./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/fib_unsafe-11.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 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_08e6c707-348c-4353-b5a5-d2c871829a62/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08e6c707-348c-4353-b5a5-d2c871829a62/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08e6c707-348c-4353-b5a5-d2c871829a62/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08e6c707-348c-4353-b5a5-d2c871829a62/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/fib_unsafe-11.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08e6c707-348c-4353-b5a5-d2c871829a62/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08e6c707-348c-4353-b5a5-d2c871829a62/bin/uautomizer-verify-uTZkv6EMXl --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 5b16c68af06359cf155927d2335a825cd179e6a83a999e1ead7a6952268e92c6 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:10:26,426 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:10:26,542 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08e6c707-348c-4353-b5a5-d2c871829a62/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-12 02:10:26,547 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:10:26,548 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:10:26,586 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:10:26,587 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:10:26,587 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:10:26,588 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:10:26,593 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:10:26,595 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:10:26,595 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:10:26,596 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:10:26,598 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:10:26,598 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:10:26,599 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:10:26,599 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:10:26,599 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:10:26,600 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:10:26,601 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:10:26,601 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:10:26,602 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:10:26,602 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:10:26,603 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:10:26,603 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:10:26,604 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:10:26,605 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:10:26,605 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:10:26,606 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:10:26,606 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:10:26,607 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:10:26,608 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:10:26,608 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:10:26,608 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:10:26,609 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:10:26,609 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:10:26,609 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:10:26,609 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:10:26,610 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:10:26,610 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_08e6c707-348c-4353-b5a5-d2c871829a62/bin/uautomizer-verify-uTZkv6EMXl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08e6c707-348c-4353-b5a5-d2c871829a62/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5b16c68af06359cf155927d2335a825cd179e6a83a999e1ead7a6952268e92c6 [2023-11-12 02:10:26,887 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:10:26,908 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:10:26,910 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:10:26,911 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:10:26,912 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:10:26,913 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08e6c707-348c-4353-b5a5-d2c871829a62/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/pthread/fib_unsafe-11.i [2023-11-12 02:10:29,927 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:10:30,182 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:10:30,183 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08e6c707-348c-4353-b5a5-d2c871829a62/sv-benchmarks/c/pthread/fib_unsafe-11.i [2023-11-12 02:10:30,199 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08e6c707-348c-4353-b5a5-d2c871829a62/bin/uautomizer-verify-uTZkv6EMXl/data/35d6e9476/3e3103152ee3421abad5b15dd1624d1e/FLAG4247bdb42 [2023-11-12 02:10:30,218 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08e6c707-348c-4353-b5a5-d2c871829a62/bin/uautomizer-verify-uTZkv6EMXl/data/35d6e9476/3e3103152ee3421abad5b15dd1624d1e [2023-11-12 02:10:30,225 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:10:30,226 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:10:30,227 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:10:30,227 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:10:30,237 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:10:30,238 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:10:30" (1/1) ... [2023-11-12 02:10:30,239 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ea8f0ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:10:30, skipping insertion in model container [2023-11-12 02:10:30,240 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:10:30" (1/1) ... [2023-11-12 02:10:30,285 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:10:30,615 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_08e6c707-348c-4353-b5a5-d2c871829a62/sv-benchmarks/c/pthread/fib_unsafe-11.i[30243,30256] [2023-11-12 02:10:30,645 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:10:30,657 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:10:30,716 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_08e6c707-348c-4353-b5a5-d2c871829a62/sv-benchmarks/c/pthread/fib_unsafe-11.i[30243,30256] [2023-11-12 02:10:30,734 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:10:30,780 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:10:30,781 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:10:30,789 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:10:30,789 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:10:30 WrapperNode [2023-11-12 02:10:30,789 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:10:30,791 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:10:30,791 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:10:30,791 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:10:30,799 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:10:30" (1/1) ... [2023-11-12 02:10:30,814 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:10:30" (1/1) ... [2023-11-12 02:10:30,837 INFO L138 Inliner]: procedures = 165, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 75 [2023-11-12 02:10:30,838 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:10:30,838 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:10:30,839 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:10:30,839 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:10:30,847 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:10:30" (1/1) ... [2023-11-12 02:10:30,848 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:10:30" (1/1) ... [2023-11-12 02:10:30,851 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:10:30" (1/1) ... [2023-11-12 02:10:30,852 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:10:30" (1/1) ... [2023-11-12 02:10:30,857 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:10:30" (1/1) ... [2023-11-12 02:10:30,861 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:10:30" (1/1) ... [2023-11-12 02:10:30,863 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:10:30" (1/1) ... [2023-11-12 02:10:30,865 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:10:30" (1/1) ... [2023-11-12 02:10:30,868 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:10:30,869 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:10:30,869 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:10:30,869 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:10:30,870 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:10:30" (1/1) ... [2023-11-12 02:10:30,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:10:30,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08e6c707-348c-4353-b5a5-d2c871829a62/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:10:30,906 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08e6c707-348c-4353-b5a5-d2c871829a62/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:10:30,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08e6c707-348c-4353-b5a5-d2c871829a62/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:10:30,957 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-11-12 02:10:30,957 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-11-12 02:10:30,958 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-11-12 02:10:30,958 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-11-12 02:10:30,958 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 02:10:30,958 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-12 02:10:30,958 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:10:30,959 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 02:10:30,959 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 02:10:30,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:10:30,961 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-12 02:10:30,961 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:10:30,962 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:10:30,963 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-12 02:10:31,154 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:10:31,157 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:10:31,336 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:10:31,343 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:10:31,343 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-12 02:10:31,346 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:10:31 BoogieIcfgContainer [2023-11-12 02:10:31,346 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:10:31,349 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:10:31,349 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:10:31,352 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:10:31,352 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:10:30" (1/3) ... [2023-11-12 02:10:31,353 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f852e94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:10:31, skipping insertion in model container [2023-11-12 02:10:31,353 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:10:30" (2/3) ... [2023-11-12 02:10:31,354 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f852e94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:10:31, skipping insertion in model container [2023-11-12 02:10:31,354 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:10:31" (3/3) ... [2023-11-12 02:10:31,355 INFO L112 eAbstractionObserver]: Analyzing ICFG fib_unsafe-11.i [2023-11-12 02:10:31,364 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-12 02:10:31,392 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:10:31,392 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 02:10:31,392 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-12 02:10:31,454 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-12 02:10:31,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 97 places, 97 transitions, 202 flow [2023-11-12 02:10:31,537 INFO L124 PetriNetUnfolderBase]: 7/95 cut-off events. [2023-11-12 02:10:31,538 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:10:31,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102 conditions, 95 events. 7/95 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 74 event pairs, 0 based on Foata normal form. 0/87 useless extension candidates. Maximal degree in co-relation 70. Up to 2 conditions per place. [2023-11-12 02:10:31,545 INFO L82 GeneralOperation]: Start removeDead. Operand has 97 places, 97 transitions, 202 flow [2023-11-12 02:10:31,556 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 95 places, 95 transitions, 196 flow [2023-11-12 02:10:31,563 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:10:31,572 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 95 places, 95 transitions, 196 flow [2023-11-12 02:10:31,575 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 95 places, 95 transitions, 196 flow [2023-11-12 02:10:31,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 95 places, 95 transitions, 196 flow [2023-11-12 02:10:31,610 INFO L124 PetriNetUnfolderBase]: 7/95 cut-off events. [2023-11-12 02:10:31,610 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:10:31,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102 conditions, 95 events. 7/95 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 74 event pairs, 0 based on Foata normal form. 0/87 useless extension candidates. Maximal degree in co-relation 70. Up to 2 conditions per place. [2023-11-12 02:10:31,617 INFO L119 LiptonReduction]: Number of co-enabled transitions 2134 [2023-11-12 02:10:35,499 INFO L134 LiptonReduction]: Checked pairs total: 1542 [2023-11-12 02:10:35,499 INFO L136 LiptonReduction]: Total number of compositions: 95 [2023-11-12 02:10:35,515 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:10:35,522 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;@6117646f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:10:35,522 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-12 02:10:35,527 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:10:35,527 INFO L124 PetriNetUnfolderBase]: 3/12 cut-off events. [2023-11-12 02:10:35,527 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:10:35,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:10:35,528 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-12 02:10:35,528 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:10:35,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:10:35,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1878456515, now seen corresponding path program 1 times [2023-11-12 02:10:35,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:10:35,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62418406] [2023-11-12 02:10:35,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:10:35,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:10:35,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:10:35,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:10:35,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:10:35,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62418406] [2023-11-12 02:10:35,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62418406] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:10:35,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:10:35,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:10:35,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186930196] [2023-11-12 02:10:35,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:10:35,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:10:35,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:10:35,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:10:35,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:10:35,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 192 [2023-11-12 02:10:35,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 14 transitions, 34 flow. Second operand has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:10:35,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:10:35,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 192 [2023-11-12 02:10:35,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:10:36,041 INFO L124 PetriNetUnfolderBase]: 97/149 cut-off events. [2023-11-12 02:10:36,042 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-12 02:10:36,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 310 conditions, 149 events. 97/149 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 331 event pairs, 20 based on Foata normal form. 0/99 useless extension candidates. Maximal degree in co-relation 300. Up to 91 conditions per place. [2023-11-12 02:10:36,047 INFO L140 encePairwiseOnDemand]: 188/192 looper letters, 18 selfloop transitions, 2 changer transitions 1/21 dead transitions. [2023-11-12 02:10:36,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 21 transitions, 90 flow [2023-11-12 02:10:36,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:10:36,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:10:36,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 281 transitions. [2023-11-12 02:10:36,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4878472222222222 [2023-11-12 02:10:36,074 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 281 transitions. [2023-11-12 02:10:36,075 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 281 transitions. [2023-11-12 02:10:36,079 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:10:36,081 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 281 transitions. [2023-11-12 02:10:36,088 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:10:36,093 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 192.0) internal successors, (768), 4 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:10:36,094 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 192.0) internal successors, (768), 4 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:10:36,096 INFO L175 Difference]: Start difference. First operand has 18 places, 14 transitions, 34 flow. Second operand 3 states and 281 transitions. [2023-11-12 02:10:36,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 21 transitions, 90 flow [2023-11-12 02:10:36,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 21 transitions, 88 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-12 02:10:36,102 INFO L231 Difference]: Finished difference. Result has 19 places, 14 transitions, 42 flow [2023-11-12 02:10:36,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=32, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=42, PETRI_PLACES=19, PETRI_TRANSITIONS=14} [2023-11-12 02:10:36,108 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 1 predicate places. [2023-11-12 02:10:36,108 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 14 transitions, 42 flow [2023-11-12 02:10:36,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:10:36,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:10:36,109 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:10:36,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 02:10:36,110 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:10:36,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:10:36,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1897390208, now seen corresponding path program 1 times [2023-11-12 02:10:36,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:10:36,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065711422] [2023-11-12 02:10:36,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:10:36,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:10:36,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:10:36,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:10:36,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:10:36,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065711422] [2023-11-12 02:10:36,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065711422] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:10:36,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254059678] [2023-11-12 02:10:36,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:10:36,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:10:36,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08e6c707-348c-4353-b5a5-d2c871829a62/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:10:36,281 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08e6c707-348c-4353-b5a5-d2c871829a62/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:10:36,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08e6c707-348c-4353-b5a5-d2c871829a62/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:10:36,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:10:36,431 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 02:10:36,436 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:10:36,488 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:10:36,489 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:10:36,515 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:10:36,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254059678] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:10:36,516 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:10:36,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-12 02:10:36,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45793014] [2023-11-12 02:10:36,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:10:36,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:10:36,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:10:36,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:10:36,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:10:36,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 192 [2023-11-12 02:10:36,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 14 transitions, 42 flow. Second operand has 7 states, 7 states have (on average 86.71428571428571) internal successors, (607), 7 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:10:36,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:10:36,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 192 [2023-11-12 02:10:36,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:10:36,708 INFO L124 PetriNetUnfolderBase]: 133/203 cut-off events. [2023-11-12 02:10:36,709 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-12 02:10:36,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 482 conditions, 203 events. 133/203 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 448 event pairs, 20 based on Foata normal form. 0/150 useless extension candidates. Maximal degree in co-relation 471. Up to 64 conditions per place. [2023-11-12 02:10:36,719 INFO L140 encePairwiseOnDemand]: 189/192 looper letters, 36 selfloop transitions, 5 changer transitions 0/41 dead transitions. [2023-11-12 02:10:36,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 41 transitions, 184 flow [2023-11-12 02:10:36,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:10:36,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-12 02:10:36,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 554 transitions. [2023-11-12 02:10:36,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4809027777777778 [2023-11-12 02:10:36,725 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 554 transitions. [2023-11-12 02:10:36,726 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 554 transitions. [2023-11-12 02:10:36,732 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:10:36,733 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 554 transitions. [2023-11-12 02:10:36,735 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 92.33333333333333) internal successors, (554), 6 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:10:36,741 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 192.0) internal successors, (1344), 7 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:10:36,742 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 192.0) internal successors, (1344), 7 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:10:36,742 INFO L175 Difference]: Start difference. First operand has 19 places, 14 transitions, 42 flow. Second operand 6 states and 554 transitions. [2023-11-12 02:10:36,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 41 transitions, 184 flow [2023-11-12 02:10:36,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 41 transitions, 182 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:10:36,745 INFO L231 Difference]: Finished difference. Result has 25 places, 17 transitions, 76 flow [2023-11-12 02:10:36,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=76, PETRI_PLACES=25, PETRI_TRANSITIONS=17} [2023-11-12 02:10:36,746 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 7 predicate places. [2023-11-12 02:10:36,746 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 17 transitions, 76 flow [2023-11-12 02:10:36,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 86.71428571428571) internal successors, (607), 7 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:10:36,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:10:36,748 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2023-11-12 02:10:36,764 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08e6c707-348c-4353-b5a5-d2c871829a62/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 02:10:36,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08e6c707-348c-4353-b5a5-d2c871829a62/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:10:36,955 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:10:36,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:10:36,956 INFO L85 PathProgramCache]: Analyzing trace with hash -912867331, now seen corresponding path program 2 times [2023-11-12 02:10:36,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:10:36,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369530488] [2023-11-12 02:10:36,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:10:36,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:10:37,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:10:37,112 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:10:37,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:10:37,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369530488] [2023-11-12 02:10:37,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369530488] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:10:37,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090876355] [2023-11-12 02:10:37,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:10:37,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:10:37,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08e6c707-348c-4353-b5a5-d2c871829a62/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:10:37,116 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08e6c707-348c-4353-b5a5-d2c871829a62/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:10:37,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08e6c707-348c-4353-b5a5-d2c871829a62/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:10:37,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:10:37,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:10:37,243 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:10:37,245 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:10:37,267 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:10:37,267 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:10:37,329 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:10:37,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090876355] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:10:37,329 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:10:37,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-12 02:10:37,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65431694] [2023-11-12 02:10:37,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:10:37,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-12 02:10:37,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:10:37,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-12 02:10:37,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-12 02:10:37,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 192 [2023-11-12 02:10:37,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 17 transitions, 76 flow. Second operand has 13 states, 13 states have (on average 86.38461538461539) internal successors, (1123), 13 states have internal predecessors, (1123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:10:37,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:10:37,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 192 [2023-11-12 02:10:37,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:10:37,549 INFO L124 PetriNetUnfolderBase]: 241/365 cut-off events. [2023-11-12 02:10:37,550 INFO L125 PetriNetUnfolderBase]: For 207/207 co-relation queries the response was YES. [2023-11-12 02:10:37,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1008 conditions, 365 events. 241/365 cut-off events. For 207/207 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 847 event pairs, 20 based on Foata normal form. 54/339 useless extension candidates. Maximal degree in co-relation 993. Up to 109 conditions per place. [2023-11-12 02:10:37,554 INFO L140 encePairwiseOnDemand]: 189/192 looper letters, 72 selfloop transitions, 11 changer transitions 0/83 dead transitions. [2023-11-12 02:10:37,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 83 transitions, 398 flow [2023-11-12 02:10:37,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-12 02:10:37,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-12 02:10:37,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1109 transitions. [2023-11-12 02:10:37,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4813368055555556 [2023-11-12 02:10:37,560 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1109 transitions. [2023-11-12 02:10:37,560 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1109 transitions. [2023-11-12 02:10:37,562 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:10:37,562 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1109 transitions. [2023-11-12 02:10:37,566 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 92.41666666666667) internal successors, (1109), 12 states have internal predecessors, (1109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:10:37,571 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 192.0) internal successors, (2496), 13 states have internal predecessors, (2496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:10:37,574 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 192.0) internal successors, (2496), 13 states have internal predecessors, (2496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:10:37,574 INFO L175 Difference]: Start difference. First operand has 25 places, 17 transitions, 76 flow. Second operand 12 states and 1109 transitions. [2023-11-12 02:10:37,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 83 transitions, 398 flow [2023-11-12 02:10:37,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 83 transitions, 384 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-12 02:10:37,580 INFO L231 Difference]: Finished difference. Result has 41 places, 23 transitions, 146 flow [2023-11-12 02:10:37,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=146, PETRI_PLACES=41, PETRI_TRANSITIONS=23} [2023-11-12 02:10:37,581 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 23 predicate places. [2023-11-12 02:10:37,581 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 23 transitions, 146 flow [2023-11-12 02:10:37,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 86.38461538461539) internal successors, (1123), 13 states have internal predecessors, (1123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:10:37,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:10:37,583 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2023-11-12 02:10:37,594 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08e6c707-348c-4353-b5a5-d2c871829a62/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 02:10:37,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08e6c707-348c-4353-b5a5-d2c871829a62/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:10:37,789 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:10:37,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:10:37,790 INFO L85 PathProgramCache]: Analyzing trace with hash 32956701, now seen corresponding path program 3 times [2023-11-12 02:10:37,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:10:37,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671971211] [2023-11-12 02:10:37,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:10:37,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:10:37,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:10:38,076 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:10:38,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:10:38,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671971211] [2023-11-12 02:10:38,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671971211] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:10:38,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89145963] [2023-11-12 02:10:38,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 02:10:38,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:10:38,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08e6c707-348c-4353-b5a5-d2c871829a62/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:10:38,079 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08e6c707-348c-4353-b5a5-d2c871829a62/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:10:38,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08e6c707-348c-4353-b5a5-d2c871829a62/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 02:10:38,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-11-12 02:10:38,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:10:38,200 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-12 02:10:38,201 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:10:38,242 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:10:38,242 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:10:38,481 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:10:38,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89145963] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:10:38,482 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:10:38,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2023-11-12 02:10:38,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367582665] [2023-11-12 02:10:38,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:10:38,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-12 02:10:38,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:10:38,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-12 02:10:38,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-11-12 02:10:38,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 192 [2023-11-12 02:10:38,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 23 transitions, 146 flow. Second operand has 25 states, 25 states have (on average 86.2) internal successors, (2155), 25 states have internal predecessors, (2155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:10:38,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:10:38,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 192 [2023-11-12 02:10:38,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:10:38,985 INFO L124 PetriNetUnfolderBase]: 457/689 cut-off events. [2023-11-12 02:10:38,986 INFO L125 PetriNetUnfolderBase]: For 4203/4203 co-relation queries the response was YES. [2023-11-12 02:10:38,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2140 conditions, 689 events. 457/689 cut-off events. For 4203/4203 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1645 event pairs, 20 based on Foata normal form. 108/645 useless extension candidates. Maximal degree in co-relation 2118. Up to 190 conditions per place. [2023-11-12 02:10:38,994 INFO L140 encePairwiseOnDemand]: 189/192 looper letters, 144 selfloop transitions, 23 changer transitions 0/167 dead transitions. [2023-11-12 02:10:38,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 167 transitions, 840 flow [2023-11-12 02:10:38,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-12 02:10:38,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-12 02:10:39,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2219 transitions. [2023-11-12 02:10:39,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4815538194444444 [2023-11-12 02:10:39,005 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2219 transitions. [2023-11-12 02:10:39,005 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2219 transitions. [2023-11-12 02:10:39,007 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:10:39,007 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2219 transitions. [2023-11-12 02:10:39,013 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 92.45833333333333) internal successors, (2219), 24 states have internal predecessors, (2219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:10:39,023 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 192.0) internal successors, (4800), 25 states have internal predecessors, (4800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:10:39,025 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 192.0) internal successors, (4800), 25 states have internal predecessors, (4800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:10:39,025 INFO L175 Difference]: Start difference. First operand has 41 places, 23 transitions, 146 flow. Second operand 24 states and 2219 transitions. [2023-11-12 02:10:39,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 167 transitions, 840 flow [2023-11-12 02:10:39,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 167 transitions, 768 flow, removed 31 selfloop flow, removed 5 redundant places. [2023-11-12 02:10:39,040 INFO L231 Difference]: Finished difference. Result has 71 places, 35 transitions, 266 flow [2023-11-12 02:10:39,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=266, PETRI_PLACES=71, PETRI_TRANSITIONS=35} [2023-11-12 02:10:39,042 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 53 predicate places. [2023-11-12 02:10:39,042 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 35 transitions, 266 flow [2023-11-12 02:10:39,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 86.2) internal successors, (2155), 25 states have internal predecessors, (2155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:10:39,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:10:39,045 INFO L208 CegarLoopForPetriNet]: trace histogram [22, 1, 1, 1, 1, 1, 1] [2023-11-12 02:10:39,051 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08e6c707-348c-4353-b5a5-d2c871829a62/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 02:10:39,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08e6c707-348c-4353-b5a5-d2c871829a62/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:10:39,251 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:10:39,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:10:39,252 INFO L85 PathProgramCache]: Analyzing trace with hash 425270109, now seen corresponding path program 4 times [2023-11-12 02:10:39,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:10:39,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884446229] [2023-11-12 02:10:39,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:10:39,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:10:39,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:10:39,870 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:10:39,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:10:39,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884446229] [2023-11-12 02:10:39,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884446229] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:10:39,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108732870] [2023-11-12 02:10:39,871 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 02:10:39,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:10:39,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08e6c707-348c-4353-b5a5-d2c871829a62/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:10:39,874 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08e6c707-348c-4353-b5a5-d2c871829a62/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:10:39,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08e6c707-348c-4353-b5a5-d2c871829a62/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 02:10:40,032 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 02:10:40,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:10:40,035 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-12 02:10:40,038 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:10:40,119 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:10:40,119 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:10:40,487 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:10:40,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108732870] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:10:40,487 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:10:40,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 26 [2023-11-12 02:10:40,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386424857] [2023-11-12 02:10:40,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:10:40,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-12 02:10:40,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:10:40,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-12 02:10:40,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2023-11-12 02:10:40,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 192 [2023-11-12 02:10:40,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 35 transitions, 266 flow. Second operand has 27 states, 27 states have (on average 86.22222222222223) internal successors, (2328), 27 states have internal predecessors, (2328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:10:40,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:10:40,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 192 [2023-11-12 02:10:40,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:10:40,925 INFO L124 PetriNetUnfolderBase]: 493/743 cut-off events. [2023-11-12 02:10:40,926 INFO L125 PetriNetUnfolderBase]: For 5553/5553 co-relation queries the response was YES. [2023-11-12 02:10:40,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2422 conditions, 743 events. 493/743 cut-off events. For 5553/5553 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1777 event pairs, 20 based on Foata normal form. 18/597 useless extension candidates. Maximal degree in co-relation 2388. Up to 166 conditions per place. [2023-11-12 02:10:40,936 INFO L140 encePairwiseOnDemand]: 189/192 looper letters, 156 selfloop transitions, 25 changer transitions 0/181 dead transitions. [2023-11-12 02:10:40,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 181 transitions, 932 flow [2023-11-12 02:10:40,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-12 02:10:40,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-12 02:10:40,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2393 transitions. [2023-11-12 02:10:40,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47936698717948717 [2023-11-12 02:10:40,946 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2393 transitions. [2023-11-12 02:10:40,946 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2393 transitions. [2023-11-12 02:10:40,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:10:40,948 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2393 transitions. [2023-11-12 02:10:40,954 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 92.03846153846153) internal successors, (2393), 26 states have internal predecessors, (2393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:10:40,964 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 192.0) internal successors, (5184), 27 states have internal predecessors, (5184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:10:40,966 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 192.0) internal successors, (5184), 27 states have internal predecessors, (5184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:10:40,967 INFO L175 Difference]: Start difference. First operand has 71 places, 35 transitions, 266 flow. Second operand 26 states and 2393 transitions. [2023-11-12 02:10:40,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 181 transitions, 932 flow [2023-11-12 02:10:40,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 181 transitions, 832 flow, removed 39 selfloop flow, removed 11 redundant places. [2023-11-12 02:10:40,986 INFO L231 Difference]: Finished difference. Result has 87 places, 37 transitions, 242 flow [2023-11-12 02:10:40,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=242, PETRI_PLACES=87, PETRI_TRANSITIONS=37} [2023-11-12 02:10:40,987 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 69 predicate places. [2023-11-12 02:10:40,988 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 37 transitions, 242 flow [2023-11-12 02:10:40,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 86.22222222222223) internal successors, (2328), 27 states have internal predecessors, (2328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:10:40,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:10:40,990 INFO L208 CegarLoopForPetriNet]: trace histogram [24, 1, 1, 1, 1, 1, 1] [2023-11-12 02:10:41,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08e6c707-348c-4353-b5a5-d2c871829a62/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 02:10:41,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08e6c707-348c-4353-b5a5-d2c871829a62/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:10:41,197 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:10:41,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:10:41,197 INFO L85 PathProgramCache]: Analyzing trace with hash 662682557, now seen corresponding path program 5 times [2023-11-12 02:10:41,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:10:41,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188164678] [2023-11-12 02:10:41,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:10:41,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:10:41,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:10:43,679 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:10:43,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:10:43,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188164678] [2023-11-12 02:10:43,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188164678] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:10:43,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291194977] [2023-11-12 02:10:43,680 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-12 02:10:43,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:10:43,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08e6c707-348c-4353-b5a5-d2c871829a62/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:10:43,682 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08e6c707-348c-4353-b5a5-d2c871829a62/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:10:43,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08e6c707-348c-4353-b5a5-d2c871829a62/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 02:10:43,825 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2023-11-12 02:10:43,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:10:43,829 INFO L262 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 80 conjunts are in the unsatisfiable core [2023-11-12 02:10:43,833 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:10:45,571 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 253 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:10:45,571 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:10:47,771 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:10:47,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291194977] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:10:47,772 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:10:47,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 75 [2023-11-12 02:10:47,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110550008] [2023-11-12 02:10:47,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:10:47,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2023-11-12 02:10:47,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:10:47,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2023-11-12 02:10:47,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1023, Invalid=4829, Unknown=0, NotChecked=0, Total=5852 [2023-11-12 02:10:50,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 192 [2023-11-12 02:10:50,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 37 transitions, 242 flow. Second operand has 77 states, 77 states have (on average 81.16883116883118) internal successors, (6250), 77 states have internal predecessors, (6250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:10:50,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:10:50,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 192 [2023-11-12 02:10:50,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand