./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/stack_longest-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba371fd1-0e16-4525-90e6-dd6a30f0b35d/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba371fd1-0e16-4525-90e6-dd6a30f0b35d/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_ba371fd1-0e16-4525-90e6-dd6a30f0b35d/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba371fd1-0e16-4525-90e6-dd6a30f0b35d/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/stack_longest-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba371fd1-0e16-4525-90e6-dd6a30f0b35d/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_ba371fd1-0e16-4525-90e6-dd6a30f0b35d/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 529fe0895c01c52d9b18b51c32204a307faf547c0c07b22bc1a431308affcf90 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:36:07,832 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:36:07,995 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba371fd1-0e16-4525-90e6-dd6a30f0b35d/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:36:08,002 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:36:08,003 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:36:08,053 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:36:08,054 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:36:08,055 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:36:08,056 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:36:08,062 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:36:08,063 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:36:08,064 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:36:08,064 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:36:08,067 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:36:08,067 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:36:08,068 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:36:08,068 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:36:08,068 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:36:08,069 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:36:08,069 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:36:08,070 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:36:08,071 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:36:08,071 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:36:08,072 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:36:08,074 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:36:08,075 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:36:08,075 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:36:08,076 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:36:08,076 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:36:08,077 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:36:08,079 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:36:08,079 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:36:08,079 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:36:08,080 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:36:08,080 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:36:08,080 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:36:08,080 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:36:08,081 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:36:08,081 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:36:08,081 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_ba371fd1-0e16-4525-90e6-dd6a30f0b35d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba371fd1-0e16-4525-90e6-dd6a30f0b35d/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 529fe0895c01c52d9b18b51c32204a307faf547c0c07b22bc1a431308affcf90 [2023-11-19 07:36:08,466 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:36:08,493 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:36:08,496 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:36:08,498 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:36:08,499 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:36:08,500 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba371fd1-0e16-4525-90e6-dd6a30f0b35d/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/pthread/stack_longest-1.i [2023-11-19 07:36:12,326 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:36:12,799 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:36:12,804 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba371fd1-0e16-4525-90e6-dd6a30f0b35d/sv-benchmarks/c/pthread/stack_longest-1.i [2023-11-19 07:36:12,840 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba371fd1-0e16-4525-90e6-dd6a30f0b35d/bin/uautomizer-verify-uCwYo4JHxu/data/c15611a2f/16e914a3468a4446a87db71d3b801aef/FLAG9e71e8fe6 [2023-11-19 07:36:12,869 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba371fd1-0e16-4525-90e6-dd6a30f0b35d/bin/uautomizer-verify-uCwYo4JHxu/data/c15611a2f/16e914a3468a4446a87db71d3b801aef [2023-11-19 07:36:12,879 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:36:12,881 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:36:12,890 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:36:12,892 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:36:12,901 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:36:12,905 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:36:12" (1/1) ... [2023-11-19 07:36:12,907 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19c3f845 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:12, skipping insertion in model container [2023-11-19 07:36:12,907 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:36:12" (1/1) ... [2023-11-19 07:36:13,011 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:36:13,726 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_ba371fd1-0e16-4525-90e6-dd6a30f0b35d/sv-benchmarks/c/pthread/stack_longest-1.i[41530,41543] [2023-11-19 07:36:13,764 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:36:13,782 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:36:13,833 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_ba371fd1-0e16-4525-90e6-dd6a30f0b35d/sv-benchmarks/c/pthread/stack_longest-1.i[41530,41543] [2023-11-19 07:36:13,848 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:36:13,934 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:36:13,935 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:13 WrapperNode [2023-11-19 07:36:13,935 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:36:13,936 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:36:13,937 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:36:13,937 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:36:13,947 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:13" (1/1) ... [2023-11-19 07:36:13,971 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:13" (1/1) ... [2023-11-19 07:36:14,018 INFO L138 Inliner]: procedures = 277, calls = 39, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 155 [2023-11-19 07:36:14,019 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:36:14,020 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:36:14,020 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:36:14,021 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:36:14,035 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:13" (1/1) ... [2023-11-19 07:36:14,035 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:13" (1/1) ... [2023-11-19 07:36:14,044 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:13" (1/1) ... [2023-11-19 07:36:14,044 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:13" (1/1) ... [2023-11-19 07:36:14,071 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:13" (1/1) ... [2023-11-19 07:36:14,076 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:13" (1/1) ... [2023-11-19 07:36:14,079 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:13" (1/1) ... [2023-11-19 07:36:14,081 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:13" (1/1) ... [2023-11-19 07:36:14,087 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:36:14,088 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:36:14,088 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:36:14,089 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:36:14,090 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:13" (1/1) ... [2023-11-19 07:36:14,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:36:14,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba371fd1-0e16-4525-90e6-dd6a30f0b35d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:36:14,128 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba371fd1-0e16-4525-90e6-dd6a30f0b35d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:36:14,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba371fd1-0e16-4525-90e6-dd6a30f0b35d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:36:14,169 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-11-19 07:36:14,170 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-11-19 07:36:14,170 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-11-19 07:36:14,170 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-11-19 07:36:14,170 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:36:14,170 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:36:14,170 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:36:14,170 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:36:14,170 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-19 07:36:14,171 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:36:14,171 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:36:14,171 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:36:14,171 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:36:14,173 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 07:36:14,376 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:36:14,379 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:36:14,703 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:36:14,718 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:36:14,718 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-19 07:36:14,724 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:36:14 BoogieIcfgContainer [2023-11-19 07:36:14,724 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:36:14,727 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:36:14,727 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:36:14,731 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:36:14,731 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:36:12" (1/3) ... [2023-11-19 07:36:14,733 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a362856 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:36:14, skipping insertion in model container [2023-11-19 07:36:14,733 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:13" (2/3) ... [2023-11-19 07:36:14,734 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a362856 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:36:14, skipping insertion in model container [2023-11-19 07:36:14,734 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:36:14" (3/3) ... [2023-11-19 07:36:14,735 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longest-1.i [2023-11-19 07:36:14,744 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-19 07:36:14,753 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:36:14,754 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-19 07:36:14,754 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:36:14,932 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-19 07:36:14,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 163 places, 166 transitions, 346 flow [2023-11-19 07:36:15,110 INFO L124 PetriNetUnfolderBase]: 10/164 cut-off events. [2023-11-19 07:36:15,111 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:36:15,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173 conditions, 164 events. 10/164 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 424 event pairs, 0 based on Foata normal form. 0/152 useless extension candidates. Maximal degree in co-relation 126. Up to 3 conditions per place. [2023-11-19 07:36:15,129 INFO L82 GeneralOperation]: Start removeDead. Operand has 163 places, 166 transitions, 346 flow [2023-11-19 07:36:15,144 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 151 places, 154 transitions, 317 flow [2023-11-19 07:36:15,150 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:36:15,175 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 151 places, 154 transitions, 317 flow [2023-11-19 07:36:15,182 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 151 places, 154 transitions, 317 flow [2023-11-19 07:36:15,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 151 places, 154 transitions, 317 flow [2023-11-19 07:36:15,288 INFO L124 PetriNetUnfolderBase]: 10/154 cut-off events. [2023-11-19 07:36:15,289 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-19 07:36:15,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162 conditions, 154 events. 10/154 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 344 event pairs, 0 based on Foata normal form. 0/142 useless extension candidates. Maximal degree in co-relation 126. Up to 3 conditions per place. [2023-11-19 07:36:15,309 INFO L119 LiptonReduction]: Number of co-enabled transitions 8340 [2023-11-19 07:36:20,888 INFO L134 LiptonReduction]: Checked pairs total: 10950 [2023-11-19 07:36:20,888 INFO L136 LiptonReduction]: Total number of compositions: 148 [2023-11-19 07:36:20,908 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:36:20,917 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;@21774434, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:36:20,917 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-19 07:36:20,923 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:36:20,924 INFO L124 PetriNetUnfolderBase]: 0/14 cut-off events. [2023-11-19 07:36:20,924 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-19 07:36:20,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:36:20,925 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-19 07:36:20,926 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-19 07:36:20,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:20,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1584231326, now seen corresponding path program 1 times [2023-11-19 07:36:20,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:20,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354530561] [2023-11-19 07:36:20,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:20,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:21,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:21,360 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 07:36:21,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:36:21,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354530561] [2023-11-19 07:36:21,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354530561] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:36:21,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:36:21,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:36:21,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556623653] [2023-11-19 07:36:21,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:36:21,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:36:21,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:36:21,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:36:21,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:36:21,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 314 [2023-11-19 07:36:21,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 0 states have call successors, (0), 0 states 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 07:36:21,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:36:21,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 314 [2023-11-19 07:36:21,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:36:21,844 INFO L124 PetriNetUnfolderBase]: 773/1280 cut-off events. [2023-11-19 07:36:21,844 INFO L125 PetriNetUnfolderBase]: For 57/57 co-relation queries the response was YES. [2023-11-19 07:36:21,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2576 conditions, 1280 events. 773/1280 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 5414 event pairs, 216 based on Foata normal form. 0/1034 useless extension candidates. Maximal degree in co-relation 2370. Up to 714 conditions per place. [2023-11-19 07:36:21,862 INFO L140 encePairwiseOnDemand]: 309/314 looper letters, 53 selfloop transitions, 4 changer transitions 0/59 dead transitions. [2023-11-19 07:36:21,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 59 transitions, 247 flow [2023-11-19 07:36:21,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:36:21,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:36:21,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 511 transitions. [2023-11-19 07:36:21,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5424628450106157 [2023-11-19 07:36:21,897 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 511 transitions. [2023-11-19 07:36:21,898 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 511 transitions. [2023-11-19 07:36:21,904 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:36:21,907 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 511 transitions. [2023-11-19 07:36:21,915 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 170.33333333333334) internal successors, (511), 3 states have internal predecessors, (511), 0 states have call successors, (0), 0 states 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 07:36:21,924 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states 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 07:36:21,926 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states 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 07:36:21,928 INFO L175 Difference]: Start difference. First operand has 35 places, 33 transitions, 75 flow. Second operand 3 states and 511 transitions. [2023-11-19 07:36:21,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 59 transitions, 247 flow [2023-11-19 07:36:21,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 59 transitions, 239 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-19 07:36:21,940 INFO L231 Difference]: Finished difference. Result has 36 places, 36 transitions, 100 flow [2023-11-19 07:36:21,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=36, PETRI_TRANSITIONS=36} [2023-11-19 07:36:21,948 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 1 predicate places. [2023-11-19 07:36:21,949 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 36 transitions, 100 flow [2023-11-19 07:36:21,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 0 states have call successors, (0), 0 states 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 07:36:21,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:36:21,950 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:36:21,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:36:21,952 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-19 07:36:21,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:21,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1481729303, now seen corresponding path program 1 times [2023-11-19 07:36:21,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:21,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668474839] [2023-11-19 07:36:21,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:21,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:22,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:22,226 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 07:36:22,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:36:22,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668474839] [2023-11-19 07:36:22,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668474839] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:36:22,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:36:22,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:36:22,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474318334] [2023-11-19 07:36:22,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:36:22,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:36:22,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:36:22,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:36:22,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:36:22,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 314 [2023-11-19 07:36:22,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 36 transitions, 100 flow. Second operand has 3 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 0 states have call successors, (0), 0 states 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 07:36:22,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:36:22,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 314 [2023-11-19 07:36:22,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:36:22,530 INFO L124 PetriNetUnfolderBase]: 808/1356 cut-off events. [2023-11-19 07:36:22,530 INFO L125 PetriNetUnfolderBase]: For 175/175 co-relation queries the response was YES. [2023-11-19 07:36:22,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2924 conditions, 1356 events. 808/1356 cut-off events. For 175/175 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 5680 event pairs, 355 based on Foata normal form. 20/1174 useless extension candidates. Maximal degree in co-relation 2675. Up to 1082 conditions per place. [2023-11-19 07:36:22,542 INFO L140 encePairwiseOnDemand]: 311/314 looper letters, 46 selfloop transitions, 2 changer transitions 3/53 dead transitions. [2023-11-19 07:36:22,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 53 transitions, 243 flow [2023-11-19 07:36:22,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:36:22,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:36:22,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 505 transitions. [2023-11-19 07:36:22,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5360934182590233 [2023-11-19 07:36:22,546 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 505 transitions. [2023-11-19 07:36:22,546 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 505 transitions. [2023-11-19 07:36:22,547 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:36:22,547 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 505 transitions. [2023-11-19 07:36:22,549 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 168.33333333333334) internal successors, (505), 3 states have internal predecessors, (505), 0 states have call successors, (0), 0 states 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 07:36:22,552 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states 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 07:36:22,554 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states 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 07:36:22,554 INFO L175 Difference]: Start difference. First operand has 36 places, 36 transitions, 100 flow. Second operand 3 states and 505 transitions. [2023-11-19 07:36:22,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 53 transitions, 243 flow [2023-11-19 07:36:22,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 53 transitions, 233 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:36:22,558 INFO L231 Difference]: Finished difference. Result has 37 places, 37 transitions, 104 flow [2023-11-19 07:36:22,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=37, PETRI_TRANSITIONS=37} [2023-11-19 07:36:22,560 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 2 predicate places. [2023-11-19 07:36:22,560 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 37 transitions, 104 flow [2023-11-19 07:36:22,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 0 states have call successors, (0), 0 states 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 07:36:22,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:36:22,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:36:22,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:36:22,562 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-19 07:36:22,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:22,562 INFO L85 PathProgramCache]: Analyzing trace with hash -608831757, now seen corresponding path program 1 times [2023-11-19 07:36:22,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:22,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172326788] [2023-11-19 07:36:22,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:22,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:22,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:22,650 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 07:36:22,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:36:22,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172326788] [2023-11-19 07:36:22,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172326788] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:36:22,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:36:22,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:36:22,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500538898] [2023-11-19 07:36:22,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:36:22,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:36:22,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:36:22,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:36:22,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:36:22,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 314 [2023-11-19 07:36:22,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 37 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 0 states have call successors, (0), 0 states 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 07:36:22,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:36:22,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 314 [2023-11-19 07:36:22,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:36:22,935 INFO L124 PetriNetUnfolderBase]: 861/1440 cut-off events. [2023-11-19 07:36:22,936 INFO L125 PetriNetUnfolderBase]: For 135/135 co-relation queries the response was YES. [2023-11-19 07:36:22,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3178 conditions, 1440 events. 861/1440 cut-off events. For 135/135 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 6166 event pairs, 584 based on Foata normal form. 50/1332 useless extension candidates. Maximal degree in co-relation 2922. Up to 1258 conditions per place. [2023-11-19 07:36:22,949 INFO L140 encePairwiseOnDemand]: 311/314 looper letters, 50 selfloop transitions, 4 changer transitions 0/56 dead transitions. [2023-11-19 07:36:22,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 56 transitions, 264 flow [2023-11-19 07:36:22,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:36:22,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:36:22,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 502 transitions. [2023-11-19 07:36:22,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5329087048832272 [2023-11-19 07:36:22,953 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 502 transitions. [2023-11-19 07:36:22,953 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 502 transitions. [2023-11-19 07:36:22,954 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:36:22,954 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 502 transitions. [2023-11-19 07:36:22,956 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 167.33333333333334) internal successors, (502), 3 states have internal predecessors, (502), 0 states have call successors, (0), 0 states 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 07:36:22,959 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states 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 07:36:22,961 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states 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 07:36:22,961 INFO L175 Difference]: Start difference. First operand has 37 places, 37 transitions, 104 flow. Second operand 3 states and 502 transitions. [2023-11-19 07:36:22,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 56 transitions, 264 flow [2023-11-19 07:36:22,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 56 transitions, 262 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:36:22,964 INFO L231 Difference]: Finished difference. Result has 39 places, 38 transitions, 122 flow [2023-11-19 07:36:22,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=39, PETRI_TRANSITIONS=38} [2023-11-19 07:36:22,965 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 4 predicate places. [2023-11-19 07:36:23,006 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 38 transitions, 122 flow [2023-11-19 07:36:23,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 0 states have call successors, (0), 0 states 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 07:36:23,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:36:23,008 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:36:23,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 07:36:23,008 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-19 07:36:23,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:23,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1802784065, now seen corresponding path program 1 times [2023-11-19 07:36:23,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:23,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158397819] [2023-11-19 07:36:23,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:23,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:23,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:23,155 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:36:23,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:36:23,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158397819] [2023-11-19 07:36:23,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158397819] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:36:23,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753839994] [2023-11-19 07:36:23,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:23,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:36:23,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba371fd1-0e16-4525-90e6-dd6a30f0b35d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:36:23,161 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba371fd1-0e16-4525-90e6-dd6a30f0b35d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:36:23,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba371fd1-0e16-4525-90e6-dd6a30f0b35d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:36:23,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:23,367 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 07:36:23,373 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:36:23,459 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:36:23,460 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:36:23,535 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:36:23,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753839994] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:36:23,537 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:36:23,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2023-11-19 07:36:23,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316076593] [2023-11-19 07:36:23,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:36:23,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-19 07:36:23,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:36:23,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-19 07:36:23,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-19 07:36:23,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 314 [2023-11-19 07:36:23,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 38 transitions, 122 flow. Second operand has 10 states, 10 states have (on average 150.6) internal successors, (1506), 10 states have internal predecessors, (1506), 0 states have call successors, (0), 0 states 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 07:36:23,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:36:23,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 314 [2023-11-19 07:36:23,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:36:24,567 INFO L124 PetriNetUnfolderBase]: 1815/2998 cut-off events. [2023-11-19 07:36:24,567 INFO L125 PetriNetUnfolderBase]: For 1081/1081 co-relation queries the response was YES. [2023-11-19 07:36:24,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7071 conditions, 2998 events. 1815/2998 cut-off events. For 1081/1081 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 14190 event pairs, 349 based on Foata normal form. 48/2734 useless extension candidates. Maximal degree in co-relation 6600. Up to 844 conditions per place. [2023-11-19 07:36:24,597 INFO L140 encePairwiseOnDemand]: 308/314 looper letters, 164 selfloop transitions, 22 changer transitions 0/187 dead transitions. [2023-11-19 07:36:24,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 187 transitions, 900 flow [2023-11-19 07:36:24,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-19 07:36:24,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-19 07:36:24,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1655 transitions. [2023-11-19 07:36:24,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5270700636942676 [2023-11-19 07:36:24,606 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1655 transitions. [2023-11-19 07:36:24,606 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1655 transitions. [2023-11-19 07:36:24,608 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:36:24,608 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1655 transitions. [2023-11-19 07:36:24,615 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 165.5) internal successors, (1655), 10 states have internal predecessors, (1655), 0 states have call successors, (0), 0 states 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 07:36:24,625 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 314.0) internal successors, (3454), 11 states have internal predecessors, (3454), 0 states have call successors, (0), 0 states 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 07:36:24,628 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 314.0) internal successors, (3454), 11 states have internal predecessors, (3454), 0 states have call successors, (0), 0 states 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 07:36:24,628 INFO L175 Difference]: Start difference. First operand has 39 places, 38 transitions, 122 flow. Second operand 10 states and 1655 transitions. [2023-11-19 07:36:24,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 187 transitions, 900 flow [2023-11-19 07:36:24,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 187 transitions, 887 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:36:24,640 INFO L231 Difference]: Finished difference. Result has 51 places, 56 transitions, 280 flow [2023-11-19 07:36:24,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=280, PETRI_PLACES=51, PETRI_TRANSITIONS=56} [2023-11-19 07:36:24,642 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 16 predicate places. [2023-11-19 07:36:24,642 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 56 transitions, 280 flow [2023-11-19 07:36:24,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 150.6) internal successors, (1506), 10 states have internal predecessors, (1506), 0 states have call successors, (0), 0 states 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 07:36:24,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:36:24,644 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:36:24,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba371fd1-0e16-4525-90e6-dd6a30f0b35d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:36:24,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba371fd1-0e16-4525-90e6-dd6a30f0b35d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:36:24,858 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-19 07:36:24,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:24,859 INFO L85 PathProgramCache]: Analyzing trace with hash 1836347733, now seen corresponding path program 1 times [2023-11-19 07:36:24,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:24,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766214362] [2023-11-19 07:36:24,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:24,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:24,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:24,987 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 07:36:24,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:36:24,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766214362] [2023-11-19 07:36:24,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766214362] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:36:24,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:36:24,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:36:24,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996364569] [2023-11-19 07:36:24,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:36:24,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:36:24,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:36:24,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:36:24,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:36:25,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 314 [2023-11-19 07:36:25,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 56 transitions, 280 flow. Second operand has 3 states, 3 states have (on average 154.33333333333334) internal successors, (463), 3 states have internal predecessors, (463), 0 states have call successors, (0), 0 states 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 07:36:25,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:36:25,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 314 [2023-11-19 07:36:25,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:36:25,238 INFO L124 PetriNetUnfolderBase]: 573/1102 cut-off events. [2023-11-19 07:36:25,239 INFO L125 PetriNetUnfolderBase]: For 410/410 co-relation queries the response was YES. [2023-11-19 07:36:25,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2672 conditions, 1102 events. 573/1102 cut-off events. For 410/410 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 4840 event pairs, 98 based on Foata normal form. 0/1022 useless extension candidates. Maximal degree in co-relation 2202. Up to 785 conditions per place. [2023-11-19 07:36:25,251 INFO L140 encePairwiseOnDemand]: 309/314 looper letters, 46 selfloop transitions, 5 changer transitions 0/55 dead transitions. [2023-11-19 07:36:25,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 55 transitions, 329 flow [2023-11-19 07:36:25,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:36:25,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:36:25,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 489 transitions. [2023-11-19 07:36:25,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5191082802547771 [2023-11-19 07:36:25,255 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 489 transitions. [2023-11-19 07:36:25,255 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 489 transitions. [2023-11-19 07:36:25,256 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:36:25,256 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 489 transitions. [2023-11-19 07:36:25,258 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 states 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 07:36:25,261 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states 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 07:36:25,262 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states 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 07:36:25,262 INFO L175 Difference]: Start difference. First operand has 51 places, 56 transitions, 280 flow. Second operand 3 states and 489 transitions. [2023-11-19 07:36:25,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 55 transitions, 329 flow [2023-11-19 07:36:25,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 55 transitions, 317 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-11-19 07:36:25,269 INFO L231 Difference]: Finished difference. Result has 49 places, 46 transitions, 204 flow [2023-11-19 07:36:25,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=204, PETRI_PLACES=49, PETRI_TRANSITIONS=46} [2023-11-19 07:36:25,270 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 14 predicate places. [2023-11-19 07:36:25,271 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 46 transitions, 204 flow [2023-11-19 07:36:25,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 154.33333333333334) internal successors, (463), 3 states have internal predecessors, (463), 0 states have call successors, (0), 0 states 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 07:36:25,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:36:25,272 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:36:25,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 07:36:25,272 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-19 07:36:25,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:25,273 INFO L85 PathProgramCache]: Analyzing trace with hash -483208085, now seen corresponding path program 1 times [2023-11-19 07:36:25,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:25,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644396549] [2023-11-19 07:36:25,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:25,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:25,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:25,427 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 07:36:25,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:36:25,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644396549] [2023-11-19 07:36:25,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644396549] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:36:25,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:36:25,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:36:25,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505734159] [2023-11-19 07:36:25,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:36:25,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:36:25,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:36:25,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:36:25,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:36:25,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 314 [2023-11-19 07:36:25,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 46 transitions, 204 flow. Second operand has 5 states, 5 states have (on average 150.6) internal successors, (753), 5 states have internal predecessors, (753), 0 states have call successors, (0), 0 states 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 07:36:25,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:36:25,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 314 [2023-11-19 07:36:25,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:36:25,797 INFO L124 PetriNetUnfolderBase]: 727/1350 cut-off events. [2023-11-19 07:36:25,797 INFO L125 PetriNetUnfolderBase]: For 422/422 co-relation queries the response was YES. [2023-11-19 07:36:25,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3420 conditions, 1350 events. 727/1350 cut-off events. For 422/422 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 5700 event pairs, 207 based on Foata normal form. 12/1362 useless extension candidates. Maximal degree in co-relation 2802. Up to 529 conditions per place. [2023-11-19 07:36:25,812 INFO L140 encePairwiseOnDemand]: 308/314 looper letters, 80 selfloop transitions, 11 changer transitions 0/92 dead transitions. [2023-11-19 07:36:25,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 92 transitions, 526 flow [2023-11-19 07:36:25,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:36:25,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:36:25,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 819 transitions. [2023-11-19 07:36:25,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.521656050955414 [2023-11-19 07:36:25,818 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 819 transitions. [2023-11-19 07:36:25,818 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 819 transitions. [2023-11-19 07:36:25,819 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:36:25,820 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 819 transitions. [2023-11-19 07:36:25,823 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 163.8) internal successors, (819), 5 states have internal predecessors, (819), 0 states have call successors, (0), 0 states 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 07:36:25,827 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 314.0) internal successors, (1884), 6 states have internal predecessors, (1884), 0 states have call successors, (0), 0 states 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 07:36:25,828 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 314.0) internal successors, (1884), 6 states have internal predecessors, (1884), 0 states have call successors, (0), 0 states 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 07:36:25,829 INFO L175 Difference]: Start difference. First operand has 49 places, 46 transitions, 204 flow. Second operand 5 states and 819 transitions. [2023-11-19 07:36:25,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 92 transitions, 526 flow [2023-11-19 07:36:25,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 92 transitions, 513 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:36:25,836 INFO L231 Difference]: Finished difference. Result has 54 places, 48 transitions, 258 flow [2023-11-19 07:36:25,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=258, PETRI_PLACES=54, PETRI_TRANSITIONS=48} [2023-11-19 07:36:25,837 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 19 predicate places. [2023-11-19 07:36:25,838 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 48 transitions, 258 flow [2023-11-19 07:36:25,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 150.6) internal successors, (753), 5 states have internal predecessors, (753), 0 states have call successors, (0), 0 states 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 07:36:25,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:36:25,839 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 07:36:25,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 07:36:25,839 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-19 07:36:25,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:25,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1408695210, now seen corresponding path program 1 times [2023-11-19 07:36:25,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:25,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391209698] [2023-11-19 07:36:25,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:25,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:25,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:26,933 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 07:36:26,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:36:26,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391209698] [2023-11-19 07:36:26,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391209698] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:36:26,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:36:26,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-11-19 07:36:26,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753846923] [2023-11-19 07:36:26,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:36:26,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-19 07:36:26,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:36:26,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-19 07:36:26,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2023-11-19 07:36:28,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 314 [2023-11-19 07:36:28,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 48 transitions, 258 flow. Second operand has 14 states, 14 states have (on average 120.57142857142857) internal successors, (1688), 14 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states 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 07:36:28,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:36:28,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 314 [2023-11-19 07:36:28,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:36:29,806 INFO L124 PetriNetUnfolderBase]: 857/1593 cut-off events. [2023-11-19 07:36:29,806 INFO L125 PetriNetUnfolderBase]: For 817/817 co-relation queries the response was YES. [2023-11-19 07:36:29,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4104 conditions, 1593 events. 857/1593 cut-off events. For 817/817 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 7038 event pairs, 169 based on Foata normal form. 0/1581 useless extension candidates. Maximal degree in co-relation 2772. Up to 994 conditions per place. [2023-11-19 07:36:29,824 INFO L140 encePairwiseOnDemand]: 298/314 looper letters, 113 selfloop transitions, 30 changer transitions 1/145 dead transitions. [2023-11-19 07:36:29,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 145 transitions, 820 flow [2023-11-19 07:36:29,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-19 07:36:29,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-19 07:36:29,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2394 transitions. [2023-11-19 07:36:29,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4012738853503185 [2023-11-19 07:36:29,890 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2394 transitions. [2023-11-19 07:36:29,890 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2394 transitions. [2023-11-19 07:36:29,894 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:36:29,894 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2394 transitions. [2023-11-19 07:36:29,904 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 126.0) internal successors, (2394), 19 states have internal predecessors, (2394), 0 states have call successors, (0), 0 states 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 07:36:29,920 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 314.0) internal successors, (6280), 20 states have internal predecessors, (6280), 0 states have call successors, (0), 0 states 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 07:36:29,924 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 314.0) internal successors, (6280), 20 states have internal predecessors, (6280), 0 states have call successors, (0), 0 states 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 07:36:29,925 INFO L175 Difference]: Start difference. First operand has 54 places, 48 transitions, 258 flow. Second operand 19 states and 2394 transitions. [2023-11-19 07:36:29,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 145 transitions, 820 flow [2023-11-19 07:36:29,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 145 transitions, 803 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-11-19 07:36:29,937 INFO L231 Difference]: Finished difference. Result has 82 places, 73 transitions, 464 flow [2023-11-19 07:36:29,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=464, PETRI_PLACES=82, PETRI_TRANSITIONS=73} [2023-11-19 07:36:29,939 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 47 predicate places. [2023-11-19 07:36:29,939 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 73 transitions, 464 flow [2023-11-19 07:36:29,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 120.57142857142857) internal successors, (1688), 14 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states 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 07:36:29,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:36:29,942 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 07:36:29,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 07:36:29,943 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-19 07:36:29,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:29,944 INFO L85 PathProgramCache]: Analyzing trace with hash 808665518, now seen corresponding path program 2 times [2023-11-19 07:36:29,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:29,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395025025] [2023-11-19 07:36:29,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:29,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:30,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:31,125 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 07:36:31,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:36:31,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395025025] [2023-11-19 07:36:31,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395025025] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:36:31,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:36:31,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-11-19 07:36:31,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540694663] [2023-11-19 07:36:31,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:36:31,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-19 07:36:31,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:36:31,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-19 07:36:31,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2023-11-19 07:36:32,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 314 [2023-11-19 07:36:32,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 73 transitions, 464 flow. Second operand has 15 states, 15 states have (on average 116.46666666666667) internal successors, (1747), 15 states have internal predecessors, (1747), 0 states have call successors, (0), 0 states 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 07:36:32,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:36:32,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 314 [2023-11-19 07:36:32,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:36:33,989 INFO L124 PetriNetUnfolderBase]: 1051/1962 cut-off events. [2023-11-19 07:36:33,990 INFO L125 PetriNetUnfolderBase]: For 1505/1505 co-relation queries the response was YES. [2023-11-19 07:36:34,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5781 conditions, 1962 events. 1051/1962 cut-off events. For 1505/1505 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 8936 event pairs, 243 based on Foata normal form. 0/1950 useless extension candidates. Maximal degree in co-relation 4564. Up to 1316 conditions per place. [2023-11-19 07:36:34,017 INFO L140 encePairwiseOnDemand]: 299/314 looper letters, 119 selfloop transitions, 30 changer transitions 3/153 dead transitions. [2023-11-19 07:36:34,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 153 transitions, 1060 flow [2023-11-19 07:36:34,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-19 07:36:34,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-19 07:36:34,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1607 transitions. [2023-11-19 07:36:34,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3936795688388045 [2023-11-19 07:36:34,027 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1607 transitions. [2023-11-19 07:36:34,027 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1607 transitions. [2023-11-19 07:36:34,028 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:36:34,029 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1607 transitions. [2023-11-19 07:36:34,034 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 123.61538461538461) internal successors, (1607), 13 states have internal predecessors, (1607), 0 states have call successors, (0), 0 states 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 07:36:34,043 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 314.0) internal successors, (4396), 14 states have internal predecessors, (4396), 0 states have call successors, (0), 0 states 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 07:36:34,045 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 314.0) internal successors, (4396), 14 states have internal predecessors, (4396), 0 states have call successors, (0), 0 states 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 07:36:34,046 INFO L175 Difference]: Start difference. First operand has 82 places, 73 transitions, 464 flow. Second operand 13 states and 1607 transitions. [2023-11-19 07:36:34,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 153 transitions, 1060 flow [2023-11-19 07:36:34,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 153 transitions, 1060 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 07:36:34,062 INFO L231 Difference]: Finished difference. Result has 105 places, 93 transitions, 751 flow [2023-11-19 07:36:34,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=464, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=751, PETRI_PLACES=105, PETRI_TRANSITIONS=93} [2023-11-19 07:36:34,067 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 70 predicate places. [2023-11-19 07:36:34,067 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 93 transitions, 751 flow [2023-11-19 07:36:34,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 116.46666666666667) internal successors, (1747), 15 states have internal predecessors, (1747), 0 states have call successors, (0), 0 states 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 07:36:34,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:36:34,069 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 07:36:34,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-19 07:36:34,073 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-19 07:36:34,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:34,074 INFO L85 PathProgramCache]: Analyzing trace with hash 1264659998, now seen corresponding path program 3 times [2023-11-19 07:36:34,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:34,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030160962] [2023-11-19 07:36:34,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:34,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:34,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:35,417 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 07:36:35,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:36:35,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030160962] [2023-11-19 07:36:35,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030160962] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:36:35,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:36:35,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-11-19 07:36:35,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66990234] [2023-11-19 07:36:35,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:36:35,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-19 07:36:35,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:36:35,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-19 07:36:35,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2023-11-19 07:36:37,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 314 [2023-11-19 07:36:37,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 93 transitions, 751 flow. Second operand has 15 states, 15 states have (on average 117.46666666666667) internal successors, (1762), 15 states have internal predecessors, (1762), 0 states have call successors, (0), 0 states 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 07:36:37,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:36:37,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 314 [2023-11-19 07:36:37,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:36:38,312 INFO L124 PetriNetUnfolderBase]: 1069/1998 cut-off events. [2023-11-19 07:36:38,312 INFO L125 PetriNetUnfolderBase]: For 2198/2198 co-relation queries the response was YES. [2023-11-19 07:36:38,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6417 conditions, 1998 events. 1069/1998 cut-off events. For 2198/2198 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 9074 event pairs, 227 based on Foata normal form. 0/1986 useless extension candidates. Maximal degree in co-relation 4762. Up to 1147 conditions per place. [2023-11-19 07:36:38,335 INFO L140 encePairwiseOnDemand]: 300/314 looper letters, 118 selfloop transitions, 36 changer transitions 3/158 dead transitions. [2023-11-19 07:36:38,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 158 transitions, 1259 flow [2023-11-19 07:36:38,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-19 07:36:38,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-19 07:36:38,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1620 transitions. [2023-11-19 07:36:38,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968642822146007 [2023-11-19 07:36:38,344 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1620 transitions. [2023-11-19 07:36:38,345 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1620 transitions. [2023-11-19 07:36:38,346 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:36:38,346 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1620 transitions. [2023-11-19 07:36:38,351 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 124.61538461538461) internal successors, (1620), 13 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states 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 07:36:38,358 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 314.0) internal successors, (4396), 14 states have internal predecessors, (4396), 0 states have call successors, (0), 0 states 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 07:36:38,359 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 314.0) internal successors, (4396), 14 states have internal predecessors, (4396), 0 states have call successors, (0), 0 states 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 07:36:38,360 INFO L175 Difference]: Start difference. First operand has 105 places, 93 transitions, 751 flow. Second operand 13 states and 1620 transitions. [2023-11-19 07:36:38,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 158 transitions, 1259 flow [2023-11-19 07:36:38,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 158 transitions, 1237 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-19 07:36:38,386 INFO L231 Difference]: Finished difference. Result has 119 places, 99 transitions, 887 flow [2023-11-19 07:36:38,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=729, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=887, PETRI_PLACES=119, PETRI_TRANSITIONS=99} [2023-11-19 07:36:38,389 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 84 predicate places. [2023-11-19 07:36:38,389 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 99 transitions, 887 flow [2023-11-19 07:36:38,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 117.46666666666667) internal successors, (1762), 15 states have internal predecessors, (1762), 0 states have call successors, (0), 0 states 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 07:36:38,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:36:38,390 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:36:38,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-19 07:36:38,391 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-19 07:36:38,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:38,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1735374477, now seen corresponding path program 1 times [2023-11-19 07:36:38,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:38,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604032213] [2023-11-19 07:36:38,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:38,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:38,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:38,529 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:36:38,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:36:38,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604032213] [2023-11-19 07:36:38,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604032213] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:36:38,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809830128] [2023-11-19 07:36:38,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:38,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:36:38,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba371fd1-0e16-4525-90e6-dd6a30f0b35d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:36:38,531 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba371fd1-0e16-4525-90e6-dd6a30f0b35d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:36:38,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba371fd1-0e16-4525-90e6-dd6a30f0b35d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:36:38,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:38,660 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:36:38,663 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:36:38,710 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:36:38,710 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:36:38,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809830128] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:36:38,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:36:38,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2023-11-19 07:36:38,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073620239] [2023-11-19 07:36:38,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:36:38,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:36:38,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:36:38,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:36:38,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:36:38,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 314 [2023-11-19 07:36:38,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 99 transitions, 887 flow. Second operand has 6 states, 6 states have (on average 147.0) internal successors, (882), 6 states have internal predecessors, (882), 0 states have call successors, (0), 0 states 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 07:36:38,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:36:38,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 314 [2023-11-19 07:36:38,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:36:39,371 INFO L124 PetriNetUnfolderBase]: 1245/2326 cut-off events. [2023-11-19 07:36:39,372 INFO L125 PetriNetUnfolderBase]: For 3875/3875 co-relation queries the response was YES. [2023-11-19 07:36:39,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7807 conditions, 2326 events. 1245/2326 cut-off events. For 3875/3875 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 10969 event pairs, 440 based on Foata normal form. 8/2316 useless extension candidates. Maximal degree in co-relation 5415. Up to 763 conditions per place. [2023-11-19 07:36:39,407 INFO L140 encePairwiseOnDemand]: 307/314 looper letters, 128 selfloop transitions, 29 changer transitions 0/158 dead transitions. [2023-11-19 07:36:39,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 158 transitions, 1489 flow [2023-11-19 07:36:39,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 07:36:39,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-19 07:36:39,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1096 transitions. [2023-11-19 07:36:39,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4986351228389445 [2023-11-19 07:36:39,412 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1096 transitions. [2023-11-19 07:36:39,412 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1096 transitions. [2023-11-19 07:36:39,413 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:36:39,413 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1096 transitions. [2023-11-19 07:36:39,416 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 156.57142857142858) internal successors, (1096), 7 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states 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 07:36:39,421 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 314.0) internal successors, (2512), 8 states have internal predecessors, (2512), 0 states have call successors, (0), 0 states 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 07:36:39,422 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 314.0) internal successors, (2512), 8 states have internal predecessors, (2512), 0 states have call successors, (0), 0 states 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 07:36:39,422 INFO L175 Difference]: Start difference. First operand has 119 places, 99 transitions, 887 flow. Second operand 7 states and 1096 transitions. [2023-11-19 07:36:39,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 158 transitions, 1489 flow [2023-11-19 07:36:39,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 158 transitions, 1456 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-19 07:36:39,446 INFO L231 Difference]: Finished difference. Result has 121 places, 108 transitions, 1040 flow [2023-11-19 07:36:39,447 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=854, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1040, PETRI_PLACES=121, PETRI_TRANSITIONS=108} [2023-11-19 07:36:39,448 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 86 predicate places. [2023-11-19 07:36:39,448 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 108 transitions, 1040 flow [2023-11-19 07:36:39,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 147.0) internal successors, (882), 6 states have internal predecessors, (882), 0 states have call successors, (0), 0 states 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 07:36:39,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:36:39,466 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 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 07:36:39,492 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba371fd1-0e16-4525-90e6-dd6a30f0b35d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:36:39,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba371fd1-0e16-4525-90e6-dd6a30f0b35d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-19 07:36:39,667 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-19 07:36:39,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:39,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1165794927, now seen corresponding path program 1 times [2023-11-19 07:36:39,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:39,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680737529] [2023-11-19 07:36:39,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:39,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:39,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:36:39,700 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:36:39,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:36:39,759 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:36:39,759 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 07:36:39,761 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 6 remaining) [2023-11-19 07:36:39,768 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 6 remaining) [2023-11-19 07:36:39,769 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 6 remaining) [2023-11-19 07:36:39,769 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-11-19 07:36:39,769 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-11-19 07:36:39,769 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-11-19 07:36:39,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-19 07:36:39,770 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:36:39,777 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-19 07:36:39,777 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-19 07:36:39,846 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~pre46 could not be translated [2023-11-19 07:36:39,848 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~pre48 could not be translated [2023-11-19 07:36:39,864 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 07:36:39 BasicIcfg [2023-11-19 07:36:39,865 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-19 07:36:39,865 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-19 07:36:39,866 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-19 07:36:39,866 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-19 07:36:39,866 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:36:14" (3/4) ... [2023-11-19 07:36:39,867 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-11-19 07:36:39,899 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~pre46 could not be translated [2023-11-19 07:36:39,907 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~pre48 could not be translated [2023-11-19 07:36:39,955 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba371fd1-0e16-4525-90e6-dd6a30f0b35d/bin/uautomizer-verify-uCwYo4JHxu/witness.graphml [2023-11-19 07:36:39,955 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-19 07:36:39,956 INFO L158 Benchmark]: Toolchain (without parser) took 27075.77ms. Allocated memory was 176.2MB in the beginning and 371.2MB in the end (delta: 195.0MB). Free memory was 104.5MB in the beginning and 245.3MB in the end (delta: -140.8MB). Peak memory consumption was 56.1MB. Max. memory is 16.1GB. [2023-11-19 07:36:39,957 INFO L158 Benchmark]: CDTParser took 0.34ms. Allocated memory is still 176.2MB. Free memory is still 146.8MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-19 07:36:39,957 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1044.95ms. Allocated memory is still 176.2MB. Free memory was 104.3MB in the beginning and 126.6MB in the end (delta: -22.3MB). Peak memory consumption was 9.4MB. Max. memory is 16.1GB. [2023-11-19 07:36:39,958 INFO L158 Benchmark]: Boogie Procedure Inliner took 83.19ms. Allocated memory is still 176.2MB. Free memory was 126.6MB in the beginning and 123.9MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-19 07:36:39,958 INFO L158 Benchmark]: Boogie Preprocessor took 67.02ms. Allocated memory is still 176.2MB. Free memory was 123.9MB in the beginning and 121.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-19 07:36:39,958 INFO L158 Benchmark]: RCFGBuilder took 636.39ms. Allocated memory is still 176.2MB. Free memory was 121.8MB in the beginning and 104.1MB in the end (delta: 17.7MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2023-11-19 07:36:39,959 INFO L158 Benchmark]: TraceAbstraction took 25137.74ms. Allocated memory was 176.2MB in the beginning and 371.2MB in the end (delta: 195.0MB). Free memory was 103.5MB in the beginning and 253.7MB in the end (delta: -150.2MB). Peak memory consumption was 46.5MB. Max. memory is 16.1GB. [2023-11-19 07:36:39,960 INFO L158 Benchmark]: Witness Printer took 90.20ms. Allocated memory is still 371.2MB. Free memory was 253.7MB in the beginning and 245.3MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-11-19 07:36:39,962 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34ms. Allocated memory is still 176.2MB. Free memory is still 146.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1044.95ms. Allocated memory is still 176.2MB. Free memory was 104.3MB in the beginning and 126.6MB in the end (delta: -22.3MB). Peak memory consumption was 9.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 83.19ms. Allocated memory is still 176.2MB. Free memory was 126.6MB in the beginning and 123.9MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 67.02ms. Allocated memory is still 176.2MB. Free memory was 123.9MB in the beginning and 121.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 636.39ms. Allocated memory is still 176.2MB. Free memory was 121.8MB in the beginning and 104.1MB in the end (delta: 17.7MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 25137.74ms. Allocated memory was 176.2MB in the beginning and 371.2MB in the end (delta: 195.0MB). Free memory was 103.5MB in the beginning and 253.7MB in the end (delta: -150.2MB). Peak memory consumption was 46.5MB. Max. memory is 16.1GB. * Witness Printer took 90.20ms. Allocated memory is still 371.2MB. Free memory was 253.7MB in the beginning and 245.3MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~pre46 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~pre48 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~pre46 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~pre48 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 5.7s, 151 PlacesBefore, 35 PlacesAfterwards, 154 TransitionsBefore, 33 TransitionsAfterwards, 8340 CoEnabledTransitionPairs, 6 FixpointIterations, 25 TrivialSequentialCompositions, 98 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 20 ConcurrentYvCompositions, 5 ChoiceCompositions, 148 TotalNumberOfCompositions, 10950 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 8703, independent: 8519, independent conditional: 0, independent unconditional: 8519, dependent: 184, dependent conditional: 0, dependent unconditional: 184, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 4801, independent: 4745, independent conditional: 0, independent unconditional: 4745, dependent: 56, dependent conditional: 0, dependent unconditional: 56, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 8703, independent: 3774, independent conditional: 0, independent unconditional: 3774, dependent: 128, dependent conditional: 0, dependent unconditional: 128, unknown: 4801, unknown conditional: 0, unknown unconditional: 4801] , Statistics on independence cache: Total cache size (in pairs): 198, Positive cache size: 181, Positive conditional cache size: 0, Positive unconditional cache size: 181, Negative cache size: 17, Negative conditional cache size: 0, Negative unconditional cache size: 17, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - CounterExampleResult [Line: 941]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L935] 0 static int top=0; [L936] 0 static unsigned int arr[(800)]; [L937] 0 pthread_mutex_t m; [L938] 0 _Bool flag=(0); [L1020] 0 pthread_t id1, id2; [L1022] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arr={3:0}, flag=0, id1={6:0}, id2={5:0}, m={4:0}, top=0] [L989] 1 int i; [L990] 1 unsigned int tmp; [L991] 1 i=0 VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, top=0] [L1023] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arr={3:0}, flag=0, id1={6:0}, id2={5:0}, m={4:0}, top=0] [L991] COND TRUE 1 i<(800) [L994] 1 tmp = __VERIFIER_nondet_uint() [L995] CALL 1 assume_abort_if_not(tmp < (800)) [L23] COND FALSE 1 !(!cond) [L995] RET 1 assume_abort_if_not(tmp < (800)) [L996] CALL, EXPR 1 push(arr,tmp) [L1005] 2 int i; [L1006] 2 i=0 VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, top=0] [L961] COND FALSE 1 !(top==(800)) [L968] CALL, EXPR 1 get_top() [L953] 1 return top; [L968] RET, EXPR 1 get_top() [L968] 1 stack[get_top()] = x [L969] CALL 1 inc_top() [L945] 1 top++ [L969] RET 1 inc_top() [L971] 1 return 0; [L996] RET, EXPR 1 push(arr,tmp) [L996] COND FALSE 1 !(push(arr,tmp)==(-1)) [L998] 1 flag=(1) VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=0, m={4:0}, tmp=0, top=1] [L991] 1 i++ VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, tmp=0, top=1] [L1006] COND TRUE 2 i<(800) [L1009] COND TRUE 2 \read(flag) [L1011] CALL, EXPR 2 pop(arr) [L975] CALL, EXPR 2 get_top() [L953] 2 return top; [L975] RET, EXPR 2 get_top() [L975] COND FALSE 2 !(get_top()==0) [L982] CALL 2 dec_top() [L949] 2 top-- VAL [arr={3:0}, flag=1, m={4:0}, top=0] [L982] RET 2 dec_top() [L983] CALL, EXPR 2 get_top() [L953] 2 return top; VAL [\result=0, \result=0, arr={3:0}, flag=1, m={4:0}, top=0] [L983] RET, EXPR 2 get_top() [L983] EXPR 2 stack[get_top()] [L983] 2 return stack[get_top()]; [L1011] RET, EXPR 2 pop(arr) [L1011] COND FALSE 2 !(!(pop(arr)!=(-2))) [L1006] 2 i++ VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, top=0] [L1006] COND TRUE 2 i<(800) [L1009] COND TRUE 2 \read(flag) [L1011] CALL, EXPR 2 pop(arr) [L975] CALL, EXPR 2 get_top() [L953] 2 return top; [L975] RET, EXPR 2 get_top() [L975] COND TRUE 2 get_top()==0 [L978] 2 return (-2); [L1011] RET, EXPR 2 pop(arr) [L1011] COND TRUE 2 !(pop(arr)!=(-2)) [L1012] CALL 2 error() [L941] 2 reach_error() VAL [arr={3:0}, flag=1, m={4:0}, top=0] - UnprovableResult [Line: 1023]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - UnprovableResult [Line: 1022]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - UnprovableResult [Line: 941]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 266 locations, 6 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 24.8s, OverallIterations: 11, TraceHistogramMax: 2, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 12.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 5.9s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2074 SdHoareTripleChecker+Valid, 7.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1815 mSDsluCounter, 4366 SdHoareTripleChecker+Invalid, 6.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 4331 mSDsCounter, 81 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 9120 IncrementalHoareTripleChecker+Invalid, 9201 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 81 mSolverCounterUnsat, 35 mSDtfsCounter, 9120 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 146 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 2.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1040occurred in iteration=10, InterpolantAutomatonStates: 79, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 4.5s InterpolantComputationTime, 230 NumberOfCodeBlocks, 230 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 205 ConstructedInterpolants, 0 QuantifiedInterpolants, 1722 SizeOfPredicates, 3 NumberOfNonLiveVariables, 400 ConjunctsInSsa, 10 ConjunctsInUnsatCore, 13 InterpolantComputations, 9 PerfectInterpolantSequences, 7/15 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-11-19 07:36:40,001 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba371fd1-0e16-4525-90e6-dd6a30f0b35d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE