./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 0e0057cc 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_df829ee9-fabe-4d64-a935-83a0bd807da9/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df829ee9-fabe-4d64-a935-83a0bd807da9/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df829ee9-fabe-4d64-a935-83a0bd807da9/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df829ee9-fabe-4d64-a935-83a0bd807da9/bin/uautomizer-verify-BQ2R08f2Ya/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_df829ee9-fabe-4d64-a935-83a0bd807da9/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df829ee9-fabe-4d64-a935-83a0bd807da9/bin/uautomizer-verify-BQ2R08f2Ya --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 0.2.4-dev-0e0057c [2023-11-28 23:55:36,559 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-28 23:55:36,617 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df829ee9-fabe-4d64-a935-83a0bd807da9/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-28 23:55:36,621 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-28 23:55:36,622 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-28 23:55:36,643 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-28 23:55:36,643 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-28 23:55:36,644 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-28 23:55:36,644 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-28 23:55:36,645 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-28 23:55:36,645 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-28 23:55:36,646 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-28 23:55:36,646 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-28 23:55:36,647 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-28 23:55:36,647 INFO L153 SettingsManager]: * Use SBE=true [2023-11-28 23:55:36,648 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-28 23:55:36,648 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-28 23:55:36,649 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-28 23:55:36,649 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-28 23:55:36,650 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-28 23:55:36,650 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-28 23:55:36,651 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-28 23:55:36,651 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-28 23:55:36,652 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-28 23:55:36,652 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-28 23:55:36,653 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-28 23:55:36,653 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-28 23:55:36,653 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-28 23:55:36,654 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-28 23:55:36,654 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-28 23:55:36,655 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-28 23:55:36,655 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 23:55:36,655 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-28 23:55:36,656 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-28 23:55:36,656 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-28 23:55:36,656 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-28 23:55:36,656 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-28 23:55:36,656 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-28 23:55:36,656 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-28 23:55:36,656 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-28 23:55:36,657 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-28 23:55:36,657 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-28 23:55:36,657 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_df829ee9-fabe-4d64-a935-83a0bd807da9/bin/uautomizer-verify-BQ2R08f2Ya/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df829ee9-fabe-4d64-a935-83a0bd807da9/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b1e99af7c76570461a4b0ac70d664412f250ec04f47fd9ca8c0f85236f1348c6 [2023-11-28 23:55:36,878 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-28 23:55:36,899 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-28 23:55:36,901 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-28 23:55:36,902 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-28 23:55:36,903 INFO L274 PluginConnector]: CDTParser initialized [2023-11-28 23:55:36,904 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df829ee9-fabe-4d64-a935-83a0bd807da9/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/parallel-parallel-sum-1.wvr.c [2023-11-28 23:55:39,651 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-28 23:55:39,815 INFO L384 CDTParser]: Found 1 translation units. [2023-11-28 23:55:39,816 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df829ee9-fabe-4d64-a935-83a0bd807da9/sv-benchmarks/c/weaver/parallel-parallel-sum-1.wvr.c [2023-11-28 23:55:39,823 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df829ee9-fabe-4d64-a935-83a0bd807da9/bin/uautomizer-verify-BQ2R08f2Ya/data/f12b9f6f5/244d0329531248d1a4ae1bbc5380c7b8/FLAG145eb7326 [2023-11-28 23:55:39,837 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df829ee9-fabe-4d64-a935-83a0bd807da9/bin/uautomizer-verify-BQ2R08f2Ya/data/f12b9f6f5/244d0329531248d1a4ae1bbc5380c7b8 [2023-11-28 23:55:39,839 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-28 23:55:39,840 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-28 23:55:39,841 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-28 23:55:39,841 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-28 23:55:39,845 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-28 23:55:39,846 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 11:55:39" (1/1) ... [2023-11-28 23:55:39,846 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50d7b9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:55:39, skipping insertion in model container [2023-11-28 23:55:39,847 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 11:55:39" (1/1) ... [2023-11-28 23:55:39,876 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-28 23:55:40,041 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_df829ee9-fabe-4d64-a935-83a0bd807da9/sv-benchmarks/c/weaver/parallel-parallel-sum-1.wvr.c[3694,3707] [2023-11-28 23:55:40,053 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 23:55:40,062 INFO L202 MainTranslator]: Completed pre-run [2023-11-28 23:55:40,091 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_df829ee9-fabe-4d64-a935-83a0bd807da9/sv-benchmarks/c/weaver/parallel-parallel-sum-1.wvr.c[3694,3707] [2023-11-28 23:55:40,097 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 23:55:40,106 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-28 23:55:40,106 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-28 23:55:40,114 INFO L206 MainTranslator]: Completed translation [2023-11-28 23:55:40,114 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:55:40 WrapperNode [2023-11-28 23:55:40,114 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-28 23:55:40,115 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-28 23:55:40,115 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-28 23:55:40,116 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-28 23:55:40,122 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:55:40" (1/1) ... [2023-11-28 23:55:40,132 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:55:40" (1/1) ... [2023-11-28 23:55:40,166 INFO L138 Inliner]: procedures = 27, calls = 68, calls flagged for inlining = 18, calls inlined = 24, statements flattened = 315 [2023-11-28 23:55:40,166 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-28 23:55:40,167 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-28 23:55:40,167 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-28 23:55:40,167 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-28 23:55:40,178 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:55:40" (1/1) ... [2023-11-28 23:55:40,179 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:55:40" (1/1) ... [2023-11-28 23:55:40,183 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:55:40" (1/1) ... [2023-11-28 23:55:40,202 INFO L175 MemorySlicer]: Split 15 memory accesses to 6 slices as follows [2, 2, 2, 2, 2, 5]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0, 0]. The 5 writes are split as follows [0, 1, 1, 1, 1, 1]. [2023-11-28 23:55:40,202 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:55:40" (1/1) ... [2023-11-28 23:55:40,203 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:55:40" (1/1) ... [2023-11-28 23:55:40,215 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:55:40" (1/1) ... [2023-11-28 23:55:40,220 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:55:40" (1/1) ... [2023-11-28 23:55:40,223 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:55:40" (1/1) ... [2023-11-28 23:55:40,226 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:55:40" (1/1) ... [2023-11-28 23:55:40,231 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-28 23:55:40,232 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-28 23:55:40,232 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-28 23:55:40,232 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-28 23:55:40,233 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:55:40" (1/1) ... [2023-11-28 23:55:40,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 23:55:40,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df829ee9-fabe-4d64-a935-83a0bd807da9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:55:40,263 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df829ee9-fabe-4d64-a935-83a0bd807da9/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-28 23:55:40,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df829ee9-fabe-4d64-a935-83a0bd807da9/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-28 23:55:40,295 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-28 23:55:40,295 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-28 23:55:40,296 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-28 23:55:40,296 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-28 23:55:40,296 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-28 23:55:40,296 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-28 23:55:40,296 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-28 23:55:40,297 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2023-11-28 23:55:40,297 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-28 23:55:40,297 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-28 23:55:40,297 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-28 23:55:40,297 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-28 23:55:40,297 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-28 23:55:40,297 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2023-11-28 23:55:40,298 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-28 23:55:40,298 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-28 23:55:40,298 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-28 23:55:40,298 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-28 23:55:40,298 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-28 23:55:40,298 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-28 23:55:40,299 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-11-28 23:55:40,299 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-11-28 23:55:40,299 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-28 23:55:40,299 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-28 23:55:40,299 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-28 23:55:40,299 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-28 23:55:40,300 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-28 23:55:40,300 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2023-11-28 23:55:40,300 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-28 23:55:40,300 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-28 23:55:40,300 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-28 23:55:40,300 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-28 23:55:40,300 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-28 23:55:40,301 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-28 23:55:40,302 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-28 23:55:40,422 INFO L241 CfgBuilder]: Building ICFG [2023-11-28 23:55:40,424 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-28 23:55:40,808 INFO L282 CfgBuilder]: Performing block encoding [2023-11-28 23:55:41,132 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-28 23:55:41,133 INFO L309 CfgBuilder]: Removed 5 assume(true) statements. [2023-11-28 23:55:41,133 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 11:55:41 BoogieIcfgContainer [2023-11-28 23:55:41,133 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-28 23:55:41,135 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-28 23:55:41,135 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-28 23:55:41,138 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-28 23:55:41,138 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 11:55:39" (1/3) ... [2023-11-28 23:55:41,138 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2539f3e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 11:55:41, skipping insertion in model container [2023-11-28 23:55:41,138 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:55:40" (2/3) ... [2023-11-28 23:55:41,139 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2539f3e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 11:55:41, skipping insertion in model container [2023-11-28 23:55:41,139 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 11:55:41" (3/3) ... [2023-11-28 23:55:41,140 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-parallel-sum-1.wvr.c [2023-11-28 23:55:41,148 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-28 23:55:41,155 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-28 23:55:41,156 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-28 23:55:41,156 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-28 23:55:41,209 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-28 23:55:41,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 61 places, 57 transitions, 142 flow [2023-11-28 23:55:41,267 INFO L124 PetriNetUnfolderBase]: 9/53 cut-off events. [2023-11-28 23:55:41,267 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-28 23:55:41,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70 conditions, 53 events. 9/53 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 92 event pairs, 0 based on Foata normal form. 0/43 useless extension candidates. Maximal degree in co-relation 45. Up to 2 conditions per place. [2023-11-28 23:55:41,270 INFO L82 GeneralOperation]: Start removeDead. Operand has 61 places, 57 transitions, 142 flow [2023-11-28 23:55:41,274 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 56 places, 52 transitions, 128 flow [2023-11-28 23:55:41,284 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-28 23:55:41,289 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;@4b99c50a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-28 23:55:41,289 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-28 23:55:41,307 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-28 23:55:41,307 INFO L124 PetriNetUnfolderBase]: 9/51 cut-off events. [2023-11-28 23:55:41,307 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-28 23:55:41,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:55:41,308 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:55:41,308 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)] === [2023-11-28 23:55:41,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:55:41,312 INFO L85 PathProgramCache]: Analyzing trace with hash 891167991, now seen corresponding path program 1 times [2023-11-28 23:55:41,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:55:41,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372610871] [2023-11-28 23:55:41,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:55:41,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:55:41,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:55:41,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:55:41,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:55:41,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372610871] [2023-11-28 23:55:41,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372610871] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:55:41,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:55:41,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-28 23:55:41,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125949484] [2023-11-28 23:55:41,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:55:41,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-28 23:55:41,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:55:41,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-28 23:55:41,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-28 23:55:41,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 57 [2023-11-28 23:55:41,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 52 transitions, 128 flow. Second operand has 2 states, 2 states have (on average 26.0) internal successors, (52), 2 states have internal predecessors, (52), 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) [2023-11-28 23:55:41,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:55:41,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 57 [2023-11-28 23:55:41,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:55:43,544 INFO L124 PetriNetUnfolderBase]: 13641/18118 cut-off events. [2023-11-28 23:55:43,544 INFO L125 PetriNetUnfolderBase]: For 784/784 co-relation queries the response was YES. [2023-11-28 23:55:43,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36067 conditions, 18118 events. 13641/18118 cut-off events. For 784/784 co-relation queries the response was YES. Maximal size of possible extension queue 1015. Compared 99797 event pairs, 9349 based on Foata normal form. 4121/17688 useless extension candidates. Maximal degree in co-relation 31367. Up to 17167 conditions per place. [2023-11-28 23:55:43,722 INFO L140 encePairwiseOnDemand]: 53/57 looper letters, 39 selfloop transitions, 0 changer transitions 0/48 dead transitions. [2023-11-28 23:55:43,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 48 transitions, 198 flow [2023-11-28 23:55:43,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-28 23:55:43,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-28 23:55:43,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 69 transitions. [2023-11-28 23:55:43,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6052631578947368 [2023-11-28 23:55:43,735 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 69 transitions. [2023-11-28 23:55:43,736 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 69 transitions. [2023-11-28 23:55:43,737 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:55:43,739 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 69 transitions. [2023-11-28 23:55:43,741 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 34.5) internal successors, (69), 2 states have internal predecessors, (69), 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) [2023-11-28 23:55:43,744 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 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) [2023-11-28 23:55:43,745 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 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) [2023-11-28 23:55:43,746 INFO L175 Difference]: Start difference. First operand has 56 places, 52 transitions, 128 flow. Second operand 2 states and 69 transitions. [2023-11-28 23:55:43,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 48 transitions, 198 flow [2023-11-28 23:55:43,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 48 transitions, 182 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-11-28 23:55:43,798 INFO L231 Difference]: Finished difference. Result has 49 places, 48 transitions, 104 flow [2023-11-28 23:55:43,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=104, PETRI_PLACES=49, PETRI_TRANSITIONS=48} [2023-11-28 23:55:43,804 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -7 predicate places. [2023-11-28 23:55:43,804 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 48 transitions, 104 flow [2023-11-28 23:55:43,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 26.0) internal successors, (52), 2 states have internal predecessors, (52), 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) [2023-11-28 23:55:43,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:55:43,805 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:55:43,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-28 23:55:43,806 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)] === [2023-11-28 23:55:43,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:55:43,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1061580763, now seen corresponding path program 1 times [2023-11-28 23:55:43,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:55:43,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772416686] [2023-11-28 23:55:43,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:55:43,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:55:43,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:55:44,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:55:44,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:55:44,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772416686] [2023-11-28 23:55:44,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772416686] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:55:44,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:55:44,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 23:55:44,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910985252] [2023-11-28 23:55:44,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:55:44,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 23:55:44,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:55:44,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 23:55:44,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 23:55:44,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 57 [2023-11-28 23:55:44,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 48 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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) [2023-11-28 23:55:44,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:55:44,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 57 [2023-11-28 23:55:44,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:55:46,045 INFO L124 PetriNetUnfolderBase]: 20246/27668 cut-off events. [2023-11-28 23:55:46,046 INFO L125 PetriNetUnfolderBase]: For 183/183 co-relation queries the response was YES. [2023-11-28 23:55:46,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53819 conditions, 27668 events. 20246/27668 cut-off events. For 183/183 co-relation queries the response was YES. Maximal size of possible extension queue 1634. Compared 176147 event pairs, 4800 based on Foata normal form. 1/21636 useless extension candidates. Maximal degree in co-relation 53816. Up to 19114 conditions per place. [2023-11-28 23:55:46,165 INFO L140 encePairwiseOnDemand]: 51/57 looper letters, 67 selfloop transitions, 5 changer transitions 1/82 dead transitions. [2023-11-28 23:55:46,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 82 transitions, 325 flow [2023-11-28 23:55:46,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 23:55:46,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-28 23:55:46,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 113 transitions. [2023-11-28 23:55:46,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6608187134502924 [2023-11-28 23:55:46,168 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 113 transitions. [2023-11-28 23:55:46,168 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 113 transitions. [2023-11-28 23:55:46,169 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:55:46,169 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 113 transitions. [2023-11-28 23:55:46,170 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 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) [2023-11-28 23:55:46,171 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 57.0) internal successors, (228), 4 states have internal predecessors, (228), 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) [2023-11-28 23:55:46,172 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 57.0) internal successors, (228), 4 states have internal predecessors, (228), 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) [2023-11-28 23:55:46,172 INFO L175 Difference]: Start difference. First operand has 49 places, 48 transitions, 104 flow. Second operand 3 states and 113 transitions. [2023-11-28 23:55:46,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 82 transitions, 325 flow [2023-11-28 23:55:46,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 82 transitions, 325 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-28 23:55:46,176 INFO L231 Difference]: Finished difference. Result has 52 places, 52 transitions, 137 flow [2023-11-28 23:55:46,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=137, PETRI_PLACES=52, PETRI_TRANSITIONS=52} [2023-11-28 23:55:46,177 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -4 predicate places. [2023-11-28 23:55:46,177 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 52 transitions, 137 flow [2023-11-28 23:55:46,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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) [2023-11-28 23:55:46,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:55:46,178 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:55:46,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-28 23:55:46,178 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)] === [2023-11-28 23:55:46,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:55:46,179 INFO L85 PathProgramCache]: Analyzing trace with hash 41150719, now seen corresponding path program 1 times [2023-11-28 23:55:46,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:55:46,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151655699] [2023-11-28 23:55:46,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:55:46,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:55:46,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:55:46,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:55:46,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:55:46,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151655699] [2023-11-28 23:55:46,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151655699] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:55:46,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:55:46,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 23:55:46,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844307484] [2023-11-28 23:55:46,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:55:46,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 23:55:46,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:55:46,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 23:55:46,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-28 23:55:46,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 57 [2023-11-28 23:55:46,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 52 transitions, 137 flow. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 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) [2023-11-28 23:55:46,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:55:46,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 57 [2023-11-28 23:55:46,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:55:48,938 INFO L124 PetriNetUnfolderBase]: 28465/38461 cut-off events. [2023-11-28 23:55:48,938 INFO L125 PetriNetUnfolderBase]: For 2719/2719 co-relation queries the response was YES. [2023-11-28 23:55:48,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82164 conditions, 38461 events. 28465/38461 cut-off events. For 2719/2719 co-relation queries the response was YES. Maximal size of possible extension queue 2280. Compared 249683 event pairs, 21088 based on Foata normal form. 1259/30979 useless extension candidates. Maximal degree in co-relation 82159. Up to 25263 conditions per place. [2023-11-28 23:55:49,074 INFO L140 encePairwiseOnDemand]: 51/57 looper letters, 42 selfloop transitions, 2 changer transitions 34/87 dead transitions. [2023-11-28 23:55:49,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 87 transitions, 384 flow [2023-11-28 23:55:49,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 23:55:49,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-28 23:55:49,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 127 transitions. [2023-11-28 23:55:49,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5570175438596491 [2023-11-28 23:55:49,077 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 127 transitions. [2023-11-28 23:55:49,077 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 127 transitions. [2023-11-28 23:55:49,078 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:55:49,078 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 127 transitions. [2023-11-28 23:55:49,079 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 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) [2023-11-28 23:55:49,080 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 57.0) internal successors, (285), 5 states have internal predecessors, (285), 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) [2023-11-28 23:55:49,081 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 57.0) internal successors, (285), 5 states have internal predecessors, (285), 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) [2023-11-28 23:55:49,081 INFO L175 Difference]: Start difference. First operand has 52 places, 52 transitions, 137 flow. Second operand 4 states and 127 transitions. [2023-11-28 23:55:49,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 87 transitions, 384 flow [2023-11-28 23:55:49,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 87 transitions, 376 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-28 23:55:49,085 INFO L231 Difference]: Finished difference. Result has 56 places, 53 transitions, 150 flow [2023-11-28 23:55:49,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=150, PETRI_PLACES=56, PETRI_TRANSITIONS=53} [2023-11-28 23:55:49,086 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 0 predicate places. [2023-11-28 23:55:49,086 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 53 transitions, 150 flow [2023-11-28 23:55:49,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 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) [2023-11-28 23:55:49,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:55:49,087 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:55:49,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-28 23:55:49,088 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)] === [2023-11-28 23:55:49,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:55:49,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1624964549, now seen corresponding path program 1 times [2023-11-28 23:55:49,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:55:49,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213282816] [2023-11-28 23:55:49,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:55:49,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:55:49,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:55:49,236 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:55:49,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:55:49,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213282816] [2023-11-28 23:55:49,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213282816] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:55:49,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566879613] [2023-11-28 23:55:49,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:55:49,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:55:49,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df829ee9-fabe-4d64-a935-83a0bd807da9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:55:49,240 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df829ee9-fabe-4d64-a935-83a0bd807da9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:55:49,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df829ee9-fabe-4d64-a935-83a0bd807da9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-28 23:55:49,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:55:49,410 INFO L262 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-28 23:55:49,416 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:55:49,535 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:55:49,536 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:55:49,595 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:55:49,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566879613] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:55:49,595 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:55:49,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2023-11-28 23:55:49,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284775606] [2023-11-28 23:55:49,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:55:49,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-28 23:55:49,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:55:49,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-28 23:55:49,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-11-28 23:55:49,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 57 [2023-11-28 23:55:49,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 53 transitions, 150 flow. Second operand has 10 states, 10 states have (on average 17.3) internal successors, (173), 10 states have internal predecessors, (173), 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) [2023-11-28 23:55:49,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:55:49,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 57 [2023-11-28 23:55:49,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:55:52,449 INFO L124 PetriNetUnfolderBase]: 28465/38464 cut-off events. [2023-11-28 23:55:52,450 INFO L125 PetriNetUnfolderBase]: For 5660/5660 co-relation queries the response was YES. [2023-11-28 23:55:52,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82131 conditions, 38464 events. 28465/38464 cut-off events. For 5660/5660 co-relation queries the response was YES. Maximal size of possible extension queue 2280. Compared 249736 event pairs, 21088 based on Foata normal form. 1258/30981 useless extension candidates. Maximal degree in co-relation 82124. Up to 25262 conditions per place. [2023-11-28 23:55:52,604 INFO L140 encePairwiseOnDemand]: 51/57 looper letters, 73 selfloop transitions, 5 changer transitions 2/89 dead transitions. [2023-11-28 23:55:52,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 89 transitions, 408 flow [2023-11-28 23:55:52,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-28 23:55:52,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-28 23:55:52,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2023-11-28 23:55:52,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4502923976608187 [2023-11-28 23:55:52,606 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 154 transitions. [2023-11-28 23:55:52,606 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 154 transitions. [2023-11-28 23:55:52,606 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:55:52,606 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 154 transitions. [2023-11-28 23:55:52,607 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 25.666666666666668) internal successors, (154), 6 states have internal predecessors, (154), 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) [2023-11-28 23:55:52,608 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 57.0) internal successors, (399), 7 states have internal predecessors, (399), 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) [2023-11-28 23:55:52,608 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 57.0) internal successors, (399), 7 states have internal predecessors, (399), 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) [2023-11-28 23:55:52,608 INFO L175 Difference]: Start difference. First operand has 56 places, 53 transitions, 150 flow. Second operand 6 states and 154 transitions. [2023-11-28 23:55:52,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 89 transitions, 408 flow [2023-11-28 23:55:52,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 89 transitions, 400 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-11-28 23:55:52,614 INFO L231 Difference]: Finished difference. Result has 62 places, 56 transitions, 185 flow [2023-11-28 23:55:52,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=185, PETRI_PLACES=62, PETRI_TRANSITIONS=56} [2023-11-28 23:55:52,614 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 6 predicate places. [2023-11-28 23:55:52,615 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 56 transitions, 185 flow [2023-11-28 23:55:52,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.3) internal successors, (173), 10 states have internal predecessors, (173), 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) [2023-11-28 23:55:52,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:55:52,615 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:55:52,625 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df829ee9-fabe-4d64-a935-83a0bd807da9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-28 23:55:52,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df829ee9-fabe-4d64-a935-83a0bd807da9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:55:52,816 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)] === [2023-11-28 23:55:52,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:55:52,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1832101309, now seen corresponding path program 1 times [2023-11-28 23:55:52,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:55:52,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725928371] [2023-11-28 23:55:52,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:55:52,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:55:52,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:55:52,993 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:55:52,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:55:52,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725928371] [2023-11-28 23:55:52,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725928371] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:55:52,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773294248] [2023-11-28 23:55:52,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:55:52,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:55:52,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df829ee9-fabe-4d64-a935-83a0bd807da9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:55:52,996 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df829ee9-fabe-4d64-a935-83a0bd807da9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:55:53,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df829ee9-fabe-4d64-a935-83a0bd807da9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-28 23:55:53,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:55:53,140 INFO L262 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-28 23:55:53,143 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:55:53,386 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-28 23:55:53,386 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:55:53,472 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-28 23:55:53,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773294248] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:55:53,472 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:55:53,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2023-11-28 23:55:53,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048729560] [2023-11-28 23:55:53,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:55:53,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-28 23:55:53,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:55:53,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-28 23:55:53,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-28 23:55:53,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 57 [2023-11-28 23:55:53,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 56 transitions, 185 flow. Second operand has 9 states, 9 states have (on average 22.77777777777778) internal successors, (205), 9 states have internal predecessors, (205), 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) [2023-11-28 23:55:53,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:55:53,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 57 [2023-11-28 23:55:53,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:55:59,110 INFO L124 PetriNetUnfolderBase]: 57808/77920 cut-off events. [2023-11-28 23:55:59,110 INFO L125 PetriNetUnfolderBase]: For 16000/16000 co-relation queries the response was YES. [2023-11-28 23:55:59,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171508 conditions, 77920 events. 57808/77920 cut-off events. For 16000/16000 co-relation queries the response was YES. Maximal size of possible extension queue 3722. Compared 530425 event pairs, 4694 based on Foata normal form. 373/61096 useless extension candidates. Maximal degree in co-relation 171499. Up to 20569 conditions per place. [2023-11-28 23:55:59,504 INFO L140 encePairwiseOnDemand]: 49/57 looper letters, 168 selfloop transitions, 22 changer transitions 44/243 dead transitions. [2023-11-28 23:55:59,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 243 transitions, 1149 flow [2023-11-28 23:55:59,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-28 23:55:59,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-28 23:55:59,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 368 transitions. [2023-11-28 23:55:59,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5869218500797448 [2023-11-28 23:55:59,508 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 368 transitions. [2023-11-28 23:55:59,508 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 368 transitions. [2023-11-28 23:55:59,509 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:55:59,509 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 368 transitions. [2023-11-28 23:55:59,511 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 33.45454545454545) internal successors, (368), 11 states have internal predecessors, (368), 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) [2023-11-28 23:55:59,514 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 57.0) internal successors, (684), 12 states have internal predecessors, (684), 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) [2023-11-28 23:55:59,514 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 57.0) internal successors, (684), 12 states have internal predecessors, (684), 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) [2023-11-28 23:55:59,514 INFO L175 Difference]: Start difference. First operand has 62 places, 56 transitions, 185 flow. Second operand 11 states and 368 transitions. [2023-11-28 23:55:59,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 243 transitions, 1149 flow [2023-11-28 23:55:59,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 243 transitions, 1113 flow, removed 15 selfloop flow, removed 3 redundant places. [2023-11-28 23:55:59,531 INFO L231 Difference]: Finished difference. Result has 73 places, 71 transitions, 298 flow [2023-11-28 23:55:59,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=298, PETRI_PLACES=73, PETRI_TRANSITIONS=71} [2023-11-28 23:55:59,532 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 17 predicate places. [2023-11-28 23:55:59,532 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 71 transitions, 298 flow [2023-11-28 23:55:59,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 22.77777777777778) internal successors, (205), 9 states have internal predecessors, (205), 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) [2023-11-28 23:55:59,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:55:59,533 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:55:59,538 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df829ee9-fabe-4d64-a935-83a0bd807da9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-28 23:55:59,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df829ee9-fabe-4d64-a935-83a0bd807da9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:55:59,737 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)] === [2023-11-28 23:55:59,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:55:59,737 INFO L85 PathProgramCache]: Analyzing trace with hash 174290093, now seen corresponding path program 2 times [2023-11-28 23:55:59,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:55:59,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563457016] [2023-11-28 23:55:59,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:55:59,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:55:59,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:55:59,937 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-28 23:55:59,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:55:59,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563457016] [2023-11-28 23:55:59,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563457016] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:55:59,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:55:59,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-28 23:55:59,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859278158] [2023-11-28 23:55:59,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:55:59,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-28 23:55:59,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:55:59,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-28 23:55:59,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-28 23:55:59,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 57 [2023-11-28 23:55:59,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 71 transitions, 298 flow. Second operand has 5 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 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) [2023-11-28 23:55:59,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:55:59,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 57 [2023-11-28 23:55:59,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:56:09,197 INFO L124 PetriNetUnfolderBase]: 94033/125482 cut-off events. [2023-11-28 23:56:09,198 INFO L125 PetriNetUnfolderBase]: For 83845/83845 co-relation queries the response was YES. [2023-11-28 23:56:09,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 307952 conditions, 125482 events. 94033/125482 cut-off events. For 83845/83845 co-relation queries the response was YES. Maximal size of possible extension queue 5843. Compared 879212 event pairs, 16581 based on Foata normal form. 2/97557 useless extension candidates. Maximal degree in co-relation 307939. Up to 59916 conditions per place. [2023-11-28 23:56:09,966 INFO L140 encePairwiseOnDemand]: 51/57 looper letters, 148 selfloop transitions, 21 changer transitions 2/180 dead transitions. [2023-11-28 23:56:09,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 180 transitions, 999 flow [2023-11-28 23:56:09,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-28 23:56:09,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-28 23:56:09,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 205 transitions. [2023-11-28 23:56:09,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7192982456140351 [2023-11-28 23:56:09,968 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 205 transitions. [2023-11-28 23:56:09,968 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 205 transitions. [2023-11-28 23:56:09,969 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:56:09,969 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 205 transitions. [2023-11-28 23:56:09,970 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 41.0) internal successors, (205), 5 states have internal predecessors, (205), 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) [2023-11-28 23:56:09,970 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 57.0) internal successors, (342), 6 states have internal predecessors, (342), 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) [2023-11-28 23:56:09,971 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 57.0) internal successors, (342), 6 states have internal predecessors, (342), 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) [2023-11-28 23:56:09,971 INFO L175 Difference]: Start difference. First operand has 73 places, 71 transitions, 298 flow. Second operand 5 states and 205 transitions. [2023-11-28 23:56:09,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 180 transitions, 999 flow [2023-11-28 23:56:11,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 180 transitions, 938 flow, removed 26 selfloop flow, removed 5 redundant places. [2023-11-28 23:56:11,976 INFO L231 Difference]: Finished difference. Result has 74 places, 82 transitions, 435 flow [2023-11-28 23:56:11,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=435, PETRI_PLACES=74, PETRI_TRANSITIONS=82} [2023-11-28 23:56:11,977 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 18 predicate places. [2023-11-28 23:56:11,978 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 82 transitions, 435 flow [2023-11-28 23:56:11,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 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) [2023-11-28 23:56:11,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:56:11,978 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:56:11,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-28 23:56:11,979 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)] === [2023-11-28 23:56:11,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:56:11,979 INFO L85 PathProgramCache]: Analyzing trace with hash -710368975, now seen corresponding path program 1 times [2023-11-28 23:56:11,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:56:11,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277314367] [2023-11-28 23:56:11,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:56:11,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:56:12,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:56:12,770 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-28 23:56:12,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:56:12,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277314367] [2023-11-28 23:56:12,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277314367] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:56:12,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659807373] [2023-11-28 23:56:12,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:56:12,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:56:12,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df829ee9-fabe-4d64-a935-83a0bd807da9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:56:12,773 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df829ee9-fabe-4d64-a935-83a0bd807da9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:56:12,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df829ee9-fabe-4d64-a935-83a0bd807da9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-28 23:56:12,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:56:12,925 INFO L262 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-28 23:56:12,929 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:56:13,163 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 [2023-11-28 23:56:13,337 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-28 23:56:13,337 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:56:13,573 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-28 23:56:13,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659807373] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:56:13,573 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:56:13,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 6] total 18 [2023-11-28 23:56:13,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895708368] [2023-11-28 23:56:13,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:56:13,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-28 23:56:13,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:56:13,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-28 23:56:13,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2023-11-28 23:56:13,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 57 [2023-11-28 23:56:13,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 82 transitions, 435 flow. Second operand has 18 states, 18 states have (on average 18.5) internal successors, (333), 18 states have internal predecessors, (333), 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) [2023-11-28 23:56:13,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:56:13,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 57 [2023-11-28 23:56:13,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:56:31,146 INFO L124 PetriNetUnfolderBase]: 159620/213233 cut-off events. [2023-11-28 23:56:31,146 INFO L125 PetriNetUnfolderBase]: For 217964/217964 co-relation queries the response was YES. [2023-11-28 23:56:31,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 554077 conditions, 213233 events. 159620/213233 cut-off events. For 217964/217964 co-relation queries the response was YES. Maximal size of possible extension queue 9915. Compared 1582671 event pairs, 13701 based on Foata normal form. 4/169630 useless extension candidates. Maximal degree in co-relation 554063. Up to 126366 conditions per place. [2023-11-28 23:56:32,497 INFO L140 encePairwiseOnDemand]: 45/57 looper letters, 460 selfloop transitions, 211 changer transitions 9/689 dead transitions. [2023-11-28 23:56:32,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 689 transitions, 4272 flow [2023-11-28 23:56:32,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-28 23:56:32,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-28 23:56:32,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 889 transitions. [2023-11-28 23:56:32,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.623859649122807 [2023-11-28 23:56:32,503 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 889 transitions. [2023-11-28 23:56:32,503 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 889 transitions. [2023-11-28 23:56:32,504 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:56:32,504 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 889 transitions. [2023-11-28 23:56:32,507 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 35.56) internal successors, (889), 25 states have internal predecessors, (889), 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) [2023-11-28 23:56:32,510 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 57.0) internal successors, (1482), 26 states have internal predecessors, (1482), 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) [2023-11-28 23:56:32,511 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 57.0) internal successors, (1482), 26 states have internal predecessors, (1482), 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) [2023-11-28 23:56:32,511 INFO L175 Difference]: Start difference. First operand has 74 places, 82 transitions, 435 flow. Second operand 25 states and 889 transitions. [2023-11-28 23:56:32,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 689 transitions, 4272 flow [2023-11-28 23:56:36,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 689 transitions, 3964 flow, removed 154 selfloop flow, removed 0 redundant places. [2023-11-28 23:56:36,618 INFO L231 Difference]: Finished difference. Result has 102 places, 298 transitions, 2424 flow [2023-11-28 23:56:36,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=399, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=2424, PETRI_PLACES=102, PETRI_TRANSITIONS=298} [2023-11-28 23:56:36,619 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 46 predicate places. [2023-11-28 23:56:36,619 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 298 transitions, 2424 flow [2023-11-28 23:56:36,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 18.5) internal successors, (333), 18 states have internal predecessors, (333), 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) [2023-11-28 23:56:36,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:56:36,620 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:56:36,624 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df829ee9-fabe-4d64-a935-83a0bd807da9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-28 23:56:36,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df829ee9-fabe-4d64-a935-83a0bd807da9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-28 23:56:36,820 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-28 23:56:36,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:56:36,821 INFO L85 PathProgramCache]: Analyzing trace with hash 35908423, now seen corresponding path program 1 times [2023-11-28 23:56:36,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:56:36,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076779959] [2023-11-28 23:56:36,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:56:36,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:56:36,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:56:37,835 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:56:37,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:56:37,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076779959] [2023-11-28 23:56:37,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076779959] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:56:37,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111122097] [2023-11-28 23:56:37,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:56:37,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:56:37,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df829ee9-fabe-4d64-a935-83a0bd807da9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:56:37,839 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df829ee9-fabe-4d64-a935-83a0bd807da9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:56:37,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df829ee9-fabe-4d64-a935-83a0bd807da9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-28 23:56:37,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:56:37,984 INFO L262 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-28 23:56:37,986 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:56:38,325 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 [2023-11-28 23:56:38,387 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-28 23:56:38,387 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:56:38,579 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-28 23:56:38,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111122097] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:56:38,579 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:56:38,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 6] total 20 [2023-11-28 23:56:38,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885642788] [2023-11-28 23:56:38,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:56:38,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-28 23:56:38,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:56:38,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-28 23:56:38,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2023-11-28 23:56:38,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 57 [2023-11-28 23:56:38,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 298 transitions, 2424 flow. Second operand has 20 states, 20 states have (on average 18.0) internal successors, (360), 20 states have internal predecessors, (360), 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) [2023-11-28 23:56:38,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:56:38,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 57 [2023-11-28 23:56:38,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:57:06,251 INFO L124 PetriNetUnfolderBase]: 208100/278516 cut-off events. [2023-11-28 23:57:06,251 INFO L125 PetriNetUnfolderBase]: For 362267/362267 co-relation queries the response was YES. [2023-11-28 23:57:07,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 775996 conditions, 278516 events. 208100/278516 cut-off events. For 362267/362267 co-relation queries the response was YES. Maximal size of possible extension queue 12998. Compared 2143468 event pairs, 21909 based on Foata normal form. 4/223380 useless extension candidates. Maximal degree in co-relation 775978. Up to 193120 conditions per place. [2023-11-28 23:57:08,286 INFO L140 encePairwiseOnDemand]: 45/57 looper letters, 644 selfloop transitions, 279 changer transitions 9/941 dead transitions. [2023-11-28 23:57:08,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 941 transitions, 7119 flow [2023-11-28 23:57:08,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-28 23:57:08,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-28 23:57:08,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 998 transitions. [2023-11-28 23:57:08,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.583625730994152 [2023-11-28 23:57:08,291 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 998 transitions. [2023-11-28 23:57:08,291 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 998 transitions. [2023-11-28 23:57:08,292 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:57:08,292 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 998 transitions. [2023-11-28 23:57:08,296 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 33.266666666666666) internal successors, (998), 30 states have internal predecessors, (998), 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) [2023-11-28 23:57:08,300 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 57.0) internal successors, (1767), 31 states have internal predecessors, (1767), 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) [2023-11-28 23:57:08,301 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 57.0) internal successors, (1767), 31 states have internal predecessors, (1767), 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) [2023-11-28 23:57:08,301 INFO L175 Difference]: Start difference. First operand has 102 places, 298 transitions, 2424 flow. Second operand 30 states and 998 transitions. [2023-11-28 23:57:08,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 941 transitions, 7119 flow [2023-11-28 23:58:01,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 941 transitions, 6717 flow, removed 195 selfloop flow, removed 3 redundant places. [2023-11-28 23:58:01,749 INFO L231 Difference]: Finished difference. Result has 140 places, 512 transitions, 4857 flow [2023-11-28 23:58:01,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=2182, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=4857, PETRI_PLACES=140, PETRI_TRANSITIONS=512} [2023-11-28 23:58:01,750 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 84 predicate places. [2023-11-28 23:58:01,750 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 512 transitions, 4857 flow [2023-11-28 23:58:01,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 18.0) internal successors, (360), 20 states have internal predecessors, (360), 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) [2023-11-28 23:58:01,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:58:01,751 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:58:01,755 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df829ee9-fabe-4d64-a935-83a0bd807da9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-28 23:58:01,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df829ee9-fabe-4d64-a935-83a0bd807da9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-28 23:58:01,951 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-28 23:58:01,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:58:01,952 INFO L85 PathProgramCache]: Analyzing trace with hash 315303297, now seen corresponding path program 2 times [2023-11-28 23:58:01,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:58:01,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007130932] [2023-11-28 23:58:01,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:58:01,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:58:01,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:58:02,723 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:58:02,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:58:02,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007130932] [2023-11-28 23:58:02,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007130932] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:58:02,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638917096] [2023-11-28 23:58:02,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-28 23:58:02,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:58:02,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df829ee9-fabe-4d64-a935-83a0bd807da9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:58:02,725 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df829ee9-fabe-4d64-a935-83a0bd807da9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:58:02,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df829ee9-fabe-4d64-a935-83a0bd807da9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-28 23:58:02,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-28 23:58:02,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 23:58:02,885 INFO L262 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-28 23:58:02,889 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:58:03,112 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 [2023-11-28 23:58:03,249 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-28 23:58:03,249 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:58:03,454 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-28 23:58:03,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638917096] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:58:03,454 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:58:03,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 6] total 20 [2023-11-28 23:58:03,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418190192] [2023-11-28 23:58:03,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:58:03,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-28 23:58:03,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:58:03,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-28 23:58:03,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2023-11-28 23:58:03,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 57 [2023-11-28 23:58:03,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 512 transitions, 4857 flow. Second operand has 20 states, 20 states have (on average 18.0) internal successors, (360), 20 states have internal predecessors, (360), 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) [2023-11-28 23:58:03,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:58:03,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 57 [2023-11-28 23:58:03,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:58:46,600 INFO L124 PetriNetUnfolderBase]: 246855/331469 cut-off events. [2023-11-28 23:58:46,600 INFO L125 PetriNetUnfolderBase]: For 556396/556396 co-relation queries the response was YES. [2023-11-28 23:58:48,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 984442 conditions, 331469 events. 246855/331469 cut-off events. For 556396/556396 co-relation queries the response was YES. Maximal size of possible extension queue 16016. Compared 2620469 event pairs, 28099 based on Foata normal form. 4/267501 useless extension candidates. Maximal degree in co-relation 984412. Up to 260484 conditions per place. [2023-11-28 23:58:49,947 INFO L140 encePairwiseOnDemand]: 45/57 looper letters, 799 selfloop transitions, 289 changer transitions 8/1105 dead transitions. [2023-11-28 23:58:49,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 1105 transitions, 10061 flow [2023-11-28 23:58:49,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-28 23:58:49,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-28 23:58:49,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 928 transitions. [2023-11-28 23:58:49,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5614035087719298 [2023-11-28 23:58:49,952 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 928 transitions. [2023-11-28 23:58:49,952 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 928 transitions. [2023-11-28 23:58:49,954 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:58:49,954 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 928 transitions. [2023-11-28 23:58:49,957 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 32.0) internal successors, (928), 29 states have internal predecessors, (928), 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) [2023-11-28 23:58:49,961 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 57.0) internal successors, (1710), 30 states have internal predecessors, (1710), 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) [2023-11-28 23:58:49,962 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 57.0) internal successors, (1710), 30 states have internal predecessors, (1710), 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) [2023-11-28 23:58:49,962 INFO L175 Difference]: Start difference. First operand has 140 places, 512 transitions, 4857 flow. Second operand 29 states and 928 transitions. [2023-11-28 23:58:49,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 1105 transitions, 10061 flow [2023-11-29 00:00:27,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 1105 transitions, 9764 flow, removed 133 selfloop flow, removed 7 redundant places. [2023-11-29 00:00:27,808 INFO L231 Difference]: Finished difference. Result has 170 places, 723 transitions, 7621 flow [2023-11-29 00:00:27,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=4570, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=7621, PETRI_PLACES=170, PETRI_TRANSITIONS=723} [2023-11-29 00:00:27,809 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 114 predicate places. [2023-11-29 00:00:27,809 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 723 transitions, 7621 flow [2023-11-29 00:00:27,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 18.0) internal successors, (360), 20 states have internal predecessors, (360), 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) [2023-11-29 00:00:27,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:00:27,809 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:00:27,813 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df829ee9-fabe-4d64-a935-83a0bd807da9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 00:00:28,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df829ee9-fabe-4d64-a935-83a0bd807da9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-29 00:00:28,010 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-29 00:00:28,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:00:28,010 INFO L85 PathProgramCache]: Analyzing trace with hash -236168847, now seen corresponding path program 3 times [2023-11-29 00:00:28,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:00:28,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380888934] [2023-11-29 00:00:28,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:00:28,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:00:28,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:00:28,738 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:00:28,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:00:28,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380888934] [2023-11-29 00:00:28,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380888934] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:00:28,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605139316] [2023-11-29 00:00:28,739 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 00:00:28,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:00:28,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df829ee9-fabe-4d64-a935-83a0bd807da9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:00:28,742 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df829ee9-fabe-4d64-a935-83a0bd807da9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:00:28,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df829ee9-fabe-4d64-a935-83a0bd807da9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 00:00:28,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 00:00:28,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:00:28,896 INFO L262 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-29 00:00:28,899 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:00:29,123 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 [2023-11-29 00:00:29,269 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:00:29,269 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:00:29,434 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-29 00:00:29,435 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 [2023-11-29 00:00:29,526 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 00:00:29,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605139316] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 00:00:29,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:00:29,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9, 8] total 20 [2023-11-29 00:00:29,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575206525] [2023-11-29 00:00:29,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:00:29,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 00:00:29,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:00:29,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 00:00:29,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2023-11-29 00:00:29,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 57 [2023-11-29 00:00:29,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 723 transitions, 7621 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 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) [2023-11-29 00:00:29,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:00:29,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 57 [2023-11-29 00:00:29,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand