./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread/bigshot_s.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a340643f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/pthread/bigshot_s.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 4d8c741fd238f074816319de9a9bd5d97cd9b35eb7f53a276be973ea0c31ecbe --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a340643-m [2024-01-27 15:04:47,564 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-27 15:04:47,643 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-27 15:04:47,649 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-27 15:04:47,650 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-27 15:04:47,679 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-27 15:04:47,680 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-27 15:04:47,681 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-27 15:04:47,681 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-27 15:04:47,685 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-27 15:04:47,686 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-27 15:04:47,686 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-27 15:04:47,686 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-27 15:04:47,688 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-27 15:04:47,688 INFO L153 SettingsManager]: * Use SBE=true [2024-01-27 15:04:47,688 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-27 15:04:47,688 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-27 15:04:47,689 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-27 15:04:47,689 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-27 15:04:47,689 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-27 15:04:47,689 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-27 15:04:47,690 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-27 15:04:47,690 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-27 15:04:47,690 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-27 15:04:47,691 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-27 15:04:47,691 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-27 15:04:47,691 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-27 15:04:47,691 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-27 15:04:47,692 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-27 15:04:47,692 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-27 15:04:47,693 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-27 15:04:47,693 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-27 15:04:47,694 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:04:47,694 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-27 15:04:47,694 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-27 15:04:47,694 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-27 15:04:47,694 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-27 15:04:47,695 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-27 15:04:47,695 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-27 15:04:47,695 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-27 15:04:47,695 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-27 15:04:47,696 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-27 15:04:47,696 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-27 15:04:47,696 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4d8c741fd238f074816319de9a9bd5d97cd9b35eb7f53a276be973ea0c31ecbe [2024-01-27 15:04:47,995 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-27 15:04:48,022 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-27 15:04:48,024 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-27 15:04:48,025 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-27 15:04:48,026 INFO L274 PluginConnector]: CDTParser initialized [2024-01-27 15:04:48,027 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/bigshot_s.i [2024-01-27 15:04:49,204 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-27 15:04:49,492 INFO L384 CDTParser]: Found 1 translation units. [2024-01-27 15:04:49,492 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/bigshot_s.i [2024-01-27 15:04:49,521 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec5596153/88e74e195f58449a945eaae97d38c1ab/FLAG21e9c1977 [2024-01-27 15:04:49,533 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec5596153/88e74e195f58449a945eaae97d38c1ab [2024-01-27 15:04:49,536 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-27 15:04:49,537 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-01-27 15:04:49,538 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-27 15:04:49,538 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-27 15:04:49,543 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-27 15:04:49,543 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:04:49" (1/1) ... [2024-01-27 15:04:49,544 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a53572e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:04:49, skipping insertion in model container [2024-01-27 15:04:49,544 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:04:49" (1/1) ... [2024-01-27 15:04:49,613 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-01-27 15:04:50,049 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/bigshot_s.i[55202,55215] [2024-01-27 15:04:50,070 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:04:50,081 INFO L202 MainTranslator]: Completed pre-run [2024-01-27 15:04:50,115 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/bigshot_s.i[55202,55215] [2024-01-27 15:04:50,121 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:04:50,176 INFO L206 MainTranslator]: Completed translation [2024-01-27 15:04:50,176 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:04:50 WrapperNode [2024-01-27 15:04:50,176 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-27 15:04:50,177 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-27 15:04:50,177 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-27 15:04:50,177 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-27 15:04:50,182 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:04:50" (1/1) ... [2024-01-27 15:04:50,201 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:04:50" (1/1) ... [2024-01-27 15:04:50,222 INFO L138 Inliner]: procedures = 323, calls = 33, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 73 [2024-01-27 15:04:50,222 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-27 15:04:50,223 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-27 15:04:50,223 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-27 15:04:50,223 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-27 15:04:50,232 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:04:50" (1/1) ... [2024-01-27 15:04:50,232 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:04:50" (1/1) ... [2024-01-27 15:04:50,237 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:04:50" (1/1) ... [2024-01-27 15:04:50,265 INFO L175 MemorySlicer]: Split 17 memory accesses to 5 slices as follows [2, 9, 2, 2, 2]. 53 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8, 0, 0, 0]. The 3 writes are split as follows [0, 0, 1, 1, 1]. [2024-01-27 15:04:50,272 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:04:50" (1/1) ... [2024-01-27 15:04:50,272 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:04:50" (1/1) ... [2024-01-27 15:04:50,279 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:04:50" (1/1) ... [2024-01-27 15:04:50,291 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:04:50" (1/1) ... [2024-01-27 15:04:50,293 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:04:50" (1/1) ... [2024-01-27 15:04:50,307 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:04:50" (1/1) ... [2024-01-27 15:04:50,310 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-27 15:04:50,311 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-27 15:04:50,312 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-27 15:04:50,312 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-27 15:04:50,313 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:04:50" (1/1) ... [2024-01-27 15:04:50,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:04:50,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:04:50,353 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-01-27 15:04:50,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-01-27 15:04:50,421 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-27 15:04:50,421 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-27 15:04:50,422 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#0 [2024-01-27 15:04:50,422 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#1 [2024-01-27 15:04:50,422 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#2 [2024-01-27 15:04:50,422 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#3 [2024-01-27 15:04:50,424 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#4 [2024-01-27 15:04:50,424 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-27 15:04:50,424 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-27 15:04:50,425 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-27 15:04:50,425 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-01-27 15:04:50,425 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-01-27 15:04:50,425 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-01-27 15:04:50,425 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-01-27 15:04:50,425 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-01-27 15:04:50,425 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-01-27 15:04:50,426 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-27 15:04:50,426 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-27 15:04:50,426 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-27 15:04:50,427 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-01-27 15:04:50,427 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-01-27 15:04:50,428 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-01-27 15:04:50,428 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-27 15:04:50,428 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-27 15:04:50,429 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-27 15:04:50,429 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-27 15:04:50,429 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-01-27 15:04:50,429 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-01-27 15:04:50,430 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-27 15:04:50,430 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-27 15:04:50,432 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-01-27 15:04:50,594 INFO L244 CfgBuilder]: Building ICFG [2024-01-27 15:04:50,596 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-27 15:04:50,790 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-27 15:04:50,791 INFO L293 CfgBuilder]: Performing block encoding [2024-01-27 15:04:50,905 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-27 15:04:50,905 INFO L320 CfgBuilder]: Removed 1 assume(true) statements. [2024-01-27 15:04:50,905 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:04:50 BoogieIcfgContainer [2024-01-27 15:04:50,906 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-27 15:04:50,907 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-27 15:04:50,908 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-27 15:04:50,910 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-27 15:04:50,911 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 03:04:49" (1/3) ... [2024-01-27 15:04:50,911 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6198c5fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:04:50, skipping insertion in model container [2024-01-27 15:04:50,911 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:04:50" (2/3) ... [2024-01-27 15:04:50,912 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6198c5fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:04:50, skipping insertion in model container [2024-01-27 15:04:50,912 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:04:50" (3/3) ... [2024-01-27 15:04:50,913 INFO L112 eAbstractionObserver]: Analyzing ICFG bigshot_s.i [2024-01-27 15:04:50,921 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-01-27 15:04:50,930 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-27 15:04:50,930 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-01-27 15:04:50,930 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-27 15:04:50,987 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-01-27 15:04:51,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 29 places, 26 transitions, 66 flow [2024-01-27 15:04:51,054 INFO L124 PetriNetUnfolderBase]: 4/24 cut-off events. [2024-01-27 15:04:51,055 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-27 15:04:51,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33 conditions, 24 events. 4/24 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 16 event pairs, 0 based on Foata normal form. 0/19 useless extension candidates. Maximal degree in co-relation 22. Up to 2 conditions per place. [2024-01-27 15:04:51,058 INFO L82 GeneralOperation]: Start removeDead. Operand has 29 places, 26 transitions, 66 flow [2024-01-27 15:04:51,062 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 25 places, 21 transitions, 54 flow [2024-01-27 15:04:51,078 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 15:04:51,084 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;@68be2dbf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 15:04:51,084 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-01-27 15:04:51,091 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 15:04:51,092 INFO L124 PetriNetUnfolderBase]: 3/20 cut-off events. [2024-01-27 15:04:51,092 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-27 15:04:51,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:04:51,093 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:04:51,093 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:04:51,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:04:51,099 INFO L85 PathProgramCache]: Analyzing trace with hash 177314790, now seen corresponding path program 1 times [2024-01-27 15:04:51,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:04:51,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375892661] [2024-01-27 15:04:51,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:04:51,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:04:51,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:04:51,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:04:51,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:04:51,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375892661] [2024-01-27 15:04:51,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375892661] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:04:51,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:04:51,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 15:04:51,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493558261] [2024-01-27 15:04:51,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:04:51,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 15:04:51,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:04:51,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 15:04:51,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 15:04:51,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 26 [2024-01-27 15:04:51,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 21 transitions, 54 flow. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:04:51,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:04:51,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 26 [2024-01-27 15:04:51,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:04:51,562 INFO L124 PetriNetUnfolderBase]: 7/31 cut-off events. [2024-01-27 15:04:51,563 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-27 15:04:51,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67 conditions, 31 events. 7/31 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 19 event pairs, 4 based on Foata normal form. 0/30 useless extension candidates. Maximal degree in co-relation 46. Up to 23 conditions per place. [2024-01-27 15:04:51,565 INFO L140 encePairwiseOnDemand]: 23/26 looper letters, 15 selfloop transitions, 1 changer transitions 0/20 dead transitions. [2024-01-27 15:04:51,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 20 transitions, 84 flow [2024-01-27 15:04:51,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 15:04:51,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 15:04:51,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 39 transitions. [2024-01-27 15:04:51,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-01-27 15:04:51,579 INFO L175 Difference]: Start difference. First operand has 25 places, 21 transitions, 54 flow. Second operand 3 states and 39 transitions. [2024-01-27 15:04:51,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 20 transitions, 84 flow [2024-01-27 15:04:51,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 20 transitions, 76 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-01-27 15:04:51,587 INFO L231 Difference]: Finished difference. Result has 23 places, 19 transitions, 44 flow [2024-01-27 15:04:51,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=44, PETRI_PLACES=23, PETRI_TRANSITIONS=19} [2024-01-27 15:04:51,592 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, -2 predicate places. [2024-01-27 15:04:51,592 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 19 transitions, 44 flow [2024-01-27 15:04:51,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:04:51,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:04:51,593 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:04:51,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-27 15:04:51,594 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:04:51,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:04:51,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1734843846, now seen corresponding path program 1 times [2024-01-27 15:04:51,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:04:51,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391230111] [2024-01-27 15:04:51,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:04:51,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:04:51,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:04:52,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:04:52,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:04:52,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391230111] [2024-01-27 15:04:52,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391230111] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:04:52,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:04:52,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-01-27 15:04:52,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941085219] [2024-01-27 15:04:52,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:04:52,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-27 15:04:52,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:04:52,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-27 15:04:52,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-01-27 15:04:52,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 26 [2024-01-27 15:04:52,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 19 transitions, 44 flow. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:04:52,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:04:52,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 26 [2024-01-27 15:04:52,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:04:52,511 INFO L124 PetriNetUnfolderBase]: 12/49 cut-off events. [2024-01-27 15:04:52,511 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-01-27 15:04:52,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100 conditions, 49 events. 12/49 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 76 event pairs, 4 based on Foata normal form. 1/48 useless extension candidates. Maximal degree in co-relation 82. Up to 24 conditions per place. [2024-01-27 15:04:52,513 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 17 selfloop transitions, 6 changer transitions 4/30 dead transitions. [2024-01-27 15:04:52,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 30 transitions, 121 flow [2024-01-27 15:04:52,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-27 15:04:52,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-27 15:04:52,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 68 transitions. [2024-01-27 15:04:52,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3269230769230769 [2024-01-27 15:04:52,518 INFO L175 Difference]: Start difference. First operand has 23 places, 19 transitions, 44 flow. Second operand 8 states and 68 transitions. [2024-01-27 15:04:52,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 30 transitions, 121 flow [2024-01-27 15:04:52,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 30 transitions, 120 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-27 15:04:52,525 INFO L231 Difference]: Finished difference. Result has 32 places, 22 transitions, 75 flow [2024-01-27 15:04:52,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=43, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=75, PETRI_PLACES=32, PETRI_TRANSITIONS=22} [2024-01-27 15:04:52,526 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 7 predicate places. [2024-01-27 15:04:52,526 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 22 transitions, 75 flow [2024-01-27 15:04:52,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:04:52,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:04:52,527 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:04:52,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-27 15:04:52,533 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:04:52,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:04:52,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1521238415, now seen corresponding path program 1 times [2024-01-27 15:04:52,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:04:52,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269174029] [2024-01-27 15:04:52,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:04:52,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:04:52,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:04:52,801 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:04:52,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:04:52,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269174029] [2024-01-27 15:04:52,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269174029] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:04:52,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004783255] [2024-01-27 15:04:52,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:04:52,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:04:52,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:04:52,808 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:04:52,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-01-27 15:04:52,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:04:52,929 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 11 conjunts are in the unsatisfiable core [2024-01-27 15:04:52,933 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:04:53,057 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-01-27 15:04:53,072 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:04:53,072 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:04:53,136 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:04:53,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004783255] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:04:53,137 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:04:53,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2024-01-27 15:04:53,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531144653] [2024-01-27 15:04:53,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:04:53,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-01-27 15:04:53,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:04:53,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-01-27 15:04:53,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-01-27 15:04:53,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 26 [2024-01-27 15:04:53,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 22 transitions, 75 flow. Second operand has 14 states, 14 states have (on average 9.928571428571429) internal successors, (139), 14 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:04:53,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:04:53,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 26 [2024-01-27 15:04:53,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:04:53,307 INFO L124 PetriNetUnfolderBase]: 14/50 cut-off events. [2024-01-27 15:04:53,307 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-01-27 15:04:53,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134 conditions, 50 events. 14/50 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 50 event pairs, 6 based on Foata normal form. 2/51 useless extension candidates. Maximal degree in co-relation 125. Up to 29 conditions per place. [2024-01-27 15:04:53,308 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 19 selfloop transitions, 6 changer transitions 1/29 dead transitions. [2024-01-27 15:04:53,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 29 transitions, 145 flow [2024-01-27 15:04:53,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-27 15:04:53,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-27 15:04:53,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 76 transitions. [2024-01-27 15:04:53,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4175824175824176 [2024-01-27 15:04:53,310 INFO L175 Difference]: Start difference. First operand has 32 places, 22 transitions, 75 flow. Second operand 7 states and 76 transitions. [2024-01-27 15:04:53,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 29 transitions, 145 flow [2024-01-27 15:04:53,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 29 transitions, 136 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-01-27 15:04:53,312 INFO L231 Difference]: Finished difference. Result has 35 places, 24 transitions, 96 flow [2024-01-27 15:04:53,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=96, PETRI_PLACES=35, PETRI_TRANSITIONS=24} [2024-01-27 15:04:53,313 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 10 predicate places. [2024-01-27 15:04:53,313 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 24 transitions, 96 flow [2024-01-27 15:04:53,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.928571428571429) internal successors, (139), 14 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:04:53,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:04:53,314 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:04:53,334 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-01-27 15:04:53,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:04:53,528 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:04:53,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:04:53,529 INFO L85 PathProgramCache]: Analyzing trace with hash -961978128, now seen corresponding path program 2 times [2024-01-27 15:04:53,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:04:53,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098276433] [2024-01-27 15:04:53,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:04:53,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:04:53,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:04:53,741 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:04:53,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:04:53,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098276433] [2024-01-27 15:04:53,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098276433] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:04:53,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719145467] [2024-01-27 15:04:53,742 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:04:53,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:04:53,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:04:53,744 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:04:53,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-01-27 15:04:53,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:04:53,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:04:53,859 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 13 conjunts are in the unsatisfiable core [2024-01-27 15:04:53,861 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:04:53,957 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-01-27 15:04:53,969 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:04:53,970 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:04:54,044 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:04:54,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719145467] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:04:54,045 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:04:54,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2024-01-27 15:04:54,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428931533] [2024-01-27 15:04:54,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:04:54,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-01-27 15:04:54,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:04:54,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-01-27 15:04:54,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2024-01-27 15:04:54,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 26 [2024-01-27 15:04:54,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 24 transitions, 96 flow. Second operand has 17 states, 17 states have (on average 9.882352941176471) internal successors, (168), 17 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:04:54,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:04:54,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 26 [2024-01-27 15:04:54,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:04:54,293 INFO L124 PetriNetUnfolderBase]: 16/56 cut-off events. [2024-01-27 15:04:54,293 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-01-27 15:04:54,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172 conditions, 56 events. 16/56 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 56 event pairs, 6 based on Foata normal form. 2/57 useless extension candidates. Maximal degree in co-relation 148. Up to 29 conditions per place. [2024-01-27 15:04:54,295 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 21 selfloop transitions, 7 changer transitions 1/32 dead transitions. [2024-01-27 15:04:54,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 32 transitions, 180 flow [2024-01-27 15:04:54,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-27 15:04:54,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-27 15:04:54,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 86 transitions. [2024-01-27 15:04:54,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41346153846153844 [2024-01-27 15:04:54,297 INFO L175 Difference]: Start difference. First operand has 35 places, 24 transitions, 96 flow. Second operand 8 states and 86 transitions. [2024-01-27 15:04:54,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 32 transitions, 180 flow [2024-01-27 15:04:54,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 32 transitions, 168 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-01-27 15:04:54,299 INFO L231 Difference]: Finished difference. Result has 40 places, 26 transitions, 120 flow [2024-01-27 15:04:54,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=120, PETRI_PLACES=40, PETRI_TRANSITIONS=26} [2024-01-27 15:04:54,300 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 15 predicate places. [2024-01-27 15:04:54,300 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 26 transitions, 120 flow [2024-01-27 15:04:54,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 9.882352941176471) internal successors, (168), 17 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:04:54,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:04:54,301 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:04:54,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-01-27 15:04:54,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-01-27 15:04:54,517 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:04:54,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:04:54,518 INFO L85 PathProgramCache]: Analyzing trace with hash -11269107, now seen corresponding path program 3 times [2024-01-27 15:04:54,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:04:54,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997056025] [2024-01-27 15:04:54,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:04:54,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:04:54,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:04:54,744 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:04:54,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:04:54,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997056025] [2024-01-27 15:04:54,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997056025] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:04:54,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209238017] [2024-01-27 15:04:54,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:04:54,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:04:54,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:04:54,747 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:04:54,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-01-27 15:04:54,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-01-27 15:04:54,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:04:54,859 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 15 conjunts are in the unsatisfiable core [2024-01-27 15:04:54,862 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:04:54,990 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-01-27 15:04:55,001 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:04:55,002 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:04:55,087 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:04:55,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209238017] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:04:55,087 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:04:55,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2024-01-27 15:04:55,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804419882] [2024-01-27 15:04:55,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:04:55,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-01-27 15:04:55,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:04:55,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-01-27 15:04:55,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2024-01-27 15:04:55,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 26 [2024-01-27 15:04:55,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 26 transitions, 120 flow. Second operand has 20 states, 20 states have (on average 9.75) internal successors, (195), 20 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:04:55,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:04:55,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 26 [2024-01-27 15:04:55,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:04:55,332 INFO L124 PetriNetUnfolderBase]: 18/62 cut-off events. [2024-01-27 15:04:55,332 INFO L125 PetriNetUnfolderBase]: For 51/51 co-relation queries the response was YES. [2024-01-27 15:04:55,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 212 conditions, 62 events. 18/62 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 62 event pairs, 6 based on Foata normal form. 2/63 useless extension candidates. Maximal degree in co-relation 186. Up to 29 conditions per place. [2024-01-27 15:04:55,335 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 23 selfloop transitions, 8 changer transitions 1/35 dead transitions. [2024-01-27 15:04:55,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 35 transitions, 218 flow [2024-01-27 15:04:55,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-27 15:04:55,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-27 15:04:55,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 96 transitions. [2024-01-27 15:04:55,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41025641025641024 [2024-01-27 15:04:55,338 INFO L175 Difference]: Start difference. First operand has 40 places, 26 transitions, 120 flow. Second operand 9 states and 96 transitions. [2024-01-27 15:04:55,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 35 transitions, 218 flow [2024-01-27 15:04:55,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 35 transitions, 200 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-01-27 15:04:55,343 INFO L231 Difference]: Finished difference. Result has 45 places, 28 transitions, 144 flow [2024-01-27 15:04:55,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=144, PETRI_PLACES=45, PETRI_TRANSITIONS=28} [2024-01-27 15:04:55,345 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 20 predicate places. [2024-01-27 15:04:55,346 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 28 transitions, 144 flow [2024-01-27 15:04:55,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 9.75) internal successors, (195), 20 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:04:55,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:04:55,346 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:04:55,364 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-01-27 15:04:55,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:04:55,565 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:04:55,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:04:55,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1207933974, now seen corresponding path program 4 times [2024-01-27 15:04:55,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:04:55,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405513898] [2024-01-27 15:04:55,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:04:55,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:04:55,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:04:55,838 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:04:55,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:04:55,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405513898] [2024-01-27 15:04:55,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405513898] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:04:55,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901050200] [2024-01-27 15:04:55,839 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:04:55,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:04:55,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:04:55,840 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:04:55,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-01-27 15:04:55,944 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:04:55,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:04:55,946 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 17 conjunts are in the unsatisfiable core [2024-01-27 15:04:55,948 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:04:56,097 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-01-27 15:04:56,110 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:04:56,111 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:04:56,233 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:04:56,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901050200] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:04:56,234 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:04:56,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2024-01-27 15:04:56,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459755611] [2024-01-27 15:04:56,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:04:56,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-01-27 15:04:56,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:04:56,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-01-27 15:04:56,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2024-01-27 15:04:56,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 26 [2024-01-27 15:04:56,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 28 transitions, 144 flow. Second operand has 23 states, 23 states have (on average 9.652173913043478) internal successors, (222), 23 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:04:56,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:04:56,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 26 [2024-01-27 15:04:56,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:04:56,550 INFO L124 PetriNetUnfolderBase]: 20/68 cut-off events. [2024-01-27 15:04:56,550 INFO L125 PetriNetUnfolderBase]: For 101/101 co-relation queries the response was YES. [2024-01-27 15:04:56,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 252 conditions, 68 events. 20/68 cut-off events. For 101/101 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 68 event pairs, 6 based on Foata normal form. 2/69 useless extension candidates. Maximal degree in co-relation 224. Up to 29 conditions per place. [2024-01-27 15:04:56,551 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 25 selfloop transitions, 9 changer transitions 1/38 dead transitions. [2024-01-27 15:04:56,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 38 transitions, 256 flow [2024-01-27 15:04:56,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-27 15:04:56,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-27 15:04:56,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 106 transitions. [2024-01-27 15:04:56,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4076923076923077 [2024-01-27 15:04:56,553 INFO L175 Difference]: Start difference. First operand has 45 places, 28 transitions, 144 flow. Second operand 10 states and 106 transitions. [2024-01-27 15:04:56,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 38 transitions, 256 flow [2024-01-27 15:04:56,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 38 transitions, 232 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-01-27 15:04:56,555 INFO L231 Difference]: Finished difference. Result has 50 places, 30 transitions, 168 flow [2024-01-27 15:04:56,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=168, PETRI_PLACES=50, PETRI_TRANSITIONS=30} [2024-01-27 15:04:56,556 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 25 predicate places. [2024-01-27 15:04:56,556 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 30 transitions, 168 flow [2024-01-27 15:04:56,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 9.652173913043478) internal successors, (222), 23 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:04:56,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:04:56,557 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:04:56,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-01-27 15:04:56,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:04:56,758 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:04:56,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:04:56,758 INFO L85 PathProgramCache]: Analyzing trace with hash -151635833, now seen corresponding path program 5 times [2024-01-27 15:04:56,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:04:56,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339365493] [2024-01-27 15:04:56,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:04:56,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:04:56,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:04:57,028 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:04:57,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:04:57,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339365493] [2024-01-27 15:04:57,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339365493] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:04:57,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48149872] [2024-01-27 15:04:57,029 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:04:57,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:04:57,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:04:57,030 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:04:57,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-01-27 15:04:57,138 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-01-27 15:04:57,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:04:57,149 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 19 conjunts are in the unsatisfiable core [2024-01-27 15:04:57,150 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:04:57,345 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-01-27 15:04:57,363 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:04:57,364 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:04:57,496 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:04:57,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48149872] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:04:57,497 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:04:57,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2024-01-27 15:04:57,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326754304] [2024-01-27 15:04:57,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:04:57,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-01-27 15:04:57,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:04:57,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-01-27 15:04:57,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2024-01-27 15:04:57,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 26 [2024-01-27 15:04:57,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 30 transitions, 168 flow. Second operand has 26 states, 26 states have (on average 9.576923076923077) internal successors, (249), 26 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:04:57,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:04:57,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 26 [2024-01-27 15:04:57,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:04:57,883 INFO L124 PetriNetUnfolderBase]: 22/74 cut-off events. [2024-01-27 15:04:57,883 INFO L125 PetriNetUnfolderBase]: For 169/169 co-relation queries the response was YES. [2024-01-27 15:04:57,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 292 conditions, 74 events. 22/74 cut-off events. For 169/169 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 74 event pairs, 6 based on Foata normal form. 2/75 useless extension candidates. Maximal degree in co-relation 262. Up to 29 conditions per place. [2024-01-27 15:04:57,884 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 27 selfloop transitions, 10 changer transitions 1/41 dead transitions. [2024-01-27 15:04:57,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 41 transitions, 294 flow [2024-01-27 15:04:57,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-01-27 15:04:57,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-01-27 15:04:57,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 116 transitions. [2024-01-27 15:04:57,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40559440559440557 [2024-01-27 15:04:57,886 INFO L175 Difference]: Start difference. First operand has 50 places, 30 transitions, 168 flow. Second operand 11 states and 116 transitions. [2024-01-27 15:04:57,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 41 transitions, 294 flow [2024-01-27 15:04:57,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 41 transitions, 264 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-01-27 15:04:57,890 INFO L231 Difference]: Finished difference. Result has 55 places, 32 transitions, 192 flow [2024-01-27 15:04:57,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=192, PETRI_PLACES=55, PETRI_TRANSITIONS=32} [2024-01-27 15:04:57,891 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 30 predicate places. [2024-01-27 15:04:57,891 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 32 transitions, 192 flow [2024-01-27 15:04:57,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 9.576923076923077) internal successors, (249), 26 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:04:57,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:04:57,893 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:04:57,912 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-01-27 15:04:58,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:04:58,108 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:04:58,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:04:58,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1338595812, now seen corresponding path program 6 times [2024-01-27 15:04:58,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:04:58,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352284709] [2024-01-27 15:04:58,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:04:58,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:04:58,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:04:58,431 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:04:58,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:04:58,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352284709] [2024-01-27 15:04:58,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352284709] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:04:58,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32346030] [2024-01-27 15:04:58,432 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:04:58,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:04:58,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:04:58,434 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:04:58,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-01-27 15:04:58,573 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-01-27 15:04:58,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:04:58,575 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 21 conjunts are in the unsatisfiable core [2024-01-27 15:04:58,577 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:04:58,773 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-01-27 15:04:58,786 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:04:58,786 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:04:58,951 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:04:58,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32346030] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:04:58,951 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:04:58,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2024-01-27 15:04:58,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386498236] [2024-01-27 15:04:58,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:04:58,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-01-27 15:04:58,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:04:58,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-01-27 15:04:58,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2024-01-27 15:04:58,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 26 [2024-01-27 15:04:58,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 32 transitions, 192 flow. Second operand has 29 states, 29 states have (on average 9.517241379310345) internal successors, (276), 29 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:04:58,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:04:58,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 26 [2024-01-27 15:04:58,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:04:59,432 INFO L124 PetriNetUnfolderBase]: 24/80 cut-off events. [2024-01-27 15:04:59,432 INFO L125 PetriNetUnfolderBase]: For 255/255 co-relation queries the response was YES. [2024-01-27 15:04:59,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 332 conditions, 80 events. 24/80 cut-off events. For 255/255 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 78 event pairs, 6 based on Foata normal form. 2/81 useless extension candidates. Maximal degree in co-relation 300. Up to 29 conditions per place. [2024-01-27 15:04:59,433 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 29 selfloop transitions, 11 changer transitions 1/44 dead transitions. [2024-01-27 15:04:59,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 44 transitions, 332 flow [2024-01-27 15:04:59,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-27 15:04:59,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-27 15:04:59,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 126 transitions. [2024-01-27 15:04:59,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40384615384615385 [2024-01-27 15:04:59,436 INFO L175 Difference]: Start difference. First operand has 55 places, 32 transitions, 192 flow. Second operand 12 states and 126 transitions. [2024-01-27 15:04:59,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 44 transitions, 332 flow [2024-01-27 15:04:59,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 44 transitions, 296 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-01-27 15:04:59,438 INFO L231 Difference]: Finished difference. Result has 60 places, 34 transitions, 216 flow [2024-01-27 15:04:59,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=216, PETRI_PLACES=60, PETRI_TRANSITIONS=34} [2024-01-27 15:04:59,439 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 35 predicate places. [2024-01-27 15:04:59,439 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 34 transitions, 216 flow [2024-01-27 15:04:59,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 9.517241379310345) internal successors, (276), 29 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:04:59,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:04:59,440 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:04:59,458 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-01-27 15:04:59,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:04:59,655 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:04:59,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:04:59,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1067870207, now seen corresponding path program 7 times [2024-01-27 15:04:59,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:04:59,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791306360] [2024-01-27 15:04:59,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:04:59,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:04:59,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:05:01,009 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 20 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:05:01,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:05:01,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791306360] [2024-01-27 15:05:01,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791306360] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:05:01,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720943691] [2024-01-27 15:05:01,010 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:05:01,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:05:01,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:05:01,011 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:05:01,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-01-27 15:05:01,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:05:01,134 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 43 conjunts are in the unsatisfiable core [2024-01-27 15:05:01,138 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:05:01,215 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-01-27 15:05:01,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-27 15:05:01,276 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2024-01-27 15:05:01,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-27 15:05:01,323 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2024-01-27 15:05:01,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-27 15:05:01,374 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2024-01-27 15:05:01,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-27 15:05:01,423 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2024-01-27 15:05:01,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-27 15:05:01,474 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2024-01-27 15:05:01,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-27 15:05:01,527 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2024-01-27 15:05:01,582 INFO L349 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2024-01-27 15:05:01,583 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2024-01-27 15:05:01,623 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 36 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:05:01,623 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:09:46,802 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 412138 treesize of output 411114 [2024-01-27 15:09:50,455 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 20 proven. 20 refuted. 12 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-27 15:09:50,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720943691] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:09:50,455 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:09:50,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 15] total 38 [2024-01-27 15:09:50,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536338977] [2024-01-27 15:09:50,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:09:50,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-01-27 15:09:50,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:09:50,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-01-27 15:09:50,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=1103, Unknown=56, NotChecked=0, Total=1482 [2024-01-27 15:09:50,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 26 [2024-01-27 15:09:50,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 34 transitions, 216 flow. Second operand has 39 states, 39 states have (on average 6.923076923076923) internal successors, (270), 39 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:09:50,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:09:50,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 26 [2024-01-27 15:09:50,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:09:51,588 INFO L124 PetriNetUnfolderBase]: 22/76 cut-off events. [2024-01-27 15:09:51,588 INFO L125 PetriNetUnfolderBase]: For 234/234 co-relation queries the response was YES. [2024-01-27 15:09:51,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 322 conditions, 76 events. 22/76 cut-off events. For 234/234 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 78 event pairs, 0 based on Foata normal form. 1/76 useless extension candidates. Maximal degree in co-relation 288. Up to 20 conditions per place. [2024-01-27 15:09:51,590 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 0 selfloop transitions, 0 changer transitions 43/43 dead transitions. [2024-01-27 15:09:51,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 43 transitions, 316 flow [2024-01-27 15:09:51,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-01-27 15:09:51,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-01-27 15:09:51,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 116 transitions. [2024-01-27 15:09:51,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29743589743589743 [2024-01-27 15:09:51,591 INFO L175 Difference]: Start difference. First operand has 60 places, 34 transitions, 216 flow. Second operand 15 states and 116 transitions. [2024-01-27 15:09:51,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 43 transitions, 316 flow [2024-01-27 15:09:51,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 43 transitions, 274 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-01-27 15:09:51,594 INFO L231 Difference]: Finished difference. Result has 63 places, 0 transitions, 0 flow [2024-01-27 15:09:51,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=0, PETRI_PLACES=63, PETRI_TRANSITIONS=0} [2024-01-27 15:09:51,595 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 38 predicate places. [2024-01-27 15:09:51,595 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 0 transitions, 0 flow [2024-01-27 15:09:51,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 6.923076923076923) internal successors, (270), 39 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:09:51,598 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2024-01-27 15:09:51,598 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2024-01-27 15:09:51,599 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2024-01-27 15:09:51,618 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-01-27 15:09:51,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:09:51,818 INFO L445 BasicCegarLoop]: Path program histogram: [7, 1, 1] [2024-01-27 15:09:51,838 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-01-27 15:09:51,838 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-01-27 15:09:51,846 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.01 03:09:51 BasicIcfg [2024-01-27 15:09:51,846 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-01-27 15:09:51,847 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-01-27 15:09:51,847 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-01-27 15:09:51,847 INFO L274 PluginConnector]: Witness Printer initialized [2024-01-27 15:09:51,847 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:04:50" (3/4) ... [2024-01-27 15:09:51,849 INFO L137 WitnessPrinter]: Generating witness for correct program [2024-01-27 15:09:51,856 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2024-01-27 15:09:51,857 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2024-01-27 15:09:51,863 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 49 nodes and edges [2024-01-27 15:09:51,864 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 18 nodes and edges [2024-01-27 15:09:51,864 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2024-01-27 15:09:51,864 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2024-01-27 15:09:51,865 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2024-01-27 15:09:51,947 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2024-01-27 15:09:51,947 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.yml [2024-01-27 15:09:51,948 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-01-27 15:09:51,948 INFO L158 Benchmark]: Toolchain (without parser) took 302410.99ms. Allocated memory was 144.7MB in the beginning and 411.0MB in the end (delta: 266.3MB). Free memory was 109.2MB in the beginning and 229.3MB in the end (delta: -120.2MB). Peak memory consumption was 145.0MB. Max. memory is 16.1GB. [2024-01-27 15:09:51,948 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 104.9MB. Free memory is still 76.2MB. There was no memory consumed. Max. memory is 16.1GB. [2024-01-27 15:09:51,948 INFO L158 Benchmark]: CACSL2BoogieTranslator took 638.30ms. Allocated memory is still 144.7MB. Free memory was 109.2MB in the beginning and 75.6MB in the end (delta: 33.6MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. [2024-01-27 15:09:51,949 INFO L158 Benchmark]: Boogie Procedure Inliner took 45.55ms. Allocated memory is still 144.7MB. Free memory was 75.6MB in the beginning and 73.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-01-27 15:09:51,949 INFO L158 Benchmark]: Boogie Preprocessor took 87.69ms. Allocated memory is still 144.7MB. Free memory was 73.5MB in the beginning and 71.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-01-27 15:09:51,949 INFO L158 Benchmark]: RCFGBuilder took 594.33ms. Allocated memory is still 144.7MB. Free memory was 70.5MB in the beginning and 95.1MB in the end (delta: -24.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2024-01-27 15:09:51,949 INFO L158 Benchmark]: TraceAbstraction took 300938.63ms. Allocated memory was 144.7MB in the beginning and 411.0MB in the end (delta: 266.3MB). Free memory was 94.1MB in the beginning and 233.5MB in the end (delta: -139.4MB). Peak memory consumption was 129.0MB. Max. memory is 16.1GB. [2024-01-27 15:09:51,950 INFO L158 Benchmark]: Witness Printer took 101.09ms. Allocated memory is still 411.0MB. Free memory was 233.5MB in the beginning and 229.3MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-01-27 15:09:51,951 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 104.9MB. Free memory is still 76.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 638.30ms. Allocated memory is still 144.7MB. Free memory was 109.2MB in the beginning and 75.6MB in the end (delta: 33.6MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 45.55ms. Allocated memory is still 144.7MB. Free memory was 75.6MB in the beginning and 73.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 87.69ms. Allocated memory is still 144.7MB. Free memory was 73.5MB in the beginning and 71.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 594.33ms. Allocated memory is still 144.7MB. Free memory was 70.5MB in the beginning and 95.1MB in the end (delta: -24.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 300938.63ms. Allocated memory was 144.7MB in the beginning and 411.0MB in the end (delta: 266.3MB). Free memory was 94.1MB in the beginning and 233.5MB in the end (delta: -139.4MB). Peak memory consumption was 129.0MB. Max. memory is 16.1GB. * Witness Printer took 101.09ms. Allocated memory is still 411.0MB. Free memory was 233.5MB in the beginning and 229.3MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 1107]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 34 locations, 3 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: 300.8s, OverallIterations: 9, TraceHistogramMax: 8, PathProgramHistogramMax: 7, EmptinessCheckTime: 0.0s, AutomataDifference: 3.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 334 SdHoareTripleChecker+Valid, 1.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 329 mSDsluCounter, 226 SdHoareTripleChecker+Invalid, 1.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 220 mSDsCounter, 9 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2654 IncrementalHoareTripleChecker+Invalid, 2663 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 9 mSolverCounterUnsat, 6 mSDtfsCounter, 2654 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 480 GetRequests, 261 SyntacticMatches, 5 SemanticMatches, 214 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1927 ImplicationChecksByTransitivity, 287.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=216occurred in iteration=8, InterpolantAutomatonStates: 83, 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, 0.4s SatisfiabilityAnalysisTime, 294.6s InterpolantComputationTime, 397 NumberOfCodeBlocks, 397 NumberOfCodeBlocksAsserted, 32 NumberOfCheckSat, 556 ConstructedInterpolants, 14 QuantifiedInterpolants, 5767 SizeOfPredicates, 46 NumberOfNonLiveVariables, 1477 ConjunctsInSsa, 139 ConjunctsInUnsatCore, 23 InterpolantComputations, 2 PerfectInterpolantSequences, 80/504 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-01-27 15:09:52,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE