./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5aa8abe-0bc3-4033-9f24-5f997152a194/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5aa8abe-0bc3-4033-9f24-5f997152a194/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5aa8abe-0bc3-4033-9f24-5f997152a194/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5aa8abe-0bc3-4033-9f24-5f997152a194/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5aa8abe-0bc3-4033-9f24-5f997152a194/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5aa8abe-0bc3-4033-9f24-5f997152a194/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --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 6727abf6d3311127e7c3f388ca276994a5a41bcb1f2faca3217c66ebe13b8b8f --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:21:35,058 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:21:35,210 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5aa8abe-0bc3-4033-9f24-5f997152a194/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:21:35,220 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:21:35,221 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:21:35,273 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:21:35,274 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:21:35,275 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:21:35,277 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:21:35,284 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:21:35,285 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:21:35,285 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:21:35,286 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:21:35,288 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:21:35,289 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:21:35,289 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:21:35,290 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:21:35,290 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:21:35,291 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:21:35,291 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:21:35,292 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:21:35,293 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:21:35,293 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:21:35,294 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:21:35,294 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:21:35,295 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:21:35,296 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:21:35,296 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:21:35,297 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:21:35,297 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:21:35,299 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:21:35,300 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:21:35,300 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:21:35,300 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:21:35,300 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:21:35,301 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:21:35,301 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:21:35,301 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:21:35,302 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:21:35,302 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_b5aa8abe-0bc3-4033-9f24-5f997152a194/bin/uautomizer-verify-WvqO1wxjHP/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5aa8abe-0bc3-4033-9f24-5f997152a194/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6727abf6d3311127e7c3f388ca276994a5a41bcb1f2faca3217c66ebe13b8b8f [2023-11-06 22:21:35,659 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:21:35,697 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:21:35,700 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:21:35,702 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:21:35,703 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:21:35,705 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5aa8abe-0bc3-4033-9f24-5f997152a194/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c [2023-11-06 22:21:39,150 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:21:39,463 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:21:39,463 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5aa8abe-0bc3-4033-9f24-5f997152a194/sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c [2023-11-06 22:21:39,472 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5aa8abe-0bc3-4033-9f24-5f997152a194/bin/uautomizer-verify-WvqO1wxjHP/data/31cd6db11/5102a342b7b54de0883c4d0ba83d5a8e/FLAG12e6f6a17 [2023-11-06 22:21:39,488 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5aa8abe-0bc3-4033-9f24-5f997152a194/bin/uautomizer-verify-WvqO1wxjHP/data/31cd6db11/5102a342b7b54de0883c4d0ba83d5a8e [2023-11-06 22:21:39,492 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:21:39,494 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:21:39,495 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:21:39,496 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:21:39,503 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:21:39,503 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:21:39" (1/1) ... [2023-11-06 22:21:39,505 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58397c27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:21:39, skipping insertion in model container [2023-11-06 22:21:39,505 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:21:39" (1/1) ... [2023-11-06 22:21:39,537 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:21:39,802 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_b5aa8abe-0bc3-4033-9f24-5f997152a194/sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c[2412,2425] [2023-11-06 22:21:39,816 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:21:39,831 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:21:39,858 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_b5aa8abe-0bc3-4033-9f24-5f997152a194/sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c[2412,2425] [2023-11-06 22:21:39,865 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:21:39,884 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:21:39,885 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:21:39 WrapperNode [2023-11-06 22:21:39,885 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:21:39,886 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:21:39,886 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:21:39,887 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:21:39,897 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:21:39" (1/1) ... [2023-11-06 22:21:39,911 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:21:39" (1/1) ... [2023-11-06 22:21:39,954 INFO L138 Inliner]: procedures = 26, calls = 45, calls flagged for inlining = 15, calls inlined = 27, statements flattened = 280 [2023-11-06 22:21:39,954 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:21:39,955 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:21:39,956 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:21:39,956 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:21:39,969 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:21:39" (1/1) ... [2023-11-06 22:21:39,969 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:21:39" (1/1) ... [2023-11-06 22:21:39,976 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:21:39" (1/1) ... [2023-11-06 22:21:39,977 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:21:39" (1/1) ... [2023-11-06 22:21:39,990 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:21:39" (1/1) ... [2023-11-06 22:21:39,997 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:21:39" (1/1) ... [2023-11-06 22:21:40,000 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:21:39" (1/1) ... [2023-11-06 22:21:40,003 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:21:39" (1/1) ... [2023-11-06 22:21:40,009 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:21:40,010 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:21:40,011 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:21:40,011 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:21:40,012 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:21:39" (1/1) ... [2023-11-06 22:21:40,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:21:40,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5aa8abe-0bc3-4033-9f24-5f997152a194/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:21:40,051 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5aa8abe-0bc3-4033-9f24-5f997152a194/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:21:40,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5aa8abe-0bc3-4033-9f24-5f997152a194/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:21:40,102 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:21:40,103 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:21:40,103 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 22:21:40,103 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 22:21:40,103 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-06 22:21:40,103 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-06 22:21:40,104 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-06 22:21:40,104 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-06 22:21:40,104 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-06 22:21:40,104 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-06 22:21:40,104 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:21:40,105 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 22:21:40,105 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:21:40,105 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:21:40,105 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:21:40,107 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-06 22:21:40,257 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:21:40,259 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:21:41,039 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:21:41,055 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:21:41,055 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-06 22:21:41,058 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:21:41 BoogieIcfgContainer [2023-11-06 22:21:41,059 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:21:41,062 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:21:41,062 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:21:41,067 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:21:41,067 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:21:39" (1/3) ... [2023-11-06 22:21:41,068 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@527c7173 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:21:41, skipping insertion in model container [2023-11-06 22:21:41,069 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:21:39" (2/3) ... [2023-11-06 22:21:41,069 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@527c7173 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:21:41, skipping insertion in model container [2023-11-06 22:21:41,070 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:21:41" (3/3) ... [2023-11-06 22:21:41,071 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-three-array-sum-alt.wvr.c [2023-11-06 22:21:41,083 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-06 22:21:41,097 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:21:41,098 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:21:41,098 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 22:21:41,243 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-06 22:21:41,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 355 places, 374 transitions, 769 flow [2023-11-06 22:21:41,652 INFO L124 PetriNetUnfolderBase]: 29/371 cut-off events. [2023-11-06 22:21:41,652 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 22:21:41,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 384 conditions, 371 events. 29/371 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 518 event pairs, 0 based on Foata normal form. 0/341 useless extension candidates. Maximal degree in co-relation 244. Up to 2 conditions per place. [2023-11-06 22:21:41,668 INFO L82 GeneralOperation]: Start removeDead. Operand has 355 places, 374 transitions, 769 flow [2023-11-06 22:21:41,686 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 341 places, 360 transitions, 738 flow [2023-11-06 22:21:41,690 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:21:41,716 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 341 places, 360 transitions, 738 flow [2023-11-06 22:21:41,719 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 341 places, 360 transitions, 738 flow [2023-11-06 22:21:41,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 341 places, 360 transitions, 738 flow [2023-11-06 22:21:41,851 INFO L124 PetriNetUnfolderBase]: 29/360 cut-off events. [2023-11-06 22:21:41,851 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 22:21:41,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 373 conditions, 360 events. 29/360 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 510 event pairs, 0 based on Foata normal form. 0/331 useless extension candidates. Maximal degree in co-relation 244. Up to 2 conditions per place. [2023-11-06 22:21:41,875 INFO L119 LiptonReduction]: Number of co-enabled transitions 18176 [2023-11-06 22:21:56,899 INFO L134 LiptonReduction]: Checked pairs total: 17024 [2023-11-06 22:21:56,899 INFO L136 LiptonReduction]: Total number of compositions: 428 [2023-11-06 22:21:56,918 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:21:56,927 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=LoopsAndPotentialCycles, 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;@24aa0c82, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:21:56,927 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-06 22:21:56,935 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:21:56,936 INFO L124 PetriNetUnfolderBase]: 6/27 cut-off events. [2023-11-06 22:21:56,936 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 22:21:56,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:21:56,937 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:21:56,938 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 22:21:56,944 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:21:56,944 INFO L85 PathProgramCache]: Analyzing trace with hash -273700071, now seen corresponding path program 1 times [2023-11-06 22:21:56,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:21:56,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961408332] [2023-11-06 22:21:56,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:21:56,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:21:57,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:21:57,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:21:57,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:21:57,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961408332] [2023-11-06 22:21:57,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961408332] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:21:57,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:21:57,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:21:57,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366633011] [2023-11-06 22:21:57,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:21:57,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:21:57,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:21:57,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:21:57,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:21:57,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 341 out of 802 [2023-11-06 22:21:57,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 28 transitions, 74 flow. Second operand has 3 states, 3 states have (on average 347.3333333333333) internal successors, (1042), 3 states have internal predecessors, (1042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:57,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:21:57,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 341 of 802 [2023-11-06 22:21:57,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:21:58,145 INFO L124 PetriNetUnfolderBase]: 362/512 cut-off events. [2023-11-06 22:21:58,146 INFO L125 PetriNetUnfolderBase]: For 42/42 co-relation queries the response was YES. [2023-11-06 22:21:58,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1076 conditions, 512 events. 362/512 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1616 event pairs, 39 based on Foata normal form. 1/312 useless extension candidates. Maximal degree in co-relation 803. Up to 421 conditions per place. [2023-11-06 22:21:58,152 INFO L140 encePairwiseOnDemand]: 797/802 looper letters, 36 selfloop transitions, 4 changer transitions 1/44 dead transitions. [2023-11-06 22:21:58,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 44 transitions, 203 flow [2023-11-06 22:21:58,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:21:58,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:21:58,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1065 transitions. [2023-11-06 22:21:58,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.442643391521197 [2023-11-06 22:21:58,192 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1065 transitions. [2023-11-06 22:21:58,193 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1065 transitions. [2023-11-06 22:21:58,198 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:21:58,202 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1065 transitions. [2023-11-06 22:21:58,211 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 355.0) internal successors, (1065), 3 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:58,226 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 802.0) internal successors, (3208), 4 states have internal predecessors, (3208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:58,229 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 802.0) internal successors, (3208), 4 states have internal predecessors, (3208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:58,232 INFO L175 Difference]: Start difference. First operand has 32 places, 28 transitions, 74 flow. Second operand 3 states and 1065 transitions. [2023-11-06 22:21:58,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 44 transitions, 203 flow [2023-11-06 22:21:58,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 44 transitions, 181 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-06 22:21:58,244 INFO L231 Difference]: Finished difference. Result has 29 places, 31 transitions, 88 flow [2023-11-06 22:21:58,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=802, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=29, PETRI_TRANSITIONS=31} [2023-11-06 22:21:58,255 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -3 predicate places. [2023-11-06 22:21:58,256 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 31 transitions, 88 flow [2023-11-06 22:21:58,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 347.3333333333333) internal successors, (1042), 3 states have internal predecessors, (1042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:58,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:21:58,258 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:21:58,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:21:58,259 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 22:21:58,273 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:21:58,274 INFO L85 PathProgramCache]: Analyzing trace with hash -898867589, now seen corresponding path program 1 times [2023-11-06 22:21:58,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:21:58,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340193845] [2023-11-06 22:21:58,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:21:58,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:21:58,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:21:58,524 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:21:58,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:21:58,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340193845] [2023-11-06 22:21:58,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340193845] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:21:58,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:21:58,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:21:58,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221810408] [2023-11-06 22:21:58,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:21:58,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:21:58,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:21:58,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:21:58,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:21:58,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 320 out of 802 [2023-11-06 22:21:58,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 31 transitions, 88 flow. Second operand has 5 states, 5 states have (on average 324.2) internal successors, (1621), 5 states have internal predecessors, (1621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:58,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:21:58,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 320 of 802 [2023-11-06 22:21:58,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:21:59,086 INFO L124 PetriNetUnfolderBase]: 618/935 cut-off events. [2023-11-06 22:21:59,086 INFO L125 PetriNetUnfolderBase]: For 259/259 co-relation queries the response was YES. [2023-11-06 22:21:59,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2273 conditions, 935 events. 618/935 cut-off events. For 259/259 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 3861 event pairs, 284 based on Foata normal form. 34/955 useless extension candidates. Maximal degree in co-relation 511. Up to 480 conditions per place. [2023-11-06 22:21:59,096 INFO L140 encePairwiseOnDemand]: 792/802 looper letters, 56 selfloop transitions, 12 changer transitions 0/70 dead transitions. [2023-11-06 22:21:59,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 70 transitions, 332 flow [2023-11-06 22:21:59,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:21:59,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:21:59,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1984 transitions. [2023-11-06 22:21:59,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41230257689110555 [2023-11-06 22:21:59,107 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1984 transitions. [2023-11-06 22:21:59,107 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1984 transitions. [2023-11-06 22:21:59,109 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:21:59,109 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1984 transitions. [2023-11-06 22:21:59,118 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 330.6666666666667) internal successors, (1984), 6 states have internal predecessors, (1984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:59,132 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 802.0) internal successors, (5614), 7 states have internal predecessors, (5614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:59,141 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 802.0) internal successors, (5614), 7 states have internal predecessors, (5614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:59,142 INFO L175 Difference]: Start difference. First operand has 29 places, 31 transitions, 88 flow. Second operand 6 states and 1984 transitions. [2023-11-06 22:21:59,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 70 transitions, 332 flow [2023-11-06 22:21:59,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 70 transitions, 324 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:21:59,147 INFO L231 Difference]: Finished difference. Result has 37 places, 41 transitions, 168 flow [2023-11-06 22:21:59,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=802, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=168, PETRI_PLACES=37, PETRI_TRANSITIONS=41} [2023-11-06 22:21:59,150 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 5 predicate places. [2023-11-06 22:21:59,150 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 41 transitions, 168 flow [2023-11-06 22:21:59,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 324.2) internal successors, (1621), 5 states have internal predecessors, (1621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:59,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:21:59,159 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:21:59,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 22:21:59,160 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 22:21:59,164 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:21:59,164 INFO L85 PathProgramCache]: Analyzing trace with hash -38077672, now seen corresponding path program 1 times [2023-11-06 22:21:59,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:21:59,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118687307] [2023-11-06 22:21:59,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:21:59,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:21:59,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:21:59,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:21:59,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:21:59,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118687307] [2023-11-06 22:21:59,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118687307] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:21:59,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:21:59,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:21:59,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974106194] [2023-11-06 22:21:59,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:21:59,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:21:59,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:21:59,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:21:59,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:21:59,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 320 out of 802 [2023-11-06 22:21:59,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 41 transitions, 168 flow. Second operand has 5 states, 5 states have (on average 324.2) internal successors, (1621), 5 states have internal predecessors, (1621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:59,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:21:59,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 320 of 802 [2023-11-06 22:21:59,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:21:59,908 INFO L124 PetriNetUnfolderBase]: 501/775 cut-off events. [2023-11-06 22:21:59,908 INFO L125 PetriNetUnfolderBase]: For 513/575 co-relation queries the response was YES. [2023-11-06 22:21:59,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2008 conditions, 775 events. 501/775 cut-off events. For 513/575 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 3178 event pairs, 262 based on Foata normal form. 90/865 useless extension candidates. Maximal degree in co-relation 1368. Up to 510 conditions per place. [2023-11-06 22:21:59,917 INFO L140 encePairwiseOnDemand]: 792/802 looper letters, 52 selfloop transitions, 12 changer transitions 0/67 dead transitions. [2023-11-06 22:21:59,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 67 transitions, 370 flow [2023-11-06 22:21:59,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:21:59,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:21:59,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1980 transitions. [2023-11-06 22:21:59,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4114713216957606 [2023-11-06 22:21:59,928 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1980 transitions. [2023-11-06 22:21:59,929 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1980 transitions. [2023-11-06 22:21:59,931 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:21:59,931 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1980 transitions. [2023-11-06 22:21:59,939 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 330.0) internal successors, (1980), 6 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:59,953 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 802.0) internal successors, (5614), 7 states have internal predecessors, (5614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:59,958 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 802.0) internal successors, (5614), 7 states have internal predecessors, (5614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:59,958 INFO L175 Difference]: Start difference. First operand has 37 places, 41 transitions, 168 flow. Second operand 6 states and 1980 transitions. [2023-11-06 22:21:59,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 67 transitions, 370 flow [2023-11-06 22:21:59,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 67 transitions, 370 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 22:21:59,964 INFO L231 Difference]: Finished difference. Result has 44 places, 43 transitions, 210 flow [2023-11-06 22:21:59,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=802, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=210, PETRI_PLACES=44, PETRI_TRANSITIONS=43} [2023-11-06 22:21:59,965 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 12 predicate places. [2023-11-06 22:21:59,965 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 43 transitions, 210 flow [2023-11-06 22:21:59,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 324.2) internal successors, (1621), 5 states have internal predecessors, (1621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:59,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:21:59,968 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:21:59,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 22:21:59,968 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 22:21:59,969 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:21:59,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1893638709, now seen corresponding path program 1 times [2023-11-06 22:21:59,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:21:59,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507270579] [2023-11-06 22:21:59,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:21:59,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:21:59,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:22:00,133 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:22:00,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:22:00,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507270579] [2023-11-06 22:22:00,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507270579] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:22:00,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:22:00,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:22:00,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607291767] [2023-11-06 22:22:00,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:22:00,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:22:00,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:22:00,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:22:00,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:22:00,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 320 out of 802 [2023-11-06 22:22:00,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 43 transitions, 210 flow. Second operand has 5 states, 5 states have (on average 324.2) internal successors, (1621), 5 states have internal predecessors, (1621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:00,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:22:00,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 320 of 802 [2023-11-06 22:22:00,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:22:00,647 INFO L124 PetriNetUnfolderBase]: 421/645 cut-off events. [2023-11-06 22:22:00,647 INFO L125 PetriNetUnfolderBase]: For 715/785 co-relation queries the response was YES. [2023-11-06 22:22:00,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1901 conditions, 645 events. 421/645 cut-off events. For 715/785 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2431 event pairs, 221 based on Foata normal form. 84/719 useless extension candidates. Maximal degree in co-relation 1544. Up to 518 conditions per place. [2023-11-06 22:22:00,654 INFO L140 encePairwiseOnDemand]: 792/802 looper letters, 26 selfloop transitions, 6 changer transitions 29/63 dead transitions. [2023-11-06 22:22:00,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 63 transitions, 384 flow [2023-11-06 22:22:00,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:22:00,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:22:00,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1977 transitions. [2023-11-06 22:22:00,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41084788029925184 [2023-11-06 22:22:00,663 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1977 transitions. [2023-11-06 22:22:00,664 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1977 transitions. [2023-11-06 22:22:00,665 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:22:00,666 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1977 transitions. [2023-11-06 22:22:00,672 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 329.5) internal successors, (1977), 6 states have internal predecessors, (1977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:00,684 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 802.0) internal successors, (5614), 7 states have internal predecessors, (5614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:00,689 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 802.0) internal successors, (5614), 7 states have internal predecessors, (5614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:00,689 INFO L175 Difference]: Start difference. First operand has 44 places, 43 transitions, 210 flow. Second operand 6 states and 1977 transitions. [2023-11-06 22:22:00,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 63 transitions, 384 flow [2023-11-06 22:22:00,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 63 transitions, 366 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-06 22:22:00,694 INFO L231 Difference]: Finished difference. Result has 48 places, 34 transitions, 154 flow [2023-11-06 22:22:00,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=802, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=154, PETRI_PLACES=48, PETRI_TRANSITIONS=34} [2023-11-06 22:22:00,695 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 16 predicate places. [2023-11-06 22:22:00,696 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 34 transitions, 154 flow [2023-11-06 22:22:00,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 324.2) internal successors, (1621), 5 states have internal predecessors, (1621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:00,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:22:00,697 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:22:00,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 22:22:00,698 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 22:22:00,698 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:22:00,698 INFO L85 PathProgramCache]: Analyzing trace with hash -408928524, now seen corresponding path program 1 times [2023-11-06 22:22:00,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:22:00,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749858955] [2023-11-06 22:22:00,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:22:00,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:22:00,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:22:00,865 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:22:00,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:22:00,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749858955] [2023-11-06 22:22:00,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749858955] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:22:00,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039685110] [2023-11-06 22:22:00,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:22:00,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:22:00,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5aa8abe-0bc3-4033-9f24-5f997152a194/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:22:00,872 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5aa8abe-0bc3-4033-9f24-5f997152a194/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:22:00,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5aa8abe-0bc3-4033-9f24-5f997152a194/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:22:01,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:22:01,036 INFO L262 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:22:01,042 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:22:01,112 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:22:01,112 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:22:01,164 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:22:01,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039685110] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:22:01,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:22:01,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2023-11-06 22:22:01,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120429236] [2023-11-06 22:22:01,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:22:01,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:22:01,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:22:01,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:22:01,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-06 22:22:01,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 313 out of 802 [2023-11-06 22:22:01,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 34 transitions, 154 flow. Second operand has 5 states, 5 states have (on average 317.8) internal successors, (1589), 5 states have internal predecessors, (1589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:01,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:22:01,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 313 of 802 [2023-11-06 22:22:01,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:22:01,635 INFO L124 PetriNetUnfolderBase]: 378/548 cut-off events. [2023-11-06 22:22:01,636 INFO L125 PetriNetUnfolderBase]: For 569/569 co-relation queries the response was YES. [2023-11-06 22:22:01,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1717 conditions, 548 events. 378/548 cut-off events. For 569/569 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 1853 event pairs, 96 based on Foata normal form. 42/576 useless extension candidates. Maximal degree in co-relation 1696. Up to 393 conditions per place. [2023-11-06 22:22:01,643 INFO L140 encePairwiseOnDemand]: 797/802 looper letters, 39 selfloop transitions, 5 changer transitions 0/46 dead transitions. [2023-11-06 22:22:01,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 46 transitions, 290 flow [2023-11-06 22:22:01,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:22:01,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:22:01,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1603 transitions. [2023-11-06 22:22:01,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3997506234413965 [2023-11-06 22:22:01,651 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1603 transitions. [2023-11-06 22:22:01,651 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1603 transitions. [2023-11-06 22:22:01,652 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:22:01,652 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1603 transitions. [2023-11-06 22:22:01,658 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 320.6) internal successors, (1603), 5 states have internal predecessors, (1603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:01,666 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 802.0) internal successors, (4812), 6 states have internal predecessors, (4812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:01,669 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 802.0) internal successors, (4812), 6 states have internal predecessors, (4812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:01,669 INFO L175 Difference]: Start difference. First operand has 48 places, 34 transitions, 154 flow. Second operand 5 states and 1603 transitions. [2023-11-06 22:22:01,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 46 transitions, 290 flow [2023-11-06 22:22:01,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 46 transitions, 238 flow, removed 20 selfloop flow, removed 9 redundant places. [2023-11-06 22:22:01,675 INFO L231 Difference]: Finished difference. Result has 36 places, 35 transitions, 135 flow [2023-11-06 22:22:01,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=802, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=135, PETRI_PLACES=36, PETRI_TRANSITIONS=35} [2023-11-06 22:22:01,676 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 4 predicate places. [2023-11-06 22:22:01,676 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 35 transitions, 135 flow [2023-11-06 22:22:01,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 317.8) internal successors, (1589), 5 states have internal predecessors, (1589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:01,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:22:01,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:22:01,694 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5aa8abe-0bc3-4033-9f24-5f997152a194/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:22:01,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5aa8abe-0bc3-4033-9f24-5f997152a194/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:22:01,895 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 22:22:01,895 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:22:01,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1995674747, now seen corresponding path program 1 times [2023-11-06 22:22:01,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:22:01,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359208042] [2023-11-06 22:22:01,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:22:01,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:22:01,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:22:02,077 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:22:02,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:22:02,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359208042] [2023-11-06 22:22:02,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359208042] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:22:02,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020021260] [2023-11-06 22:22:02,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:22:02,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:22:02,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5aa8abe-0bc3-4033-9f24-5f997152a194/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:22:02,080 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5aa8abe-0bc3-4033-9f24-5f997152a194/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:22:02,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5aa8abe-0bc3-4033-9f24-5f997152a194/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:22:02,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:22:02,229 INFO L262 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:22:02,232 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:22:02,274 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:22:02,275 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:22:02,315 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:22:02,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020021260] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:22:02,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:22:02,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-11-06 22:22:02,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919319740] [2023-11-06 22:22:02,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:22:02,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:22:02,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:22:02,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:22:02,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-06 22:22:02,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 313 out of 802 [2023-11-06 22:22:02,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 35 transitions, 135 flow. Second operand has 5 states, 5 states have (on average 317.8) internal successors, (1589), 5 states have internal predecessors, (1589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:02,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:22:02,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 313 of 802 [2023-11-06 22:22:02,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:22:02,706 INFO L124 PetriNetUnfolderBase]: 297/441 cut-off events. [2023-11-06 22:22:02,706 INFO L125 PetriNetUnfolderBase]: For 283/345 co-relation queries the response was YES. [2023-11-06 22:22:02,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1252 conditions, 441 events. 297/441 cut-off events. For 283/345 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1355 event pairs, 93 based on Foata normal form. 90/524 useless extension candidates. Maximal degree in co-relation 1212. Up to 337 conditions per place. [2023-11-06 22:22:02,712 INFO L140 encePairwiseOnDemand]: 797/802 looper letters, 41 selfloop transitions, 5 changer transitions 0/48 dead transitions. [2023-11-06 22:22:02,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 48 transitions, 277 flow [2023-11-06 22:22:02,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:22:02,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:22:02,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1603 transitions. [2023-11-06 22:22:02,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3997506234413965 [2023-11-06 22:22:02,721 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1603 transitions. [2023-11-06 22:22:02,722 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1603 transitions. [2023-11-06 22:22:02,723 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:22:02,723 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1603 transitions. [2023-11-06 22:22:02,729 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 320.6) internal successors, (1603), 5 states have internal predecessors, (1603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:02,739 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 802.0) internal successors, (4812), 6 states have internal predecessors, (4812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:02,743 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 802.0) internal successors, (4812), 6 states have internal predecessors, (4812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:02,743 INFO L175 Difference]: Start difference. First operand has 36 places, 35 transitions, 135 flow. Second operand 5 states and 1603 transitions. [2023-11-06 22:22:02,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 48 transitions, 277 flow [2023-11-06 22:22:02,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 48 transitions, 260 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-11-06 22:22:02,747 INFO L231 Difference]: Finished difference. Result has 39 places, 36 transitions, 145 flow [2023-11-06 22:22:02,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=802, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=145, PETRI_PLACES=39, PETRI_TRANSITIONS=36} [2023-11-06 22:22:02,751 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 7 predicate places. [2023-11-06 22:22:02,751 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 36 transitions, 145 flow [2023-11-06 22:22:02,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 317.8) internal successors, (1589), 5 states have internal predecessors, (1589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:02,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:22:02,753 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:22:02,765 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5aa8abe-0bc3-4033-9f24-5f997152a194/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:22:02,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5aa8abe-0bc3-4033-9f24-5f997152a194/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:22:02,960 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 22:22:02,960 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:22:02,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1149158467, now seen corresponding path program 1 times [2023-11-06 22:22:02,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:22:02,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076973581] [2023-11-06 22:22:02,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:22:02,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:22:02,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:22:03,156 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:22:03,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:22:03,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076973581] [2023-11-06 22:22:03,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076973581] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:22:03,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590832371] [2023-11-06 22:22:03,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:22:03,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:22:03,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5aa8abe-0bc3-4033-9f24-5f997152a194/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:22:03,159 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5aa8abe-0bc3-4033-9f24-5f997152a194/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:22:03,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5aa8abe-0bc3-4033-9f24-5f997152a194/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:22:03,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:22:03,331 INFO L262 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:22:03,334 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:22:03,389 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:22:03,389 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:22:03,448 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:22:03,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590832371] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:22:03,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:22:03,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2023-11-06 22:22:03,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700083055] [2023-11-06 22:22:03,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:22:03,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:22:03,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:22:03,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:22:03,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-06 22:22:03,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 313 out of 802 [2023-11-06 22:22:03,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 36 transitions, 145 flow. Second operand has 5 states, 5 states have (on average 318.0) internal successors, (1590), 5 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:03,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:22:03,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 313 of 802 [2023-11-06 22:22:03,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:22:03,808 INFO L124 PetriNetUnfolderBase]: 282/422 cut-off events. [2023-11-06 22:22:03,809 INFO L125 PetriNetUnfolderBase]: For 467/587 co-relation queries the response was YES. [2023-11-06 22:22:03,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1277 conditions, 422 events. 282/422 cut-off events. For 467/587 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1300 event pairs, 114 based on Foata normal form. 146/567 useless extension candidates. Maximal degree in co-relation 1236. Up to 333 conditions per place. [2023-11-06 22:22:03,814 INFO L140 encePairwiseOnDemand]: 797/802 looper letters, 43 selfloop transitions, 5 changer transitions 0/50 dead transitions. [2023-11-06 22:22:03,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 50 transitions, 299 flow [2023-11-06 22:22:03,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:22:03,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:22:03,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1603 transitions. [2023-11-06 22:22:03,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3997506234413965 [2023-11-06 22:22:03,823 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1603 transitions. [2023-11-06 22:22:03,823 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1603 transitions. [2023-11-06 22:22:03,825 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:22:03,825 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1603 transitions. [2023-11-06 22:22:03,830 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 320.6) internal successors, (1603), 5 states have internal predecessors, (1603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:03,840 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 802.0) internal successors, (4812), 6 states have internal predecessors, (4812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:03,842 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 802.0) internal successors, (4812), 6 states have internal predecessors, (4812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:03,842 INFO L175 Difference]: Start difference. First operand has 39 places, 36 transitions, 145 flow. Second operand 5 states and 1603 transitions. [2023-11-06 22:22:03,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 50 transitions, 299 flow [2023-11-06 22:22:03,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 50 transitions, 282 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-11-06 22:22:03,846 INFO L231 Difference]: Finished difference. Result has 41 places, 37 transitions, 155 flow [2023-11-06 22:22:03,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=802, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=155, PETRI_PLACES=41, PETRI_TRANSITIONS=37} [2023-11-06 22:22:03,847 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 9 predicate places. [2023-11-06 22:22:03,847 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 37 transitions, 155 flow [2023-11-06 22:22:03,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 318.0) internal successors, (1590), 5 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:03,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:22:03,849 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:22:03,856 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5aa8abe-0bc3-4033-9f24-5f997152a194/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:22:04,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5aa8abe-0bc3-4033-9f24-5f997152a194/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:22:04,056 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 22:22:04,056 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:22:04,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1617554823, now seen corresponding path program 1 times [2023-11-06 22:22:04,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:22:04,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522445442] [2023-11-06 22:22:04,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:22:04,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:22:04,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:22:06,036 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:22:06,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:22:06,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522445442] [2023-11-06 22:22:06,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522445442] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:22:06,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982849678] [2023-11-06 22:22:06,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:22:06,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:22:06,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5aa8abe-0bc3-4033-9f24-5f997152a194/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:22:06,039 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5aa8abe-0bc3-4033-9f24-5f997152a194/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:22:06,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5aa8abe-0bc3-4033-9f24-5f997152a194/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:22:06,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:22:06,220 INFO L262 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 45 conjunts are in the unsatisfiable core [2023-11-06 22:22:06,225 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:22:06,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:22:06,877 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-06 22:22:07,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:22:07,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:22:07,199 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-06 22:22:07,200 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 21 [2023-11-06 22:22:07,371 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:22:07,371 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2023-11-06 22:22:07,394 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:22:07,395 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:22:07,586 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_272 (Array Int Int))) (= (+ c_~asum~0 c_~bsum~0 (select (select |c_#memory_int| c_~B~0.base) (+ (* |c_thread2Thread1of1ForFork1_~i~1#1| 4) c_~B~0.offset))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_272))) (+ (select (select .cse0 c_~A~0.base) c_~A~0.offset) c_~csum~0 (select (select .cse0 c_~B~0.base) c_~B~0.offset))))) is different from false [2023-11-06 22:22:07,672 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_272 (Array Int Int)) (v_ArrVal_271 (Array Int Int))) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_271))) (= (let ((.cse0 (store .cse1 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_272))) (+ (select (select .cse0 c_~B~0.base) c_~B~0.offset) (select (select .cse0 c_~A~0.base) c_~A~0.offset) c_~csum~0)) (+ c_~asum~0 c_~bsum~0 (select (select .cse1 c_~B~0.base) c_~B~0.offset))))) is different from false [2023-11-06 22:22:07,743 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:22:07,743 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 2166 treesize of output 1496 [2023-11-06 22:22:07,783 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:22:07,783 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 342 treesize of output 318 [2023-11-06 22:22:07,811 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:22:07,811 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 310 treesize of output 302 [2023-11-06 22:22:08,983 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 1 not checked. [2023-11-06 22:22:08,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982849678] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:22:08,983 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:22:08,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 30 [2023-11-06 22:22:08,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126212103] [2023-11-06 22:22:08,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:22:08,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-06 22:22:08,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:22:08,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-06 22:22:08,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=756, Unknown=6, NotChecked=114, Total=992 [2023-11-06 22:22:08,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 269 out of 802 [2023-11-06 22:22:09,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 37 transitions, 155 flow. Second operand has 32 states, 32 states have (on average 271.125) internal successors, (8676), 32 states have internal predecessors, (8676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:09,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:22:09,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 269 of 802 [2023-11-06 22:22:09,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:22:10,502 INFO L124 PetriNetUnfolderBase]: 746/1094 cut-off events. [2023-11-06 22:22:10,502 INFO L125 PetriNetUnfolderBase]: For 886/886 co-relation queries the response was YES. [2023-11-06 22:22:10,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3484 conditions, 1094 events. 746/1094 cut-off events. For 886/886 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3905 event pairs, 31 based on Foata normal form. 1/1095 useless extension candidates. Maximal degree in co-relation 3442. Up to 747 conditions per place. [2023-11-06 22:22:10,515 INFO L140 encePairwiseOnDemand]: 793/802 looper letters, 86 selfloop transitions, 25 changer transitions 1/112 dead transitions. [2023-11-06 22:22:10,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 112 transitions, 654 flow [2023-11-06 22:22:10,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 22:22:10,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-06 22:22:10,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2797 transitions. [2023-11-06 22:22:10,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34875311720698254 [2023-11-06 22:22:10,529 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2797 transitions. [2023-11-06 22:22:10,529 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2797 transitions. [2023-11-06 22:22:10,531 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:22:10,532 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2797 transitions. [2023-11-06 22:22:10,541 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 279.7) internal successors, (2797), 10 states have internal predecessors, (2797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:10,556 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 802.0) internal successors, (8822), 11 states have internal predecessors, (8822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:10,560 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 802.0) internal successors, (8822), 11 states have internal predecessors, (8822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:10,560 INFO L175 Difference]: Start difference. First operand has 41 places, 37 transitions, 155 flow. Second operand 10 states and 2797 transitions. [2023-11-06 22:22:10,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 112 transitions, 654 flow [2023-11-06 22:22:10,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 112 transitions, 623 flow, removed 7 selfloop flow, removed 3 redundant places. [2023-11-06 22:22:10,566 INFO L231 Difference]: Finished difference. Result has 51 places, 57 transitions, 328 flow [2023-11-06 22:22:10,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=802, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=328, PETRI_PLACES=51, PETRI_TRANSITIONS=57} [2023-11-06 22:22:10,570 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 19 predicate places. [2023-11-06 22:22:10,571 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 57 transitions, 328 flow [2023-11-06 22:22:10,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 271.125) internal successors, (8676), 32 states have internal predecessors, (8676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:10,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:22:10,575 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:22:10,588 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5aa8abe-0bc3-4033-9f24-5f997152a194/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:22:10,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5aa8abe-0bc3-4033-9f24-5f997152a194/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-06 22:22:10,783 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 22:22:10,783 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:22:10,784 INFO L85 PathProgramCache]: Analyzing trace with hash -414297555, now seen corresponding path program 2 times [2023-11-06 22:22:10,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:22:10,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256754623] [2023-11-06 22:22:10,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:22:10,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:22:10,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:22:12,042 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:22:12,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:22:12,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256754623] [2023-11-06 22:22:12,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256754623] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:22:12,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123523684] [2023-11-06 22:22:12,044 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:22:12,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:22:12,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5aa8abe-0bc3-4033-9f24-5f997152a194/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:22:12,046 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5aa8abe-0bc3-4033-9f24-5f997152a194/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:22:12,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5aa8abe-0bc3-4033-9f24-5f997152a194/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:22:12,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:22:12,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:22:12,234 INFO L262 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-06 22:22:12,239 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:22:12,626 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:22:12,627 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2023-11-06 22:22:12,639 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:22:12,640 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:22:12,776 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:22:12,777 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 95 [2023-11-06 22:22:13,031 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:22:13,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123523684] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:22:13,031 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:22:13,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 6] total 15 [2023-11-06 22:22:13,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170103658] [2023-11-06 22:22:13,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:22:13,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-06 22:22:13,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:22:13,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-06 22:22:13,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2023-11-06 22:22:14,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 309 out of 802 [2023-11-06 22:22:14,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 57 transitions, 328 flow. Second operand has 17 states, 17 states have (on average 312.1764705882353) internal successors, (5307), 17 states have internal predecessors, (5307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:14,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:22:14,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 309 of 802 [2023-11-06 22:22:14,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:22:14,893 INFO L124 PetriNetUnfolderBase]: 865/1268 cut-off events. [2023-11-06 22:22:14,894 INFO L125 PetriNetUnfolderBase]: For 1726/1726 co-relation queries the response was YES. [2023-11-06 22:22:14,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4711 conditions, 1268 events. 865/1268 cut-off events. For 1726/1726 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 4546 event pairs, 173 based on Foata normal form. 1/1269 useless extension candidates. Maximal degree in co-relation 4666. Up to 1096 conditions per place. [2023-11-06 22:22:14,911 INFO L140 encePairwiseOnDemand]: 793/802 looper letters, 81 selfloop transitions, 30 changer transitions 1/112 dead transitions. [2023-11-06 22:22:14,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 112 transitions, 806 flow [2023-11-06 22:22:14,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 22:22:14,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-06 22:22:14,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 3175 transitions. [2023-11-06 22:22:14,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958852867830424 [2023-11-06 22:22:14,925 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 3175 transitions. [2023-11-06 22:22:14,925 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 3175 transitions. [2023-11-06 22:22:14,928 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:22:14,929 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 3175 transitions. [2023-11-06 22:22:14,938 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 317.5) internal successors, (3175), 10 states have internal predecessors, (3175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:14,953 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 802.0) internal successors, (8822), 11 states have internal predecessors, (8822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:14,955 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 802.0) internal successors, (8822), 11 states have internal predecessors, (8822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:14,956 INFO L175 Difference]: Start difference. First operand has 51 places, 57 transitions, 328 flow. Second operand 10 states and 3175 transitions. [2023-11-06 22:22:14,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 112 transitions, 806 flow [2023-11-06 22:22:14,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 112 transitions, 751 flow, removed 18 selfloop flow, removed 2 redundant places. [2023-11-06 22:22:14,967 INFO L231 Difference]: Finished difference. Result has 64 places, 80 transitions, 546 flow [2023-11-06 22:22:14,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=802, PETRI_DIFFERENCE_MINUEND_FLOW=290, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=546, PETRI_PLACES=64, PETRI_TRANSITIONS=80} [2023-11-06 22:22:14,969 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 32 predicate places. [2023-11-06 22:22:14,969 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 80 transitions, 546 flow [2023-11-06 22:22:14,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 312.1764705882353) internal successors, (5307), 17 states have internal predecessors, (5307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:14,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:22:14,972 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:22:14,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5aa8abe-0bc3-4033-9f24-5f997152a194/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:22:15,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5aa8abe-0bc3-4033-9f24-5f997152a194/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:22:15,179 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 22:22:15,180 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:22:15,180 INFO L85 PathProgramCache]: Analyzing trace with hash 318231471, now seen corresponding path program 3 times [2023-11-06 22:22:15,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:22:15,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672622605] [2023-11-06 22:22:15,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:22:15,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:22:15,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:22:16,336 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:22:16,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:22:16,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672622605] [2023-11-06 22:22:16,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672622605] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:22:16,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454758922] [2023-11-06 22:22:16,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:22:16,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:22:16,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5aa8abe-0bc3-4033-9f24-5f997152a194/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:22:16,348 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5aa8abe-0bc3-4033-9f24-5f997152a194/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:22:16,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5aa8abe-0bc3-4033-9f24-5f997152a194/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:22:16,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 22:22:16,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:22:16,541 INFO L262 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-06 22:22:16,545 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:22:16,925 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:22:16,926 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2023-11-06 22:22:16,939 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:22:16,939 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:22:17,135 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:22:17,136 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 87 [2023-11-06 22:22:17,606 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:22:17,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454758922] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:22:17,607 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:22:17,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 6] total 15 [2023-11-06 22:22:17,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238448529] [2023-11-06 22:22:17,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:22:17,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-06 22:22:17,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:22:17,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-06 22:22:17,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2023-11-06 22:22:19,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 309 out of 802 [2023-11-06 22:22:19,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 80 transitions, 546 flow. Second operand has 17 states, 17 states have (on average 312.29411764705884) internal successors, (5309), 17 states have internal predecessors, (5309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:19,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:22:19,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 309 of 802 [2023-11-06 22:22:19,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:22:19,892 INFO L124 PetriNetUnfolderBase]: 1007/1475 cut-off events. [2023-11-06 22:22:19,893 INFO L125 PetriNetUnfolderBase]: For 2988/2988 co-relation queries the response was YES. [2023-11-06 22:22:19,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5933 conditions, 1475 events. 1007/1475 cut-off events. For 2988/2988 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 5452 event pairs, 210 based on Foata normal form. 1/1476 useless extension candidates. Maximal degree in co-relation 5882. Up to 1277 conditions per place. [2023-11-06 22:22:19,915 INFO L140 encePairwiseOnDemand]: 793/802 looper letters, 97 selfloop transitions, 40 changer transitions 1/138 dead transitions. [2023-11-06 22:22:19,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 138 transitions, 1099 flow [2023-11-06 22:22:19,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 22:22:19,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-06 22:22:19,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 3181 transitions. [2023-11-06 22:22:19,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39663341645885286 [2023-11-06 22:22:19,929 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 3181 transitions. [2023-11-06 22:22:19,930 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 3181 transitions. [2023-11-06 22:22:19,932 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:22:19,933 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 3181 transitions. [2023-11-06 22:22:19,941 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 318.1) internal successors, (3181), 10 states have internal predecessors, (3181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:19,958 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 802.0) internal successors, (8822), 11 states have internal predecessors, (8822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:19,961 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 802.0) internal successors, (8822), 11 states have internal predecessors, (8822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:19,961 INFO L175 Difference]: Start difference. First operand has 64 places, 80 transitions, 546 flow. Second operand 10 states and 3181 transitions. [2023-11-06 22:22:19,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 138 transitions, 1099 flow [2023-11-06 22:22:19,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 138 transitions, 1063 flow, removed 17 selfloop flow, removed 1 redundant places. [2023-11-06 22:22:19,977 INFO L231 Difference]: Finished difference. Result has 77 places, 100 transitions, 811 flow [2023-11-06 22:22:19,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=802, PETRI_DIFFERENCE_MINUEND_FLOW=516, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=811, PETRI_PLACES=77, PETRI_TRANSITIONS=100} [2023-11-06 22:22:19,978 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 45 predicate places. [2023-11-06 22:22:19,978 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 100 transitions, 811 flow [2023-11-06 22:22:19,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 312.29411764705884) internal successors, (5309), 17 states have internal predecessors, (5309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:19,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:22:19,981 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:22:19,992 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5aa8abe-0bc3-4033-9f24-5f997152a194/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 22:22:20,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5aa8abe-0bc3-4033-9f24-5f997152a194/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 22:22:20,188 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 22:22:20,188 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:22:20,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1927074063, now seen corresponding path program 4 times [2023-11-06 22:22:20,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:22:20,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194028936] [2023-11-06 22:22:20,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:22:20,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:22:20,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:22:21,105 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:22:21,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:22:21,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194028936] [2023-11-06 22:22:21,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194028936] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:22:21,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548960489] [2023-11-06 22:22:21,106 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:22:21,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:22:21,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5aa8abe-0bc3-4033-9f24-5f997152a194/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:22:21,108 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5aa8abe-0bc3-4033-9f24-5f997152a194/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:22:21,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5aa8abe-0bc3-4033-9f24-5f997152a194/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 22:22:21,267 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:22:21,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:22:21,270 INFO L262 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-06 22:22:21,273 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:22:21,578 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:22:21,578 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2023-11-06 22:22:21,589 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:22:21,589 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:22:21,765 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:22:21,766 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 87 [2023-11-06 22:22:22,169 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:22:22,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548960489] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:22:22,169 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:22:22,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 6] total 15 [2023-11-06 22:22:22,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958152151] [2023-11-06 22:22:22,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:22:22,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-06 22:22:22,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:22:22,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-06 22:22:22,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2023-11-06 22:22:23,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 309 out of 802 [2023-11-06 22:22:23,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 100 transitions, 811 flow. Second operand has 17 states, 17 states have (on average 312.29411764705884) internal successors, (5309), 17 states have internal predecessors, (5309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:23,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:22:23,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 309 of 802 [2023-11-06 22:22:23,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:22:24,338 INFO L124 PetriNetUnfolderBase]: 1139/1668 cut-off events. [2023-11-06 22:22:24,339 INFO L125 PetriNetUnfolderBase]: For 5013/5013 co-relation queries the response was YES. [2023-11-06 22:22:24,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7271 conditions, 1668 events. 1139/1668 cut-off events. For 5013/5013 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 6284 event pairs, 303 based on Foata normal form. 1/1669 useless extension candidates. Maximal degree in co-relation 7214. Up to 1464 conditions per place. [2023-11-06 22:22:24,362 INFO L140 encePairwiseOnDemand]: 793/802 looper letters, 102 selfloop transitions, 49 changer transitions 1/152 dead transitions. [2023-11-06 22:22:24,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 152 transitions, 1404 flow [2023-11-06 22:22:24,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 22:22:24,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-06 22:22:24,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 3177 transitions. [2023-11-06 22:22:24,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3961346633416459 [2023-11-06 22:22:24,377 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 3177 transitions. [2023-11-06 22:22:24,377 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 3177 transitions. [2023-11-06 22:22:24,380 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:22:24,380 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 3177 transitions. [2023-11-06 22:22:24,388 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 317.7) internal successors, (3177), 10 states have internal predecessors, (3177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:24,399 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 802.0) internal successors, (8822), 11 states have internal predecessors, (8822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:24,401 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 802.0) internal successors, (8822), 11 states have internal predecessors, (8822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:24,401 INFO L175 Difference]: Start difference. First operand has 77 places, 100 transitions, 811 flow. Second operand 10 states and 3177 transitions. [2023-11-06 22:22:24,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 152 transitions, 1404 flow [2023-11-06 22:22:24,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 152 transitions, 1311 flow, removed 13 selfloop flow, removed 4 redundant places. [2023-11-06 22:22:24,430 INFO L231 Difference]: Finished difference. Result has 88 places, 119 transitions, 1086 flow [2023-11-06 22:22:24,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=802, PETRI_DIFFERENCE_MINUEND_FLOW=728, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1086, PETRI_PLACES=88, PETRI_TRANSITIONS=119} [2023-11-06 22:22:24,431 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 56 predicate places. [2023-11-06 22:22:24,431 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 119 transitions, 1086 flow [2023-11-06 22:22:24,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 312.29411764705884) internal successors, (5309), 17 states have internal predecessors, (5309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:24,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:22:24,434 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:22:24,448 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5aa8abe-0bc3-4033-9f24-5f997152a194/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 22:22:24,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5aa8abe-0bc3-4033-9f24-5f997152a194/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-06 22:22:24,646 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 22:22:24,646 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:22:24,646 INFO L85 PathProgramCache]: Analyzing trace with hash -873544445, now seen corresponding path program 5 times [2023-11-06 22:22:24,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:22:24,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719489813] [2023-11-06 22:22:24,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:22:24,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:22:24,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:22:25,710 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:22:25,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:22:25,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719489813] [2023-11-06 22:22:25,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719489813] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:22:25,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599810619] [2023-11-06 22:22:25,711 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:22:25,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:22:25,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5aa8abe-0bc3-4033-9f24-5f997152a194/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:22:25,715 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5aa8abe-0bc3-4033-9f24-5f997152a194/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:22:25,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5aa8abe-0bc3-4033-9f24-5f997152a194/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 22:22:25,899 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:22:25,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:22:25,902 INFO L262 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-06 22:22:25,908 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:22:26,248 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:22:26,249 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2023-11-06 22:22:26,268 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:22:26,268 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:22:26,437 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:22:26,437 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 17 [2023-11-06 22:22:26,513 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:22:26,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599810619] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:22:26,514 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:22:26,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 6] total 15 [2023-11-06 22:22:26,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620967317] [2023-11-06 22:22:26,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:22:26,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-06 22:22:26,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:22:26,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-06 22:22:26,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2023-11-06 22:22:27,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 309 out of 802 [2023-11-06 22:22:27,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 119 transitions, 1086 flow. Second operand has 17 states, 17 states have (on average 312.29411764705884) internal successors, (5309), 17 states have internal predecessors, (5309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:27,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:22:27,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 309 of 802 [2023-11-06 22:22:27,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:22:29,067 INFO L124 PetriNetUnfolderBase]: 1349/1975 cut-off events. [2023-11-06 22:22:29,067 INFO L125 PetriNetUnfolderBase]: For 7702/7702 co-relation queries the response was YES. [2023-11-06 22:22:29,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9192 conditions, 1975 events. 1349/1975 cut-off events. For 7702/7702 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 7886 event pairs, 148 based on Foata normal form. 1/1976 useless extension candidates. Maximal degree in co-relation 9129. Up to 1639 conditions per place. [2023-11-06 22:22:29,107 INFO L140 encePairwiseOnDemand]: 791/802 looper letters, 114 selfloop transitions, 67 changer transitions 1/182 dead transitions. [2023-11-06 22:22:29,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 182 transitions, 1774 flow [2023-11-06 22:22:29,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 22:22:29,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-06 22:22:29,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 3191 transitions. [2023-11-06 22:22:29,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39788029925187035 [2023-11-06 22:22:29,119 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 3191 transitions. [2023-11-06 22:22:29,119 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 3191 transitions. [2023-11-06 22:22:29,122 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:22:29,122 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 3191 transitions. [2023-11-06 22:22:29,140 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 319.1) internal successors, (3191), 10 states have internal predecessors, (3191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:29,151 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 802.0) internal successors, (8822), 11 states have internal predecessors, (8822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:29,152 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 802.0) internal successors, (8822), 11 states have internal predecessors, (8822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:29,153 INFO L175 Difference]: Start difference. First operand has 88 places, 119 transitions, 1086 flow. Second operand 10 states and 3191 transitions. [2023-11-06 22:22:29,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 182 transitions, 1774 flow [2023-11-06 22:22:29,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 182 transitions, 1676 flow, removed 30 selfloop flow, removed 2 redundant places. [2023-11-06 22:22:29,209 INFO L231 Difference]: Finished difference. Result has 99 places, 139 transitions, 1396 flow [2023-11-06 22:22:29,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=802, PETRI_DIFFERENCE_MINUEND_FLOW=994, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1396, PETRI_PLACES=99, PETRI_TRANSITIONS=139} [2023-11-06 22:22:29,211 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 67 predicate places. [2023-11-06 22:22:29,211 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 139 transitions, 1396 flow [2023-11-06 22:22:29,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 312.29411764705884) internal successors, (5309), 17 states have internal predecessors, (5309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:29,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:22:29,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:22:29,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5aa8abe-0bc3-4033-9f24-5f997152a194/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 22:22:29,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5aa8abe-0bc3-4033-9f24-5f997152a194/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-06 22:22:29,424 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 22:22:29,424 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:22:29,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1504421425, now seen corresponding path program 6 times [2023-11-06 22:22:29,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:22:29,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273162249] [2023-11-06 22:22:29,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:22:29,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:22:29,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:22:30,279 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:22:30,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:22:30,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273162249] [2023-11-06 22:22:30,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273162249] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:22:30,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656414864] [2023-11-06 22:22:30,279 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:22:30,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:22:30,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5aa8abe-0bc3-4033-9f24-5f997152a194/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:22:30,281 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5aa8abe-0bc3-4033-9f24-5f997152a194/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:22:30,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5aa8abe-0bc3-4033-9f24-5f997152a194/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 22:22:30,461 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-06 22:22:30,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:22:30,465 INFO L262 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-06 22:22:30,467 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:22:30,784 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:22:30,785 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2023-11-06 22:22:30,797 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:22:30,798 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:22:30,951 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:22:30,952 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 17 [2023-11-06 22:22:31,006 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:22:31,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656414864] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:22:31,006 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:22:31,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 6] total 15 [2023-11-06 22:22:31,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050904422] [2023-11-06 22:22:31,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:22:31,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-06 22:22:31,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:22:31,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-06 22:22:31,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2023-11-06 22:22:32,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 309 out of 802 [2023-11-06 22:22:32,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 139 transitions, 1396 flow. Second operand has 17 states, 17 states have (on average 312.1764705882353) internal successors, (5307), 17 states have internal predecessors, (5307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:32,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:22:32,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 309 of 802 [2023-11-06 22:22:32,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:22:33,604 INFO L124 PetriNetUnfolderBase]: 1439/2108 cut-off events. [2023-11-06 22:22:33,604 INFO L125 PetriNetUnfolderBase]: For 10548/10548 co-relation queries the response was YES. [2023-11-06 22:22:33,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10414 conditions, 2108 events. 1439/2108 cut-off events. For 10548/10548 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 8539 event pairs, 194 based on Foata normal form. 1/2109 useless extension candidates. Maximal degree in co-relation 10347. Up to 1772 conditions per place. [2023-11-06 22:22:33,631 INFO L140 encePairwiseOnDemand]: 791/802 looper letters, 121 selfloop transitions, 70 changer transitions 1/192 dead transitions. [2023-11-06 22:22:33,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 192 transitions, 2075 flow [2023-11-06 22:22:33,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 22:22:33,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-06 22:22:33,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 3189 transitions. [2023-11-06 22:22:33,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39763092269326683 [2023-11-06 22:22:33,642 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 3189 transitions. [2023-11-06 22:22:33,642 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 3189 transitions. [2023-11-06 22:22:33,645 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:22:33,645 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 3189 transitions. [2023-11-06 22:22:33,650 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 318.9) internal successors, (3189), 10 states have internal predecessors, (3189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:33,658 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 802.0) internal successors, (8822), 11 states have internal predecessors, (8822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:33,659 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 802.0) internal successors, (8822), 11 states have internal predecessors, (8822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:33,659 INFO L175 Difference]: Start difference. First operand has 99 places, 139 transitions, 1396 flow. Second operand 10 states and 3189 transitions. [2023-11-06 22:22:33,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 192 transitions, 2075 flow [2023-11-06 22:22:33,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 192 transitions, 1951 flow, removed 45 selfloop flow, removed 3 redundant places. [2023-11-06 22:22:33,713 INFO L231 Difference]: Finished difference. Result has 109 places, 151 transitions, 1644 flow [2023-11-06 22:22:33,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=802, PETRI_DIFFERENCE_MINUEND_FLOW=1272, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1644, PETRI_PLACES=109, PETRI_TRANSITIONS=151} [2023-11-06 22:22:33,714 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 77 predicate places. [2023-11-06 22:22:33,714 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 151 transitions, 1644 flow [2023-11-06 22:22:33,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 312.1764705882353) internal successors, (5307), 17 states have internal predecessors, (5307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:33,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:22:33,715 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:22:33,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5aa8abe-0bc3-4033-9f24-5f997152a194/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 22:22:33,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5aa8abe-0bc3-4033-9f24-5f997152a194/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:22:33,915 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 22:22:33,916 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:22:33,916 INFO L85 PathProgramCache]: Analyzing trace with hash -2136670787, now seen corresponding path program 7 times [2023-11-06 22:22:33,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:22:33,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278686357] [2023-11-06 22:22:33,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:22:33,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:22:34,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:22:35,028 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:22:35,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:22:35,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278686357] [2023-11-06 22:22:35,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278686357] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:22:35,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774767380] [2023-11-06 22:22:35,029 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:22:35,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:22:35,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5aa8abe-0bc3-4033-9f24-5f997152a194/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:22:35,031 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5aa8abe-0bc3-4033-9f24-5f997152a194/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:22:35,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5aa8abe-0bc3-4033-9f24-5f997152a194/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 22:22:35,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:22:35,210 INFO L262 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-06 22:22:35,213 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:22:35,243 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-06 22:22:35,291 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-06 22:22:35,291 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-06 22:22:35,597 INFO L322 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2023-11-06 22:22:35,597 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 35 [2023-11-06 22:22:35,766 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:22:35,766 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 66 treesize of output 94 [2023-11-06 22:22:35,842 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:22:35,842 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:22:37,659 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:22:37,660 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 40 [2023-11-06 22:22:37,909 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:22:37,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774767380] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:22:37,910 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:22:37,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 19 [2023-11-06 22:22:37,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189880019] [2023-11-06 22:22:37,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:22:37,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-06 22:22:37,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:22:37,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-06 22:22:37,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2023-11-06 22:22:40,317 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:22:41,814 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:22:46,072 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:22:47,940 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:22:52,041 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:22:53,538 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:22:54,953 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:22:57,910 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:22:58,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 295 out of 802 [2023-11-06 22:22:58,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 151 transitions, 1644 flow. Second operand has 21 states, 21 states have (on average 297.4761904761905) internal successors, (6247), 21 states have internal predecessors, (6247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:58,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:22:58,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 295 of 802 [2023-11-06 22:22:58,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:23:00,008 INFO L124 PetriNetUnfolderBase]: 1527/2237 cut-off events. [2023-11-06 22:23:00,008 INFO L125 PetriNetUnfolderBase]: For 12524/12524 co-relation queries the response was YES. [2023-11-06 22:23:00,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11466 conditions, 2237 events. 1527/2237 cut-off events. For 12524/12524 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 9179 event pairs, 210 based on Foata normal form. 1/2238 useless extension candidates. Maximal degree in co-relation 11394. Up to 1905 conditions per place. [2023-11-06 22:23:00,042 INFO L140 encePairwiseOnDemand]: 789/802 looper letters, 122 selfloop transitions, 74 changer transitions 1/197 dead transitions. [2023-11-06 22:23:00,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 197 transitions, 2262 flow [2023-11-06 22:23:00,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-06 22:23:00,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-06 22:23:00,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 3344 transitions. [2023-11-06 22:23:00,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3790523690773067 [2023-11-06 22:23:00,053 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 3344 transitions. [2023-11-06 22:23:00,053 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 3344 transitions. [2023-11-06 22:23:00,056 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:23:00,056 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 3344 transitions. [2023-11-06 22:23:00,065 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 304.0) internal successors, (3344), 11 states have internal predecessors, (3344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:23:00,077 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 802.0) internal successors, (9624), 12 states have internal predecessors, (9624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:23:00,078 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 802.0) internal successors, (9624), 12 states have internal predecessors, (9624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:23:00,079 INFO L175 Difference]: Start difference. First operand has 109 places, 151 transitions, 1644 flow. Second operand 11 states and 3344 transitions. [2023-11-06 22:23:00,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 197 transitions, 2262 flow [2023-11-06 22:23:00,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 197 transitions, 2085 flow, removed 45 selfloop flow, removed 4 redundant places. [2023-11-06 22:23:00,149 INFO L231 Difference]: Finished difference. Result has 117 places, 157 transitions, 1729 flow [2023-11-06 22:23:00,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=802, PETRI_DIFFERENCE_MINUEND_FLOW=1467, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1729, PETRI_PLACES=117, PETRI_TRANSITIONS=157} [2023-11-06 22:23:00,150 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 85 predicate places. [2023-11-06 22:23:00,150 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 157 transitions, 1729 flow [2023-11-06 22:23:00,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 297.4761904761905) internal successors, (6247), 21 states have internal predecessors, (6247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:23:00,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:23:00,151 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:23:00,163 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5aa8abe-0bc3-4033-9f24-5f997152a194/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 22:23:00,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5aa8abe-0bc3-4033-9f24-5f997152a194/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-06 22:23:00,358 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 22:23:00,358 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:23:00,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1909519051, now seen corresponding path program 8 times [2023-11-06 22:23:00,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:23:00,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079028101] [2023-11-06 22:23:00,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:23:00,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:23:00,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:23:01,356 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:23:01,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:23:01,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079028101] [2023-11-06 22:23:01,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079028101] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:23:01,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402236487] [2023-11-06 22:23:01,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:23:01,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:23:01,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5aa8abe-0bc3-4033-9f24-5f997152a194/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:23:01,359 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5aa8abe-0bc3-4033-9f24-5f997152a194/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:23:01,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5aa8abe-0bc3-4033-9f24-5f997152a194/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 22:23:01,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:23:01,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:23:01,544 INFO L262 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-06 22:23:01,546 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:23:01,570 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-06 22:23:01,605 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-06 22:23:01,605 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-06 22:23:01,862 INFO L322 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2023-11-06 22:23:01,862 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 35 [2023-11-06 22:23:02,124 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:23:02,124 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 66 treesize of output 94 [2023-11-06 22:23:02,202 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:23:02,202 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:23:02,940 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:23:02,940 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 40 [2023-11-06 22:23:03,181 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:23:03,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402236487] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:23:03,182 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:23:03,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 20 [2023-11-06 22:23:03,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704230292] [2023-11-06 22:23:03,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:23:03,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-06 22:23:03,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:23:03,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-06 22:23:03,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2023-11-06 22:23:08,169 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:23:10,277 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:23:11,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 295 out of 802 [2023-11-06 22:23:11,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 157 transitions, 1729 flow. Second operand has 22 states, 22 states have (on average 297.40909090909093) internal successors, (6543), 22 states have internal predecessors, (6543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:23:11,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:23:11,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 295 of 802 [2023-11-06 22:23:11,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:23:12,576 INFO L124 PetriNetUnfolderBase]: 1671/2446 cut-off events. [2023-11-06 22:23:12,576 INFO L125 PetriNetUnfolderBase]: For 15268/15268 co-relation queries the response was YES. [2023-11-06 22:23:12,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12527 conditions, 2446 events. 1671/2446 cut-off events. For 15268/15268 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 10305 event pairs, 224 based on Foata normal form. 1/2447 useless extension candidates. Maximal degree in co-relation 12451. Up to 2030 conditions per place. [2023-11-06 22:23:12,612 INFO L140 encePairwiseOnDemand]: 789/802 looper letters, 128 selfloop transitions, 78 changer transitions 1/207 dead transitions. [2023-11-06 22:23:12,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 207 transitions, 2436 flow [2023-11-06 22:23:12,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-06 22:23:12,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-06 22:23:12,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 3344 transitions. [2023-11-06 22:23:12,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3790523690773067 [2023-11-06 22:23:12,619 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 3344 transitions. [2023-11-06 22:23:12,620 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 3344 transitions. [2023-11-06 22:23:12,621 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:23:12,622 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 3344 transitions. [2023-11-06 22:23:12,628 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 304.0) internal successors, (3344), 11 states have internal predecessors, (3344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:23:12,640 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 802.0) internal successors, (9624), 12 states have internal predecessors, (9624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:23:12,641 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 802.0) internal successors, (9624), 12 states have internal predecessors, (9624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:23:12,642 INFO L175 Difference]: Start difference. First operand has 117 places, 157 transitions, 1729 flow. Second operand 11 states and 3344 transitions. [2023-11-06 22:23:12,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 207 transitions, 2436 flow [2023-11-06 22:23:12,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 207 transitions, 2275 flow, removed 37 selfloop flow, removed 7 redundant places. [2023-11-06 22:23:12,720 INFO L231 Difference]: Finished difference. Result has 122 places, 167 transitions, 1914 flow [2023-11-06 22:23:12,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=802, PETRI_DIFFERENCE_MINUEND_FLOW=1568, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1914, PETRI_PLACES=122, PETRI_TRANSITIONS=167} [2023-11-06 22:23:12,722 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 90 predicate places. [2023-11-06 22:23:12,722 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 167 transitions, 1914 flow [2023-11-06 22:23:12,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 297.40909090909093) internal successors, (6543), 22 states have internal predecessors, (6543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:23:12,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:23:12,724 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:23:12,740 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5aa8abe-0bc3-4033-9f24-5f997152a194/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 22:23:12,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5aa8abe-0bc3-4033-9f24-5f997152a194/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:23:12,931 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 22:23:12,931 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:23:12,931 INFO L85 PathProgramCache]: Analyzing trace with hash -124214767, now seen corresponding path program 9 times [2023-11-06 22:23:12,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:23:12,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498736823] [2023-11-06 22:23:12,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:23:12,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:23:13,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:23:14,709 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:23:14,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:23:14,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498736823] [2023-11-06 22:23:14,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498736823] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:23:14,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767757704] [2023-11-06 22:23:14,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:23:14,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:23:14,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5aa8abe-0bc3-4033-9f24-5f997152a194/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:23:14,711 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5aa8abe-0bc3-4033-9f24-5f997152a194/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:23:14,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5aa8abe-0bc3-4033-9f24-5f997152a194/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 22:23:15,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-06 22:23:15,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:23:15,138 INFO L262 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-06 22:23:15,140 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:23:15,194 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-06 22:23:15,278 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-06 22:23:15,278 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-06 22:23:15,655 INFO L322 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2023-11-06 22:23:15,656 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 35 [2023-11-06 22:23:15,851 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:23:15,852 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 66 treesize of output 94 [2023-11-06 22:23:15,907 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:23:15,908 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:23:18,869 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:23:18,870 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 40 [2023-11-06 22:23:19,137 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:23:19,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767757704] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:23:19,138 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:23:19,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 9] total 25 [2023-11-06 22:23:19,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129999012] [2023-11-06 22:23:19,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:23:19,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-06 22:23:19,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:23:19,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-06 22:23:19,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=602, Unknown=0, NotChecked=0, Total=702 [2023-11-06 22:23:20,261 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:23:26,952 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:23:29,197 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:23:34,428 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:23:38,591 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:23:44,341 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:23:47,767 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:23:53,087 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:23:54,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 282 out of 802 [2023-11-06 22:23:54,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 167 transitions, 1914 flow. Second operand has 27 states, 27 states have (on average 284.3333333333333) internal successors, (7677), 27 states have internal predecessors, (7677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:23:54,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:23:54,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 282 of 802 [2023-11-06 22:23:54,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:23:56,098 INFO L124 PetriNetUnfolderBase]: 1759/2575 cut-off events. [2023-11-06 22:23:56,098 INFO L125 PetriNetUnfolderBase]: For 17170/17170 co-relation queries the response was YES. [2023-11-06 22:23:56,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13637 conditions, 2575 events. 1759/2575 cut-off events. For 17170/17170 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 10945 event pairs, 286 based on Foata normal form. 1/2576 useless extension candidates. Maximal degree in co-relation 13558. Up to 2243 conditions per place. [2023-11-06 22:23:56,134 INFO L140 encePairwiseOnDemand]: 786/802 looper letters, 136 selfloop transitions, 75 changer transitions 1/212 dead transitions. [2023-11-06 22:23:56,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 212 transitions, 2586 flow [2023-11-06 22:23:56,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 22:23:56,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-06 22:23:56,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 3766 transitions. [2023-11-06 22:23:56,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.361212353731057 [2023-11-06 22:23:56,143 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 3766 transitions. [2023-11-06 22:23:56,143 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 3766 transitions. [2023-11-06 22:23:56,145 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:23:56,145 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 3766 transitions. [2023-11-06 22:23:56,153 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 289.6923076923077) internal successors, (3766), 13 states have internal predecessors, (3766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:23:56,165 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 802.0) internal successors, (11228), 14 states have internal predecessors, (11228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:23:56,167 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 802.0) internal successors, (11228), 14 states have internal predecessors, (11228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:23:56,167 INFO L175 Difference]: Start difference. First operand has 122 places, 167 transitions, 1914 flow. Second operand 13 states and 3766 transitions. [2023-11-06 22:23:56,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 212 transitions, 2586 flow [2023-11-06 22:23:56,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 212 transitions, 2349 flow, removed 78 selfloop flow, removed 6 redundant places. [2023-11-06 22:23:56,294 INFO L231 Difference]: Finished difference. Result has 130 places, 173 transitions, 1972 flow [2023-11-06 22:23:56,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=802, PETRI_DIFFERENCE_MINUEND_FLOW=1709, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1972, PETRI_PLACES=130, PETRI_TRANSITIONS=173} [2023-11-06 22:23:56,295 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 98 predicate places. [2023-11-06 22:23:56,295 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 173 transitions, 1972 flow [2023-11-06 22:23:56,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 284.3333333333333) internal successors, (7677), 27 states have internal predecessors, (7677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:23:56,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:23:56,297 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:23:56,304 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5aa8abe-0bc3-4033-9f24-5f997152a194/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-06 22:23:56,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5aa8abe-0bc3-4033-9f24-5f997152a194/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-06 22:23:56,500 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 22:23:56,500 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:23:56,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1174728829, now seen corresponding path program 10 times [2023-11-06 22:23:56,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:23:56,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62014909] [2023-11-06 22:23:56,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:23:56,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:23:56,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:23:57,675 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:23:57,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:23:57,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62014909] [2023-11-06 22:23:57,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62014909] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:23:57,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433879338] [2023-11-06 22:23:57,676 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:23:57,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:23:57,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5aa8abe-0bc3-4033-9f24-5f997152a194/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:23:57,678 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5aa8abe-0bc3-4033-9f24-5f997152a194/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:23:57,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5aa8abe-0bc3-4033-9f24-5f997152a194/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 22:23:57,881 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:23:57,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:23:57,884 INFO L262 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 41 conjunts are in the unsatisfiable core [2023-11-06 22:23:57,886 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:23:58,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:58,292 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-06 22:23:58,498 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:23:58,498 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2023-11-06 22:23:58,511 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:23:58,511 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:23:58,692 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_753 (Array Int Int))) (= (+ c_~asum~0 c_~bsum~0) (+ c_~csum~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_753) c_~A~0.base) c_~A~0.offset)))) is different from false [2023-11-06 22:23:58,705 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:23:58,705 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 36 [2023-11-06 22:23:58,710 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-11-06 22:23:58,861 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 1 not checked. [2023-11-06 22:23:58,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433879338] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:23:58,861 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:23:58,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2023-11-06 22:23:58,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528202175] [2023-11-06 22:23:58,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:23:58,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-06 22:23:58,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:23:58,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-06 22:23:58,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=509, Unknown=1, NotChecked=46, Total=650 [2023-11-06 22:23:59,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 277 out of 802 [2023-11-06 22:23:59,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 173 transitions, 1972 flow. Second operand has 26 states, 26 states have (on average 279.6923076923077) internal successors, (7272), 26 states have internal predecessors, (7272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:23:59,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:23:59,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 277 of 802 [2023-11-06 22:23:59,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:24:00,545 INFO L124 PetriNetUnfolderBase]: 1927/2820 cut-off events. [2023-11-06 22:24:00,545 INFO L125 PetriNetUnfolderBase]: For 18953/18953 co-relation queries the response was YES. [2023-11-06 22:24:00,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14777 conditions, 2820 events. 1927/2820 cut-off events. For 18953/18953 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 12262 event pairs, 264 based on Foata normal form. 1/2821 useless extension candidates. Maximal degree in co-relation 14692. Up to 2300 conditions per place. [2023-11-06 22:24:00,584 INFO L140 encePairwiseOnDemand]: 791/802 looper letters, 143 selfloop transitions, 88 changer transitions 1/232 dead transitions. [2023-11-06 22:24:00,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 232 transitions, 2783 flow [2023-11-06 22:24:00,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-06 22:24:00,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-06 22:24:00,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 3148 transitions. [2023-11-06 22:24:00,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3568351847653593 [2023-11-06 22:24:00,593 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 3148 transitions. [2023-11-06 22:24:00,593 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 3148 transitions. [2023-11-06 22:24:00,594 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:24:00,595 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 3148 transitions. [2023-11-06 22:24:00,601 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 286.1818181818182) internal successors, (3148), 11 states have internal predecessors, (3148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:24:00,610 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 802.0) internal successors, (9624), 12 states have internal predecessors, (9624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:24:00,612 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 802.0) internal successors, (9624), 12 states have internal predecessors, (9624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:24:00,612 INFO L175 Difference]: Start difference. First operand has 130 places, 173 transitions, 1972 flow. Second operand 11 states and 3148 transitions. [2023-11-06 22:24:00,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 232 transitions, 2783 flow [2023-11-06 22:24:00,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 232 transitions, 2577 flow, removed 32 selfloop flow, removed 8 redundant places. [2023-11-06 22:24:00,740 INFO L231 Difference]: Finished difference. Result has 136 places, 189 transitions, 2236 flow [2023-11-06 22:24:00,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=802, PETRI_DIFFERENCE_MINUEND_FLOW=1766, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2236, PETRI_PLACES=136, PETRI_TRANSITIONS=189} [2023-11-06 22:24:00,741 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 104 predicate places. [2023-11-06 22:24:00,741 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 189 transitions, 2236 flow [2023-11-06 22:24:00,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 279.6923076923077) internal successors, (7272), 26 states have internal predecessors, (7272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:24:00,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:24:00,743 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:24:00,756 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5aa8abe-0bc3-4033-9f24-5f997152a194/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-06 22:24:00,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5aa8abe-0bc3-4033-9f24-5f997152a194/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:24:00,956 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 22:24:00,956 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:24:00,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1427615511, now seen corresponding path program 11 times [2023-11-06 22:24:00,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:24:00,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680670282] [2023-11-06 22:24:00,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:24:00,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:24:01,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:24:02,338 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:24:02,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:24:02,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680670282] [2023-11-06 22:24:02,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680670282] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:24:02,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418981087] [2023-11-06 22:24:02,339 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:24:02,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:24:02,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5aa8abe-0bc3-4033-9f24-5f997152a194/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:24:02,341 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5aa8abe-0bc3-4033-9f24-5f997152a194/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:24:02,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5aa8abe-0bc3-4033-9f24-5f997152a194/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-06 22:24:02,520 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-06 22:24:02,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:24:02,523 INFO L262 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 55 conjunts are in the unsatisfiable core [2023-11-06 22:24:02,527 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:24:02,536 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 84 [2023-11-06 22:24:02,578 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-06 22:24:02,654 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-06 22:24:02,654 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-06 22:24:02,864 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-06 22:24:02,966 INFO L322 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2023-11-06 22:24:02,966 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 35 [2023-11-06 22:24:03,165 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:24:03,165 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 96 [2023-11-06 22:24:03,283 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:24:03,283 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:24:03,785 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:24:03,786 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1610 treesize of output 1414 [2023-11-06 22:24:03,824 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:24:03,825 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 566 treesize of output 542 [2023-11-06 22:24:06,784 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 65 [2023-11-06 22:24:07,573 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:24:07,574 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 47 [2023-11-06 22:24:07,579 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 39 [2023-11-06 22:24:07,596 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 80 [2023-11-06 22:24:07,606 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:24:07,607 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 62 [2023-11-06 22:24:07,641 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-11-06 22:24:07,647 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 38 [2023-11-06 22:24:07,651 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 34 [2023-11-06 22:24:07,669 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 383 treesize of output 363 [2023-11-06 22:24:07,686 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:24:07,687 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 380 treesize of output 260 [2023-11-06 22:24:07,722 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2023-11-06 22:24:07,773 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:24:07,773 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 105 treesize of output 95 [2023-11-06 22:24:07,918 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 8 [2023-11-06 22:24:07,932 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:24:07,933 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 17 [2023-11-06 22:24:07,962 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:24:07,963 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 46 [2023-11-06 22:24:08,013 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-11-06 22:24:08,018 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-11-06 22:24:08,026 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-11-06 22:24:08,030 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-11-06 22:24:08,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:08,052 INFO L322 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-06 22:24:08,053 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 400 treesize of output 1 [2023-11-06 22:24:08,343 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:24:08,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418981087] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:24:08,344 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:24:08,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2023-11-06 22:24:08,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639426227] [2023-11-06 22:24:08,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:24:08,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 22:24:08,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:24:08,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 22:24:08,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=497, Unknown=23, NotChecked=0, Total=600 [2023-11-06 22:24:10,125 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:24:17,114 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:24:19,122 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:24:24,479 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:24:27,837 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:24:30,343 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:24:35,237 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:24:37,206 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:24:42,658 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:24:45,201 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:24:50,399 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:24:51,673 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:24:55,071 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:24:57,939 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:24:57,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 265 out of 802 [2023-11-06 22:24:57,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 189 transitions, 2236 flow. Second operand has 25 states, 25 states have (on average 267.08) internal successors, (6677), 25 states have internal predecessors, (6677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:24:57,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:24:57,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 265 of 802 [2023-11-06 22:24:57,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:24:59,650 INFO L124 PetriNetUnfolderBase]: 2015/2949 cut-off events. [2023-11-06 22:24:59,650 INFO L125 PetriNetUnfolderBase]: For 22939/22939 co-relation queries the response was YES. [2023-11-06 22:24:59,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16168 conditions, 2949 events. 2015/2949 cut-off events. For 22939/22939 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 12939 event pairs, 268 based on Foata normal form. 1/2950 useless extension candidates. Maximal degree in co-relation 16085. Up to 2437 conditions per place. [2023-11-06 22:24:59,680 INFO L140 encePairwiseOnDemand]: 790/802 looper letters, 146 selfloop transitions, 89 changer transitions 1/236 dead transitions. [2023-11-06 22:24:59,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 236 transitions, 2992 flow [2023-11-06 22:24:59,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 22:24:59,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-06 22:24:59,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3279 transitions. [2023-11-06 22:24:59,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34071072319201995 [2023-11-06 22:24:59,687 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3279 transitions. [2023-11-06 22:24:59,687 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3279 transitions. [2023-11-06 22:24:59,688 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:24:59,688 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3279 transitions. [2023-11-06 22:24:59,694 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 273.25) internal successors, (3279), 12 states have internal predecessors, (3279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:24:59,702 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 802.0) internal successors, (10426), 13 states have internal predecessors, (10426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:24:59,704 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 802.0) internal successors, (10426), 13 states have internal predecessors, (10426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:24:59,704 INFO L175 Difference]: Start difference. First operand has 136 places, 189 transitions, 2236 flow. Second operand 12 states and 3279 transitions. [2023-11-06 22:24:59,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 236 transitions, 2992 flow [2023-11-06 22:24:59,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 236 transitions, 2846 flow, removed 55 selfloop flow, removed 4 redundant places. [2023-11-06 22:24:59,839 INFO L231 Difference]: Finished difference. Result has 145 places, 195 transitions, 2432 flow [2023-11-06 22:24:59,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=802, PETRI_DIFFERENCE_MINUEND_FLOW=2100, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2432, PETRI_PLACES=145, PETRI_TRANSITIONS=195} [2023-11-06 22:24:59,840 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 113 predicate places. [2023-11-06 22:24:59,840 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 195 transitions, 2432 flow [2023-11-06 22:24:59,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 267.08) internal successors, (6677), 25 states have internal predecessors, (6677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:24:59,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:24:59,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:24:59,849 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5aa8abe-0bc3-4033-9f24-5f997152a194/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-06 22:25:00,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5aa8abe-0bc3-4033-9f24-5f997152a194/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:25:00,049 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 22:25:00,049 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:25:00,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1116741473, now seen corresponding path program 12 times [2023-11-06 22:25:00,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:25:00,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701780047] [2023-11-06 22:25:00,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:25:00,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:25:00,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:25:01,578 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:25:01,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:25:01,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701780047] [2023-11-06 22:25:01,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701780047] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:25:01,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575146900] [2023-11-06 22:25:01,579 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:25:01,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:25:01,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5aa8abe-0bc3-4033-9f24-5f997152a194/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:25:01,582 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5aa8abe-0bc3-4033-9f24-5f997152a194/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:25:01,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5aa8abe-0bc3-4033-9f24-5f997152a194/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-06 22:25:01,765 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-06 22:25:01,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:25:01,767 INFO L262 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 55 conjunts are in the unsatisfiable core [2023-11-06 22:25:01,770 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:25:01,778 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 84 [2023-11-06 22:25:01,836 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-06 22:25:01,917 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-06 22:25:01,918 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-06 22:25:02,208 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-06 22:25:02,344 INFO L322 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2023-11-06 22:25:02,344 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 35 [2023-11-06 22:25:02,646 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:25:02,646 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 96 [2023-11-06 22:25:02,731 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:25:02,731 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:25:06,777 WARN L839 $PredicateComparison]: unable to prove that (forall ((~C~0.offset Int) (v_ArrVal_869 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_869))) (let ((.cse1 (select (select .cse0 c_~A~0.base) c_~A~0.offset)) (.cse2 (select (select .cse0 c_~B~0.base) c_~B~0.offset))) (= (+ c_~asum~0 c_~bsum~0 (select (select (store .cse0 c_~C~0.base (store (select .cse0 c_~C~0.base) ~C~0.offset (+ .cse1 .cse2))) c_~B~0.base) c_~B~0.offset)) (+ .cse1 .cse2 c_~csum~0))))) is different from false [2023-11-06 22:25:06,834 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:25:06,835 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1440 treesize of output 1274 [2023-11-06 22:25:06,871 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:25:06,872 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 566 treesize of output 542 [2023-11-06 22:25:10,861 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:25:10,861 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 51 [2023-11-06 22:25:10,893 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:25:10,893 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 56 [2023-11-06 22:25:10,948 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 8 [2023-11-06 22:25:10,960 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 35 [2023-11-06 22:25:11,013 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:25:11,013 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 371 treesize of output 265 [2023-11-06 22:25:11,144 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-11-06 22:25:11,150 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-11-06 22:25:11,154 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-11-06 22:25:11,161 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-11-06 22:25:11,200 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:25:11,201 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 310 treesize of output 222 [2023-11-06 22:25:11,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:25:11,458 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-11-06 22:25:11,525 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-11-06 22:25:11,532 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-11-06 22:25:11,538 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-11-06 22:25:11,547 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-11-06 22:25:11,552 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-11-06 22:25:11,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:25:11,565 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-11-06 22:25:11,591 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 735 treesize of output 707 [2023-11-06 22:25:11,626 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:25:11,626 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 512 treesize of output 316 [2023-11-06 22:25:11,767 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:25:11,768 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 757 treesize of output 499 [2023-11-06 22:25:11,835 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-11-06 22:25:11,841 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-11-06 22:25:11,846 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-11-06 22:25:11,852 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-11-06 22:25:11,860 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-11-06 22:25:12,190 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 1 not checked. [2023-11-06 22:25:12,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575146900] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:25:12,191 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:25:12,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 31 [2023-11-06 22:25:12,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663041054] [2023-11-06 22:25:12,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:25:12,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-06 22:25:12,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:25:12,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-06 22:25:12,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=865, Unknown=1, NotChecked=60, Total=1056