8-8a68-458f441ae588/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:54:09,271 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3136ed-9764-48d8-8a68-458f441ae588/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:54:09,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3136ed-9764-48d8-8a68-458f441ae588/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:54:09,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:54:09,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:54:09,422 INFO L262 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 07:54:09,425 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:54:09,601 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 07:54:09,601 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:54:09,658 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 07:54:09,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30234520] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:54:09,659 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:54:09,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 9 [2023-11-19 07:54:09,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375998727] [2023-11-19 07:54:09,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:54:09,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-19 07:54:09,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:54:09,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-19 07:54:09,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2023-11-19 07:54:09,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 425 [2023-11-19 07:54:09,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 41 transitions, 142 flow. Second operand has 10 states, 10 states have (on average 186.4) internal successors, (1864), 10 states have internal predecessors, (1864), 0 states have call successors, (0), 0 states 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 07:54:09,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:54:09,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 425 [2023-11-19 07:54:09,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:54:12,230 INFO L124 PetriNetUnfolderBase]: 10969/13893 cut-off events. [2023-11-19 07:54:12,230 INFO L125 PetriNetUnfolderBase]: For 4262/4262 co-relation queries the response was YES. [2023-11-19 07:54:12,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35295 conditions, 13893 events. 10969/13893 cut-off events. For 4262/4262 co-relation queries the response was YES. Maximal size of possible extension queue 684. Compared 62626 event pairs, 339 based on Foata normal form. 3/13886 useless extension candidates. Maximal degree in co-relation 35265. Up to 4971 conditions per place. [2023-11-19 07:54:12,377 INFO L140 encePairwiseOnDemand]: 417/425 looper letters, 129 selfloop transitions, 21 changer transitions 4/158 dead transitions. [2023-11-19 07:54:12,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 158 transitions, 801 flow [2023-11-19 07:54:12,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-19 07:54:12,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-19 07:54:12,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1933 transitions. [2023-11-19 07:54:12,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4548235294117647 [2023-11-19 07:54:12,386 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1933 transitions. [2023-11-19 07:54:12,387 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1933 transitions. [2023-11-19 07:54:12,388 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:54:12,389 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1933 transitions. [2023-11-19 07:54:12,395 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 193.3) internal successors, (1933), 10 states have internal predecessors, (1933), 0 states have call successors, (0), 0 states 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 07:54:12,406 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 425.0) internal successors, (4675), 11 states have internal predecessors, (4675), 0 states have call successors, (0), 0 states 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 07:54:12,408 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 425.0) internal successors, (4675), 11 states have internal predecessors, (4675), 0 states have call successors, (0), 0 states 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 07:54:12,408 INFO L175 Difference]: Start difference. First operand has 51 places, 41 transitions, 142 flow. Second operand 10 states and 1933 transitions. [2023-11-19 07:54:12,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 158 transitions, 801 flow [2023-11-19 07:54:12,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 158 transitions, 789 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-19 07:54:12,416 INFO L231 Difference]: Finished difference. Result has 60 places, 58 transitions, 304 flow [2023-11-19 07:54:12,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=425, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=304, PETRI_PLACES=60, PETRI_TRANSITIONS=58} [2023-11-19 07:54:12,419 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 17 predicate places. [2023-11-19 07:54:12,419 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 58 transitions, 304 flow [2023-11-19 07:54:12,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 186.4) internal successors, (1864), 10 states have internal predecessors, (1864), 0 states have call successors, (0), 0 states 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 07:54:12,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:54:12,421 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:54:12,444 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3136ed-9764-48d8-8a68-458f441ae588/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:54:12,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3136ed-9764-48d8-8a68-458f441ae588/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:54:12,637 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 07:54:12,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:54:12,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1915066236, now seen corresponding path program 1 times [2023-11-19 07:54:12,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:54:12,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189815954] [2023-11-19 07:54:12,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:12,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:54:12,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:14,436 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:54:14,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:54:14,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189815954] [2023-11-19 07:54:14,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189815954] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:54:14,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286084329] [2023-11-19 07:54:14,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:14,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:54:14,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3136ed-9764-48d8-8a68-458f441ae588/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:54:14,441 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3136ed-9764-48d8-8a68-458f441ae588/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:54:14,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3136ed-9764-48d8-8a68-458f441ae588/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:54:14,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:14,601 INFO L262 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-19 07:54:14,604 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:54:14,945 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2023-11-19 07:54:15,010 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:54:15,010 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:54:15,189 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-19 07:54:15,189 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2023-11-19 07:54:15,247 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 07:54:15,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286084329] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:54:15,248 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:54:15,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 5] total 22 [2023-11-19 07:54:15,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221215230] [2023-11-19 07:54:15,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:54:15,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-19 07:54:15,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:54:15,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-19 07:54:15,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2023-11-19 07:54:16,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 425 [2023-11-19 07:54:16,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 58 transitions, 304 flow. Second operand has 23 states, 23 states have (on average 162.56521739130434) internal successors, (3739), 23 states have internal predecessors, (3739), 0 states have call successors, (0), 0 states 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 07:54:16,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:54:16,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 425 [2023-11-19 07:54:16,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:54:21,362 INFO L124 PetriNetUnfolderBase]: 19201/24758 cut-off events. [2023-11-19 07:54:21,363 INFO L125 PetriNetUnfolderBase]: For 42844/42856 co-relation queries the response was YES. [2023-11-19 07:54:21,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79790 conditions, 24758 events. 19201/24758 cut-off events. For 42844/42856 co-relation queries the response was YES. Maximal size of possible extension queue 1177. Compared 126474 event pairs, 1249 based on Foata normal form. 4/24752 useless extension candidates. Maximal degree in co-relation 79755. Up to 16151 conditions per place. [2023-11-19 07:54:21,558 INFO L140 encePairwiseOnDemand]: 411/425 looper letters, 292 selfloop transitions, 220 changer transitions 5/521 dead transitions. [2023-11-19 07:54:21,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 521 transitions, 3323 flow [2023-11-19 07:54:21,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-19 07:54:21,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-19 07:54:21,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 5049 transitions. [2023-11-19 07:54:21,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4096551724137931 [2023-11-19 07:54:21,578 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 5049 transitions. [2023-11-19 07:54:21,578 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 5049 transitions. [2023-11-19 07:54:21,582 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:54:21,582 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 5049 transitions. [2023-11-19 07:54:21,596 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 174.10344827586206) internal successors, (5049), 29 states have internal predecessors, (5049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:21,620 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 425.0) internal successors, (12750), 30 states have internal predecessors, (12750), 0 states have call successors, (0), 0 states 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 07:54:21,626 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 425.0) internal successors, (12750), 30 states have internal predecessors, (12750), 0 states have call successors, (0), 0 states 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 07:54:21,626 INFO L175 Difference]: Start difference. First operand has 60 places, 58 transitions, 304 flow. Second operand 29 states and 5049 transitions. [2023-11-19 07:54:21,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 521 transitions, 3323 flow [2023-11-19 07:54:21,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 521 transitions, 3087 flow, removed 116 selfloop flow, removed 3 redundant places. [2023-11-19 07:54:21,877 INFO L231 Difference]: Finished difference. Result has 88 places, 289 transitions, 2175 flow [2023-11-19 07:54:21,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=425, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=2175, PETRI_PLACES=88, PETRI_TRANSITIONS=289} [2023-11-19 07:54:21,878 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 45 predicate places. [2023-11-19 07:54:21,878 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 289 transitions, 2175 flow [2023-11-19 07:54:21,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 162.56521739130434) internal successors, (3739), 23 states have internal predecessors, (3739), 0 states have call successors, (0), 0 states 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 07:54:21,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:54:21,880 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:54:21,896 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3136ed-9764-48d8-8a68-458f441ae588/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:54:22,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3136ed-9764-48d8-8a68-458f441ae588/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-19 07:54:22,084 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 07:54:22,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:54:22,085 INFO L85 PathProgramCache]: Analyzing trace with hash 2121580679, now seen corresponding path program 1 times [2023-11-19 07:54:22,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:54:22,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129654249] [2023-11-19 07:54:22,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:22,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:54:22,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:22,856 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 07:54:22,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:54:22,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129654249] [2023-11-19 07:54:22,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129654249] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:54:22,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693125443] [2023-11-19 07:54:22,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:22,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:54:22,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3136ed-9764-48d8-8a68-458f441ae588/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:54:22,859 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3136ed-9764-48d8-8a68-458f441ae588/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:54:22,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3136ed-9764-48d8-8a68-458f441ae588/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:54:23,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:23,021 INFO L262 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-19 07:54:23,024 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:54:23,239 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2023-11-19 07:54:23,324 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:54:23,325 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:54:23,537 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 07:54:23,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693125443] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:54:23,537 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:54:23,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 17 [2023-11-19 07:54:23,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535226408] [2023-11-19 07:54:23,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:54:23,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-19 07:54:23,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:54:23,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-19 07:54:23,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2023-11-19 07:54:24,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 425 [2023-11-19 07:54:24,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 289 transitions, 2175 flow. Second operand has 18 states, 18 states have (on average 173.5) internal successors, (3123), 18 states have internal predecessors, (3123), 0 states have call successors, (0), 0 states 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 07:54:24,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:54:24,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 425 [2023-11-19 07:54:24,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:54:29,780 INFO L124 PetriNetUnfolderBase]: 25254/32711 cut-off events. [2023-11-19 07:54:29,780 INFO L125 PetriNetUnfolderBase]: For 68123/68163 co-relation queries the response was YES. [2023-11-19 07:54:29,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116682 conditions, 32711 events. 25254/32711 cut-off events. For 68123/68163 co-relation queries the response was YES. Maximal size of possible extension queue 1568. Compared 175114 event pairs, 1741 based on Foata normal form. 24/32725 useless extension candidates. Maximal degree in co-relation 116642. Up to 22840 conditions per place. [2023-11-19 07:54:30,060 INFO L140 encePairwiseOnDemand]: 411/425 looper letters, 431 selfloop transitions, 289 changer transitions 5/729 dead transitions. [2023-11-19 07:54:30,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 729 transitions, 5810 flow [2023-11-19 07:54:30,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-19 07:54:30,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-19 07:54:30,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 4823 transitions. [2023-11-19 07:54:30,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4364705882352941 [2023-11-19 07:54:30,080 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 4823 transitions. [2023-11-19 07:54:30,080 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 4823 transitions. [2023-11-19 07:54:30,084 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:54:30,084 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 4823 transitions. [2023-11-19 07:54:30,104 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 185.5) internal successors, (4823), 26 states have internal predecessors, (4823), 0 states have call successors, (0), 0 states 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 07:54:30,126 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 425.0) internal successors, (11475), 27 states have internal predecessors, (11475), 0 states have call successors, (0), 0 states 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 07:54:30,130 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 425.0) internal successors, (11475), 27 states have internal predecessors, (11475), 0 states have call successors, (0), 0 states 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 07:54:30,130 INFO L175 Difference]: Start difference. First operand has 88 places, 289 transitions, 2175 flow. Second operand 26 states and 4823 transitions. [2023-11-19 07:54:30,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 729 transitions, 5810 flow