./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-figure1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/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_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-figure1.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/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_32bfca76-892c-49a6-9ad9-96430e65dba8/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 611602be63cf2d0baa947efd80226c155579158ab3e72558e2c6507fec5bab01 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 06:12:58,836 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 06:12:58,902 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 06:12:58,907 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 06:12:58,908 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 06:12:58,932 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 06:12:58,933 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 06:12:58,933 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 06:12:58,934 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 06:12:58,934 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 06:12:58,935 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 06:12:58,936 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 06:12:58,936 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 06:12:58,937 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 06:12:58,937 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 06:12:58,938 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 06:12:58,939 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 06:12:58,939 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 06:12:58,939 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 06:12:58,940 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 06:12:58,940 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 06:12:58,943 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 06:12:58,944 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 06:12:58,944 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 06:12:58,944 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 06:12:58,945 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 06:12:58,945 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 06:12:58,946 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 06:12:58,946 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 06:12:58,946 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 06:12:58,947 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 06:12:58,947 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 06:12:58,947 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 06:12:58,948 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 06:12:58,948 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 06:12:58,948 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 06:12:58,948 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 06:12:58,948 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 06:12:58,949 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 06:12:58,949 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 06:12:58,949 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 06:12:58,949 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 06:12:58,950 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_32bfca76-892c-49a6-9ad9-96430e65dba8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 611602be63cf2d0baa947efd80226c155579158ab3e72558e2c6507fec5bab01 [2023-11-29 06:12:59,175 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 06:12:59,195 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 06:12:59,198 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 06:12:59,198 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 06:12:59,199 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 06:12:59,200 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/popl20-figure1.wvr.c [2023-11-29 06:13:01,913 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 06:13:02,088 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 06:13:02,089 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/sv-benchmarks/c/weaver/popl20-figure1.wvr.c [2023-11-29 06:13:02,096 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/data/a3f8fed76/40b683f44d284d3195a49636ff5b3f49/FLAG2b23ccc4e [2023-11-29 06:13:02,110 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/data/a3f8fed76/40b683f44d284d3195a49636ff5b3f49 [2023-11-29 06:13:02,113 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 06:13:02,115 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 06:13:02,116 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 06:13:02,116 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 06:13:02,121 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 06:13:02,122 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:13:02" (1/1) ... [2023-11-29 06:13:02,123 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31654960 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:13:02, skipping insertion in model container [2023-11-29 06:13:02,123 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:13:02" (1/1) ... [2023-11-29 06:13:02,146 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 06:13:02,320 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_32bfca76-892c-49a6-9ad9-96430e65dba8/sv-benchmarks/c/weaver/popl20-figure1.wvr.c[2017,2030] [2023-11-29 06:13:02,325 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 06:13:02,333 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 06:13:02,351 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_32bfca76-892c-49a6-9ad9-96430e65dba8/sv-benchmarks/c/weaver/popl20-figure1.wvr.c[2017,2030] [2023-11-29 06:13:02,352 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 06:13:02,360 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 06:13:02,360 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 06:13:02,368 INFO L206 MainTranslator]: Completed translation [2023-11-29 06:13:02,368 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:13:02 WrapperNode [2023-11-29 06:13:02,368 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 06:13:02,370 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 06:13:02,370 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 06:13:02,370 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 06:13:02,376 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:13:02" (1/1) ... [2023-11-29 06:13:02,383 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:13:02" (1/1) ... [2023-11-29 06:13:02,400 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 70 [2023-11-29 06:13:02,401 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 06:13:02,401 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 06:13:02,402 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 06:13:02,402 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 06:13:02,413 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:13:02" (1/1) ... [2023-11-29 06:13:02,413 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:13:02" (1/1) ... [2023-11-29 06:13:02,415 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:13:02" (1/1) ... [2023-11-29 06:13:02,429 INFO L175 MemorySlicer]: Split 6 memory accesses to 3 slices as follows [2, 2, 2]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2023-11-29 06:13:02,429 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:13:02" (1/1) ... [2023-11-29 06:13:02,429 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:13:02" (1/1) ... [2023-11-29 06:13:02,433 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:13:02" (1/1) ... [2023-11-29 06:13:02,435 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:13:02" (1/1) ... [2023-11-29 06:13:02,437 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:13:02" (1/1) ... [2023-11-29 06:13:02,437 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:13:02" (1/1) ... [2023-11-29 06:13:02,439 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 06:13:02,440 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 06:13:02,440 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 06:13:02,440 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 06:13:02,441 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:13:02" (1/1) ... [2023-11-29 06:13:02,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 06:13:02,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:13:02,467 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 06:13:02,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 06:13:02,494 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 06:13:02,494 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-29 06:13:02,495 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-29 06:13:02,495 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-29 06:13:02,495 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-29 06:13:02,495 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 06:13:02,495 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 06:13:02,495 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 06:13:02,495 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 06:13:02,495 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 06:13:02,495 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 06:13:02,495 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 06:13:02,496 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-29 06:13:02,496 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-29 06:13:02,496 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 06:13:02,496 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 06:13:02,496 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 06:13:02,496 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 06:13:02,496 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 06:13:02,496 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 06:13:02,497 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-29 06:13:02,583 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 06:13:02,584 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 06:13:02,741 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 06:13:02,857 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 06:13:02,857 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-29 06:13:02,858 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:13:02 BoogieIcfgContainer [2023-11-29 06:13:02,858 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 06:13:02,861 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 06:13:02,861 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 06:13:02,865 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 06:13:02,865 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 06:13:02" (1/3) ... [2023-11-29 06:13:02,866 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54b76343 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:13:02, skipping insertion in model container [2023-11-29 06:13:02,866 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:13:02" (2/3) ... [2023-11-29 06:13:02,866 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54b76343 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:13:02, skipping insertion in model container [2023-11-29 06:13:02,866 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:13:02" (3/3) ... [2023-11-29 06:13:02,868 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure1.wvr.c [2023-11-29 06:13:02,876 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-29 06:13:02,886 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 06:13:02,887 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 06:13:02,887 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 06:13:02,924 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-29 06:13:02,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 28 places, 23 transitions, 60 flow [2023-11-29 06:13:02,980 INFO L124 PetriNetUnfolderBase]: 2/21 cut-off events. [2023-11-29 06:13:02,980 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-29 06:13:02,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30 conditions, 21 events. 2/21 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 20 event pairs, 0 based on Foata normal form. 0/18 useless extension candidates. Maximal degree in co-relation 15. Up to 2 conditions per place. [2023-11-29 06:13:02,983 INFO L82 GeneralOperation]: Start removeDead. Operand has 28 places, 23 transitions, 60 flow [2023-11-29 06:13:02,986 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 25 places, 20 transitions, 52 flow [2023-11-29 06:13:02,997 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 06:13:03,004 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;@6e7dca3f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 06:13:03,004 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-29 06:13:03,014 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 06:13:03,014 INFO L124 PetriNetUnfolderBase]: 2/19 cut-off events. [2023-11-29 06:13:03,014 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-29 06:13:03,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:13:03,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:13:03,016 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:13:03,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:13:03,021 INFO L85 PathProgramCache]: Analyzing trace with hash -760149179, now seen corresponding path program 1 times [2023-11-29 06:13:03,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:13:03,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101957942] [2023-11-29 06:13:03,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:13:03,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:13:03,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:13:03,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:13:03,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:13:03,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101957942] [2023-11-29 06:13:03,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101957942] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:13:03,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:13:03,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 06:13:03,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448982938] [2023-11-29 06:13:03,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:13:03,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:13:03,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:13:03,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:13:03,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:13:03,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 23 [2023-11-29 06:13:03,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 20 transitions, 52 flow. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 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 06:13:03,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:13:03,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 23 [2023-11-29 06:13:03,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:13:03,402 INFO L124 PetriNetUnfolderBase]: 82/168 cut-off events. [2023-11-29 06:13:03,402 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2023-11-29 06:13:03,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 349 conditions, 168 events. 82/168 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 526 event pairs, 30 based on Foata normal form. 6/173 useless extension candidates. Maximal degree in co-relation 271. Up to 99 conditions per place. [2023-11-29 06:13:03,406 INFO L140 encePairwiseOnDemand]: 19/23 looper letters, 21 selfloop transitions, 2 changer transitions 4/30 dead transitions. [2023-11-29 06:13:03,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 30 transitions, 135 flow [2023-11-29 06:13:03,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:13:03,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 06:13:03,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 44 transitions. [2023-11-29 06:13:03,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6376811594202898 [2023-11-29 06:13:03,417 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 44 transitions. [2023-11-29 06:13:03,417 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 44 transitions. [2023-11-29 06:13:03,418 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:13:03,420 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 44 transitions. [2023-11-29 06:13:03,421 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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 06:13:03,424 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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 06:13:03,424 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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 06:13:03,426 INFO L175 Difference]: Start difference. First operand has 25 places, 20 transitions, 52 flow. Second operand 3 states and 44 transitions. [2023-11-29 06:13:03,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 30 transitions, 135 flow [2023-11-29 06:13:03,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 30 transitions, 121 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-29 06:13:03,430 INFO L231 Difference]: Finished difference. Result has 24 places, 21 transitions, 58 flow [2023-11-29 06:13:03,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=58, PETRI_PLACES=24, PETRI_TRANSITIONS=21} [2023-11-29 06:13:03,436 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, -1 predicate places. [2023-11-29 06:13:03,436 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 21 transitions, 58 flow [2023-11-29 06:13:03,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 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 06:13:03,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:13:03,437 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:13:03,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 06:13:03,437 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:13:03,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:13:03,438 INFO L85 PathProgramCache]: Analyzing trace with hash -985292509, now seen corresponding path program 1 times [2023-11-29 06:13:03,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:13:03,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344741239] [2023-11-29 06:13:03,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:13:03,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:13:03,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:13:03,606 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:13:03,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:13:03,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344741239] [2023-11-29 06:13:03,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344741239] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:13:03,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:13:03,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 06:13:03,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118696832] [2023-11-29 06:13:03,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:13:03,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 06:13:03,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:13:03,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 06:13:03,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 06:13:03,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2023-11-29 06:13:03,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 21 transitions, 58 flow. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 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 06:13:03,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:13:03,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2023-11-29 06:13:03,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:13:03,741 INFO L124 PetriNetUnfolderBase]: 138/262 cut-off events. [2023-11-29 06:13:03,741 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2023-11-29 06:13:03,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 578 conditions, 262 events. 138/262 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 999 event pairs, 59 based on Foata normal form. 0/241 useless extension candidates. Maximal degree in co-relation 193. Up to 174 conditions per place. [2023-11-29 06:13:03,745 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 31 selfloop transitions, 7 changer transitions 3/43 dead transitions. [2023-11-29 06:13:03,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 43 transitions, 195 flow [2023-11-29 06:13:03,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 06:13:03,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 06:13:03,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 62 transitions. [2023-11-29 06:13:03,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5391304347826087 [2023-11-29 06:13:03,747 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 62 transitions. [2023-11-29 06:13:03,747 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 62 transitions. [2023-11-29 06:13:03,748 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:13:03,748 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 62 transitions. [2023-11-29 06:13:03,749 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 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 06:13:03,750 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 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 06:13:03,750 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 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 06:13:03,750 INFO L175 Difference]: Start difference. First operand has 24 places, 21 transitions, 58 flow. Second operand 5 states and 62 transitions. [2023-11-29 06:13:03,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 43 transitions, 195 flow [2023-11-29 06:13:03,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 43 transitions, 191 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 06:13:03,753 INFO L231 Difference]: Finished difference. Result has 30 places, 27 transitions, 108 flow [2023-11-29 06:13:03,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=108, PETRI_PLACES=30, PETRI_TRANSITIONS=27} [2023-11-29 06:13:03,754 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 5 predicate places. [2023-11-29 06:13:03,754 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 27 transitions, 108 flow [2023-11-29 06:13:03,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 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 06:13:03,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:13:03,755 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:13:03,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 06:13:03,755 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:13:03,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:13:03,756 INFO L85 PathProgramCache]: Analyzing trace with hash -692240137, now seen corresponding path program 2 times [2023-11-29 06:13:03,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:13:03,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385911325] [2023-11-29 06:13:03,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:13:03,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:13:03,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:13:03,869 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:13:03,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:13:03,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385911325] [2023-11-29 06:13:03,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385911325] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:13:03,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:13:03,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 06:13:03,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916923192] [2023-11-29 06:13:03,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:13:03,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 06:13:03,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:13:03,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 06:13:03,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-29 06:13:03,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2023-11-29 06:13:03,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 27 transitions, 108 flow. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 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 06:13:03,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:13:03,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2023-11-29 06:13:03,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:13:04,024 INFO L124 PetriNetUnfolderBase]: 156/300 cut-off events. [2023-11-29 06:13:04,024 INFO L125 PetriNetUnfolderBase]: For 145/145 co-relation queries the response was YES. [2023-11-29 06:13:04,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 865 conditions, 300 events. 156/300 cut-off events. For 145/145 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1179 event pairs, 4 based on Foata normal form. 14/314 useless extension candidates. Maximal degree in co-relation 357. Up to 130 conditions per place. [2023-11-29 06:13:04,029 INFO L140 encePairwiseOnDemand]: 17/23 looper letters, 46 selfloop transitions, 10 changer transitions 1/59 dead transitions. [2023-11-29 06:13:04,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 59 transitions, 339 flow [2023-11-29 06:13:04,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 06:13:04,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 06:13:04,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 82 transitions. [2023-11-29 06:13:04,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5093167701863354 [2023-11-29 06:13:04,031 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 82 transitions. [2023-11-29 06:13:04,031 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 82 transitions. [2023-11-29 06:13:04,032 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:13:04,032 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 82 transitions. [2023-11-29 06:13:04,033 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 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 06:13:04,034 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 23.0) internal successors, (184), 8 states have internal predecessors, (184), 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 06:13:04,034 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 23.0) internal successors, (184), 8 states have internal predecessors, (184), 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 06:13:04,034 INFO L175 Difference]: Start difference. First operand has 30 places, 27 transitions, 108 flow. Second operand 7 states and 82 transitions. [2023-11-29 06:13:04,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 59 transitions, 339 flow [2023-11-29 06:13:04,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 59 transitions, 337 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-11-29 06:13:04,039 INFO L231 Difference]: Finished difference. Result has 41 places, 33 transitions, 188 flow [2023-11-29 06:13:04,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=188, PETRI_PLACES=41, PETRI_TRANSITIONS=33} [2023-11-29 06:13:04,040 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 16 predicate places. [2023-11-29 06:13:04,040 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 33 transitions, 188 flow [2023-11-29 06:13:04,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 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 06:13:04,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:13:04,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:13:04,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 06:13:04,041 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:13:04,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:13:04,042 INFO L85 PathProgramCache]: Analyzing trace with hash 2010766619, now seen corresponding path program 3 times [2023-11-29 06:13:04,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:13:04,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347992976] [2023-11-29 06:13:04,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:13:04,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:13:04,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:13:04,142 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:13:04,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:13:04,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347992976] [2023-11-29 06:13:04,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347992976] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:13:04,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:13:04,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 06:13:04,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703107596] [2023-11-29 06:13:04,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:13:04,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 06:13:04,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:13:04,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 06:13:04,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 06:13:04,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2023-11-29 06:13:04,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 33 transitions, 188 flow. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 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 06:13:04,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:13:04,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2023-11-29 06:13:04,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:13:04,313 INFO L124 PetriNetUnfolderBase]: 206/393 cut-off events. [2023-11-29 06:13:04,313 INFO L125 PetriNetUnfolderBase]: For 624/624 co-relation queries the response was YES. [2023-11-29 06:13:04,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1355 conditions, 393 events. 206/393 cut-off events. For 624/624 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1617 event pairs, 66 based on Foata normal form. 2/395 useless extension candidates. Maximal degree in co-relation 889. Up to 176 conditions per place. [2023-11-29 06:13:04,319 INFO L140 encePairwiseOnDemand]: 18/23 looper letters, 47 selfloop transitions, 10 changer transitions 2/61 dead transitions. [2023-11-29 06:13:04,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 61 transitions, 445 flow [2023-11-29 06:13:04,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 06:13:04,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 06:13:04,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 61 transitions. [2023-11-29 06:13:04,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5304347826086957 [2023-11-29 06:13:04,323 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 61 transitions. [2023-11-29 06:13:04,323 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 61 transitions. [2023-11-29 06:13:04,323 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:13:04,324 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 61 transitions. [2023-11-29 06:13:04,324 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 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 06:13:04,325 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 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 06:13:04,325 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 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 06:13:04,325 INFO L175 Difference]: Start difference. First operand has 41 places, 33 transitions, 188 flow. Second operand 5 states and 61 transitions. [2023-11-29 06:13:04,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 61 transitions, 445 flow [2023-11-29 06:13:04,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 61 transitions, 442 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 06:13:04,333 INFO L231 Difference]: Finished difference. Result has 47 places, 35 transitions, 239 flow [2023-11-29 06:13:04,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=239, PETRI_PLACES=47, PETRI_TRANSITIONS=35} [2023-11-29 06:13:04,334 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 22 predicate places. [2023-11-29 06:13:04,335 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 35 transitions, 239 flow [2023-11-29 06:13:04,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 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 06:13:04,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:13:04,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:13:04,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-29 06:13:04,336 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:13:04,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:13:04,336 INFO L85 PathProgramCache]: Analyzing trace with hash -39175267, now seen corresponding path program 4 times [2023-11-29 06:13:04,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:13:04,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991112893] [2023-11-29 06:13:04,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:13:04,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:13:04,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:13:04,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:13:04,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:13:04,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991112893] [2023-11-29 06:13:04,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991112893] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:13:04,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351051655] [2023-11-29 06:13:04,439 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 06:13:04,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:13:04,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:13:04,444 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:13:04,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 06:13:04,524 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 06:13:04,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:13:04,527 INFO L262 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 06:13:04,532 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:13:04,615 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:13:04,615 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:13:04,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:13:04,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351051655] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:13:04,659 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:13:04,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2023-11-29 06:13:04,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849744398] [2023-11-29 06:13:04,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:13:04,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 06:13:04,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:13:04,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 06:13:04,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2023-11-29 06:13:04,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2023-11-29 06:13:04,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 35 transitions, 239 flow. Second operand has 11 states, 11 states have (on average 6.181818181818182) internal successors, (68), 11 states have internal predecessors, (68), 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 06:13:04,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:13:04,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2023-11-29 06:13:04,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:13:05,032 INFO L124 PetriNetUnfolderBase]: 383/674 cut-off events. [2023-11-29 06:13:05,033 INFO L125 PetriNetUnfolderBase]: For 1532/1532 co-relation queries the response was YES. [2023-11-29 06:13:05,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2448 conditions, 674 events. 383/674 cut-off events. For 1532/1532 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2850 event pairs, 22 based on Foata normal form. 14/688 useless extension candidates. Maximal degree in co-relation 2102. Up to 155 conditions per place. [2023-11-29 06:13:05,041 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 77 selfloop transitions, 40 changer transitions 1/119 dead transitions. [2023-11-29 06:13:05,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 119 transitions, 900 flow [2023-11-29 06:13:05,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 06:13:05,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-29 06:13:05,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 153 transitions. [2023-11-29 06:13:05,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4434782608695652 [2023-11-29 06:13:05,044 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 153 transitions. [2023-11-29 06:13:05,044 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 153 transitions. [2023-11-29 06:13:05,045 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:13:05,045 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 153 transitions. [2023-11-29 06:13:05,046 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 10.2) internal successors, (153), 15 states have internal predecessors, (153), 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 06:13:05,047 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 23.0) internal successors, (368), 16 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) [2023-11-29 06:13:05,048 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 23.0) internal successors, (368), 16 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) [2023-11-29 06:13:05,048 INFO L175 Difference]: Start difference. First operand has 47 places, 35 transitions, 239 flow. Second operand 15 states and 153 transitions. [2023-11-29 06:13:05,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 119 transitions, 900 flow [2023-11-29 06:13:05,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 119 transitions, 862 flow, removed 10 selfloop flow, removed 2 redundant places. [2023-11-29 06:13:05,056 INFO L231 Difference]: Finished difference. Result has 66 places, 61 transitions, 558 flow [2023-11-29 06:13:05,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=558, PETRI_PLACES=66, PETRI_TRANSITIONS=61} [2023-11-29 06:13:05,057 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 41 predicate places. [2023-11-29 06:13:05,057 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 61 transitions, 558 flow [2023-11-29 06:13:05,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.181818181818182) internal successors, (68), 11 states have internal predecessors, (68), 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 06:13:05,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:13:05,058 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:13:05,068 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 06:13:05,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:13:05,259 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:13:05,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:13:05,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1775204631, now seen corresponding path program 5 times [2023-11-29 06:13:05,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:13:05,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158302792] [2023-11-29 06:13:05,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:13:05,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:13:05,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:13:05,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:13:05,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:13:05,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158302792] [2023-11-29 06:13:05,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158302792] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:13:05,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065805999] [2023-11-29 06:13:05,347 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 06:13:05,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:13:05,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:13:05,348 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:13:05,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 06:13:05,423 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:13:05,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:13:05,424 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 06:13:05,426 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:13:05,474 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:13:05,474 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:13:05,508 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:13:05,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065805999] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:13:05,508 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:13:05,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2023-11-29 06:13:05,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081043518] [2023-11-29 06:13:05,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:13:05,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 06:13:05,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:13:05,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 06:13:05,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-11-29 06:13:05,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2023-11-29 06:13:05,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 61 transitions, 558 flow. Second operand has 11 states, 11 states have (on average 5.818181818181818) internal successors, (64), 11 states have internal predecessors, (64), 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 06:13:05,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:13:05,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2023-11-29 06:13:05,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:13:05,762 INFO L124 PetriNetUnfolderBase]: 368/657 cut-off events. [2023-11-29 06:13:05,762 INFO L125 PetriNetUnfolderBase]: For 2948/2948 co-relation queries the response was YES. [2023-11-29 06:13:05,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2832 conditions, 657 events. 368/657 cut-off events. For 2948/2948 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2814 event pairs, 71 based on Foata normal form. 14/671 useless extension candidates. Maximal degree in co-relation 2469. Up to 243 conditions per place. [2023-11-29 06:13:05,771 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 69 selfloop transitions, 37 changer transitions 1/108 dead transitions. [2023-11-29 06:13:05,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 108 transitions, 1057 flow [2023-11-29 06:13:05,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 06:13:05,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-29 06:13:05,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 93 transitions. [2023-11-29 06:13:05,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5054347826086957 [2023-11-29 06:13:05,773 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 93 transitions. [2023-11-29 06:13:05,773 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 93 transitions. [2023-11-29 06:13:05,773 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:13:05,774 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 93 transitions. [2023-11-29 06:13:05,774 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 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 06:13:05,775 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 23.0) internal successors, (207), 9 states have internal predecessors, (207), 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 06:13:05,775 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 23.0) internal successors, (207), 9 states have internal predecessors, (207), 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 06:13:05,775 INFO L175 Difference]: Start difference. First operand has 66 places, 61 transitions, 558 flow. Second operand 8 states and 93 transitions. [2023-11-29 06:13:05,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 108 transitions, 1057 flow [2023-11-29 06:13:05,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 108 transitions, 918 flow, removed 60 selfloop flow, removed 3 redundant places. [2023-11-29 06:13:05,792 INFO L231 Difference]: Finished difference. Result has 74 places, 72 transitions, 680 flow [2023-11-29 06:13:05,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=459, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=680, PETRI_PLACES=74, PETRI_TRANSITIONS=72} [2023-11-29 06:13:05,793 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 49 predicate places. [2023-11-29 06:13:05,793 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 72 transitions, 680 flow [2023-11-29 06:13:05,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.818181818181818) internal successors, (64), 11 states have internal predecessors, (64), 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 06:13:05,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:13:05,794 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:13:05,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-29 06:13:05,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:13:05,996 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:13:05,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:13:05,997 INFO L85 PathProgramCache]: Analyzing trace with hash -2044127133, now seen corresponding path program 6 times [2023-11-29 06:13:05,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:13:05,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185938054] [2023-11-29 06:13:05,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:13:05,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:13:06,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:13:06,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:13:06,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:13:06,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185938054] [2023-11-29 06:13:06,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185938054] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:13:06,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:13:06,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 06:13:06,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245167839] [2023-11-29 06:13:06,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:13:06,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 06:13:06,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:13:06,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 06:13:06,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 06:13:06,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2023-11-29 06:13:06,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 72 transitions, 680 flow. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 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 06:13:06,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:13:06,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2023-11-29 06:13:06,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:13:06,243 INFO L124 PetriNetUnfolderBase]: 300/556 cut-off events. [2023-11-29 06:13:06,243 INFO L125 PetriNetUnfolderBase]: For 2730/2732 co-relation queries the response was YES. [2023-11-29 06:13:06,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2391 conditions, 556 events. 300/556 cut-off events. For 2730/2732 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2410 event pairs, 88 based on Foata normal form. 2/549 useless extension candidates. Maximal degree in co-relation 2189. Up to 284 conditions per place. [2023-11-29 06:13:06,251 INFO L140 encePairwiseOnDemand]: 17/23 looper letters, 50 selfloop transitions, 22 changer transitions 2/86 dead transitions. [2023-11-29 06:13:06,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 86 transitions, 891 flow [2023-11-29 06:13:06,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 06:13:06,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 06:13:06,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 57 transitions. [2023-11-29 06:13:06,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4956521739130435 [2023-11-29 06:13:06,252 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 57 transitions. [2023-11-29 06:13:06,252 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 57 transitions. [2023-11-29 06:13:06,252 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:13:06,253 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 57 transitions. [2023-11-29 06:13:06,253 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 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 06:13:06,254 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 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 06:13:06,254 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 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 06:13:06,254 INFO L175 Difference]: Start difference. First operand has 74 places, 72 transitions, 680 flow. Second operand 5 states and 57 transitions. [2023-11-29 06:13:06,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 86 transitions, 891 flow [2023-11-29 06:13:06,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 86 transitions, 822 flow, removed 14 selfloop flow, removed 5 redundant places. [2023-11-29 06:13:06,268 INFO L231 Difference]: Finished difference. Result has 74 places, 71 transitions, 649 flow [2023-11-29 06:13:06,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=611, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=649, PETRI_PLACES=74, PETRI_TRANSITIONS=71} [2023-11-29 06:13:06,269 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 49 predicate places. [2023-11-29 06:13:06,269 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 71 transitions, 649 flow [2023-11-29 06:13:06,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 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 06:13:06,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:13:06,269 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] [2023-11-29 06:13:06,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-29 06:13:06,270 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:13:06,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:13:06,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1322100768, now seen corresponding path program 1 times [2023-11-29 06:13:06,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:13:06,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16050142] [2023-11-29 06:13:06,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:13:06,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:13:06,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:13:06,359 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:13:06,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:13:06,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16050142] [2023-11-29 06:13:06,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16050142] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:13:06,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55027052] [2023-11-29 06:13:06,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:13:06,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:13:06,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:13:06,362 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:13:06,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 06:13:06,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:13:06,445 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 06:13:06,446 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:13:06,479 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:13:06,480 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:13:06,517 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:13:06,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55027052] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:13:06,518 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:13:06,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2023-11-29 06:13:06,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117909150] [2023-11-29 06:13:06,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:13:06,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 06:13:06,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:13:06,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 06:13:06,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 06:13:06,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 23 [2023-11-29 06:13:06,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 71 transitions, 649 flow. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 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 06:13:06,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:13:06,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 23 [2023-11-29 06:13:06,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:13:06,722 INFO L124 PetriNetUnfolderBase]: 479/940 cut-off events. [2023-11-29 06:13:06,722 INFO L125 PetriNetUnfolderBase]: For 4430/4444 co-relation queries the response was YES. [2023-11-29 06:13:06,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3846 conditions, 940 events. 479/940 cut-off events. For 4430/4444 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 4888 event pairs, 76 based on Foata normal form. 19/954 useless extension candidates. Maximal degree in co-relation 2868. Up to 367 conditions per place. [2023-11-29 06:13:06,733 INFO L140 encePairwiseOnDemand]: 19/23 looper letters, 94 selfloop transitions, 5 changer transitions 16/133 dead transitions. [2023-11-29 06:13:06,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 133 transitions, 1419 flow [2023-11-29 06:13:06,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 06:13:06,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 06:13:06,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 65 transitions. [2023-11-29 06:13:06,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7065217391304348 [2023-11-29 06:13:06,735 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 65 transitions. [2023-11-29 06:13:06,735 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 65 transitions. [2023-11-29 06:13:06,735 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:13:06,735 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 65 transitions. [2023-11-29 06:13:06,736 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 16.25) internal successors, (65), 4 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) [2023-11-29 06:13:06,736 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 23.0) internal successors, (115), 5 states have internal predecessors, (115), 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 06:13:06,737 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 23.0) internal successors, (115), 5 states have internal predecessors, (115), 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 06:13:06,737 INFO L175 Difference]: Start difference. First operand has 74 places, 71 transitions, 649 flow. Second operand 4 states and 65 transitions. [2023-11-29 06:13:06,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 133 transitions, 1419 flow [2023-11-29 06:13:06,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 133 transitions, 1327 flow, removed 1 selfloop flow, removed 4 redundant places. [2023-11-29 06:13:06,752 INFO L231 Difference]: Finished difference. Result has 73 places, 73 transitions, 634 flow [2023-11-29 06:13:06,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=596, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=634, PETRI_PLACES=73, PETRI_TRANSITIONS=73} [2023-11-29 06:13:06,753 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 48 predicate places. [2023-11-29 06:13:06,753 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 73 transitions, 634 flow [2023-11-29 06:13:06,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 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 06:13:06,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:13:06,753 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] [2023-11-29 06:13:06,759 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 06:13:06,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:13:06,955 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:13:06,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:13:06,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1823025036, now seen corresponding path program 2 times [2023-11-29 06:13:06,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:13:06,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54107157] [2023-11-29 06:13:06,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:13:06,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:13:06,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:13:07,067 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:13:07,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:13:07,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54107157] [2023-11-29 06:13:07,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54107157] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:13:07,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521177129] [2023-11-29 06:13:07,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:13:07,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:13:07,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:13:07,070 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:13:07,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 06:13:07,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:13:07,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:13:07,153 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 06:13:07,155 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:13:07,245 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:13:07,245 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:13:07,298 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:13:07,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521177129] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:13:07,298 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:13:07,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-11-29 06:13:07,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721296720] [2023-11-29 06:13:07,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:13:07,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 06:13:07,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:13:07,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 06:13:07,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2023-11-29 06:13:07,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2023-11-29 06:13:07,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 73 transitions, 634 flow. Second operand has 13 states, 13 states have (on average 6.153846153846154) internal successors, (80), 13 states have internal predecessors, (80), 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 06:13:07,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:13:07,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2023-11-29 06:13:07,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:13:07,837 INFO L124 PetriNetUnfolderBase]: 1136/1892 cut-off events. [2023-11-29 06:13:07,838 INFO L125 PetriNetUnfolderBase]: For 7014/7014 co-relation queries the response was YES. [2023-11-29 06:13:07,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8185 conditions, 1892 events. 1136/1892 cut-off events. For 7014/7014 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 8883 event pairs, 140 based on Foata normal form. 12/1886 useless extension candidates. Maximal degree in co-relation 6376. Up to 509 conditions per place. [2023-11-29 06:13:07,858 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 133 selfloop transitions, 55 changer transitions 3/192 dead transitions. [2023-11-29 06:13:07,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 192 transitions, 1815 flow [2023-11-29 06:13:07,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 06:13:07,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-29 06:13:07,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 157 transitions. [2023-11-29 06:13:07,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48757763975155277 [2023-11-29 06:13:07,860 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 157 transitions. [2023-11-29 06:13:07,860 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 157 transitions. [2023-11-29 06:13:07,860 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:13:07,860 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 157 transitions. [2023-11-29 06:13:07,861 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 11.214285714285714) internal successors, (157), 14 states have internal predecessors, (157), 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 06:13:07,862 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 23.0) internal successors, (345), 15 states have internal predecessors, (345), 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 06:13:07,862 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 23.0) internal successors, (345), 15 states have internal predecessors, (345), 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 06:13:07,862 INFO L175 Difference]: Start difference. First operand has 73 places, 73 transitions, 634 flow. Second operand 14 states and 157 transitions. [2023-11-29 06:13:07,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 192 transitions, 1815 flow [2023-11-29 06:13:07,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 192 transitions, 1775 flow, removed 20 selfloop flow, removed 0 redundant places. [2023-11-29 06:13:07,882 INFO L231 Difference]: Finished difference. Result has 91 places, 103 transitions, 1021 flow [2023-11-29 06:13:07,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=630, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1021, PETRI_PLACES=91, PETRI_TRANSITIONS=103} [2023-11-29 06:13:07,883 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 66 predicate places. [2023-11-29 06:13:07,883 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 103 transitions, 1021 flow [2023-11-29 06:13:07,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.153846153846154) internal successors, (80), 13 states have internal predecessors, (80), 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 06:13:07,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:13:07,883 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] [2023-11-29 06:13:07,889 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 06:13:08,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-29 06:13:08,084 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:13:08,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:13:08,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1653714896, now seen corresponding path program 3 times [2023-11-29 06:13:08,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:13:08,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545079905] [2023-11-29 06:13:08,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:13:08,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:13:08,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:13:08,196 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:13:08,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:13:08,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545079905] [2023-11-29 06:13:08,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545079905] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:13:08,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325316538] [2023-11-29 06:13:08,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 06:13:08,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:13:08,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:13:08,198 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:13:08,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 06:13:08,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 06:13:08,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:13:08,287 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 06:13:08,289 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:13:08,355 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:13:08,355 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:13:08,418 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:13:08,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325316538] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:13:08,419 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:13:08,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-11-29 06:13:08,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090372414] [2023-11-29 06:13:08,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:13:08,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 06:13:08,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:13:08,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 06:13:08,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-11-29 06:13:08,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2023-11-29 06:13:08,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 103 transitions, 1021 flow. Second operand has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 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 06:13:08,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:13:08,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2023-11-29 06:13:08,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:13:09,095 INFO L124 PetriNetUnfolderBase]: 1405/2346 cut-off events. [2023-11-29 06:13:09,096 INFO L125 PetriNetUnfolderBase]: For 12965/12965 co-relation queries the response was YES. [2023-11-29 06:13:09,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11473 conditions, 2346 events. 1405/2346 cut-off events. For 12965/12965 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 11610 event pairs, 71 based on Foata normal form. 38/2384 useless extension candidates. Maximal degree in co-relation 9134. Up to 614 conditions per place. [2023-11-29 06:13:09,124 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 101 selfloop transitions, 98 changer transitions 29/229 dead transitions. [2023-11-29 06:13:09,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 229 transitions, 2421 flow [2023-11-29 06:13:09,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 06:13:09,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-29 06:13:09,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 153 transitions. [2023-11-29 06:13:09,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4434782608695652 [2023-11-29 06:13:09,126 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 153 transitions. [2023-11-29 06:13:09,126 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 153 transitions. [2023-11-29 06:13:09,127 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:13:09,127 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 153 transitions. [2023-11-29 06:13:09,128 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 10.2) internal successors, (153), 15 states have internal predecessors, (153), 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 06:13:09,129 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 23.0) internal successors, (368), 16 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) [2023-11-29 06:13:09,129 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 23.0) internal successors, (368), 16 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) [2023-11-29 06:13:09,129 INFO L175 Difference]: Start difference. First operand has 91 places, 103 transitions, 1021 flow. Second operand 15 states and 153 transitions. [2023-11-29 06:13:09,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 229 transitions, 2421 flow [2023-11-29 06:13:09,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 229 transitions, 2299 flow, removed 53 selfloop flow, removed 2 redundant places. [2023-11-29 06:13:09,165 INFO L231 Difference]: Finished difference. Result has 110 places, 141 transitions, 1659 flow [2023-11-29 06:13:09,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=945, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1659, PETRI_PLACES=110, PETRI_TRANSITIONS=141} [2023-11-29 06:13:09,166 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 85 predicate places. [2023-11-29 06:13:09,166 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 141 transitions, 1659 flow [2023-11-29 06:13:09,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 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 06:13:09,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:13:09,166 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] [2023-11-29 06:13:09,172 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 06:13:09,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 06:13:09,372 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:13:09,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:13:09,372 INFO L85 PathProgramCache]: Analyzing trace with hash -803626312, now seen corresponding path program 4 times [2023-11-29 06:13:09,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:13:09,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940447678] [2023-11-29 06:13:09,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:13:09,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:13:09,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:13:09,451 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:13:09,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:13:09,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940447678] [2023-11-29 06:13:09,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940447678] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:13:09,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694058211] [2023-11-29 06:13:09,452 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 06:13:09,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:13:09,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:13:09,453 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:13:09,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 06:13:09,517 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 06:13:09,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:13:09,518 INFO L262 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 06:13:09,519 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:13:09,583 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:13:09,583 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:13:09,635 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:13:09,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694058211] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:13:09,636 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:13:09,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-29 06:13:09,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57485788] [2023-11-29 06:13:09,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:13:09,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 06:13:09,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:13:09,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 06:13:09,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-11-29 06:13:09,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2023-11-29 06:13:09,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 141 transitions, 1659 flow. Second operand has 15 states, 15 states have (on average 5.533333333333333) internal successors, (83), 15 states have internal predecessors, (83), 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 06:13:09,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:13:09,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2023-11-29 06:13:09,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:13:10,345 INFO L124 PetriNetUnfolderBase]: 1757/2921 cut-off events. [2023-11-29 06:13:10,345 INFO L125 PetriNetUnfolderBase]: For 25219/25219 co-relation queries the response was YES. [2023-11-29 06:13:10,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15958 conditions, 2921 events. 1757/2921 cut-off events. For 25219/25219 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 15020 event pairs, 152 based on Foata normal form. 18/2939 useless extension candidates. Maximal degree in co-relation 15267. Up to 581 conditions per place. [2023-11-29 06:13:10,386 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 152 selfloop transitions, 107 changer transitions 3/263 dead transitions. [2023-11-29 06:13:10,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 263 transitions, 3258 flow [2023-11-29 06:13:10,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-29 06:13:10,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-29 06:13:10,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 170 transitions. [2023-11-29 06:13:10,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43478260869565216 [2023-11-29 06:13:10,389 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 170 transitions. [2023-11-29 06:13:10,389 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 170 transitions. [2023-11-29 06:13:10,389 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:13:10,389 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 170 transitions. [2023-11-29 06:13:10,390 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 10.0) internal successors, (170), 17 states have internal predecessors, (170), 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 06:13:10,391 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 23.0) internal successors, (414), 18 states have internal predecessors, (414), 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 06:13:10,392 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 23.0) internal successors, (414), 18 states have internal predecessors, (414), 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 06:13:10,392 INFO L175 Difference]: Start difference. First operand has 110 places, 141 transitions, 1659 flow. Second operand 17 states and 170 transitions. [2023-11-29 06:13:10,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 263 transitions, 3258 flow [2023-11-29 06:13:10,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 263 transitions, 3094 flow, removed 48 selfloop flow, removed 1 redundant places. [2023-11-29 06:13:10,472 INFO L231 Difference]: Finished difference. Result has 130 places, 178 transitions, 2253 flow [2023-11-29 06:13:10,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=1572, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2253, PETRI_PLACES=130, PETRI_TRANSITIONS=178} [2023-11-29 06:13:10,473 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 105 predicate places. [2023-11-29 06:13:10,473 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 178 transitions, 2253 flow [2023-11-29 06:13:10,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.533333333333333) internal successors, (83), 15 states have internal predecessors, (83), 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 06:13:10,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:13:10,473 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] [2023-11-29 06:13:10,479 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 06:13:10,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-29 06:13:10,679 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:13:10,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:13:10,680 INFO L85 PathProgramCache]: Analyzing trace with hash 19111978, now seen corresponding path program 5 times [2023-11-29 06:13:10,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:13:10,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468122916] [2023-11-29 06:13:10,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:13:10,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:13:10,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:13:10,770 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:13:10,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:13:10,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468122916] [2023-11-29 06:13:10,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468122916] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:13:10,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143586026] [2023-11-29 06:13:10,771 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 06:13:10,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:13:10,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:13:10,772 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:13:10,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 06:13:10,849 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-29 06:13:10,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:13:10,850 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 06:13:10,852 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:13:10,918 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:13:10,919 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:13:10,978 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:13:10,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143586026] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:13:10,978 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:13:10,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-11-29 06:13:10,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121227342] [2023-11-29 06:13:10,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:13:10,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 06:13:10,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:13:10,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 06:13:10,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-11-29 06:13:11,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2023-11-29 06:13:11,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 178 transitions, 2253 flow. Second operand has 13 states, 13 states have (on average 6.153846153846154) internal successors, (80), 13 states have internal predecessors, (80), 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 06:13:11,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:13:11,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2023-11-29 06:13:11,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:13:11,957 INFO L124 PetriNetUnfolderBase]: 2272/3766 cut-off events. [2023-11-29 06:13:11,957 INFO L125 PetriNetUnfolderBase]: For 40746/40746 co-relation queries the response was YES. [2023-11-29 06:13:11,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22125 conditions, 3766 events. 2272/3766 cut-off events. For 40746/40746 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 20432 event pairs, 82 based on Foata normal form. 94/3860 useless extension candidates. Maximal degree in co-relation 21235. Up to 1175 conditions per place. [2023-11-29 06:13:11,992 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 145 selfloop transitions, 169 changer transitions 2/317 dead transitions. [2023-11-29 06:13:11,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 317 transitions, 4161 flow [2023-11-29 06:13:11,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 06:13:11,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-29 06:13:11,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 169 transitions. [2023-11-29 06:13:11,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4592391304347826 [2023-11-29 06:13:11,995 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 169 transitions. [2023-11-29 06:13:11,995 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 169 transitions. [2023-11-29 06:13:11,995 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:13:11,995 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 169 transitions. [2023-11-29 06:13:11,996 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 10.5625) internal successors, (169), 16 states have internal predecessors, (169), 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 06:13:11,997 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 23.0) internal successors, (391), 17 states have internal predecessors, (391), 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 06:13:11,998 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 23.0) internal successors, (391), 17 states have internal predecessors, (391), 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 06:13:11,998 INFO L175 Difference]: Start difference. First operand has 130 places, 178 transitions, 2253 flow. Second operand 16 states and 169 transitions. [2023-11-29 06:13:11,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 317 transitions, 4161 flow [2023-11-29 06:13:12,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 317 transitions, 3865 flow, removed 101 selfloop flow, removed 3 redundant places. [2023-11-29 06:13:12,108 INFO L231 Difference]: Finished difference. Result has 153 places, 231 transitions, 3376 flow [2023-11-29 06:13:12,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=2055, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3376, PETRI_PLACES=153, PETRI_TRANSITIONS=231} [2023-11-29 06:13:12,109 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 128 predicate places. [2023-11-29 06:13:12,109 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 231 transitions, 3376 flow [2023-11-29 06:13:12,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.153846153846154) internal successors, (80), 13 states have internal predecessors, (80), 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 06:13:12,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:13:12,110 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] [2023-11-29 06:13:12,115 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 06:13:12,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:13:12,311 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:13:12,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:13:12,312 INFO L85 PathProgramCache]: Analyzing trace with hash -974719262, now seen corresponding path program 6 times [2023-11-29 06:13:12,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:13:12,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996222387] [2023-11-29 06:13:12,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:13:12,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:13:12,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:13:12,421 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:13:12,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:13:12,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996222387] [2023-11-29 06:13:12,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996222387] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:13:12,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755710937] [2023-11-29 06:13:12,422 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 06:13:12,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:13:12,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:13:12,423 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:13:12,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 06:13:12,498 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-29 06:13:12,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:13:12,499 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 06:13:12,500 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:13:12,553 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:13:12,553 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:13:12,595 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:13:12,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755710937] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:13:12,596 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:13:12,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-11-29 06:13:12,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400224079] [2023-11-29 06:13:12,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:13:12,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 06:13:12,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:13:12,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 06:13:12,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-11-29 06:13:12,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2023-11-29 06:13:12,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 231 transitions, 3376 flow. Second operand has 12 states, 12 states have (on average 6.0) internal successors, (72), 12 states have internal predecessors, (72), 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 06:13:12,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:13:12,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2023-11-29 06:13:12,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:13:13,837 INFO L124 PetriNetUnfolderBase]: 2630/4352 cut-off events. [2023-11-29 06:13:13,837 INFO L125 PetriNetUnfolderBase]: For 61888/61888 co-relation queries the response was YES. [2023-11-29 06:13:13,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27300 conditions, 4352 events. 2630/4352 cut-off events. For 61888/61888 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 24253 event pairs, 81 based on Foata normal form. 94/4446 useless extension candidates. Maximal degree in co-relation 26659. Up to 759 conditions per place. [2023-11-29 06:13:13,881 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 175 selfloop transitions, 219 changer transitions 3/398 dead transitions. [2023-11-29 06:13:13,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 398 transitions, 5689 flow [2023-11-29 06:13:13,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-29 06:13:13,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-29 06:13:13,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 258 transitions. [2023-11-29 06:13:13,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.431438127090301 [2023-11-29 06:13:13,885 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 258 transitions. [2023-11-29 06:13:13,885 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 258 transitions. [2023-11-29 06:13:13,886 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:13:13,886 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 258 transitions. [2023-11-29 06:13:13,888 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 9.923076923076923) internal successors, (258), 26 states have internal predecessors, (258), 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 06:13:13,890 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 23.0) internal successors, (621), 27 states have internal predecessors, (621), 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 06:13:13,891 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 23.0) internal successors, (621), 27 states have internal predecessors, (621), 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 06:13:13,891 INFO L175 Difference]: Start difference. First operand has 153 places, 231 transitions, 3376 flow. Second operand 26 states and 258 transitions. [2023-11-29 06:13:13,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 398 transitions, 5689 flow [2023-11-29 06:13:14,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 398 transitions, 5608 flow, removed 26 selfloop flow, removed 2 redundant places. [2023-11-29 06:13:14,150 INFO L231 Difference]: Finished difference. Result has 189 places, 276 transitions, 4781 flow [2023-11-29 06:13:14,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=3249, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=4781, PETRI_PLACES=189, PETRI_TRANSITIONS=276} [2023-11-29 06:13:14,151 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 164 predicate places. [2023-11-29 06:13:14,151 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 276 transitions, 4781 flow [2023-11-29 06:13:14,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.0) internal successors, (72), 12 states have internal predecessors, (72), 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 06:13:14,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:13:14,151 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] [2023-11-29 06:13:14,156 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 06:13:14,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:13:14,352 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:13:14,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:13:14,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1987411794, now seen corresponding path program 7 times [2023-11-29 06:13:14,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:13:14,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193022158] [2023-11-29 06:13:14,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:13:14,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:13:14,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:13:14,457 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:13:14,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:13:14,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193022158] [2023-11-29 06:13:14,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193022158] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:13:14,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19247763] [2023-11-29 06:13:14,458 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 06:13:14,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:13:14,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:13:14,459 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:13:14,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 06:13:14,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:13:14,537 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 06:13:14,539 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:13:14,592 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:13:14,592 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:13:14,631 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:13:14,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19247763] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:13:14,631 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:13:14,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-11-29 06:13:14,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236379550] [2023-11-29 06:13:14,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:13:14,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 06:13:14,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:13:14,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 06:13:14,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-29 06:13:14,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2023-11-29 06:13:14,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 276 transitions, 4781 flow. Second operand has 12 states, 12 states have (on average 6.0) internal successors, (72), 12 states have internal predecessors, (72), 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 06:13:14,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:13:14,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2023-11-29 06:13:14,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:13:15,613 INFO L124 PetriNetUnfolderBase]: 2635/4371 cut-off events. [2023-11-29 06:13:15,613 INFO L125 PetriNetUnfolderBase]: For 94876/94876 co-relation queries the response was YES. [2023-11-29 06:13:15,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31537 conditions, 4371 events. 2635/4371 cut-off events. For 94876/94876 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 24638 event pairs, 314 based on Foata normal form. 8/4379 useless extension candidates. Maximal degree in co-relation 30771. Up to 1053 conditions per place. [2023-11-29 06:13:15,687 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 190 selfloop transitions, 154 changer transitions 3/348 dead transitions. [2023-11-29 06:13:15,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 348 transitions, 6152 flow [2023-11-29 06:13:15,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 06:13:15,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-29 06:13:15,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 142 transitions. [2023-11-29 06:13:15,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47491638795986624 [2023-11-29 06:13:15,689 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 142 transitions. [2023-11-29 06:13:15,689 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 142 transitions. [2023-11-29 06:13:15,689 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:13:15,689 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 142 transitions. [2023-11-29 06:13:15,690 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 10.923076923076923) internal successors, (142), 13 states have internal predecessors, (142), 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 06:13:15,691 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 23.0) internal successors, (322), 14 states have internal predecessors, (322), 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 06:13:15,691 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 23.0) internal successors, (322), 14 states have internal predecessors, (322), 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 06:13:15,691 INFO L175 Difference]: Start difference. First operand has 189 places, 276 transitions, 4781 flow. Second operand 13 states and 142 transitions. [2023-11-29 06:13:15,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 348 transitions, 6152 flow [2023-11-29 06:13:16,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 348 transitions, 5826 flow, removed 80 selfloop flow, removed 15 redundant places. [2023-11-29 06:13:16,078 INFO L231 Difference]: Finished difference. Result has 185 places, 275 transitions, 4786 flow [2023-11-29 06:13:16,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=4439, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4786, PETRI_PLACES=185, PETRI_TRANSITIONS=275} [2023-11-29 06:13:16,079 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 160 predicate places. [2023-11-29 06:13:16,080 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 275 transitions, 4786 flow [2023-11-29 06:13:16,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.0) internal successors, (72), 12 states have internal predecessors, (72), 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 06:13:16,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:13:16,080 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] [2023-11-29 06:13:16,084 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 06:13:16,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 06:13:16,281 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:13:16,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:13:16,281 INFO L85 PathProgramCache]: Analyzing trace with hash -2015572216, now seen corresponding path program 8 times [2023-11-29 06:13:16,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:13:16,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684795193] [2023-11-29 06:13:16,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:13:16,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:13:16,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:13:16,368 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:13:16,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:13:16,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684795193] [2023-11-29 06:13:16,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684795193] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:13:16,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078546497] [2023-11-29 06:13:16,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:13:16,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:13:16,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:13:16,370 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:13:16,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 06:13:16,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:13:16,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:13:16,459 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 06:13:16,461 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:13:16,530 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:13:16,530 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:13:16,577 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:13:16,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078546497] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:13:16,577 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:13:16,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-11-29 06:13:16,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046997451] [2023-11-29 06:13:16,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:13:16,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 06:13:16,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:13:16,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 06:13:16,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2023-11-29 06:13:16,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2023-11-29 06:13:16,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 275 transitions, 4786 flow. Second operand has 13 states, 13 states have (on average 6.0) internal successors, (78), 13 states have internal predecessors, (78), 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 06:13:16,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:13:16,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2023-11-29 06:13:16,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:13:17,789 INFO L124 PetriNetUnfolderBase]: 2996/4964 cut-off events. [2023-11-29 06:13:17,789 INFO L125 PetriNetUnfolderBase]: For 117217/117217 co-relation queries the response was YES. [2023-11-29 06:13:17,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36552 conditions, 4964 events. 2996/4964 cut-off events. For 117217/117217 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 28432 event pairs, 173 based on Foata normal form. 58/5022 useless extension candidates. Maximal degree in co-relation 34457. Up to 931 conditions per place. [2023-11-29 06:13:17,833 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 162 selfloop transitions, 293 changer transitions 6/462 dead transitions. [2023-11-29 06:13:17,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 462 transitions, 7957 flow [2023-11-29 06:13:17,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-29 06:13:17,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-29 06:13:17,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 247 transitions. [2023-11-29 06:13:17,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41304347826086957 [2023-11-29 06:13:17,836 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 247 transitions. [2023-11-29 06:13:17,836 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 247 transitions. [2023-11-29 06:13:17,836 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:13:17,836 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 247 transitions. [2023-11-29 06:13:17,837 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 9.5) internal successors, (247), 26 states have internal predecessors, (247), 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 06:13:17,839 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 23.0) internal successors, (621), 27 states have internal predecessors, (621), 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 06:13:17,839 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 23.0) internal successors, (621), 27 states have internal predecessors, (621), 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 06:13:17,839 INFO L175 Difference]: Start difference. First operand has 185 places, 275 transitions, 4786 flow. Second operand 26 states and 247 transitions. [2023-11-29 06:13:17,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 462 transitions, 7957 flow [2023-11-29 06:13:18,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 462 transitions, 7565 flow, removed 35 selfloop flow, removed 12 redundant places. [2023-11-29 06:13:18,317 INFO L231 Difference]: Finished difference. Result has 204 places, 355 transitions, 6828 flow [2023-11-29 06:13:18,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=4454, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=218, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=6828, PETRI_PLACES=204, PETRI_TRANSITIONS=355} [2023-11-29 06:13:18,318 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 179 predicate places. [2023-11-29 06:13:18,318 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 355 transitions, 6828 flow [2023-11-29 06:13:18,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.0) internal successors, (78), 13 states have internal predecessors, (78), 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 06:13:18,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:13:18,318 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] [2023-11-29 06:13:18,322 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 06:13:18,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 06:13:18,519 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:13:18,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:13:18,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1830470982, now seen corresponding path program 9 times [2023-11-29 06:13:18,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:13:18,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782703816] [2023-11-29 06:13:18,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:13:18,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:13:18,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:13:18,603 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:13:18,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:13:18,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782703816] [2023-11-29 06:13:18,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782703816] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:13:18,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376422357] [2023-11-29 06:13:18,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 06:13:18,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:13:18,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:13:18,605 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:13:18,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 06:13:18,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 06:13:18,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:13:18,686 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 06:13:18,688 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:13:18,768 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:13:18,768 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:13:18,829 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:13:18,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376422357] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:13:18,829 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:13:18,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-29 06:13:18,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421574716] [2023-11-29 06:13:18,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:13:18,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 06:13:18,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:13:18,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 06:13:18,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2023-11-29 06:13:18,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2023-11-29 06:13:18,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 355 transitions, 6828 flow. Second operand has 15 states, 15 states have (on average 6.133333333333334) internal successors, (92), 15 states have internal predecessors, (92), 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 06:13:18,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:13:18,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2023-11-29 06:13:18,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:13:20,839 INFO L124 PetriNetUnfolderBase]: 3435/5773 cut-off events. [2023-11-29 06:13:20,839 INFO L125 PetriNetUnfolderBase]: For 155240/155240 co-relation queries the response was YES. [2023-11-29 06:13:20,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45157 conditions, 5773 events. 3435/5773 cut-off events. For 155240/155240 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 34657 event pairs, 156 based on Foata normal form. 34/5807 useless extension candidates. Maximal degree in co-relation 42130. Up to 1116 conditions per place. [2023-11-29 06:13:20,883 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 249 selfloop transitions, 330 changer transitions 5/585 dead transitions. [2023-11-29 06:13:20,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 585 transitions, 11094 flow [2023-11-29 06:13:20,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-29 06:13:20,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-29 06:13:20,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 282 transitions. [2023-11-29 06:13:20,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42278860569715143 [2023-11-29 06:13:20,885 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 282 transitions. [2023-11-29 06:13:20,885 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 282 transitions. [2023-11-29 06:13:20,885 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:13:20,885 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 282 transitions. [2023-11-29 06:13:20,886 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 9.724137931034482) internal successors, (282), 29 states have internal predecessors, (282), 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 06:13:20,888 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 23.0) internal successors, (690), 30 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:13:20,888 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 23.0) internal successors, (690), 30 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:13:20,888 INFO L175 Difference]: Start difference. First operand has 204 places, 355 transitions, 6828 flow. Second operand 29 states and 282 transitions. [2023-11-29 06:13:20,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 585 transitions, 11094 flow [2023-11-29 06:13:21,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 585 transitions, 10643 flow, removed 114 selfloop flow, removed 11 redundant places. [2023-11-29 06:13:21,687 INFO L231 Difference]: Finished difference. Result has 227 places, 430 transitions, 9115 flow [2023-11-29 06:13:21,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=6448, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=254, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=9115, PETRI_PLACES=227, PETRI_TRANSITIONS=430} [2023-11-29 06:13:21,688 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 202 predicate places. [2023-11-29 06:13:21,688 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 430 transitions, 9115 flow [2023-11-29 06:13:21,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.133333333333334) internal successors, (92), 15 states have internal predecessors, (92), 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 06:13:21,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:13:21,689 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] [2023-11-29 06:13:21,780 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 06:13:21,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 06:13:21,889 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:13:21,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:13:21,890 INFO L85 PathProgramCache]: Analyzing trace with hash -546398446, now seen corresponding path program 10 times [2023-11-29 06:13:21,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:13:21,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980573056] [2023-11-29 06:13:21,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:13:21,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:13:21,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:13:21,964 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:13:21,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:13:21,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980573056] [2023-11-29 06:13:21,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980573056] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:13:21,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960729129] [2023-11-29 06:13:21,965 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 06:13:21,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:13:21,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:13:21,966 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:13:21,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 06:13:22,040 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 06:13:22,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:13:22,041 INFO L262 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 06:13:22,042 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:13:22,108 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:13:22,108 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:13:22,156 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:13:22,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960729129] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:13:22,157 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:13:22,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-29 06:13:22,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700919135] [2023-11-29 06:13:22,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:13:22,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 06:13:22,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:13:22,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 06:13:22,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2023-11-29 06:13:22,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2023-11-29 06:13:22,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 430 transitions, 9115 flow. Second operand has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 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 06:13:22,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:13:22,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2023-11-29 06:13:22,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:13:23,752 INFO L124 PetriNetUnfolderBase]: 3862/6460 cut-off events. [2023-11-29 06:13:23,752 INFO L125 PetriNetUnfolderBase]: For 216933/216933 co-relation queries the response was YES. [2023-11-29 06:13:23,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53092 conditions, 6460 events. 3862/6460 cut-off events. For 216933/216933 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 39513 event pairs, 1368 based on Foata normal form. 18/6478 useless extension candidates. Maximal degree in co-relation 50479. Up to 4947 conditions per place. [2023-11-29 06:13:23,818 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 473 selfloop transitions, 72 changer transitions 2/548 dead transitions. [2023-11-29 06:13:23,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 548 transitions, 11724 flow [2023-11-29 06:13:23,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 06:13:23,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-29 06:13:23,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 159 transitions. [2023-11-29 06:13:23,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4320652173913043 [2023-11-29 06:13:23,820 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 159 transitions. [2023-11-29 06:13:23,820 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 159 transitions. [2023-11-29 06:13:23,820 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:13:23,820 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 159 transitions. [2023-11-29 06:13:23,821 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 9.9375) internal successors, (159), 16 states have internal predecessors, (159), 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 06:13:23,822 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 23.0) internal successors, (391), 17 states have internal predecessors, (391), 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 06:13:23,822 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 23.0) internal successors, (391), 17 states have internal predecessors, (391), 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 06:13:23,823 INFO L175 Difference]: Start difference. First operand has 227 places, 430 transitions, 9115 flow. Second operand 16 states and 159 transitions. [2023-11-29 06:13:23,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 548 transitions, 11724 flow [2023-11-29 06:13:25,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 548 transitions, 11467 flow, removed 58 selfloop flow, removed 13 redundant places. [2023-11-29 06:13:25,357 INFO L231 Difference]: Finished difference. Result has 235 places, 463 transitions, 9724 flow [2023-11-29 06:13:25,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=8876, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=9724, PETRI_PLACES=235, PETRI_TRANSITIONS=463} [2023-11-29 06:13:25,358 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 210 predicate places. [2023-11-29 06:13:25,358 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 463 transitions, 9724 flow [2023-11-29 06:13:25,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 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 06:13:25,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:13:25,358 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] [2023-11-29 06:13:25,362 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 06:13:25,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 06:13:25,559 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:13:25,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:13:25,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1154419878, now seen corresponding path program 11 times [2023-11-29 06:13:25,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:13:25,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261467876] [2023-11-29 06:13:25,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:13:25,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:13:25,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:13:25,644 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:13:25,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:13:25,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261467876] [2023-11-29 06:13:25,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261467876] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:13:25,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736052645] [2023-11-29 06:13:25,645 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 06:13:25,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:13:25,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:13:25,647 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:13:25,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 06:13:25,717 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-29 06:13:25,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:13:25,718 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 06:13:25,719 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:13:25,783 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:13:25,783 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:13:25,834 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:13:25,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736052645] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:13:25,834 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:13:25,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-29 06:13:25,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462256854] [2023-11-29 06:13:25,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:13:25,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 06:13:25,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:13:25,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 06:13:25,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-11-29 06:13:25,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2023-11-29 06:13:25,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 463 transitions, 9724 flow. Second operand has 15 states, 15 states have (on average 5.866666666666666) internal successors, (88), 15 states have internal predecessors, (88), 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 06:13:25,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:13:25,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2023-11-29 06:13:25,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:13:27,944 INFO L124 PetriNetUnfolderBase]: 4237/7063 cut-off events. [2023-11-29 06:13:27,944 INFO L125 PetriNetUnfolderBase]: For 272331/272331 co-relation queries the response was YES. [2023-11-29 06:13:27,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60159 conditions, 7063 events. 4237/7063 cut-off events. For 272331/272331 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 43641 event pairs, 644 based on Foata normal form. 90/7153 useless extension candidates. Maximal degree in co-relation 57507. Up to 3105 conditions per place. [2023-11-29 06:13:28,031 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 364 selfloop transitions, 253 changer transitions 3/621 dead transitions. [2023-11-29 06:13:28,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 621 transitions, 13165 flow [2023-11-29 06:13:28,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-29 06:13:28,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-29 06:13:28,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 212 transitions. [2023-11-29 06:13:28,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4608695652173913 [2023-11-29 06:13:28,033 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 212 transitions. [2023-11-29 06:13:28,033 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 212 transitions. [2023-11-29 06:13:28,033 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:13:28,033 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 212 transitions. [2023-11-29 06:13:28,034 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 10.6) internal successors, (212), 20 states have internal predecessors, (212), 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 06:13:28,035 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 23.0) internal successors, (483), 21 states have internal predecessors, (483), 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 06:13:28,035 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 23.0) internal successors, (483), 21 states have internal predecessors, (483), 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 06:13:28,035 INFO L175 Difference]: Start difference. First operand has 235 places, 463 transitions, 9724 flow. Second operand 20 states and 212 transitions. [2023-11-29 06:13:28,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 621 transitions, 13165 flow [2023-11-29 06:13:29,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 621 transitions, 12846 flow, removed 123 selfloop flow, removed 7 redundant places. [2023-11-29 06:13:29,649 INFO L231 Difference]: Finished difference. Result has 259 places, 497 transitions, 11343 flow [2023-11-29 06:13:29,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=9440, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=222, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=11343, PETRI_PLACES=259, PETRI_TRANSITIONS=497} [2023-11-29 06:13:29,649 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 234 predicate places. [2023-11-29 06:13:29,649 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 497 transitions, 11343 flow [2023-11-29 06:13:29,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.866666666666666) internal successors, (88), 15 states have internal predecessors, (88), 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 06:13:29,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:13:29,650 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] [2023-11-29 06:13:29,655 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 06:13:29,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 06:13:29,850 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:13:29,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:13:29,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1929441302, now seen corresponding path program 12 times [2023-11-29 06:13:29,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:13:29,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132224916] [2023-11-29 06:13:29,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:13:29,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:13:29,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:13:29,920 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:13:29,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:13:29,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132224916] [2023-11-29 06:13:29,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132224916] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:13:29,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45683219] [2023-11-29 06:13:29,921 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 06:13:29,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:13:29,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:13:29,923 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:13:29,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 06:13:30,005 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-29 06:13:30,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:13:30,006 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 06:13:30,007 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:13:30,063 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:13:30,063 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:13:30,103 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:13:30,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45683219] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:13:30,103 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:13:30,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-11-29 06:13:30,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166059975] [2023-11-29 06:13:30,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:13:30,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 06:13:30,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:13:30,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 06:13:30,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2023-11-29 06:13:30,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2023-11-29 06:13:30,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 497 transitions, 11343 flow. Second operand has 13 states, 13 states have (on average 6.153846153846154) internal successors, (80), 13 states have internal predecessors, (80), 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 06:13:30,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:13:30,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2023-11-29 06:13:30,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:13:32,425 INFO L124 PetriNetUnfolderBase]: 4451/7411 cut-off events. [2023-11-29 06:13:32,426 INFO L125 PetriNetUnfolderBase]: For 348961/348961 co-relation queries the response was YES. [2023-11-29 06:13:32,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67864 conditions, 7411 events. 4451/7411 cut-off events. For 348961/348961 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 45962 event pairs, 629 based on Foata normal form. 58/7469 useless extension candidates. Maximal degree in co-relation 67233. Up to 2890 conditions per place. [2023-11-29 06:13:32,517 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 334 selfloop transitions, 284 changer transitions 2/621 dead transitions. [2023-11-29 06:13:32,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 621 transitions, 14315 flow [2023-11-29 06:13:32,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-29 06:13:32,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-29 06:13:32,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 191 transitions. [2023-11-29 06:13:32,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4152173913043478 [2023-11-29 06:13:32,519 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 191 transitions. [2023-11-29 06:13:32,519 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 191 transitions. [2023-11-29 06:13:32,519 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:13:32,519 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 191 transitions. [2023-11-29 06:13:32,520 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 9.55) internal successors, (191), 20 states have internal predecessors, (191), 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 06:13:32,521 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 23.0) internal successors, (483), 21 states have internal predecessors, (483), 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 06:13:32,521 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 23.0) internal successors, (483), 21 states have internal predecessors, (483), 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 06:13:32,521 INFO L175 Difference]: Start difference. First operand has 259 places, 497 transitions, 11343 flow. Second operand 20 states and 191 transitions. [2023-11-29 06:13:32,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 621 transitions, 14315 flow [2023-11-29 06:13:34,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 621 transitions, 14018 flow, removed 133 selfloop flow, removed 3 redundant places. [2023-11-29 06:13:34,289 INFO L231 Difference]: Finished difference. Result has 282 places, 520 transitions, 12769 flow [2023-11-29 06:13:34,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=11111, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=262, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=12769, PETRI_PLACES=282, PETRI_TRANSITIONS=520} [2023-11-29 06:13:34,290 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 257 predicate places. [2023-11-29 06:13:34,290 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 520 transitions, 12769 flow [2023-11-29 06:13:34,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.153846153846154) internal successors, (80), 13 states have internal predecessors, (80), 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 06:13:34,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:13:34,290 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] [2023-11-29 06:13:34,294 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 06:13:34,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:13:34,490 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:13:34,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:13:34,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1080287978, now seen corresponding path program 13 times [2023-11-29 06:13:34,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:13:34,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759354253] [2023-11-29 06:13:34,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:13:34,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:13:34,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:13:34,558 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:13:34,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:13:34,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759354253] [2023-11-29 06:13:34,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759354253] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:13:34,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011543920] [2023-11-29 06:13:34,559 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 06:13:34,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:13:34,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:13:34,560 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:13:34,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 06:13:34,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:13:34,637 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 06:13:34,638 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:13:34,692 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:13:34,692 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:13:34,718 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:13:34,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011543920] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:13:34,718 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:13:34,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-11-29 06:13:34,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12412268] [2023-11-29 06:13:34,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:13:34,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 06:13:34,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:13:34,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 06:13:34,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-11-29 06:13:34,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2023-11-29 06:13:34,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 520 transitions, 12769 flow. Second operand has 13 states, 13 states have (on average 6.0) internal successors, (78), 13 states have internal predecessors, (78), 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 06:13:34,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:13:34,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2023-11-29 06:13:34,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:13:36,911 INFO L124 PetriNetUnfolderBase]: 4448/7406 cut-off events. [2023-11-29 06:13:36,911 INFO L125 PetriNetUnfolderBase]: For 385402/385402 co-relation queries the response was YES. [2023-11-29 06:13:36,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71141 conditions, 7406 events. 4448/7406 cut-off events. For 385402/385402 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 46149 event pairs, 1649 based on Foata normal form. 8/7414 useless extension candidates. Maximal degree in co-relation 70369. Up to 5976 conditions per place. [2023-11-29 06:13:36,991 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 502 selfloop transitions, 71 changer transitions 2/576 dead transitions. [2023-11-29 06:13:36,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 576 transitions, 14570 flow [2023-11-29 06:13:36,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 06:13:36,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-29 06:13:36,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 117 transitions. [2023-11-29 06:13:36,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4624505928853755 [2023-11-29 06:13:36,992 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 117 transitions. [2023-11-29 06:13:36,992 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 117 transitions. [2023-11-29 06:13:36,992 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:13:36,992 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 117 transitions. [2023-11-29 06:13:36,992 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 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 06:13:36,993 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 23.0) internal successors, (276), 12 states have internal predecessors, (276), 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 06:13:36,993 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 23.0) internal successors, (276), 12 states have internal predecessors, (276), 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 06:13:36,993 INFO L175 Difference]: Start difference. First operand has 282 places, 520 transitions, 12769 flow. Second operand 11 states and 117 transitions. [2023-11-29 06:13:36,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 576 transitions, 14570 flow [2023-11-29 06:13:39,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 576 transitions, 14375 flow, removed 63 selfloop flow, removed 13 redundant places. [2023-11-29 06:13:39,225 INFO L231 Difference]: Finished difference. Result has 277 places, 517 transitions, 12715 flow [2023-11-29 06:13:39,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=12550, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12715, PETRI_PLACES=277, PETRI_TRANSITIONS=517} [2023-11-29 06:13:39,226 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 252 predicate places. [2023-11-29 06:13:39,226 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 517 transitions, 12715 flow [2023-11-29 06:13:39,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.0) internal successors, (78), 13 states have internal predecessors, (78), 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 06:13:39,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:13:39,226 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:13:39,230 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 06:13:39,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:13:39,427 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:13:39,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:13:39,427 INFO L85 PathProgramCache]: Analyzing trace with hash 448322125, now seen corresponding path program 14 times [2023-11-29 06:13:39,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:13:39,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822749179] [2023-11-29 06:13:39,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:13:39,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:13:39,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:13:39,499 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:13:39,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:13:39,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822749179] [2023-11-29 06:13:39,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822749179] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:13:39,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446436405] [2023-11-29 06:13:39,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:13:39,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:13:39,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:13:39,501 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:13:39,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 06:13:39,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:13:39,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:13:39,581 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 06:13:39,582 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:13:39,607 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:13:39,607 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:13:39,636 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:13:39,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446436405] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:13:39,636 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:13:39,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2023-11-29 06:13:39,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903791130] [2023-11-29 06:13:39,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:13:39,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 06:13:39,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:13:39,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 06:13:39,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 06:13:39,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 23 [2023-11-29 06:13:39,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 517 transitions, 12715 flow. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 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 06:13:39,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:13:39,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 23 [2023-11-29 06:13:39,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:13:42,698 INFO L124 PetriNetUnfolderBase]: 5893/10674 cut-off events. [2023-11-29 06:13:42,698 INFO L125 PetriNetUnfolderBase]: For 546993/547580 co-relation queries the response was YES. [2023-11-29 06:13:42,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100240 conditions, 10674 events. 5893/10674 cut-off events. For 546993/547580 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 81305 event pairs, 591 based on Foata normal form. 305/10876 useless extension candidates. Maximal degree in co-relation 98389. Up to 2741 conditions per place. [2023-11-29 06:13:42,841 INFO L140 encePairwiseOnDemand]: 19/23 looper letters, 898 selfloop transitions, 10 changer transitions 101/1170 dead transitions. [2023-11-29 06:13:42,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 1170 transitions, 31296 flow [2023-11-29 06:13:42,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 06:13:42,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 06:13:42,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 84 transitions. [2023-11-29 06:13:42,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7304347826086957 [2023-11-29 06:13:42,842 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 84 transitions. [2023-11-29 06:13:42,842 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 84 transitions. [2023-11-29 06:13:42,842 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:13:42,842 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 84 transitions. [2023-11-29 06:13:42,843 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 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 06:13:42,843 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 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 06:13:42,843 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 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 06:13:42,843 INFO L175 Difference]: Start difference. First operand has 277 places, 517 transitions, 12715 flow. Second operand 5 states and 84 transitions. [2023-11-29 06:13:42,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 1170 transitions, 31296 flow [2023-11-29 06:13:47,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 1170 transitions, 31042 flow, removed 1 selfloop flow, removed 6 redundant places. [2023-11-29 06:13:47,395 INFO L231 Difference]: Finished difference. Result has 274 places, 513 transitions, 12428 flow [2023-11-29 06:13:47,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=12606, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=510, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=12428, PETRI_PLACES=274, PETRI_TRANSITIONS=513} [2023-11-29 06:13:47,396 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 249 predicate places. [2023-11-29 06:13:47,396 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 513 transitions, 12428 flow [2023-11-29 06:13:47,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 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 06:13:47,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:13:47,396 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:13:47,400 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 06:13:47,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:13:47,596 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:13:47,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:13:47,597 INFO L85 PathProgramCache]: Analyzing trace with hash 406753951, now seen corresponding path program 15 times [2023-11-29 06:13:47,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:13:47,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888858933] [2023-11-29 06:13:47,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:13:47,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:13:47,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:13:47,711 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:13:47,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:13:47,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888858933] [2023-11-29 06:13:47,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888858933] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:13:47,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086044179] [2023-11-29 06:13:47,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 06:13:47,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:13:47,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:13:47,713 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:13:47,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 06:13:47,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-11-29 06:13:47,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:13:47,806 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 06:13:47,808 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:13:47,935 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:13:47,935 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:13:48,029 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:13:48,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086044179] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:13:48,030 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:13:48,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2023-11-29 06:13:48,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359144465] [2023-11-29 06:13:48,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:13:48,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 06:13:48,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:13:48,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 06:13:48,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2023-11-29 06:13:48,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2023-11-29 06:13:48,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 513 transitions, 12428 flow. Second operand has 20 states, 20 states have (on average 6.35) internal successors, (127), 20 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) [2023-11-29 06:13:48,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:13:48,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2023-11-29 06:13:48,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:13:53,561 INFO L124 PetriNetUnfolderBase]: 10617/17506 cut-off events. [2023-11-29 06:13:53,562 INFO L125 PetriNetUnfolderBase]: For 982066/982066 co-relation queries the response was YES. [2023-11-29 06:13:53,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 176459 conditions, 17506 events. 10617/17506 cut-off events. For 982066/982066 co-relation queries the response was YES. Maximal size of possible extension queue 686. Compared 122411 event pairs, 440 based on Foata normal form. 196/17702 useless extension candidates. Maximal degree in co-relation 174500. Up to 3452 conditions per place. [2023-11-29 06:13:53,776 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 479 selfloop transitions, 612 changer transitions 31/1123 dead transitions. [2023-11-29 06:13:53,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 1123 transitions, 26868 flow [2023-11-29 06:13:53,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-11-29 06:13:53,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-11-29 06:13:53,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 431 transitions. [2023-11-29 06:13:53,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4258893280632411 [2023-11-29 06:13:53,778 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 431 transitions. [2023-11-29 06:13:53,778 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 431 transitions. [2023-11-29 06:13:53,778 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:13:53,778 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 431 transitions. [2023-11-29 06:13:53,779 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 9.795454545454545) internal successors, (431), 44 states have internal predecessors, (431), 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 06:13:53,781 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 23.0) internal successors, (1035), 45 states have internal predecessors, (1035), 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 06:13:53,781 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 23.0) internal successors, (1035), 45 states have internal predecessors, (1035), 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 06:13:53,781 INFO L175 Difference]: Start difference. First operand has 274 places, 513 transitions, 12428 flow. Second operand 44 states and 431 transitions. [2023-11-29 06:13:53,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 1123 transitions, 26868 flow [2023-11-29 06:14:02,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 1123 transitions, 26486 flow, removed 191 selfloop flow, removed 0 redundant places. [2023-11-29 06:14:02,689 INFO L231 Difference]: Finished difference. Result has 337 places, 749 transitions, 21070 flow [2023-11-29 06:14:02,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=12408, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=379, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=21070, PETRI_PLACES=337, PETRI_TRANSITIONS=749} [2023-11-29 06:14:02,690 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 312 predicate places. [2023-11-29 06:14:02,690 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 749 transitions, 21070 flow [2023-11-29 06:14:02,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 6.35) internal successors, (127), 20 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) [2023-11-29 06:14:02,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:14:02,691 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:14:02,694 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 06:14:02,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:14:02,891 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:14:02,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:14:02,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1496431767, now seen corresponding path program 16 times [2023-11-29 06:14:02,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:14:02,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205662854] [2023-11-29 06:14:02,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:14:02,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:14:02,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:14:02,981 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:14:02,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:14:02,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205662854] [2023-11-29 06:14:02,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205662854] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:14:02,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576981895] [2023-11-29 06:14:02,981 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 06:14:02,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:14:02,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:14:02,983 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:14:02,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 06:14:03,058 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 06:14:03,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:14:03,060 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 06:14:03,061 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:14:03,132 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:14:03,133 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:14:03,202 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:14:03,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576981895] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:14:03,202 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:14:03,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-11-29 06:14:03,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723071568] [2023-11-29 06:14:03,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:14:03,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 06:14:03,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:14:03,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 06:14:03,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2023-11-29 06:14:03,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2023-11-29 06:14:03,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 749 transitions, 21070 flow. Second operand has 14 states, 14 states have (on average 6.142857142857143) internal successors, (86), 14 states have internal predecessors, (86), 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 06:14:03,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:14:03,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2023-11-29 06:14:03,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:14:11,609 INFO L124 PetriNetUnfolderBase]: 12866/21199 cut-off events. [2023-11-29 06:14:11,609 INFO L125 PetriNetUnfolderBase]: For 1562893/1562893 co-relation queries the response was YES. [2023-11-29 06:14:11,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 233001 conditions, 21199 events. 12866/21199 cut-off events. For 1562893/1562893 co-relation queries the response was YES. Maximal size of possible extension queue 794. Compared 151351 event pairs, 626 based on Foata normal form. 74/21273 useless extension candidates. Maximal degree in co-relation 230654. Up to 6748 conditions per place. [2023-11-29 06:14:11,944 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 449 selfloop transitions, 886 changer transitions 89/1425 dead transitions. [2023-11-29 06:14:11,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 1425 transitions, 40420 flow [2023-11-29 06:14:11,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 06:14:11,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-29 06:14:11,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 193 transitions. [2023-11-29 06:14:11,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4416475972540046 [2023-11-29 06:14:11,945 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 193 transitions. [2023-11-29 06:14:11,945 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 193 transitions. [2023-11-29 06:14:11,946 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:14:11,946 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 193 transitions. [2023-11-29 06:14:11,946 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 10.157894736842104) internal successors, (193), 19 states have internal predecessors, (193), 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 06:14:11,947 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 23.0) internal successors, (460), 20 states have internal predecessors, (460), 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 06:14:11,947 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 23.0) internal successors, (460), 20 states have internal predecessors, (460), 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 06:14:11,947 INFO L175 Difference]: Start difference. First operand has 337 places, 749 transitions, 21070 flow. Second operand 19 states and 193 transitions. [2023-11-29 06:14:11,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 1425 transitions, 40420 flow [2023-11-29 06:14:28,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 1425 transitions, 38536 flow, removed 538 selfloop flow, removed 16 redundant places. [2023-11-29 06:14:28,920 INFO L231 Difference]: Finished difference. Result has 348 places, 1132 transitions, 34170 flow [2023-11-29 06:14:28,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=20210, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=749, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=512, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=34170, PETRI_PLACES=348, PETRI_TRANSITIONS=1132} [2023-11-29 06:14:28,921 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 323 predicate places. [2023-11-29 06:14:28,921 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 1132 transitions, 34170 flow [2023-11-29 06:14:28,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.142857142857143) internal successors, (86), 14 states have internal predecessors, (86), 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 06:14:28,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:14:28,922 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:14:28,926 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-29 06:14:29,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:14:29,122 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:14:29,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:14:29,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1672523643, now seen corresponding path program 17 times [2023-11-29 06:14:29,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:14:29,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978910789] [2023-11-29 06:14:29,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:14:29,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:14:29,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:14:29,199 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:14:29,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:14:29,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978910789] [2023-11-29 06:14:29,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978910789] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:14:29,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183576617] [2023-11-29 06:14:29,199 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 06:14:29,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:14:29,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:14:29,201 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:14:29,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 06:14:29,289 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-11-29 06:14:29,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:14:29,290 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 06:14:29,291 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:14:29,382 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:14:29,382 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:14:29,439 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:14:29,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183576617] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:14:29,439 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:14:29,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-11-29 06:14:29,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194311427] [2023-11-29 06:14:29,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:14:29,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 06:14:29,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:14:29,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 06:14:29,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-11-29 06:14:29,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2023-11-29 06:14:29,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 1132 transitions, 34170 flow. Second operand has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 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 06:14:29,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:14:29,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2023-11-29 06:14:29,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:14:42,440 INFO L124 PetriNetUnfolderBase]: 15920/25987 cut-off events. [2023-11-29 06:14:42,440 INFO L125 PetriNetUnfolderBase]: For 2089469/2089469 co-relation queries the response was YES. [2023-11-29 06:14:42,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 296527 conditions, 25987 events. 15920/25987 cut-off events. For 2089469/2089469 co-relation queries the response was YES. Maximal size of possible extension queue 877. Compared 188294 event pairs, 1418 based on Foata normal form. 58/26045 useless extension candidates. Maximal degree in co-relation 294169. Up to 6316 conditions per place. [2023-11-29 06:14:42,885 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 748 selfloop transitions, 775 changer transitions 10/1534 dead transitions. [2023-11-29 06:14:42,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 1534 transitions, 46420 flow [2023-11-29 06:14:42,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-29 06:14:42,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-29 06:14:42,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 219 transitions. [2023-11-29 06:14:42,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.453416149068323 [2023-11-29 06:14:42,887 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 219 transitions. [2023-11-29 06:14:42,887 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 219 transitions. [2023-11-29 06:14:42,887 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:14:42,887 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 219 transitions. [2023-11-29 06:14:42,887 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 10.428571428571429) internal successors, (219), 21 states have internal predecessors, (219), 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 06:14:42,888 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 23.0) internal successors, (506), 22 states have internal predecessors, (506), 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 06:14:42,888 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 23.0) internal successors, (506), 22 states have internal predecessors, (506), 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 06:14:42,888 INFO L175 Difference]: Start difference. First operand has 348 places, 1132 transitions, 34170 flow. Second operand 21 states and 219 transitions. [2023-11-29 06:14:42,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 1534 transitions, 46420 flow [2023-11-29 06:15:07,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 1534 transitions, 46026 flow, removed 177 selfloop flow, removed 5 redundant places. [2023-11-29 06:15:07,509 INFO L231 Difference]: Finished difference. Result has 371 places, 1288 transitions, 40667 flow [2023-11-29 06:15:07,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=33980, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=625, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=504, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=40667, PETRI_PLACES=371, PETRI_TRANSITIONS=1288} [2023-11-29 06:15:07,510 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 346 predicate places. [2023-11-29 06:15:07,510 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 1288 transitions, 40667 flow [2023-11-29 06:15:07,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 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 06:15:07,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:15:07,510 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:15:07,514 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 06:15:07,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-29 06:15:07,711 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:15:07,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:15:07,711 INFO L85 PathProgramCache]: Analyzing trace with hash -605021013, now seen corresponding path program 18 times [2023-11-29 06:15:07,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:15:07,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785080697] [2023-11-29 06:15:07,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:15:07,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:15:07,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:15:07,806 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:15:07,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:15:07,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785080697] [2023-11-29 06:15:07,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785080697] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:15:07,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134744190] [2023-11-29 06:15:07,806 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 06:15:07,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:15:07,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:15:07,808 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:15:07,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 06:15:07,895 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-29 06:15:07,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:15:07,896 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 06:15:07,897 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:15:07,989 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:15:07,989 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:15:08,062 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:15:08,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134744190] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:15:08,062 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:15:08,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-11-29 06:15:08,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172380415] [2023-11-29 06:15:08,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:15:08,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 06:15:08,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:15:08,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 06:15:08,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2023-11-29 06:15:08,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2023-11-29 06:15:08,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 1288 transitions, 40667 flow. Second operand has 16 states, 16 states have (on average 6.625) internal successors, (106), 16 states have internal predecessors, (106), 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 06:15:08,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:15:08,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2023-11-29 06:15:08,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:15:25,596 INFO L124 PetriNetUnfolderBase]: 18862/30855 cut-off events. [2023-11-29 06:15:25,596 INFO L125 PetriNetUnfolderBase]: For 2699392/2699392 co-relation queries the response was YES. [2023-11-29 06:15:25,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 366999 conditions, 30855 events. 18862/30855 cut-off events. For 2699392/2699392 co-relation queries the response was YES. Maximal size of possible extension queue 1021. Compared 228689 event pairs, 1112 based on Foata normal form. 146/31001 useless extension candidates. Maximal degree in co-relation 364825. Up to 10636 conditions per place. [2023-11-29 06:15:26,147 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 628 selfloop transitions, 1274 changer transitions 9/1912 dead transitions. [2023-11-29 06:15:26,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 1912 transitions, 61598 flow [2023-11-29 06:15:26,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-29 06:15:26,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-29 06:15:26,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 226 transitions. [2023-11-29 06:15:26,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44664031620553357 [2023-11-29 06:15:26,148 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 226 transitions. [2023-11-29 06:15:26,148 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 226 transitions. [2023-11-29 06:15:26,148 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:15:26,149 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 226 transitions. [2023-11-29 06:15:26,149 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 10.272727272727273) internal successors, (226), 22 states have internal predecessors, (226), 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 06:15:26,150 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 23.0) internal successors, (529), 23 states have internal predecessors, (529), 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 06:15:26,150 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 23.0) internal successors, (529), 23 states have internal predecessors, (529), 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 06:15:26,150 INFO L175 Difference]: Start difference. First operand has 371 places, 1288 transitions, 40667 flow. Second operand 22 states and 226 transitions. [2023-11-29 06:15:26,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 1912 transitions, 61598 flow [2023-11-29 06:16:08,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 1912 transitions, 60385 flow, removed 276 selfloop flow, removed 7 redundant places. [2023-11-29 06:16:08,582 INFO L231 Difference]: Finished difference. Result has 393 places, 1638 transitions, 57394 flow [2023-11-29 06:16:08,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=39783, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=924, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=57394, PETRI_PLACES=393, PETRI_TRANSITIONS=1638} [2023-11-29 06:16:08,584 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 368 predicate places. [2023-11-29 06:16:08,584 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 1638 transitions, 57394 flow [2023-11-29 06:16:08,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.625) internal successors, (106), 16 states have internal predecessors, (106), 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 06:16:08,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:16:08,584 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:16:08,589 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-29 06:16:08,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-29 06:16:08,784 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:16:08,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:16:08,785 INFO L85 PathProgramCache]: Analyzing trace with hash 180975329, now seen corresponding path program 19 times [2023-11-29 06:16:08,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:16:08,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727797189] [2023-11-29 06:16:08,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:16:08,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:16:08,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:16:08,863 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:16:08,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:16:08,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727797189] [2023-11-29 06:16:08,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727797189] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:16:08,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137289492] [2023-11-29 06:16:08,864 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 06:16:08,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:16:08,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:16:08,865 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:16:08,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 06:16:08,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:16:08,951 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 06:16:08,953 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:16:09,025 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:16:09,026 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:16:09,079 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:16:09,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137289492] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:16:09,079 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:16:09,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-11-29 06:16:09,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187981237] [2023-11-29 06:16:09,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:16:09,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 06:16:09,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:16:09,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 06:16:09,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2023-11-29 06:16:09,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2023-11-29 06:16:09,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 1638 transitions, 57394 flow. Second operand has 15 states, 15 states have (on average 6.0) internal successors, (90), 15 states have internal predecessors, (90), 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 06:16:09,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:16:09,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2023-11-29 06:16:09,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:16:32,894 INFO L124 PetriNetUnfolderBase]: 20590/33709 cut-off events. [2023-11-29 06:16:32,894 INFO L125 PetriNetUnfolderBase]: For 3294387/3294387 co-relation queries the response was YES. [2023-11-29 06:16:33,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 418409 conditions, 33709 events. 20590/33709 cut-off events. For 3294387/3294387 co-relation queries the response was YES. Maximal size of possible extension queue 1132. Compared 253480 event pairs, 862 based on Foata normal form. 166/33875 useless extension candidates. Maximal degree in co-relation 415829. Up to 5785 conditions per place. [2023-11-29 06:16:33,526 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 663 selfloop transitions, 1529 changer transitions 30/2223 dead transitions. [2023-11-29 06:16:33,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 2223 transitions, 76057 flow [2023-11-29 06:16:33,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-11-29 06:16:33,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-11-29 06:16:33,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 379 transitions. [2023-11-29 06:16:33,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43363844393592677 [2023-11-29 06:16:33,528 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 379 transitions. [2023-11-29 06:16:33,528 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 379 transitions. [2023-11-29 06:16:33,529 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:16:33,529 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 379 transitions. [2023-11-29 06:16:33,529 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 9.973684210526315) internal successors, (379), 38 states have internal predecessors, (379), 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 06:16:33,531 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 23.0) internal successors, (897), 39 states have internal predecessors, (897), 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 06:16:33,531 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 23.0) internal successors, (897), 39 states have internal predecessors, (897), 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 06:16:33,531 INFO L175 Difference]: Start difference. First operand has 393 places, 1638 transitions, 57394 flow. Second operand 38 states and 379 transitions. [2023-11-29 06:16:33,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 2223 transitions, 76057 flow [2023-11-29 06:17:36,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 2223 transitions, 75924 flow, removed 10 selfloop flow, removed 3 redundant places. [2023-11-29 06:17:36,967 INFO L231 Difference]: Finished difference. Result has 444 places, 1896 transitions, 71574 flow [2023-11-29 06:17:36,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=57262, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1638, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1283, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=71574, PETRI_PLACES=444, PETRI_TRANSITIONS=1896} [2023-11-29 06:17:36,969 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 419 predicate places. [2023-11-29 06:17:36,969 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 1896 transitions, 71574 flow [2023-11-29 06:17:36,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.0) internal successors, (90), 15 states have internal predecessors, (90), 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 06:17:36,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:17:36,970 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:17:36,974 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-29 06:17:37,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-29 06:17:37,170 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:17:37,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:17:37,171 INFO L85 PathProgramCache]: Analyzing trace with hash -831717203, now seen corresponding path program 20 times [2023-11-29 06:17:37,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:17:37,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031292530] [2023-11-29 06:17:37,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:17:37,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:17:37,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:17:37,256 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:17:37,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:17:37,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031292530] [2023-11-29 06:17:37,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031292530] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:17:37,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515554619] [2023-11-29 06:17:37,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:17:37,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:17:37,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:17:37,258 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:17:37,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-29 06:17:37,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:17:37,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:17:37,347 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 06:17:37,348 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:17:37,427 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:17:37,427 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:17:37,480 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:17:37,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515554619] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:17:37,481 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:17:37,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-11-29 06:17:37,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923619854] [2023-11-29 06:17:37,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:17:37,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 06:17:37,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:17:37,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 06:17:37,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2023-11-29 06:17:37,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2023-11-29 06:17:37,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 1896 transitions, 71574 flow. Second operand has 15 states, 15 states have (on average 6.0) internal successors, (90), 15 states have internal predecessors, (90), 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 06:17:37,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:17:37,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2023-11-29 06:17:37,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:18:06,752 INFO L124 PetriNetUnfolderBase]: 20478/33621 cut-off events. [2023-11-29 06:18:06,752 INFO L125 PetriNetUnfolderBase]: For 4096815/4096815 co-relation queries the response was YES. [2023-11-29 06:18:07,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 452782 conditions, 33621 events. 20478/33621 cut-off events. For 4096815/4096815 co-relation queries the response was YES. Maximal size of possible extension queue 1132. Compared 255134 event pairs, 2302 based on Foata normal form. 18/33639 useless extension candidates. Maximal degree in co-relation 449988. Up to 8670 conditions per place. [2023-11-29 06:18:07,602 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 975 selfloop transitions, 1131 changer transitions 5/2112 dead transitions. [2023-11-29 06:18:07,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 2112 transitions, 80100 flow [2023-11-29 06:18:07,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 06:18:07,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-29 06:18:07,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 209 transitions. [2023-11-29 06:18:07,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4782608695652174 [2023-11-29 06:18:07,604 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 209 transitions. [2023-11-29 06:18:07,604 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 209 transitions. [2023-11-29 06:18:07,604 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:18:07,604 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 209 transitions. [2023-11-29 06:18:07,604 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 11.0) internal successors, (209), 19 states have internal predecessors, (209), 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 06:18:07,605 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 23.0) internal successors, (460), 20 states have internal predecessors, (460), 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 06:18:07,605 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 23.0) internal successors, (460), 20 states have internal predecessors, (460), 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 06:18:07,605 INFO L175 Difference]: Start difference. First operand has 444 places, 1896 transitions, 71574 flow. Second operand 19 states and 209 transitions. [2023-11-29 06:18:07,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 2112 transitions, 80100 flow [2023-11-29 06:19:31,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 2112 transitions, 79066 flow, removed 429 selfloop flow, removed 8 redundant places. [2023-11-29 06:19:31,600 INFO L231 Difference]: Finished difference. Result has 456 places, 1899 transitions, 73008 flow [2023-11-29 06:19:31,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=70540, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1896, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=769, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=73008, PETRI_PLACES=456, PETRI_TRANSITIONS=1899} [2023-11-29 06:19:31,602 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 431 predicate places. [2023-11-29 06:19:31,602 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 1899 transitions, 73008 flow [2023-11-29 06:19:31,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.0) internal successors, (90), 15 states have internal predecessors, (90), 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 06:19:31,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:19:31,602 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:19:31,607 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-29 06:19:31,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-29 06:19:31,803 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:19:31,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:19:31,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1509884751, now seen corresponding path program 21 times [2023-11-29 06:19:31,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:19:31,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000336566] [2023-11-29 06:19:31,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:19:31,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:19:31,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:19:31,876 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:19:31,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:19:31,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000336566] [2023-11-29 06:19:31,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000336566] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:19:31,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926179570] [2023-11-29 06:19:31,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 06:19:31,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:19:31,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:19:31,878 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:19:31,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-29 06:19:31,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-29 06:19:31,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:19:31,958 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 06:19:31,959 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:19:32,049 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:19:32,049 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:19:32,117 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:19:32,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926179570] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:19:32,117 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:19:32,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-11-29 06:19:32,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981020256] [2023-11-29 06:19:32,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:19:32,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 06:19:32,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:19:32,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 06:19:32,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2023-11-29 06:19:32,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2023-11-29 06:19:32,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 1899 transitions, 73008 flow. Second operand has 15 states, 15 states have (on average 6.4) internal successors, (96), 15 states have internal predecessors, (96), 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 06:19:32,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:19:32,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2023-11-29 06:19:32,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:20:04,751 INFO L124 PetriNetUnfolderBase]: 23593/38758 cut-off events. [2023-11-29 06:20:04,751 INFO L125 PetriNetUnfolderBase]: For 4768987/4768987 co-relation queries the response was YES. [2023-11-29 06:20:05,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 529991 conditions, 38758 events. 23593/38758 cut-off events. For 4768987/4768987 co-relation queries the response was YES. Maximal size of possible extension queue 1254. Compared 298194 event pairs, 1023 based on Foata normal form. 140/38898 useless extension candidates. Maximal degree in co-relation 527190. Up to 9692 conditions per place. [2023-11-29 06:20:05,778 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 854 selfloop transitions, 1746 changer transitions 29/2630 dead transitions. [2023-11-29 06:20:05,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 2630 transitions, 100735 flow [2023-11-29 06:20:05,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-29 06:20:05,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-11-29 06:20:05,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 353 transitions. [2023-11-29 06:20:05,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42632850241545894 [2023-11-29 06:20:05,779 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 353 transitions. [2023-11-29 06:20:05,779 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 353 transitions. [2023-11-29 06:20:05,779 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:20:05,780 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 353 transitions. [2023-11-29 06:20:05,780 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 9.805555555555555) internal successors, (353), 36 states have internal predecessors, (353), 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 06:20:05,781 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 23.0) internal successors, (851), 37 states have internal predecessors, (851), 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 06:20:05,782 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 23.0) internal successors, (851), 37 states have internal predecessors, (851), 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 06:20:05,782 INFO L175 Difference]: Start difference. First operand has 456 places, 1899 transitions, 73008 flow. Second operand 36 states and 353 transitions. [2023-11-29 06:20:05,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 2630 transitions, 100735 flow [2023-11-29 06:22:11,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 471 places, 2630 transitions, 97593 flow, removed 17 selfloop flow, removed 19 redundant places. [2023-11-29 06:22:11,529 INFO L231 Difference]: Finished difference. Result has 484 places, 2275 transitions, 92084 flow [2023-11-29 06:22:11,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=70530, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1899, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1375, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=92084, PETRI_PLACES=484, PETRI_TRANSITIONS=2275} [2023-11-29 06:22:11,531 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 459 predicate places. [2023-11-29 06:22:11,531 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 2275 transitions, 92084 flow [2023-11-29 06:22:11,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.4) internal successors, (96), 15 states have internal predecessors, (96), 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 06:22:11,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:22:11,531 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:22:11,535 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-11-29 06:22:11,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-29 06:22:11,732 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:22:11,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:22:11,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1642105661, now seen corresponding path program 22 times [2023-11-29 06:22:11,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:22:11,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20854252] [2023-11-29 06:22:11,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:22:11,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:22:11,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:22:11,899 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:22:11,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:22:11,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20854252] [2023-11-29 06:22:11,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20854252] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:22:11,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028047526] [2023-11-29 06:22:11,900 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 06:22:11,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:22:11,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:22:11,901 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:22:11,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-29 06:22:11,970 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 06:22:11,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:22:11,971 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 06:22:11,972 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:22:12,049 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:22:12,049 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:22:12,107 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:22:12,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028047526] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:22:12,107 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:22:12,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 15 [2023-11-29 06:22:12,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336438198] [2023-11-29 06:22:12,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:22:12,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 06:22:12,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:22:12,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 06:22:12,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2023-11-29 06:22:12,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2023-11-29 06:22:12,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 2275 transitions, 92084 flow. Second operand has 15 states, 15 states have (on average 6.066666666666666) internal successors, (91), 15 states have internal predecessors, (91), 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 06:22:12,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:22:12,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2023-11-29 06:22:12,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:22:53,245 INFO L124 PetriNetUnfolderBase]: 24328/40121 cut-off events. [2023-11-29 06:22:53,245 INFO L125 PetriNetUnfolderBase]: For 5550982/5550982 co-relation queries the response was YES. [2023-11-29 06:22:53,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 574533 conditions, 40121 events. 24328/40121 cut-off events. For 5550982/5550982 co-relation queries the response was YES. Maximal size of possible extension queue 1305. Compared 311761 event pairs, 1208 based on Foata normal form. 292/40413 useless extension candidates. Maximal degree in co-relation 571515. Up to 6873 conditions per place. [2023-11-29 06:22:54,202 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 799 selfloop transitions, 1918 changer transitions 14/2732 dead transitions. [2023-11-29 06:22:54,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 520 places, 2732 transitions, 110024 flow [2023-11-29 06:22:54,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-11-29 06:22:54,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-11-29 06:22:54,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 362 transitions. [2023-11-29 06:22:54,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41418764302059496 [2023-11-29 06:22:54,204 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 362 transitions. [2023-11-29 06:22:54,204 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 362 transitions. [2023-11-29 06:22:54,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:22:54,204 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 362 transitions. [2023-11-29 06:22:54,205 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 9.526315789473685) internal successors, (362), 38 states have internal predecessors, (362), 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 06:22:54,207 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 23.0) internal successors, (897), 39 states have internal predecessors, (897), 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 06:22:54,207 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 23.0) internal successors, (897), 39 states have internal predecessors, (897), 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 06:22:54,207 INFO L175 Difference]: Start difference. First operand has 484 places, 2275 transitions, 92084 flow. Second operand 38 states and 362 transitions. [2023-11-29 06:22:54,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 520 places, 2732 transitions, 110024 flow [2023-11-29 06:25:17,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 507 places, 2732 transitions, 108637 flow, removed 465 selfloop flow, removed 13 redundant places. [2023-11-29 06:25:17,733 INFO L231 Difference]: Finished difference. Result has 519 places, 2411 transitions, 103394 flow [2023-11-29 06:25:17,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=90372, PETRI_DIFFERENCE_MINUEND_PLACES=470, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1760, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=103394, PETRI_PLACES=519, PETRI_TRANSITIONS=2411} [2023-11-29 06:25:17,735 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 494 predicate places. [2023-11-29 06:25:17,735 INFO L495 AbstractCegarLoop]: Abstraction has has 519 places, 2411 transitions, 103394 flow [2023-11-29 06:25:17,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.066666666666666) internal successors, (91), 15 states have internal predecessors, (91), 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 06:25:17,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:25:17,736 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:25:17,741 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-11-29 06:25:17,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-29 06:25:17,936 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:25:17,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:25:17,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1190573281, now seen corresponding path program 23 times [2023-11-29 06:25:17,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:25:17,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014867770] [2023-11-29 06:25:17,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:25:17,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:25:17,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:25:18,015 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:25:18,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:25:18,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014867770] [2023-11-29 06:25:18,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014867770] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:25:18,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631508086] [2023-11-29 06:25:18,016 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 06:25:18,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:25:18,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:25:18,017 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:25:18,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfca76-892c-49a6-9ad9-96430e65dba8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-29 06:25:18,090 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-29 06:25:18,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:25:18,092 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 06:25:18,092 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:25:18,187 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:25:18,188 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:25:18,262 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:25:18,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631508086] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:25:18,262 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:25:18,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-11-29 06:25:18,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812977243] [2023-11-29 06:25:18,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:25:18,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 06:25:18,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:25:18,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 06:25:18,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2023-11-29 06:25:18,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2023-11-29 06:25:18,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 519 places, 2411 transitions, 103394 flow. Second operand has 18 states, 18 states have (on average 6.111111111111111) internal successors, (110), 18 states have internal predecessors, (110), 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 06:25:18,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:25:18,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2023-11-29 06:25:18,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:26:09,174 INFO L124 PetriNetUnfolderBase]: 27214/45225 cut-off events. [2023-11-29 06:26:09,174 INFO L125 PetriNetUnfolderBase]: For 6435382/6435382 co-relation queries the response was YES. [2023-11-29 06:26:10,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 661168 conditions, 45225 events. 27214/45225 cut-off events. For 6435382/6435382 co-relation queries the response was YES. Maximal size of possible extension queue 1478. Compared 363074 event pairs, 1532 based on Foata normal form. 64/45289 useless extension candidates. Maximal degree in co-relation 657962. Up to 13636 conditions per place. [2023-11-29 06:26:10,461 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 1033 selfloop transitions, 2105 changer transitions 16/3155 dead transitions. [2023-11-29 06:26:10,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 550 places, 3155 transitions, 134146 flow [2023-11-29 06:26:10,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-29 06:26:10,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-11-29 06:26:10,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 341 transitions. [2023-11-29 06:26:10,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4236024844720497 [2023-11-29 06:26:10,463 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 341 transitions. [2023-11-29 06:26:10,463 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 341 transitions. [2023-11-29 06:26:10,463 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:26:10,463 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 341 transitions. [2023-11-29 06:26:10,464 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 9.742857142857142) internal successors, (341), 35 states have internal predecessors, (341), 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 06:26:10,465 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 23.0) internal successors, (828), 36 states have internal predecessors, (828), 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 06:26:10,465 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 23.0) internal successors, (828), 36 states have internal predecessors, (828), 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 06:26:10,465 INFO L175 Difference]: Start difference. First operand has 519 places, 2411 transitions, 103394 flow. Second operand 35 states and 341 transitions. [2023-11-29 06:26:10,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 550 places, 3155 transitions, 134146 flow