./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-max-array.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9c0b84-4e37-457f-8a2f-c9f0d1ef985b/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9c0b84-4e37-457f-8a2f-c9f0d1ef985b/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9c0b84-4e37-457f-8a2f-c9f0d1ef985b/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9c0b84-4e37-457f-8a2f-c9f0d1ef985b/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-max-array.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9c0b84-4e37-457f-8a2f-c9f0d1ef985b/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9c0b84-4e37-457f-8a2f-c9f0d1ef985b/bin/uautomizer-verify-uCwYo4JHxu --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 573af40880ce1d61666f10a2729c7d6ecdb02e81781df2543efcfdd5788ab6d6 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:42:51,025 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:42:51,151 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9c0b84-4e37-457f-8a2f-c9f0d1ef985b/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:42:51,166 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:42:51,167 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:42:51,218 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:42:51,219 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:42:51,220 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:42:51,221 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:42:51,227 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:42:51,228 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:42:51,229 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:42:51,230 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:42:51,232 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:42:51,233 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:42:51,233 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:42:51,234 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:42:51,234 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:42:51,235 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:42:51,235 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:42:51,236 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:42:51,237 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:42:51,237 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:42:51,238 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:42:51,238 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:42:51,239 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:42:51,240 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:42:51,241 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:42:51,241 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:42:51,242 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:42:51,244 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:42:51,244 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:42:51,244 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:42:51,245 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:42:51,245 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:42:51,245 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:42:51,246 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:42:51,246 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:42:51,246 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:42:51,246 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_5e9c0b84-4e37-457f-8a2f-c9f0d1ef985b/bin/uautomizer-verify-uCwYo4JHxu/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9c0b84-4e37-457f-8a2f-c9f0d1ef985b/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 573af40880ce1d61666f10a2729c7d6ecdb02e81781df2543efcfdd5788ab6d6 [2023-11-19 07:42:51,552 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:42:51,575 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:42:51,578 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:42:51,579 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:42:51,580 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:42:51,581 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9c0b84-4e37-457f-8a2f-c9f0d1ef985b/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/weaver/popl20-more-max-array.wvr.c [2023-11-19 07:42:54,737 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:42:55,084 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:42:55,085 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9c0b84-4e37-457f-8a2f-c9f0d1ef985b/sv-benchmarks/c/weaver/popl20-more-max-array.wvr.c [2023-11-19 07:42:55,096 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9c0b84-4e37-457f-8a2f-c9f0d1ef985b/bin/uautomizer-verify-uCwYo4JHxu/data/32b23b5e2/e12be2824c7a46db832a8ee01e02684c/FLAGfa4b36c7d [2023-11-19 07:42:55,118 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9c0b84-4e37-457f-8a2f-c9f0d1ef985b/bin/uautomizer-verify-uCwYo4JHxu/data/32b23b5e2/e12be2824c7a46db832a8ee01e02684c [2023-11-19 07:42:55,126 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:42:55,129 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:42:55,134 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:42:55,134 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:42:55,141 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:42:55,144 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:42:55" (1/1) ... [2023-11-19 07:42:55,146 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76dbf773 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:42:55, skipping insertion in model container [2023-11-19 07:42:55,146 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:42:55" (1/1) ... [2023-11-19 07:42:55,180 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:42:55,357 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_5e9c0b84-4e37-457f-8a2f-c9f0d1ef985b/sv-benchmarks/c/weaver/popl20-more-max-array.wvr.c[2592,2605] [2023-11-19 07:42:55,370 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:42:55,383 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:42:55,410 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_5e9c0b84-4e37-457f-8a2f-c9f0d1ef985b/sv-benchmarks/c/weaver/popl20-more-max-array.wvr.c[2592,2605] [2023-11-19 07:42:55,414 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:42:55,423 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:42:55,423 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:42:55,432 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:42:55,432 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:42:55 WrapperNode [2023-11-19 07:42:55,433 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:42:55,434 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:42:55,434 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:42:55,434 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:42:55,442 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:42:55" (1/1) ... [2023-11-19 07:42:55,452 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:42:55" (1/1) ... [2023-11-19 07:42:55,482 INFO L138 Inliner]: procedures = 24, calls = 43, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 104 [2023-11-19 07:42:55,483 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:42:55,484 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:42:55,484 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:42:55,484 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:42:55,498 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:42:55" (1/1) ... [2023-11-19 07:42:55,499 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:42:55" (1/1) ... [2023-11-19 07:42:55,503 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:42:55" (1/1) ... [2023-11-19 07:42:55,504 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:42:55" (1/1) ... [2023-11-19 07:42:55,515 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:42:55" (1/1) ... [2023-11-19 07:42:55,520 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:42:55" (1/1) ... [2023-11-19 07:42:55,522 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:42:55" (1/1) ... [2023-11-19 07:42:55,524 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:42:55" (1/1) ... [2023-11-19 07:42:55,528 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:42:55,529 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:42:55,530 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:42:55,530 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:42:55,543 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:42:55" (1/1) ... [2023-11-19 07:42:55,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:42:55,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9c0b84-4e37-457f-8a2f-c9f0d1ef985b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:42:55,580 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9c0b84-4e37-457f-8a2f-c9f0d1ef985b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:42:55,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9c0b84-4e37-457f-8a2f-c9f0d1ef985b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:42:55,621 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:42:55,621 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-19 07:42:55,621 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-19 07:42:55,622 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-19 07:42:55,622 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-19 07:42:55,622 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-19 07:42:55,622 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-19 07:42:55,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:42:55,623 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:42:55,623 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:42:55,623 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-19 07:42:55,623 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-19 07:42:55,624 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 07:42:55,624 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:42:55,624 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:42:55,624 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:42:55,624 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:42:55,626 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-19 07:42:55,746 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:42:55,749 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:42:56,171 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:42:56,265 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:42:56,265 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-19 07:42:56,269 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:42:56 BoogieIcfgContainer [2023-11-19 07:42:56,270 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:42:56,273 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:42:56,273 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:42:56,277 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:42:56,277 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:42:55" (1/3) ... [2023-11-19 07:42:56,278 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36a463ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:42:56, skipping insertion in model container [2023-11-19 07:42:56,278 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:42:55" (2/3) ... [2023-11-19 07:42:56,279 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36a463ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:42:56, skipping insertion in model container [2023-11-19 07:42:56,279 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:42:56" (3/3) ... [2023-11-19 07:42:56,280 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-max-array.wvr.c [2023-11-19 07:42:56,290 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-19 07:42:56,302 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:42:56,302 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:42:56,302 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:42:56,416 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-19 07:42:56,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 157 places, 159 transitions, 339 flow [2023-11-19 07:42:56,565 INFO L124 PetriNetUnfolderBase]: 12/156 cut-off events. [2023-11-19 07:42:56,565 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-19 07:42:56,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169 conditions, 156 events. 12/156 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 102 event pairs, 0 based on Foata normal form. 0/143 useless extension candidates. Maximal degree in co-relation 116. Up to 2 conditions per place. [2023-11-19 07:42:56,573 INFO L82 GeneralOperation]: Start removeDead. Operand has 157 places, 159 transitions, 339 flow [2023-11-19 07:42:56,579 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 143 places, 145 transitions, 308 flow [2023-11-19 07:42:56,583 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:42:56,594 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 143 places, 145 transitions, 308 flow [2023-11-19 07:42:56,597 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 143 places, 145 transitions, 308 flow [2023-11-19 07:42:56,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 143 places, 145 transitions, 308 flow [2023-11-19 07:42:56,646 INFO L124 PetriNetUnfolderBase]: 12/145 cut-off events. [2023-11-19 07:42:56,647 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-19 07:42:56,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158 conditions, 145 events. 12/145 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 101 event pairs, 0 based on Foata normal form. 0/133 useless extension candidates. Maximal degree in co-relation 116. Up to 2 conditions per place. [2023-11-19 07:42:56,651 INFO L119 LiptonReduction]: Number of co-enabled transitions 1728 [2023-11-19 07:43:02,340 INFO L134 LiptonReduction]: Checked pairs total: 1847 [2023-11-19 07:43:02,340 INFO L136 LiptonReduction]: Total number of compositions: 146 [2023-11-19 07:43:02,356 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:43:02,363 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@f722da, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:43:02,363 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-19 07:43:02,371 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:43:02,371 INFO L124 PetriNetUnfolderBase]: 4/23 cut-off events. [2023-11-19 07:43:02,371 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-19 07:43:02,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:43:02,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:43:02,373 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)] === [2023-11-19 07:43:02,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:43:02,378 INFO L85 PathProgramCache]: Analyzing trace with hash -829075819, now seen corresponding path program 1 times [2023-11-19 07:43:02,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:43:02,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415218107] [2023-11-19 07:43:02,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:43:02,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:43:02,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:43:02,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:43:02,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:43:02,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415218107] [2023-11-19 07:43:02,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415218107] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:43:02,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:43:02,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:43:02,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762958351] [2023-11-19 07:43:02,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:43:02,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:43:02,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:43:02,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:43:02,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:43:02,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 305 [2023-11-19 07:43:02,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 24 transitions, 66 flow. Second operand has 3 states, 3 states have (on average 145.66666666666666) internal successors, (437), 3 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:02,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:43:02,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 305 [2023-11-19 07:43:02,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:43:03,073 INFO L124 PetriNetUnfolderBase]: 429/632 cut-off events. [2023-11-19 07:43:03,073 INFO L125 PetriNetUnfolderBase]: For 68/68 co-relation queries the response was YES. [2023-11-19 07:43:03,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1341 conditions, 632 events. 429/632 cut-off events. For 68/68 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2019 event pairs, 138 based on Foata normal form. 1/468 useless extension candidates. Maximal degree in co-relation 1030. Up to 389 conditions per place. [2023-11-19 07:43:03,082 INFO L140 encePairwiseOnDemand]: 300/305 looper letters, 38 selfloop transitions, 4 changer transitions 1/43 dead transitions. [2023-11-19 07:43:03,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 43 transitions, 205 flow [2023-11-19 07:43:03,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:43:03,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:43:03,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 461 transitions. [2023-11-19 07:43:03,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5038251366120219 [2023-11-19 07:43:03,103 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 461 transitions. [2023-11-19 07:43:03,103 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 461 transitions. [2023-11-19 07:43:03,106 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:43:03,109 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 461 transitions. [2023-11-19 07:43:03,114 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:03,120 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 305.0) internal successors, (1220), 4 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:03,122 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 305.0) internal successors, (1220), 4 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:03,124 INFO L175 Difference]: Start difference. First operand has 30 places, 24 transitions, 66 flow. Second operand 3 states and 461 transitions. [2023-11-19 07:43:03,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 43 transitions, 205 flow [2023-11-19 07:43:03,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 43 transitions, 183 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-19 07:43:03,132 INFO L231 Difference]: Finished difference. Result has 27 places, 27 transitions, 80 flow [2023-11-19 07:43:03,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=27, PETRI_TRANSITIONS=27} [2023-11-19 07:43:03,138 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, -3 predicate places. [2023-11-19 07:43:03,139 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 27 transitions, 80 flow [2023-11-19 07:43:03,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 145.66666666666666) internal successors, (437), 3 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:03,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:43:03,140 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] [2023-11-19 07:43:03,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:43:03,141 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)] === [2023-11-19 07:43:03,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:43:03,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1731679178, now seen corresponding path program 1 times [2023-11-19 07:43:03,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:43:03,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044236666] [2023-11-19 07:43:03,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:43:03,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:43:03,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:43:03,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:43:03,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:43:03,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044236666] [2023-11-19 07:43:03,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044236666] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:43:03,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:43:03,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:43:03,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587415683] [2023-11-19 07:43:03,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:43:03,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:43:03,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:43:03,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:43:03,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:43:03,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 305 [2023-11-19 07:43:03,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 27 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 141.0) internal successors, (423), 3 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:03,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:43:03,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 305 [2023-11-19 07:43:03,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:43:03,637 INFO L124 PetriNetUnfolderBase]: 429/633 cut-off events. [2023-11-19 07:43:03,638 INFO L125 PetriNetUnfolderBase]: For 130/130 co-relation queries the response was YES. [2023-11-19 07:43:03,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1541 conditions, 633 events. 429/633 cut-off events. For 130/130 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1875 event pairs, 276 based on Foata normal form. 0/632 useless extension candidates. Maximal degree in co-relation 544. Up to 633 conditions per place. [2023-11-19 07:43:03,645 INFO L140 encePairwiseOnDemand]: 302/305 looper letters, 26 selfloop transitions, 2 changer transitions 0/28 dead transitions. [2023-11-19 07:43:03,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 28 transitions, 138 flow [2023-11-19 07:43:03,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:43:03,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:43:03,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 428 transitions. [2023-11-19 07:43:03,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46775956284153003 [2023-11-19 07:43:03,653 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 428 transitions. [2023-11-19 07:43:03,654 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 428 transitions. [2023-11-19 07:43:03,657 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:43:03,658 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 428 transitions. [2023-11-19 07:43:03,660 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 142.66666666666666) internal successors, (428), 3 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:03,664 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 305.0) internal successors, (1220), 4 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:03,665 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 305.0) internal successors, (1220), 4 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:03,666 INFO L175 Difference]: Start difference. First operand has 27 places, 27 transitions, 80 flow. Second operand 3 states and 428 transitions. [2023-11-19 07:43:03,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 28 transitions, 138 flow [2023-11-19 07:43:03,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 28 transitions, 134 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:43:03,670 INFO L231 Difference]: Finished difference. Result has 29 places, 28 transitions, 88 flow [2023-11-19 07:43:03,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=29, PETRI_TRANSITIONS=28} [2023-11-19 07:43:03,676 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, -1 predicate places. [2023-11-19 07:43:03,676 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 28 transitions, 88 flow [2023-11-19 07:43:03,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 141.0) internal successors, (423), 3 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:03,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:43:03,677 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] [2023-11-19 07:43:03,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:43:03,678 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)] === [2023-11-19 07:43:03,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:43:03,682 INFO L85 PathProgramCache]: Analyzing trace with hash -226678984, now seen corresponding path program 1 times [2023-11-19 07:43:03,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:43:03,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484163257] [2023-11-19 07:43:03,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:43:03,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:43:03,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:43:03,850 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:43:03,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:43:03,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484163257] [2023-11-19 07:43:03,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484163257] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:43:03,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:43:03,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:43:03,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354740183] [2023-11-19 07:43:03,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:43:03,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:43:03,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:43:03,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:43:03,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:43:03,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 305 [2023-11-19 07:43:03,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 28 transitions, 88 flow. Second operand has 4 states, 4 states have (on average 137.5) internal successors, (550), 4 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:03,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:43:03,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 305 [2023-11-19 07:43:03,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:43:04,067 INFO L124 PetriNetUnfolderBase]: 424/625 cut-off events. [2023-11-19 07:43:04,068 INFO L125 PetriNetUnfolderBase]: For 112/112 co-relation queries the response was YES. [2023-11-19 07:43:04,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1473 conditions, 625 events. 424/625 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1868 event pairs, 186 based on Foata normal form. 50/674 useless extension candidates. Maximal degree in co-relation 1460. Up to 459 conditions per place. [2023-11-19 07:43:04,074 INFO L140 encePairwiseOnDemand]: 301/305 looper letters, 38 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2023-11-19 07:43:04,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 42 transitions, 212 flow [2023-11-19 07:43:04,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:43:04,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:43:04,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 565 transitions. [2023-11-19 07:43:04,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46311475409836067 [2023-11-19 07:43:04,078 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 565 transitions. [2023-11-19 07:43:04,078 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 565 transitions. [2023-11-19 07:43:04,079 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:43:04,079 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 565 transitions. [2023-11-19 07:43:04,081 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 141.25) internal successors, (565), 4 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:04,084 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 305.0) internal successors, (1525), 5 states have internal predecessors, (1525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:04,086 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 305.0) internal successors, (1525), 5 states have internal predecessors, (1525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:04,086 INFO L175 Difference]: Start difference. First operand has 29 places, 28 transitions, 88 flow. Second operand 4 states and 565 transitions. [2023-11-19 07:43:04,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 42 transitions, 212 flow [2023-11-19 07:43:04,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 42 transitions, 206 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-11-19 07:43:04,089 INFO L231 Difference]: Finished difference. Result has 32 places, 29 transitions, 101 flow [2023-11-19 07:43:04,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=101, PETRI_PLACES=32, PETRI_TRANSITIONS=29} [2023-11-19 07:43:04,092 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 2 predicate places. [2023-11-19 07:43:04,096 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 29 transitions, 101 flow [2023-11-19 07:43:04,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 137.5) internal successors, (550), 4 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:04,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:43:04,097 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] [2023-11-19 07:43:04,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 07:43:04,098 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)] === [2023-11-19 07:43:04,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:43:04,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1057524325, now seen corresponding path program 1 times [2023-11-19 07:43:04,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:43:04,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904268] [2023-11-19 07:43:04,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:43:04,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:43:04,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:43:04,265 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:43:04,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:43:04,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904268] [2023-11-19 07:43:04,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904268] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:43:04,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56997773] [2023-11-19 07:43:04,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:43:04,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:43:04,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9c0b84-4e37-457f-8a2f-c9f0d1ef985b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:43:04,271 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9c0b84-4e37-457f-8a2f-c9f0d1ef985b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:43:04,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9c0b84-4e37-457f-8a2f-c9f0d1ef985b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:43:04,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:43:04,402 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:43:04,408 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:43:04,488 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:43:04,489 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:43:04,533 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:43:04,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56997773] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 07:43:04,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:43:04,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-11-19 07:43:04,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089605898] [2023-11-19 07:43:04,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:43:04,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:43:04,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:43:04,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:43:04,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-19 07:43:04,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 305 [2023-11-19 07:43:04,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 29 transitions, 101 flow. Second operand has 5 states, 5 states have (on average 130.4) internal successors, (652), 5 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:04,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:43:04,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 305 [2023-11-19 07:43:04,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:43:04,796 INFO L124 PetriNetUnfolderBase]: 410/599 cut-off events. [2023-11-19 07:43:04,796 INFO L125 PetriNetUnfolderBase]: For 292/292 co-relation queries the response was YES. [2023-11-19 07:43:04,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1622 conditions, 599 events. 410/599 cut-off events. For 292/292 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1799 event pairs, 183 based on Foata normal form. 44/643 useless extension candidates. Maximal degree in co-relation 1603. Up to 452 conditions per place. [2023-11-19 07:43:04,802 INFO L140 encePairwiseOnDemand]: 300/305 looper letters, 39 selfloop transitions, 5 changer transitions 0/44 dead transitions. [2023-11-19 07:43:04,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 44 transitions, 246 flow [2023-11-19 07:43:04,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:43:04,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:43:04,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 668 transitions. [2023-11-19 07:43:04,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4380327868852459 [2023-11-19 07:43:04,806 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 668 transitions. [2023-11-19 07:43:04,806 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 668 transitions. [2023-11-19 07:43:04,807 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:43:04,807 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 668 transitions. [2023-11-19 07:43:04,809 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 133.6) internal successors, (668), 5 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:04,813 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 305.0) internal successors, (1830), 6 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:04,815 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 305.0) internal successors, (1830), 6 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:04,816 INFO L175 Difference]: Start difference. First operand has 32 places, 29 transitions, 101 flow. Second operand 5 states and 668 transitions. [2023-11-19 07:43:04,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 44 transitions, 246 flow [2023-11-19 07:43:04,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 44 transitions, 230 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-11-19 07:43:04,819 INFO L231 Difference]: Finished difference. Result has 35 places, 30 transitions, 113 flow [2023-11-19 07:43:04,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=113, PETRI_PLACES=35, PETRI_TRANSITIONS=30} [2023-11-19 07:43:04,821 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 5 predicate places. [2023-11-19 07:43:04,821 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 30 transitions, 113 flow [2023-11-19 07:43:04,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 130.4) internal successors, (652), 5 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:04,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:43:04,822 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] [2023-11-19 07:43:04,849 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9c0b84-4e37-457f-8a2f-c9f0d1ef985b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:43:05,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9c0b84-4e37-457f-8a2f-c9f0d1ef985b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:43:05,043 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)] === [2023-11-19 07:43:05,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:43:05,044 INFO L85 PathProgramCache]: Analyzing trace with hash -366924251, now seen corresponding path program 1 times [2023-11-19 07:43:05,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:43:05,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296148793] [2023-11-19 07:43:05,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:43:05,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:43:05,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:43:06,132 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:43:06,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:43:06,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296148793] [2023-11-19 07:43:06,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296148793] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:43:06,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314526212] [2023-11-19 07:43:06,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:43:06,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:43:06,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9c0b84-4e37-457f-8a2f-c9f0d1ef985b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:43:06,135 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9c0b84-4e37-457f-8a2f-c9f0d1ef985b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:43:06,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9c0b84-4e37-457f-8a2f-c9f0d1ef985b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:43:06,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:43:06,252 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-19 07:43:06,256 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:43:06,359 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 1 [2023-11-19 07:43:06,441 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 8 treesize of output 1 [2023-11-19 07:43:06,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:43:06,656 INFO L378 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 36 treesize of output 27 [2023-11-19 07:43:06,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:43:06,861 INFO L378 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 36 treesize of output 27 [2023-11-19 07:43:07,044 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 30 [2023-11-19 07:43:07,147 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:43:07,148 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:43:07,376 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 (+ c_~A~0.offset (* 4 c_~M~0)))) (and (forall ((v_ArrVal_113 (Array Int Int))) (let ((.cse0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_113) c_~A~0.base) .cse1))) (or (< .cse0 (+ c_~max2~0 1)) (= c_~max1~0 .cse0)))) (or (forall ((v_ArrVal_113 (Array Int Int))) (< c_~max2~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_113) c_~A~0.base) .cse1))) (= c_~max1~0 c_~max2~0)))) is different from false [2023-11-19 07:43:07,664 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse3 (+ c_~A~0.offset (* 4 c_~M~0)))) (let ((.cse2 (+ c_~max2~0 1)) (.cse4 (select (select |c_#memory_int| c_~A~0.base) (+ c_~A~0.offset (* c_thread1Thread1of1ForFork1_~i~0 4)))) (.cse0 (forall ((v_ArrVal_113 (Array Int Int)) (v_ArrVal_112 (Array Int Int))) (< c_~max2~0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_112) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_113) c_~A~0.base) .cse3))))) (and (or (and (or (= c_~max1~0 c_~max2~0) .cse0) (forall ((v_ArrVal_113 (Array Int Int)) (v_ArrVal_112 (Array Int Int))) (let ((.cse1 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_112) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_113) c_~A~0.base) .cse3))) (or (< .cse1 .cse2) (= c_~max1~0 .cse1))))) (< c_~max1~0 .cse4)) (or (< .cse4 (+ c_~max1~0 1)) (and (forall ((v_ArrVal_113 (Array Int Int)) (v_ArrVal_112 (Array Int Int))) (let ((.cse5 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_112) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_113) c_~A~0.base) .cse3))) (or (= .cse4 .cse5) (< .cse5 .cse2)))) (or (= .cse4 c_~max2~0) .cse0)))))) is different from false [2023-11-19 07:43:07,745 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse3 (+ c_~A~0.offset (* 4 c_~M~0)))) (let ((.cse4 (forall ((v_ArrVal_113 (Array Int Int)) (v_ArrVal_112 (Array Int Int))) (< c_~max2~0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_112) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_113) c_~A~0.base) .cse3)))) (.cse2 (+ c_~max2~0 1)) (.cse0 (select (select |c_#memory_int| c_~A~0.base) c_~A~0.offset))) (and (or (and (forall ((v_ArrVal_113 (Array Int Int)) (v_ArrVal_112 (Array Int Int))) (let ((.cse1 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_112) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_113) c_~A~0.base) .cse3))) (or (= .cse0 .cse1) (< .cse1 .cse2)))) (or (= .cse0 c_~max2~0) .cse4)) (< .cse0 (+ c_~max1~0 1))) (or (and (or (= c_~max1~0 c_~max2~0) .cse4) (forall ((v_ArrVal_113 (Array Int Int)) (v_ArrVal_112 (Array Int Int))) (let ((.cse5 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_112) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_113) c_~A~0.base) .cse3))) (or (< .cse5 .cse2) (= c_~max1~0 .cse5))))) (< c_~max1~0 .cse0))))) is different from false [2023-11-19 07:43:08,521 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:43:08,522 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 65 [2023-11-19 07:43:08,546 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:43:08,546 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 324 treesize of output 312 [2023-11-19 07:43:08,588 INFO L378 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 271 treesize of output 223 [2023-11-19 07:43:08,612 INFO L378 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 223 treesize of output 199 [2023-11-19 07:43:08,645 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:43:08,646 INFO L378 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 116 treesize of output 110 [2023-11-19 07:43:09,560 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:43:09,560 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 43 [2023-11-19 07:43:09,568 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 07:43:09,568 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 07:43:09,578 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-19 07:43:09,578 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 43 [2023-11-19 07:43:09,624 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-19 07:43:09,625 INFO L378 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 27 treesize of output 23 [2023-11-19 07:43:09,654 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-19 07:43:09,655 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 1 [2023-11-19 07:43:09,668 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-19 07:43:09,668 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 1 [2023-11-19 07:43:09,736 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-11-19 07:43:09,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314526212] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:43:09,737 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:43:09,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 24 [2023-11-19 07:43:09,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340020416] [2023-11-19 07:43:09,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:43:09,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-19 07:43:09,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:43:09,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-19 07:43:09,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=411, Unknown=10, NotChecked=132, Total=650 [2023-11-19 07:43:10,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 305 [2023-11-19 07:43:10,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 30 transitions, 113 flow. Second operand has 26 states, 26 states have (on average 84.26923076923077) internal successors, (2191), 26 states have internal predecessors, (2191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:10,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:43:10,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 305 [2023-11-19 07:43:10,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:43:11,377 INFO L124 PetriNetUnfolderBase]: 747/1095 cut-off events. [2023-11-19 07:43:11,378 INFO L125 PetriNetUnfolderBase]: For 570/570 co-relation queries the response was YES. [2023-11-19 07:43:11,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3135 conditions, 1095 events. 747/1095 cut-off events. For 570/570 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3965 event pairs, 58 based on Foata normal form. 1/1094 useless extension candidates. Maximal degree in co-relation 2725. Up to 647 conditions per place. [2023-11-19 07:43:11,388 INFO L140 encePairwiseOnDemand]: 296/305 looper letters, 80 selfloop transitions, 23 changer transitions 1/104 dead transitions. [2023-11-19 07:43:11,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 104 transitions, 550 flow [2023-11-19 07:43:11,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-19 07:43:11,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-19 07:43:11,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 923 transitions. [2023-11-19 07:43:11,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3026229508196721 [2023-11-19 07:43:11,393 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 923 transitions. [2023-11-19 07:43:11,394 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 923 transitions. [2023-11-19 07:43:11,394 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:43:11,395 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 923 transitions. [2023-11-19 07:43:11,398 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 92.3) internal successors, (923), 10 states have internal predecessors, (923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:11,404 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 305.0) internal successors, (3355), 11 states have internal predecessors, (3355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:11,405 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 305.0) internal successors, (3355), 11 states have internal predecessors, (3355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:11,405 INFO L175 Difference]: Start difference. First operand has 35 places, 30 transitions, 113 flow. Second operand 10 states and 923 transitions. [2023-11-19 07:43:11,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 104 transitions, 550 flow [2023-11-19 07:43:11,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 104 transitions, 534 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-11-19 07:43:11,410 INFO L231 Difference]: Finished difference. Result has 45 places, 48 transitions, 262 flow [2023-11-19 07:43:11,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=262, PETRI_PLACES=45, PETRI_TRANSITIONS=48} [2023-11-19 07:43:11,411 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 15 predicate places. [2023-11-19 07:43:11,412 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 48 transitions, 262 flow [2023-11-19 07:43:11,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 84.26923076923077) internal successors, (2191), 26 states have internal predecessors, (2191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:11,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:43:11,413 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] [2023-11-19 07:43:11,436 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9c0b84-4e37-457f-8a2f-c9f0d1ef985b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:43:11,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9c0b84-4e37-457f-8a2f-c9f0d1ef985b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:43:11,634 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)] === [2023-11-19 07:43:11,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:43:11,635 INFO L85 PathProgramCache]: Analyzing trace with hash -824596411, now seen corresponding path program 2 times [2023-11-19 07:43:11,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:43:11,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257447915] [2023-11-19 07:43:11,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:43:11,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:43:11,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:43:12,456 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:43:12,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:43:12,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257447915] [2023-11-19 07:43:12,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257447915] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:43:12,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547496526] [2023-11-19 07:43:12,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:43:12,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:43:12,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9c0b84-4e37-457f-8a2f-c9f0d1ef985b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:43:12,459 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9c0b84-4e37-457f-8a2f-c9f0d1ef985b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:43:12,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9c0b84-4e37-457f-8a2f-c9f0d1ef985b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:43:12,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:43:12,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:43:12,589 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-19 07:43:12,592 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:43:12,960 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 31 [2023-11-19 07:43:13,004 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:43:13,004 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:43:13,144 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:43:13,144 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 49 [2023-11-19 07:43:13,378 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:43:13,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547496526] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:43:13,379 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:43:13,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-11-19 07:43:13,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857685363] [2023-11-19 07:43:13,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:43:13,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-19 07:43:13,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:43:13,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-19 07:43:13,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2023-11-19 07:43:14,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 305 [2023-11-19 07:43:14,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 48 transitions, 262 flow. Second operand has 21 states, 21 states have (on average 114.0952380952381) internal successors, (2396), 21 states have internal predecessors, (2396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:14,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:43:14,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 305 [2023-11-19 07:43:14,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:43:15,181 INFO L124 PetriNetUnfolderBase]: 894/1309 cut-off events. [2023-11-19 07:43:15,181 INFO L125 PetriNetUnfolderBase]: For 1437/1437 co-relation queries the response was YES. [2023-11-19 07:43:15,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4382 conditions, 1309 events. 894/1309 cut-off events. For 1437/1437 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 4776 event pairs, 150 based on Foata normal form. 1/1309 useless extension candidates. Maximal degree in co-relation 3926. Up to 984 conditions per place. [2023-11-19 07:43:15,195 INFO L140 encePairwiseOnDemand]: 296/305 looper letters, 73 selfloop transitions, 26 changer transitions 1/100 dead transitions. [2023-11-19 07:43:15,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 100 transitions, 659 flow [2023-11-19 07:43:15,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 07:43:15,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-19 07:43:15,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1082 transitions. [2023-11-19 07:43:15,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3941712204007286 [2023-11-19 07:43:15,201 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1082 transitions. [2023-11-19 07:43:15,201 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1082 transitions. [2023-11-19 07:43:15,202 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:43:15,203 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1082 transitions. [2023-11-19 07:43:15,208 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 120.22222222222223) internal successors, (1082), 9 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:15,214 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 305.0) internal successors, (3050), 10 states have internal predecessors, (3050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:15,215 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 305.0) internal successors, (3050), 10 states have internal predecessors, (3050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:15,215 INFO L175 Difference]: Start difference. First operand has 45 places, 48 transitions, 262 flow. Second operand 9 states and 1082 transitions. [2023-11-19 07:43:15,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 100 transitions, 659 flow [2023-11-19 07:43:15,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 100 transitions, 612 flow, removed 15 selfloop flow, removed 2 redundant places. [2023-11-19 07:43:15,225 INFO L231 Difference]: Finished difference. Result has 55 places, 62 transitions, 406 flow [2023-11-19 07:43:15,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=227, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=406, PETRI_PLACES=55, PETRI_TRANSITIONS=62} [2023-11-19 07:43:15,228 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 25 predicate places. [2023-11-19 07:43:15,228 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 62 transitions, 406 flow [2023-11-19 07:43:15,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 114.0952380952381) internal successors, (2396), 21 states have internal predecessors, (2396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:15,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:43:15,231 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] [2023-11-19 07:43:15,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9c0b84-4e37-457f-8a2f-c9f0d1ef985b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:43:15,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9c0b84-4e37-457f-8a2f-c9f0d1ef985b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-19 07:43:15,444 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)] === [2023-11-19 07:43:15,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:43:15,444 INFO L85 PathProgramCache]: Analyzing trace with hash -914608595, now seen corresponding path program 3 times [2023-11-19 07:43:15,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:43:15,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728772199] [2023-11-19 07:43:15,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:43:15,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:43:15,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:43:16,044 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:43:16,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:43:16,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728772199] [2023-11-19 07:43:16,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728772199] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:43:16,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993113972] [2023-11-19 07:43:16,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 07:43:16,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:43:16,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9c0b84-4e37-457f-8a2f-c9f0d1ef985b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:43:16,047 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9c0b84-4e37-457f-8a2f-c9f0d1ef985b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:43:16,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9c0b84-4e37-457f-8a2f-c9f0d1ef985b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:43:16,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-19 07:43:16,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:43:16,191 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-19 07:43:16,193 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:43:16,471 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 30 [2023-11-19 07:43:16,554 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:43:16,554 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:43:16,643 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:43:16,643 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 49 [2023-11-19 07:43:16,874 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:43:16,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993113972] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:43:16,875 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:43:16,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-11-19 07:43:16,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111089765] [2023-11-19 07:43:16,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:43:16,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-19 07:43:16,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:43:16,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-19 07:43:16,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2023-11-19 07:43:17,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 305 [2023-11-19 07:43:17,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 62 transitions, 406 flow. Second operand has 20 states, 20 states have (on average 114.0) internal successors, (2280), 20 states have internal predecessors, (2280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:17,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:43:17,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 305 [2023-11-19 07:43:17,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:43:18,734 INFO L124 PetriNetUnfolderBase]: 1012/1480 cut-off events. [2023-11-19 07:43:18,734 INFO L125 PetriNetUnfolderBase]: For 2321/2321 co-relation queries the response was YES. [2023-11-19 07:43:18,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5415 conditions, 1480 events. 1012/1480 cut-off events. For 2321/2321 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 5517 event pairs, 180 based on Foata normal form. 1/1480 useless extension candidates. Maximal degree in co-relation 4864. Up to 1175 conditions per place. [2023-11-19 07:43:18,751 INFO L140 encePairwiseOnDemand]: 296/305 looper letters, 79 selfloop transitions, 27 changer transitions 1/107 dead transitions. [2023-11-19 07:43:18,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 107 transitions, 782 flow [2023-11-19 07:43:18,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 07:43:18,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-19 07:43:18,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1082 transitions. [2023-11-19 07:43:18,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3941712204007286 [2023-11-19 07:43:18,758 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1082 transitions. [2023-11-19 07:43:18,758 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1082 transitions. [2023-11-19 07:43:18,759 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:43:18,759 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1082 transitions. [2023-11-19 07:43:18,763 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 120.22222222222223) internal successors, (1082), 9 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:18,769 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 305.0) internal successors, (3050), 10 states have internal predecessors, (3050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:18,771 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 305.0) internal successors, (3050), 10 states have internal predecessors, (3050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:18,771 INFO L175 Difference]: Start difference. First operand has 55 places, 62 transitions, 406 flow. Second operand 9 states and 1082 transitions. [2023-11-19 07:43:18,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 107 transitions, 782 flow [2023-11-19 07:43:18,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 107 transitions, 752 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-11-19 07:43:18,786 INFO L231 Difference]: Finished difference. Result has 63 places, 69 transitions, 522 flow [2023-11-19 07:43:18,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=378, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=522, PETRI_PLACES=63, PETRI_TRANSITIONS=69} [2023-11-19 07:43:18,788 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 33 predicate places. [2023-11-19 07:43:18,788 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 69 transitions, 522 flow [2023-11-19 07:43:18,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 114.0) internal successors, (2280), 20 states have internal predecessors, (2280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:18,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:43:18,790 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] [2023-11-19 07:43:18,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9c0b84-4e37-457f-8a2f-c9f0d1ef985b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:43:19,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9c0b84-4e37-457f-8a2f-c9f0d1ef985b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-19 07:43:19,003 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)] === [2023-11-19 07:43:19,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:43:19,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1712406779, now seen corresponding path program 4 times [2023-11-19 07:43:19,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:43:19,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753039859] [2023-11-19 07:43:19,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:43:19,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:43:19,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:43:19,711 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:43:19,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:43:19,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753039859] [2023-11-19 07:43:19,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753039859] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:43:19,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241586755] [2023-11-19 07:43:19,712 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 07:43:19,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:43:19,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9c0b84-4e37-457f-8a2f-c9f0d1ef985b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:43:19,714 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9c0b84-4e37-457f-8a2f-c9f0d1ef985b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:43:19,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9c0b84-4e37-457f-8a2f-c9f0d1ef985b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:43:19,843 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 07:43:19,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:43:19,845 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-19 07:43:19,848 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:43:20,153 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 31 [2023-11-19 07:43:20,263 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:43:20,263 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:43:20,374 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:43:20,374 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 49 [2023-11-19 07:43:20,593 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:43:20,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241586755] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:43:20,594 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:43:20,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-11-19 07:43:20,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056679978] [2023-11-19 07:43:20,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:43:20,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-19 07:43:20,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:43:20,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-19 07:43:20,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2023-11-19 07:43:21,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 305 [2023-11-19 07:43:21,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 69 transitions, 522 flow. Second operand has 21 states, 21 states have (on average 113.9047619047619) internal successors, (2392), 21 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:21,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:43:21,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 305 [2023-11-19 07:43:21,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:43:22,610 INFO L124 PetriNetUnfolderBase]: 1130/1651 cut-off events. [2023-11-19 07:43:22,610 INFO L125 PetriNetUnfolderBase]: For 3726/3726 co-relation queries the response was YES. [2023-11-19 07:43:22,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6379 conditions, 1651 events. 1130/1651 cut-off events. For 3726/3726 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 6346 event pairs, 186 based on Foata normal form. 1/1651 useless extension candidates. Maximal degree in co-relation 5781. Up to 1287 conditions per place. [2023-11-19 07:43:22,628 INFO L140 encePairwiseOnDemand]: 295/305 looper letters, 90 selfloop transitions, 32 changer transitions 1/123 dead transitions. [2023-11-19 07:43:22,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 123 transitions, 965 flow [2023-11-19 07:43:22,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-19 07:43:22,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-19 07:43:22,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1204 transitions. [2023-11-19 07:43:22,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3947540983606557 [2023-11-19 07:43:22,634 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1204 transitions. [2023-11-19 07:43:22,634 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1204 transitions. [2023-11-19 07:43:22,635 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:43:22,635 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1204 transitions. [2023-11-19 07:43:22,638 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 120.4) internal successors, (1204), 10 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:22,644 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 305.0) internal successors, (3355), 11 states have internal predecessors, (3355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:22,646 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 305.0) internal successors, (3355), 11 states have internal predecessors, (3355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:22,646 INFO L175 Difference]: Start difference. First operand has 63 places, 69 transitions, 522 flow. Second operand 10 states and 1204 transitions. [2023-11-19 07:43:22,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 123 transitions, 965 flow [2023-11-19 07:43:22,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 123 transitions, 920 flow, removed 12 selfloop flow, removed 4 redundant places. [2023-11-19 07:43:22,666 INFO L231 Difference]: Finished difference. Result has 71 places, 78 transitions, 659 flow [2023-11-19 07:43:22,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=485, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=659, PETRI_PLACES=71, PETRI_TRANSITIONS=78} [2023-11-19 07:43:22,671 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 41 predicate places. [2023-11-19 07:43:22,671 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 78 transitions, 659 flow [2023-11-19 07:43:22,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 113.9047619047619) internal successors, (2392), 21 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:22,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:43:22,673 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] [2023-11-19 07:43:22,698 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9c0b84-4e37-457f-8a2f-c9f0d1ef985b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 07:43:22,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9c0b84-4e37-457f-8a2f-c9f0d1ef985b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:43:22,887 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)] === [2023-11-19 07:43:22,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:43:22,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1739635997, now seen corresponding path program 5 times [2023-11-19 07:43:22,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:43:22,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417432645] [2023-11-19 07:43:22,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:43:22,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:43:22,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:43:23,430 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:43:23,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:43:23,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417432645] [2023-11-19 07:43:23,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417432645] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:43:23,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305617183] [2023-11-19 07:43:23,434 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-19 07:43:23,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:43:23,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9c0b84-4e37-457f-8a2f-c9f0d1ef985b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:43:23,435 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9c0b84-4e37-457f-8a2f-c9f0d1ef985b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:43:23,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9c0b84-4e37-457f-8a2f-c9f0d1ef985b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 07:43:23,558 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-19 07:43:23,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:43:23,560 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-19 07:43:23,564 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:43:23,969 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:43:23,970 INFO L378 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 77 treesize of output 71 [2023-11-19 07:43:24,309 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:43:24,309 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:43:24,519 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:43:24,520 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 49 [2023-11-19 07:43:24,820 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:43:24,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305617183] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:43:24,821 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:43:24,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 19 [2023-11-19 07:43:24,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745424903] [2023-11-19 07:43:24,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:43:24,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-19 07:43:24,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:43:24,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-19 07:43:24,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2023-11-19 07:43:26,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 305 [2023-11-19 07:43:26,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 78 transitions, 659 flow. Second operand has 21 states, 21 states have (on average 114.95238095238095) internal successors, (2414), 21 states have internal predecessors, (2414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:26,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:43:26,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 305 [2023-11-19 07:43:26,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:43:29,173 INFO L124 PetriNetUnfolderBase]: 1724/2501 cut-off events. [2023-11-19 07:43:29,173 INFO L125 PetriNetUnfolderBase]: For 7507/7507 co-relation queries the response was YES. [2023-11-19 07:43:29,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10745 conditions, 2501 events. 1724/2501 cut-off events. For 7507/7507 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 10394 event pairs, 150 based on Foata normal form. 2/2502 useless extension candidates. Maximal degree in co-relation 9616. Up to 1551 conditions per place. [2023-11-19 07:43:29,210 INFO L140 encePairwiseOnDemand]: 294/305 looper letters, 179 selfloop transitions, 117 changer transitions 5/301 dead transitions. [2023-11-19 07:43:29,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 301 transitions, 2462 flow [2023-11-19 07:43:29,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-19 07:43:29,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-11-19 07:43:29,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 4180 transitions. [2023-11-19 07:43:29,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3915690866510539 [2023-11-19 07:43:29,237 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 4180 transitions. [2023-11-19 07:43:29,237 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 4180 transitions. [2023-11-19 07:43:29,243 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:43:29,243 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 4180 transitions. [2023-11-19 07:43:29,266 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 119.42857142857143) internal successors, (4180), 35 states have internal predecessors, (4180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:29,293 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 305.0) internal successors, (10980), 36 states have internal predecessors, (10980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:29,297 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 305.0) internal successors, (10980), 36 states have internal predecessors, (10980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:29,297 INFO L175 Difference]: Start difference. First operand has 71 places, 78 transitions, 659 flow. Second operand 35 states and 4180 transitions. [2023-11-19 07:43:29,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 301 transitions, 2462 flow [2023-11-19 07:43:29,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 301 transitions, 2388 flow, removed 10 selfloop flow, removed 6 redundant places. [2023-11-19 07:43:29,337 INFO L231 Difference]: Finished difference. Result has 101 places, 169 transitions, 1753 flow [2023-11-19 07:43:29,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=598, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=1753, PETRI_PLACES=101, PETRI_TRANSITIONS=169} [2023-11-19 07:43:29,338 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 71 predicate places. [2023-11-19 07:43:29,338 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 169 transitions, 1753 flow [2023-11-19 07:43:29,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 114.95238095238095) internal successors, (2414), 21 states have internal predecessors, (2414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:29,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:43:29,340 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] [2023-11-19 07:43:29,360 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9c0b84-4e37-457f-8a2f-c9f0d1ef985b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 07:43:29,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9c0b84-4e37-457f-8a2f-c9f0d1ef985b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:43:29,553 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)] === [2023-11-19 07:43:29,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:43:29,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1156017093, now seen corresponding path program 6 times [2023-11-19 07:43:29,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:43:29,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330963169] [2023-11-19 07:43:29,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:43:29,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:43:29,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:43:30,077 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:43:30,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:43:30,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330963169] [2023-11-19 07:43:30,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330963169] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:43:30,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605568796] [2023-11-19 07:43:30,078 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-19 07:43:30,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:43:30,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9c0b84-4e37-457f-8a2f-c9f0d1ef985b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:43:30,084 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9c0b84-4e37-457f-8a2f-c9f0d1ef985b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:43:30,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9c0b84-4e37-457f-8a2f-c9f0d1ef985b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 07:43:30,232 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-19 07:43:30,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:43:30,234 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-19 07:43:30,236 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:43:30,482 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 30 [2023-11-19 07:43:30,560 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:43:30,560 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:43:30,652 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:43:30,652 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 49 [2023-11-19 07:43:30,843 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:43:30,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605568796] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:43:30,844 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:43:30,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-11-19 07:43:30,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877399583] [2023-11-19 07:43:30,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:43:30,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-19 07:43:30,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:43:30,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-19 07:43:30,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2023-11-19 07:43:31,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 305 [2023-11-19 07:43:31,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 169 transitions, 1753 flow. Second operand has 20 states, 20 states have (on average 114.0) internal successors, (2280), 20 states have internal predecessors, (2280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:31,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:43:31,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 305 [2023-11-19 07:43:31,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:43:32,722 INFO L124 PetriNetUnfolderBase]: 2048/2972 cut-off events. [2023-11-19 07:43:32,722 INFO L125 PetriNetUnfolderBase]: For 11811/11811 co-relation queries the response was YES. [2023-11-19 07:43:32,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14031 conditions, 2972 events. 2048/2972 cut-off events. For 11811/11811 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 12805 event pairs, 258 based on Foata normal form. 2/2974 useless extension candidates. Maximal degree in co-relation 13796. Up to 2382 conditions per place. [2023-11-19 07:43:32,767 INFO L140 encePairwiseOnDemand]: 295/305 looper letters, 190 selfloop transitions, 68 changer transitions 4/262 dead transitions. [2023-11-19 07:43:32,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 262 transitions, 2855 flow [2023-11-19 07:43:32,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-19 07:43:32,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-19 07:43:32,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1797 transitions. [2023-11-19 07:43:32,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39278688524590166 [2023-11-19 07:43:32,778 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1797 transitions. [2023-11-19 07:43:32,778 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1797 transitions. [2023-11-19 07:43:32,781 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:43:32,781 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1797 transitions. [2023-11-19 07:43:32,788 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 119.8) internal successors, (1797), 15 states have internal predecessors, (1797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:32,796 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 305.0) internal successors, (4880), 16 states have internal predecessors, (4880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:32,798 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 305.0) internal successors, (4880), 16 states have internal predecessors, (4880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:32,798 INFO L175 Difference]: Start difference. First operand has 101 places, 169 transitions, 1753 flow. Second operand 15 states and 1797 transitions. [2023-11-19 07:43:32,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 262 transitions, 2855 flow [2023-11-19 07:43:32,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 262 transitions, 2003 flow, removed 387 selfloop flow, removed 12 redundant places. [2023-11-19 07:43:32,921 INFO L231 Difference]: Finished difference. Result has 108 places, 197 transitions, 1530 flow [2023-11-19 07:43:32,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=1067, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1530, PETRI_PLACES=108, PETRI_TRANSITIONS=197} [2023-11-19 07:43:32,922 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 78 predicate places. [2023-11-19 07:43:32,923 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 197 transitions, 1530 flow [2023-11-19 07:43:32,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 114.0) internal successors, (2280), 20 states have internal predecessors, (2280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:32,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:43:32,924 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:43:32,949 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9c0b84-4e37-457f-8a2f-c9f0d1ef985b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 07:43:33,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9c0b84-4e37-457f-8a2f-c9f0d1ef985b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-19 07:43:33,139 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)] === [2023-11-19 07:43:33,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:43:33,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1790511525, now seen corresponding path program 7 times [2023-11-19 07:43:33,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:43:33,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722730544] [2023-11-19 07:43:33,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:43:33,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:43:33,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:43:33,270 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:43:33,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:43:33,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722730544] [2023-11-19 07:43:33,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722730544] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:43:33,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492970260] [2023-11-19 07:43:33,271 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-19 07:43:33,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:43:33,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9c0b84-4e37-457f-8a2f-c9f0d1ef985b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:43:33,273 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9c0b84-4e37-457f-8a2f-c9f0d1ef985b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:43:33,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9c0b84-4e37-457f-8a2f-c9f0d1ef985b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 07:43:33,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:43:33,390 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 07:43:33,392 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:43:33,481 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:43:33,481 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:43:33,552 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:43:33,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492970260] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:43:33,552 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:43:33,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-11-19 07:43:33,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580856367] [2023-11-19 07:43:33,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:43:33,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-19 07:43:33,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:43:33,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-19 07:43:33,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2023-11-19 07:43:33,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 305 [2023-11-19 07:43:33,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 197 transitions, 1530 flow. Second operand has 14 states, 14 states have (on average 129.5) internal successors, (1813), 14 states have internal predecessors, (1813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:33,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:43:33,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 305 [2023-11-19 07:43:33,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:43:34,512 INFO L124 PetriNetUnfolderBase]: 2494/3704 cut-off events. [2023-11-19 07:43:34,512 INFO L125 PetriNetUnfolderBase]: For 13068/13068 co-relation queries the response was YES. [2023-11-19 07:43:34,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14690 conditions, 3704 events. 2494/3704 cut-off events. For 13068/13068 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 17595 event pairs, 844 based on Foata normal form. 170/3874 useless extension candidates. Maximal degree in co-relation 14365. Up to 1379 conditions per place. [2023-11-19 07:43:34,587 INFO L140 encePairwiseOnDemand]: 299/305 looper letters, 258 selfloop transitions, 40 changer transitions 0/298 dead transitions. [2023-11-19 07:43:34,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 298 transitions, 2767 flow [2023-11-19 07:43:34,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 07:43:34,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-19 07:43:34,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 953 transitions. [2023-11-19 07:43:34,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44637002341920373 [2023-11-19 07:43:34,591 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 953 transitions. [2023-11-19 07:43:34,592 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 953 transitions. [2023-11-19 07:43:34,592 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:43:34,593 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 953 transitions. [2023-11-19 07:43:34,595 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 136.14285714285714) internal successors, (953), 7 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:34,600 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 305.0) internal successors, (2440), 8 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:34,601 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 305.0) internal successors, (2440), 8 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:34,601 INFO L175 Difference]: Start difference. First operand has 108 places, 197 transitions, 1530 flow. Second operand 7 states and 953 transitions. [2023-11-19 07:43:34,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 298 transitions, 2767 flow [2023-11-19 07:43:34,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 298 transitions, 2604 flow, removed 57 selfloop flow, removed 8 redundant places. [2023-11-19 07:43:34,669 INFO L231 Difference]: Finished difference. Result has 109 places, 198 transitions, 1539 flow [2023-11-19 07:43:34,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=1258, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1539, PETRI_PLACES=109, PETRI_TRANSITIONS=198} [2023-11-19 07:43:34,671 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 79 predicate places. [2023-11-19 07:43:34,671 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 198 transitions, 1539 flow [2023-11-19 07:43:34,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 129.5) internal successors, (1813), 14 states have internal predecessors, (1813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:34,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:43:34,672 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:43:34,698 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9c0b84-4e37-457f-8a2f-c9f0d1ef985b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 07:43:34,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9c0b84-4e37-457f-8a2f-c9f0d1ef985b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-19 07:43:34,889 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)] === [2023-11-19 07:43:34,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:43:34,889 INFO L85 PathProgramCache]: Analyzing trace with hash 518467114, now seen corresponding path program 8 times [2023-11-19 07:43:34,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:43:34,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812643906] [2023-11-19 07:43:34,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:43:34,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:43:34,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:43:35,063 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:43:35,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:43:35,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812643906] [2023-11-19 07:43:35,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812643906] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:43:35,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894868591] [2023-11-19 07:43:35,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:43:35,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:43:35,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9c0b84-4e37-457f-8a2f-c9f0d1ef985b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:43:35,066 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9c0b84-4e37-457f-8a2f-c9f0d1ef985b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:43:35,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9c0b84-4e37-457f-8a2f-c9f0d1ef985b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 07:43:35,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:43:35,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:43:35,195 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-19 07:43:35,197 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:43:35,310 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:43:35,311 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:43:35,414 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:43:35,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894868591] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:43:35,415 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:43:35,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 18 [2023-11-19 07:43:35,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650492651] [2023-11-19 07:43:35,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:43:35,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-19 07:43:35,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:43:35,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-19 07:43:35,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342